The Experts below are selected from a list of 136269 Experts worldwide ranked by ideXlab platform
Kun Huang - One of the best experts on this subject based on the ideXlab platform.
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instability behavior of bubble supported Organic Liquid membrane in extraction of low concentration rare earths from in situ leaching solutions of ion adsorption ores
Minerals Engineering, 2020Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Zhenmin Zhao, Huizhou LiuAbstract:Abstract Gas bubble supported Organic extractant Liquid membrane exhibits a promising potential in enhanced extraction and separation of low-concentration rare earths from the in-situ leaching solutions of ion-adsorption ores. However, instability of Organic Liquid membrane on the surface of gas bubbles might result in dissolution loss of Organic extractant in the flowing-out aqueous raffinates and bring serious Organic pollution if the raffinates are recycled for re-leaching of rare-earth ores. The present work focuses on the mechanism of the instability of Organic extractant P507 Liquid membrane on the surface of bubbles during rare-earth extraction. Various effects, including volume flow rate of aqueous feed solution, initial aqueous pHs and concentrations of co-existing impurity ions, saponification degree of P507 and pre-loaded concentration of rare earths in Organic phase, on the stability of Organic Liquid membrane are discussed. Experimental results reveal that the stability of Organic Liquid membrane depends on three kinds of forces exerting on the surface of bubbles, i.e., the shear force Fs, the interface tension Ft and the dispersion force Fd. The occurrence of Ft and Fd are benefit for the stability, but Fs is not. The competition of the two component forces of Fs respectively with Ft and Fd will result in instability of Organic Liquid membrane and an increase in the concentration of total Organic phosphorus in the flowing-out raffinates. The present work provides a theoretical basis about how to control the stability of Organic extractant Liquid membrane on the surface of gas bubble. Based on the suggested new technique by bubble supported Organic Liquid membrane extraction, a green and environmentally friendly strategy is suggested for replacing the traditional ammonium bicarbonate precipitation to extract low-concentration rare earths from in-situ leaching solutions of ion-adsorption ores.
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wettability and spreading behavior of Organic extractant and its effect on formation of gas bubble supported Organic Liquid membrane for large phase ratio extraction
Chemical Engineering and Processing, 2019Co-Authors: Kun Huang, Kaiqiang Zhang, Xiaohong Wu, Zhenmin ZhaoAbstract:Abstract Our previous works suggested a novel method by spreading and covering a layer of Organic extractant on the surface of gas bubbles to perform gas bubble-supported Organic Liquid membrane extraction at large aqueous-to-Organic phase ratios. However, details about wettability and spreading kinetic behavior of Organic extractant within the annular gaps between the internal gas and the external oil needles in the injector was not clear, and so did its effect on formation of gas bubble-supported Organic Liquid membrane. In present work, spreading of P507 Organic extractant on surface of two kinds of typical solid substrates, glass and PVC, with different hydrophilic-hydrophobicity is investigated. It is found that the spreading empirical coefficient k is a simple mathematical function of three crucial operation parameters in the process of gas bubble-supported Organic membrane extraction: P507 concentration, saponification degree of P507, and pre-loading amount of rare earths in the Organic phase. A feasible mathematical model is suggested for theoretical prediction of the spreading rate. Calculation based on the new model is more convenient than de Gennes’s model. The present work provides a scientific foundation for the design of hydrophilic-hydrophobicity of the materials for making the internal gas and the external oil needles in the injector.
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chemical reaction driven spreading of an Organic extractant on the gas water interface insight into the controllable formation of a gas bubble supported Organic extractant Liquid membrane
Langmuir, 2019Co-Authors: Kun HuangAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In ...
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chemical reaction driven spreading of an Organic extractant on the gas water interface insight into the controllable formation of a gas bubble supported Organic extractant Liquid membrane
Langmuir, 2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas-water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas-water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios.
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Chemical Reaction-Driven Spreading of an Organic Extractant on the Gas–Water Interface: Insight into the Controllable Formation of a Gas Bubble-Supported Organic Extractant Liquid Membrane
2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas–water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas–water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios
Huizhou Liu - One of the best experts on this subject based on the ideXlab platform.
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instability behavior of bubble supported Organic Liquid membrane in extraction of low concentration rare earths from in situ leaching solutions of ion adsorption ores
Minerals Engineering, 2020Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Zhenmin Zhao, Huizhou LiuAbstract:Abstract Gas bubble supported Organic extractant Liquid membrane exhibits a promising potential in enhanced extraction and separation of low-concentration rare earths from the in-situ leaching solutions of ion-adsorption ores. However, instability of Organic Liquid membrane on the surface of gas bubbles might result in dissolution loss of Organic extractant in the flowing-out aqueous raffinates and bring serious Organic pollution if the raffinates are recycled for re-leaching of rare-earth ores. The present work focuses on the mechanism of the instability of Organic extractant P507 Liquid membrane on the surface of bubbles during rare-earth extraction. Various effects, including volume flow rate of aqueous feed solution, initial aqueous pHs and concentrations of co-existing impurity ions, saponification degree of P507 and pre-loaded concentration of rare earths in Organic phase, on the stability of Organic Liquid membrane are discussed. Experimental results reveal that the stability of Organic Liquid membrane depends on three kinds of forces exerting on the surface of bubbles, i.e., the shear force Fs, the interface tension Ft and the dispersion force Fd. The occurrence of Ft and Fd are benefit for the stability, but Fs is not. The competition of the two component forces of Fs respectively with Ft and Fd will result in instability of Organic Liquid membrane and an increase in the concentration of total Organic phosphorus in the flowing-out raffinates. The present work provides a theoretical basis about how to control the stability of Organic extractant Liquid membrane on the surface of gas bubble. Based on the suggested new technique by bubble supported Organic Liquid membrane extraction, a green and environmentally friendly strategy is suggested for replacing the traditional ammonium bicarbonate precipitation to extract low-concentration rare earths from in-situ leaching solutions of ion-adsorption ores.
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chemical reaction driven spreading of an Organic extractant on the gas water interface insight into the controllable formation of a gas bubble supported Organic extractant Liquid membrane
Langmuir, 2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas-water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas-water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios.
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Chemical Reaction-Driven Spreading of an Organic Extractant on the Gas–Water Interface: Insight into the Controllable Formation of a Gas Bubble-Supported Organic Extractant Liquid Membrane
2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas–water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas–water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios
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extraction of rare earths using bubbling Organic Liquid membrane with un saponified p507
Hydrometallurgy, 2018Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Weiyuan Song, Huizhou LiuAbstract:Abstract Extraction and enrichment of low-concentration rare earths from the in-situ leaching solutions of ion-absorbing type rare-earth ores using bubbling Organic Liquid membrane with un-saponified P507 was investigated. Experimental results revealed that saponification of P507 extractant are unnecessary for extraction of rare earths using bubbling Organic Liquid membrane. The equilibrium pH of the aqueous solutions flowing out from the extraction column would not decrease obviously, because the total volume of un-saponified P507 contacting with the aqueous phase in the column was very small, and the aqueous-to-Organic phase ratios could be very large. Therefore, the loading capacity of rare-earth ions in the Organic phase have no obvious changes, compared to that using saponified P507. Scale-up experiments in the pilot-scale columns connected in cascade for continuous countercurrent extraction of low-concentration rare earths about 100 mg/L in the leaching solutions demonstrated that, the final residual concentrations of rare earths remained below 3.0 mg/L, while total recovery of rare earths after extraction and stripping processes could reach above 90%. Bubbling Organic Liquid membrane extraction is in fact an interfacial chemical reaction of rare-earth ions with un-saponified P507 adsorbing at the surface of Organic Liquid membrane. During countercurrent extraction processes, shearing interaction of the aqueous solutions with dispersed Organic bubbles rising in the extraction column would result in continuous exposure of fresh surface of Organic bubbles, which is a main driving force to promote the mass transferring and enrichment of rare-earth ions into the Organic Liquid membrane layer.
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enrichment of low concentration rare earths from leach solutions of ion adsorption ores by bubbling Organic Liquid membrane extraction using n1923
ACS Sustainable Chemistry & Engineering, 2017Co-Authors: Jie Liu, Kun Huang, Huizhou LiuAbstract:A new bubbling Organic Liquid membrane extraction using primary amine N1923 at large aqueous-to-oil phase ratios was suggested to extract and enrich extremely low concentration rare earths from the acidic sulfate leach solutions of ion-absorbing type rare-earth ores. It was revealed that bubbling Organic Liquid membrane extraction was in fact an interfacial chemical reaction of Organic extractant molecules absorbing at the surface of the Organic Liquid membrane supported by gas bubbles with the target metal ions in the aqueous solutions. Rare earths with a concentration about 100 mg/L can be extracted selectively and enriched efficiently into the Organic extractant Liquid membrane layer covered on the surface of dispersed gas bubbles. However, Al in leach solutions was not extractable and remained in the raffinates, due to a kinetic nonequilibrium separation behavior of rare earths and Al on the surface of the Organic Liquid membrane. It was the differences in reaction rate of rare earths and Al with prim...
Jie Liu - One of the best experts on this subject based on the ideXlab platform.
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instability behavior of bubble supported Organic Liquid membrane in extraction of low concentration rare earths from in situ leaching solutions of ion adsorption ores
Minerals Engineering, 2020Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Zhenmin Zhao, Huizhou LiuAbstract:Abstract Gas bubble supported Organic extractant Liquid membrane exhibits a promising potential in enhanced extraction and separation of low-concentration rare earths from the in-situ leaching solutions of ion-adsorption ores. However, instability of Organic Liquid membrane on the surface of gas bubbles might result in dissolution loss of Organic extractant in the flowing-out aqueous raffinates and bring serious Organic pollution if the raffinates are recycled for re-leaching of rare-earth ores. The present work focuses on the mechanism of the instability of Organic extractant P507 Liquid membrane on the surface of bubbles during rare-earth extraction. Various effects, including volume flow rate of aqueous feed solution, initial aqueous pHs and concentrations of co-existing impurity ions, saponification degree of P507 and pre-loaded concentration of rare earths in Organic phase, on the stability of Organic Liquid membrane are discussed. Experimental results reveal that the stability of Organic Liquid membrane depends on three kinds of forces exerting on the surface of bubbles, i.e., the shear force Fs, the interface tension Ft and the dispersion force Fd. The occurrence of Ft and Fd are benefit for the stability, but Fs is not. The competition of the two component forces of Fs respectively with Ft and Fd will result in instability of Organic Liquid membrane and an increase in the concentration of total Organic phosphorus in the flowing-out raffinates. The present work provides a theoretical basis about how to control the stability of Organic extractant Liquid membrane on the surface of gas bubble. Based on the suggested new technique by bubble supported Organic Liquid membrane extraction, a green and environmentally friendly strategy is suggested for replacing the traditional ammonium bicarbonate precipitation to extract low-concentration rare earths from in-situ leaching solutions of ion-adsorption ores.
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a new type of electrolyte system to suppress polysulfide dissolution for lithium sulfur battery
ACS Nano, 2019Co-Authors: Tingzhou Yang, Jie Liu, Tao Qian, Nicholas S Grundish, Chenglin Yan, John B GoodenoughAbstract:Lithium-sulfur (Li-S) batteries have been explored extensively for high-capacity electric-power storage, but their practical application has been prevented by severe issues stemming from the use of a lithium anode and an Organic-Liquid electrolyte in which Li2Sx intermediates of the cell discharge reaction are soluble and shuttle to the anode. Both problems are addressed using bis(4-nitrophenyl) carbonate as an additive in the Organic-Liquid electrolyte. The soluble Li2Sx polysulfides react with the additive to create insoluble polysulfides with a lithium byproduct; this byproduct reacts with the Li-metal anode to create an anode passivation layer that is a good Li+ conductor, which allows for safe and rapid plating/stripping of lithium metal with a low impedance.
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chemical reaction driven spreading of an Organic extractant on the gas water interface insight into the controllable formation of a gas bubble supported Organic extractant Liquid membrane
Langmuir, 2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas-water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas-water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios.
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Chemical Reaction-Driven Spreading of an Organic Extractant on the Gas–Water Interface: Insight into the Controllable Formation of a Gas Bubble-Supported Organic Extractant Liquid Membrane
2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas–water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas–water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios
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extraction of rare earths using bubbling Organic Liquid membrane with un saponified p507
Hydrometallurgy, 2018Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Weiyuan Song, Huizhou LiuAbstract:Abstract Extraction and enrichment of low-concentration rare earths from the in-situ leaching solutions of ion-absorbing type rare-earth ores using bubbling Organic Liquid membrane with un-saponified P507 was investigated. Experimental results revealed that saponification of P507 extractant are unnecessary for extraction of rare earths using bubbling Organic Liquid membrane. The equilibrium pH of the aqueous solutions flowing out from the extraction column would not decrease obviously, because the total volume of un-saponified P507 contacting with the aqueous phase in the column was very small, and the aqueous-to-Organic phase ratios could be very large. Therefore, the loading capacity of rare-earth ions in the Organic phase have no obvious changes, compared to that using saponified P507. Scale-up experiments in the pilot-scale columns connected in cascade for continuous countercurrent extraction of low-concentration rare earths about 100 mg/L in the leaching solutions demonstrated that, the final residual concentrations of rare earths remained below 3.0 mg/L, while total recovery of rare earths after extraction and stripping processes could reach above 90%. Bubbling Organic Liquid membrane extraction is in fact an interfacial chemical reaction of rare-earth ions with un-saponified P507 adsorbing at the surface of Organic Liquid membrane. During countercurrent extraction processes, shearing interaction of the aqueous solutions with dispersed Organic bubbles rising in the extraction column would result in continuous exposure of fresh surface of Organic bubbles, which is a main driving force to promote the mass transferring and enrichment of rare-earth ions into the Organic Liquid membrane layer.
Wenqian Liu - One of the best experts on this subject based on the ideXlab platform.
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instability behavior of bubble supported Organic Liquid membrane in extraction of low concentration rare earths from in situ leaching solutions of ion adsorption ores
Minerals Engineering, 2020Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Zhenmin Zhao, Huizhou LiuAbstract:Abstract Gas bubble supported Organic extractant Liquid membrane exhibits a promising potential in enhanced extraction and separation of low-concentration rare earths from the in-situ leaching solutions of ion-adsorption ores. However, instability of Organic Liquid membrane on the surface of gas bubbles might result in dissolution loss of Organic extractant in the flowing-out aqueous raffinates and bring serious Organic pollution if the raffinates are recycled for re-leaching of rare-earth ores. The present work focuses on the mechanism of the instability of Organic extractant P507 Liquid membrane on the surface of bubbles during rare-earth extraction. Various effects, including volume flow rate of aqueous feed solution, initial aqueous pHs and concentrations of co-existing impurity ions, saponification degree of P507 and pre-loaded concentration of rare earths in Organic phase, on the stability of Organic Liquid membrane are discussed. Experimental results reveal that the stability of Organic Liquid membrane depends on three kinds of forces exerting on the surface of bubbles, i.e., the shear force Fs, the interface tension Ft and the dispersion force Fd. The occurrence of Ft and Fd are benefit for the stability, but Fs is not. The competition of the two component forces of Fs respectively with Ft and Fd will result in instability of Organic Liquid membrane and an increase in the concentration of total Organic phosphorus in the flowing-out raffinates. The present work provides a theoretical basis about how to control the stability of Organic extractant Liquid membrane on the surface of gas bubble. Based on the suggested new technique by bubble supported Organic Liquid membrane extraction, a green and environmentally friendly strategy is suggested for replacing the traditional ammonium bicarbonate precipitation to extract low-concentration rare earths from in-situ leaching solutions of ion-adsorption ores.
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chemical reaction driven spreading of an Organic extractant on the gas water interface insight into the controllable formation of a gas bubble supported Organic extractant Liquid membrane
Langmuir, 2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas-water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas-water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios.
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Chemical Reaction-Driven Spreading of an Organic Extractant on the Gas–Water Interface: Insight into the Controllable Formation of a Gas Bubble-Supported Organic Extractant Liquid Membrane
2019Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Huizhou LiuAbstract:The extraction and recovery of low-concentration valuable metals from various complex aqueous solutions or industrial waste waters have attracted extensive interests in recent years. In our previous works, we suggested a novel technique called bubbling Organic Liquid membrane extraction by spreading and covering an Organic extractant with extremely small volume on the surface of gas bubbles to form a layer of the gas bubble-supported Organic Liquid membrane for selective extraction and enrichment of low-concentration targets from dilute aqueous solutions. It was found that for successfully performing the bubbling Organic Liquid membrane extraction, a prerequisite is knowing how to control the formation of a stable Organic Liquid membrane covered on the surface of gas bubbles. However, once the Organic extractant starts to spread on the surface of gas bubbles, the extraction chemical reaction at the interface between the Organic extractant Liquid membrane and the rare-earth aqueous solution will occur. In the present work, the spreading behavior of the Organic extractant P507 on the surface of rare-earth aqueous solutions was investigated and was compared with the behaviors on the surface of deionized water. It was revealed that the spreading of the Organic extractant P507 on the surface of aqueous solutions containing rare-earth ions was accelerated because of the occurrence of the chemical reactions at the gas–water interface. The difference in the spreading rate of Organic extractant P507 Liquid droplets on the surface of deionized water and on that of Er(III) aqueous solutions with an increase in the P507 concentration, the saponification degrees of the P507 extractant, and the preloading amount of Er(III) in the P507 extractant revealed that the chemical reaction at the interface between the spreading P507 thin Liquid membrane and the Er(III) aqueous solution would result in the Marangoni convection along the interface, which is in favor of overcoming the resistance from the viscous force when the surface tension gradient replaces gravity as a dominant driving force for the spreading. The present work provides an experimental foundation toward understanding the effect of the interfacial chemical reaction on the spreading behavior of an Organic oil droplet on the gas–water interface. It is beneficial for the development of our suggested new technique of bubbling Organic Liquid membrane extraction and to achieve a controllable generation of a stable gas bubble-supported Organic Liquid membrane for performing solvent extraction at large aqueous-to-oil phase ratios
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extraction of rare earths using bubbling Organic Liquid membrane with un saponified p507
Hydrometallurgy, 2018Co-Authors: Jie Liu, Kun Huang, Wenqian Liu, Weiyuan Song, Huizhou LiuAbstract:Abstract Extraction and enrichment of low-concentration rare earths from the in-situ leaching solutions of ion-absorbing type rare-earth ores using bubbling Organic Liquid membrane with un-saponified P507 was investigated. Experimental results revealed that saponification of P507 extractant are unnecessary for extraction of rare earths using bubbling Organic Liquid membrane. The equilibrium pH of the aqueous solutions flowing out from the extraction column would not decrease obviously, because the total volume of un-saponified P507 contacting with the aqueous phase in the column was very small, and the aqueous-to-Organic phase ratios could be very large. Therefore, the loading capacity of rare-earth ions in the Organic phase have no obvious changes, compared to that using saponified P507. Scale-up experiments in the pilot-scale columns connected in cascade for continuous countercurrent extraction of low-concentration rare earths about 100 mg/L in the leaching solutions demonstrated that, the final residual concentrations of rare earths remained below 3.0 mg/L, while total recovery of rare earths after extraction and stripping processes could reach above 90%. Bubbling Organic Liquid membrane extraction is in fact an interfacial chemical reaction of rare-earth ions with un-saponified P507 adsorbing at the surface of Organic Liquid membrane. During countercurrent extraction processes, shearing interaction of the aqueous solutions with dispersed Organic bubbles rising in the extraction column would result in continuous exposure of fresh surface of Organic bubbles, which is a main driving force to promote the mass transferring and enrichment of rare-earth ions into the Organic Liquid membrane layer.
Hideto Matsuyama - One of the best experts on this subject based on the ideXlab platform.
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Organic solvent reverse osmosis membranes for Organic Liquid mixture separation a review
Journal of Membrane Science, 2021Co-Authors: Cuijing Liu, Guanying Dong, Toshinori Tsuru, Hideto MatsuyamaAbstract:Abstract The separation of Organic Liquid mixtures by Organic solvent reverse osmosis (OSRO) technology is promising owing to the high energy-efficiency. This article presents an overview of the endeavors made in the OSRO separation of Organic Liquid mixtures. First, the sub-nanometer separation characteristic of OSRO is introduced, and compared with pervaporation and Organic solvent nanofiltration. Next, the mixtures of interest which may benefit from OSRO technology such as polar/nonpolar mixtures and their application scenarios are presented. The energy evaluation of OSRO, pervaporation, and distillation processes is also performed, highlighting the energy conservation feature of OSRO process. Subsequently, the OSRO membranes developed to date are comprehensively reviewed in term of their membrane materials, diving into Organic (mainly cellulose types, polyethylene, polyamide, perfluoropolymer), inOrganic (carbon molecular sieves, silica, zeolite), and composite (polymers of intrinsic microporosity-1/AlOx) materials. The OSRO separation performances of the developed membranes are summarized and compared in term of flux and separation factor. Finally, we provide perspectives regarding the challenges and state the concluding remarks, in the hope that this review will inspire future studies to address efficient OSRO separations.
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highly improved Organic solvent reverse osmosis osro membrane for Organic Liquid mixture separation by simple heat treatment
Journal of Membrane Science, 2021Co-Authors: Cuijing Liu, Ryosuke Takagi, Daisuke Saeki, Liang Cheng, Takuji Shintani, Tomoki Yasui, Hideto MatsuyamaAbstract:Abstract The development of highly selective Organic solvent reverse osmosis (OSRO) membrane for Organic Liquid separation is in great demand, but remains very challenging owing to the small sizes of Organic Liquids. We recently reported a polyketone (PK) supported polyamide (PA) membrane as an OSRO membrane, but only with a moderate separation factor of 8.4 for methanol from a methanol/toluene mixture. Herein, a well-controlled two-step heat treatment; first oven heating, followed by hot water heating, was described to remarkably improve the selectivity. Heat treatment efficiently shrunk the PA layer and enhanced its hydrophilicity. Consequently, the separation factor was highly improved to 45.0, outperforming previously described membranes. The effects of crucial operation conditions, including co-solute, applied pressure, feed ratio, feed temperature, and operation time were evaluated. The developed highly selective OSRO membrane and systematical separation process investigation make significant contributions in addressing various Organic Liquid mixture separations.
