The Experts below are selected from a list of 10392 Experts worldwide ranked by ideXlab platform
Baoping Xin - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of nano-sized Zn–Mn ferrite from the resulting bioleachate of obsolete Zn–Mn batteries at a high Pulp Density of 5.0% enhanced by the added Fe3+
Journal of Cleaner Production, 2019Co-Authors: Jia Wang, Zhirui Niu, Bingyang Tian, Yihui Bao, Baoping XinAbstract:Abstract Synthesis of Zn–Mn ferrite from spent Zn–Mn batteries using a multi-step process of bioleaching and co-precipitation represents a promising means in waste management of the spent batteries. However, the low Pulp Density of 1.0% in bioleaching process means a low yield of Zn–Mn ferrite. In this work, the cheap and benign Fe3+ was used to replace dangerous H2SO4 or expensive Cu2+ to promote bioleaching performance of spent batteries at a high Pulp Density of 5.0% for synthesis of Zn–Mn ferrite for the first time. The results displayed the addition of Fe3+ greatly enhanced bioleaching of spent batteries. The extraction efficiency of Zn and Mn increased from 34.5% to 29.4% to the maximum of 85.1% and 83.2%, respectively, when the concentration of added Fe3+ increased from 0 to 5.0 g/L. The added Fe3+ motivated more generation of both Fe2+ and sulfur to promote the growth of both Leptospirillum ferriphilum and Acidithiobacillus thiooxidans, respectively, attaining a higher bioleaching rate. The electro - chemical analysis also revealed the highest JCorr of 0.571 mA cm−2 occurred when the concentration of added Fe3+ was 5.0 g/L. The addition of Fe3+ at 5.0 g/L witnessed the maximum synthesis yield of Zn–Mn ferrite (52.6 g/L).
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Metallic ions catalysis for improving bioleaching yield of Zn and Mn from spent Zn-Mn batteries at high Pulp Density of 10.
Journal of hazardous materials, 2015Co-Authors: Zhirui Niu, Qifei Huang, Yiran Yang, Jia Wang, Baoping Xin, Shi ChenAbstract:Abstract Bioleaching of spent batteries was often conducted at Pulp Density of 1.0% or lower. In this work, metallic ions catalytic bioleaching was used for release Zn and Mn from spent ZMBs at 10% of Pulp Density. The results showed only Cu 2+ improved mobilization of Zn and Mn from the spent batteries among tested four metallic ions. When Cu 2+ content increased from 0 to 0.8 g/L, the maximum release efficiency elevated from 47.7% to 62.5% for Zn and from 30.9% to 62.4% for Mn, respectively. The Cu 2+ catalysis boosted bioleaching of resistant hetaerolite through forming a possible intermediate CuMn 2 O 4 which was subject to be attacked by Fe 3+ based on a cycle of Fe 3+ /Fe 2+ . However, poor growth of cells, formation of KFe 3 (SO 4 ) 2 (OH) 6 and its possible blockage between cells and energy matters destroyed the cycle of Fe 3+ /Fe 2+ , stopping bioleaching of hetaerolite. The chemical reaction controlled model fitted best for describing Cu 2+ catalytic bioleaching of spent ZMBs.
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Process controls for improving bioleaching performance of both Li and Co from spent lithium ion batteries at high Pulp Density and its thermodynamics and kinetics exploration.
Chemosphere, 2014Co-Authors: Zhirui Niu, Yikan Zou, Baoping Xin, Shi Chen, Changhao LiuAbstract:Release of Co and Li from spent lithium ion batteries (LIBs) by bioleaching has attracted growing attentions. However, the Pulp Density was only 1% or lower, meaning that a huge quantity of media was required for bioleaching. In this work, bioleaching behavior of the spent LIBs at Pulp densities ranging from 1% to 4% was investigated and process controls to improve bioleaching performance at Pulp Density of 2% were explored. The results showed that the Pulp Density exerted a considerable influence on leaching performance of Co and Li. The bioleaching efficiency decreased respectively from 52% to 10% for Co and from 80% to 37% for Li when Pulp Density rose from 1% to 4%. However, the maximum extraction efficiency of 89% for Li and 72% for Co was obtained at Pulp Density of 2% by process controls. Bioleaching of the spent LIBs has much greater potential to occur than traditional chemical leaching based on thermodynamics analysis. The product layer diffusion model described best bioleaching behavior of Co and Li.
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Analysis of reasons for decline of bioleaching efficiency of spent Zn-Mn batteries at high Pulp densities and exploration measure for improving performance.
Bioresource technology, 2012Co-Authors: Baoping Xin, Changhao Liu, Wenfeng Jiang, Li Xin, Kai Zhang, Renqing Wang, Yutao WangAbstract:The reasons for decline of bioleaching efficiency of Zn and Mn from spent batteries at high Pulp densities were analyzed; the measures for improving bioleaching efficiency were investigated. The results showed that extraction efficiency of Zn dropped from 100% at 1% of Pulp Density to 29.9% at 8% of Pulp Density, with Mn from 94% to only 2.5%. It was almost the linear reduction of the activity of the sulfur-oxidizing bacteria with increase of Pulp Density that witnessed declined bioleaching efficiency of Zn; it was the complete inactivation of the iron-oxidizing bacteria at 2% of Pulp Density or higher that witnessed declined bioleaching dose of Mn. By means of reducing initial pH value of leaching media, increasing concentration of energy matters and exogenous acid adjustment of media during bioleaching, the maximum extraction efficiency of almost 100% for Zn and 89% for Mn at 4% of Pulp Density was attained, respectively.
Zhirui Niu - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of nano-sized Zn–Mn ferrite from the resulting bioleachate of obsolete Zn–Mn batteries at a high Pulp Density of 5.0% enhanced by the added Fe3+
Journal of Cleaner Production, 2019Co-Authors: Jia Wang, Zhirui Niu, Bingyang Tian, Yihui Bao, Baoping XinAbstract:Abstract Synthesis of Zn–Mn ferrite from spent Zn–Mn batteries using a multi-step process of bioleaching and co-precipitation represents a promising means in waste management of the spent batteries. However, the low Pulp Density of 1.0% in bioleaching process means a low yield of Zn–Mn ferrite. In this work, the cheap and benign Fe3+ was used to replace dangerous H2SO4 or expensive Cu2+ to promote bioleaching performance of spent batteries at a high Pulp Density of 5.0% for synthesis of Zn–Mn ferrite for the first time. The results displayed the addition of Fe3+ greatly enhanced bioleaching of spent batteries. The extraction efficiency of Zn and Mn increased from 34.5% to 29.4% to the maximum of 85.1% and 83.2%, respectively, when the concentration of added Fe3+ increased from 0 to 5.0 g/L. The added Fe3+ motivated more generation of both Fe2+ and sulfur to promote the growth of both Leptospirillum ferriphilum and Acidithiobacillus thiooxidans, respectively, attaining a higher bioleaching rate. The electro - chemical analysis also revealed the highest JCorr of 0.571 mA cm−2 occurred when the concentration of added Fe3+ was 5.0 g/L. The addition of Fe3+ at 5.0 g/L witnessed the maximum synthesis yield of Zn–Mn ferrite (52.6 g/L).
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Metallic ions catalysis for improving bioleaching yield of Zn and Mn from spent Zn-Mn batteries at high Pulp Density of 10.
Journal of hazardous materials, 2015Co-Authors: Zhirui Niu, Qifei Huang, Yiran Yang, Jia Wang, Baoping Xin, Shi ChenAbstract:Abstract Bioleaching of spent batteries was often conducted at Pulp Density of 1.0% or lower. In this work, metallic ions catalytic bioleaching was used for release Zn and Mn from spent ZMBs at 10% of Pulp Density. The results showed only Cu 2+ improved mobilization of Zn and Mn from the spent batteries among tested four metallic ions. When Cu 2+ content increased from 0 to 0.8 g/L, the maximum release efficiency elevated from 47.7% to 62.5% for Zn and from 30.9% to 62.4% for Mn, respectively. The Cu 2+ catalysis boosted bioleaching of resistant hetaerolite through forming a possible intermediate CuMn 2 O 4 which was subject to be attacked by Fe 3+ based on a cycle of Fe 3+ /Fe 2+ . However, poor growth of cells, formation of KFe 3 (SO 4 ) 2 (OH) 6 and its possible blockage between cells and energy matters destroyed the cycle of Fe 3+ /Fe 2+ , stopping bioleaching of hetaerolite. The chemical reaction controlled model fitted best for describing Cu 2+ catalytic bioleaching of spent ZMBs.
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Process controls for improving bioleaching performance of both Li and Co from spent lithium ion batteries at high Pulp Density and its thermodynamics and kinetics exploration.
Chemosphere, 2014Co-Authors: Zhirui Niu, Yikan Zou, Baoping Xin, Shi Chen, Changhao LiuAbstract:Release of Co and Li from spent lithium ion batteries (LIBs) by bioleaching has attracted growing attentions. However, the Pulp Density was only 1% or lower, meaning that a huge quantity of media was required for bioleaching. In this work, bioleaching behavior of the spent LIBs at Pulp densities ranging from 1% to 4% was investigated and process controls to improve bioleaching performance at Pulp Density of 2% were explored. The results showed that the Pulp Density exerted a considerable influence on leaching performance of Co and Li. The bioleaching efficiency decreased respectively from 52% to 10% for Co and from 80% to 37% for Li when Pulp Density rose from 1% to 4%. However, the maximum extraction efficiency of 89% for Li and 72% for Co was obtained at Pulp Density of 2% by process controls. Bioleaching of the spent LIBs has much greater potential to occur than traditional chemical leaching based on thermodynamics analysis. The product layer diffusion model described best bioleaching behavior of Co and Li.
Shi Chen - One of the best experts on this subject based on the ideXlab platform.
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Metallic ions catalysis for improving bioleaching yield of Zn and Mn from spent Zn-Mn batteries at high Pulp Density of 10.
Journal of hazardous materials, 2015Co-Authors: Zhirui Niu, Qifei Huang, Yiran Yang, Jia Wang, Baoping Xin, Shi ChenAbstract:Abstract Bioleaching of spent batteries was often conducted at Pulp Density of 1.0% or lower. In this work, metallic ions catalytic bioleaching was used for release Zn and Mn from spent ZMBs at 10% of Pulp Density. The results showed only Cu 2+ improved mobilization of Zn and Mn from the spent batteries among tested four metallic ions. When Cu 2+ content increased from 0 to 0.8 g/L, the maximum release efficiency elevated from 47.7% to 62.5% for Zn and from 30.9% to 62.4% for Mn, respectively. The Cu 2+ catalysis boosted bioleaching of resistant hetaerolite through forming a possible intermediate CuMn 2 O 4 which was subject to be attacked by Fe 3+ based on a cycle of Fe 3+ /Fe 2+ . However, poor growth of cells, formation of KFe 3 (SO 4 ) 2 (OH) 6 and its possible blockage between cells and energy matters destroyed the cycle of Fe 3+ /Fe 2+ , stopping bioleaching of hetaerolite. The chemical reaction controlled model fitted best for describing Cu 2+ catalytic bioleaching of spent ZMBs.
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Process controls for improving bioleaching performance of both Li and Co from spent lithium ion batteries at high Pulp Density and its thermodynamics and kinetics exploration.
Chemosphere, 2014Co-Authors: Zhirui Niu, Yikan Zou, Baoping Xin, Shi Chen, Changhao LiuAbstract:Release of Co and Li from spent lithium ion batteries (LIBs) by bioleaching has attracted growing attentions. However, the Pulp Density was only 1% or lower, meaning that a huge quantity of media was required for bioleaching. In this work, bioleaching behavior of the spent LIBs at Pulp densities ranging from 1% to 4% was investigated and process controls to improve bioleaching performance at Pulp Density of 2% were explored. The results showed that the Pulp Density exerted a considerable influence on leaching performance of Co and Li. The bioleaching efficiency decreased respectively from 52% to 10% for Co and from 80% to 37% for Li when Pulp Density rose from 1% to 4%. However, the maximum extraction efficiency of 89% for Li and 72% for Co was obtained at Pulp Density of 2% by process controls. Bioleaching of the spent LIBs has much greater potential to occur than traditional chemical leaching based on thermodynamics analysis. The product layer diffusion model described best bioleaching behavior of Co and Li.
Changhao Liu - One of the best experts on this subject based on the ideXlab platform.
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Process controls for improving bioleaching performance of both Li and Co from spent lithium ion batteries at high Pulp Density and its thermodynamics and kinetics exploration.
Chemosphere, 2014Co-Authors: Zhirui Niu, Yikan Zou, Baoping Xin, Shi Chen, Changhao LiuAbstract:Release of Co and Li from spent lithium ion batteries (LIBs) by bioleaching has attracted growing attentions. However, the Pulp Density was only 1% or lower, meaning that a huge quantity of media was required for bioleaching. In this work, bioleaching behavior of the spent LIBs at Pulp densities ranging from 1% to 4% was investigated and process controls to improve bioleaching performance at Pulp Density of 2% were explored. The results showed that the Pulp Density exerted a considerable influence on leaching performance of Co and Li. The bioleaching efficiency decreased respectively from 52% to 10% for Co and from 80% to 37% for Li when Pulp Density rose from 1% to 4%. However, the maximum extraction efficiency of 89% for Li and 72% for Co was obtained at Pulp Density of 2% by process controls. Bioleaching of the spent LIBs has much greater potential to occur than traditional chemical leaching based on thermodynamics analysis. The product layer diffusion model described best bioleaching behavior of Co and Li.
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Analysis of reasons for decline of bioleaching efficiency of spent Zn-Mn batteries at high Pulp densities and exploration measure for improving performance.
Bioresource technology, 2012Co-Authors: Baoping Xin, Changhao Liu, Wenfeng Jiang, Li Xin, Kai Zhang, Renqing Wang, Yutao WangAbstract:The reasons for decline of bioleaching efficiency of Zn and Mn from spent batteries at high Pulp densities were analyzed; the measures for improving bioleaching efficiency were investigated. The results showed that extraction efficiency of Zn dropped from 100% at 1% of Pulp Density to 29.9% at 8% of Pulp Density, with Mn from 94% to only 2.5%. It was almost the linear reduction of the activity of the sulfur-oxidizing bacteria with increase of Pulp Density that witnessed declined bioleaching efficiency of Zn; it was the complete inactivation of the iron-oxidizing bacteria at 2% of Pulp Density or higher that witnessed declined bioleaching dose of Mn. By means of reducing initial pH value of leaching media, increasing concentration of energy matters and exogenous acid adjustment of media during bioleaching, the maximum extraction efficiency of almost 100% for Zn and 89% for Mn at 4% of Pulp Density was attained, respectively.
Jia Wang - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of nano-sized Zn–Mn ferrite from the resulting bioleachate of obsolete Zn–Mn batteries at a high Pulp Density of 5.0% enhanced by the added Fe3+
Journal of Cleaner Production, 2019Co-Authors: Jia Wang, Zhirui Niu, Bingyang Tian, Yihui Bao, Baoping XinAbstract:Abstract Synthesis of Zn–Mn ferrite from spent Zn–Mn batteries using a multi-step process of bioleaching and co-precipitation represents a promising means in waste management of the spent batteries. However, the low Pulp Density of 1.0% in bioleaching process means a low yield of Zn–Mn ferrite. In this work, the cheap and benign Fe3+ was used to replace dangerous H2SO4 or expensive Cu2+ to promote bioleaching performance of spent batteries at a high Pulp Density of 5.0% for synthesis of Zn–Mn ferrite for the first time. The results displayed the addition of Fe3+ greatly enhanced bioleaching of spent batteries. The extraction efficiency of Zn and Mn increased from 34.5% to 29.4% to the maximum of 85.1% and 83.2%, respectively, when the concentration of added Fe3+ increased from 0 to 5.0 g/L. The added Fe3+ motivated more generation of both Fe2+ and sulfur to promote the growth of both Leptospirillum ferriphilum and Acidithiobacillus thiooxidans, respectively, attaining a higher bioleaching rate. The electro - chemical analysis also revealed the highest JCorr of 0.571 mA cm−2 occurred when the concentration of added Fe3+ was 5.0 g/L. The addition of Fe3+ at 5.0 g/L witnessed the maximum synthesis yield of Zn–Mn ferrite (52.6 g/L).
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Screening Bioleaching Systems and Operational Conditions for Optimal Ni Recovery from Dry Electroplating Sludge and Exploration of the Leaching Mechanisms Involved
Geomicrobiology Journal, 2015Co-Authors: Yiran Yang, Jia Wang, Qifei HuangAbstract:ABSTRACTRecovery of valuable metals from electroplating sludge by bioleaching has attracted growing attention. However, extraction efficiency of metals was generally rather low even at a low Pulp Density of 1%–2% owing to failing to find the most suitable bioleaching system. In this work, high Ni recovery yield from electroplating nickel slag at a Pulp Density of 10% was attained by determining the best bioleaching process. The results showed the sulfur-A.t system exhibited the greatest extraction efficiency among the three bioleaching systems tested. The dissolved concentration of Ni and leaching efficiency reached 5400 mg/l and 90%, respectively, after 9 days of contact. Furthermore, 100% of Ni extraction was obtained at a Pulp Density of 10% by the sulfur-A.t system through optimizing operational conditions. Acid dissolution by biogenic H2SO4 was the dominating mechanism for Ni leaching in the sulfur-A.t system. However, other unknown leaching mechanisms also occurred which resulted in 19% Ni extractio...
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Metallic ions catalysis for improving bioleaching yield of Zn and Mn from spent Zn-Mn batteries at high Pulp Density of 10.
Journal of hazardous materials, 2015Co-Authors: Zhirui Niu, Qifei Huang, Yiran Yang, Jia Wang, Baoping Xin, Shi ChenAbstract:Abstract Bioleaching of spent batteries was often conducted at Pulp Density of 1.0% or lower. In this work, metallic ions catalytic bioleaching was used for release Zn and Mn from spent ZMBs at 10% of Pulp Density. The results showed only Cu 2+ improved mobilization of Zn and Mn from the spent batteries among tested four metallic ions. When Cu 2+ content increased from 0 to 0.8 g/L, the maximum release efficiency elevated from 47.7% to 62.5% for Zn and from 30.9% to 62.4% for Mn, respectively. The Cu 2+ catalysis boosted bioleaching of resistant hetaerolite through forming a possible intermediate CuMn 2 O 4 which was subject to be attacked by Fe 3+ based on a cycle of Fe 3+ /Fe 2+ . However, poor growth of cells, formation of KFe 3 (SO 4 ) 2 (OH) 6 and its possible blockage between cells and energy matters destroyed the cycle of Fe 3+ /Fe 2+ , stopping bioleaching of hetaerolite. The chemical reaction controlled model fitted best for describing Cu 2+ catalytic bioleaching of spent ZMBs.
