The Experts below are selected from a list of 21402 Experts worldwide ranked by ideXlab platform
Somenath Mitra - One of the best experts on this subject based on the ideXlab platform.
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adsorption of arsenic on multiwall carbon nanotube zirconia nanohybrid for potential Drinking Water purification
Journal of Colloid and Interface Science, 2012Co-Authors: Susana Addo Ntim, Somenath MitraAbstract:Abstract The adsorptive removal of arsenic from Water using a multiwall carbon nanotube–zirconia nanohybrid (MWCNT–ZrO 2 ) is presented. The MWCNT–ZrO 2 with 4.85% zirconia was effective in meeting the Drinking Water Standard levels of 10 μg L −1 . The absorption capacity of the composite were 2000 μg g −1 and 5000 μg g −1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT–ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT–ZrO 2 was that the adsorption capacity was not a function of pH.
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removal of trace arsenic to meet Drinking Water Standards using iron oxide coated multiwall carbon nanotubes
Journal of Chemical & Engineering Data, 2011Co-Authors: Susana Addo Ntim, Somenath MitraAbstract:This study presents the removal of trace level arsenic to meet Drinking Water Standards using an iron oxide-multiwalled carbon nanotube (Fe-MWCNT) hybrid as a sorbent. The synthesis was facilitated by the high degree of nanotube functionalization using a microwave-assisted process, and a controlled assembly of iron oxide was possible where the MWCNT served as an effective support for the oxide. In the final product, 11 % of the carbon atoms were attached to Fe. The Fe-MWCNT was effective in arsenic removal to below the Drinking Water Standard levels of 10 μg·L–1. The absorption capacity of the composite was 1723 μg·g–1 and 189 μg·g–1 for As(III) and As(V), respectively. The adsorption of As(V) on Fe-MWCNT was faster than that of As(III). The pseudosecond-order rate equation was found to effectively describe the kinetics of arsenic adsorption. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models.
Ben Zhong Tang - One of the best experts on this subject based on the ideXlab platform.
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room temperature one step conversion from elemental sulfur to functional polythioureas through catalyst free multicomponent polymerizations
Journal of the American Chemical Society, 2018Co-Authors: Tian Tian, Ben Zhong TangAbstract:The utilization of sulfur is a global concern, considering the abundant and cheap source of sulfur from nature and petroleum industry, its limited consumption, and the safety/environmental problems caused during storage. The economic and efficient transformation of sulfur remains to be a great challenge for both academia and industry. Herein, a room temperature conversion from sulfur to functional polythioureas was reported through a catalyst-free multicomponent polymerization of sulfur, aliphatic diamines, and diisocyanides in air with 100% atom economy. The polymerization enjoys quick reaction and wide monomer scope, which affords 16 polythioureas with well-defined structures, high molecular weights (Mws up to 242 500 g/mol), and excellent yields (up to 95%). The polythioureas can be utilized to detect mercury pollution with high sensitivity (Ksv = 224 900 L/mol) and high selectivity, clean Hg2+ with high removal efficiency (>99.99%) to achieve Drinking Water Standard, and monitor the real-time removal ...
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Room Temperature One-Step Conversion from Elemental Sulfur to Functional Polythioureas through Catalyst-Free Multicomponent Polymerizations
2018Co-Authors: Tian Tian, Ben Zhong TangAbstract:The utilization of sulfur is a global concern, considering the abundant and cheap source of sulfur from nature and petroleum industry, its limited consumption, and the safety/environmental problems caused during storage. The economic and efficient transformation of sulfur remains to be a great challenge for both academia and industry. Herein, a room temperature conversion from sulfur to functional polythioureas was reported through a catalyst-free multicomponent polymerization of sulfur, aliphatic diamines, and diisocyanides in air with 100% atom economy. The polymerization enjoys quick reaction and wide monomer scope, which affords 16 polythioureas with well-defined structures, high molecular weights (Mws up to 242 500 g/mol), and excellent yields (up to 95%). The polythioureas can be utilized to detect mercury pollution with high sensitivity (Ksv = 224 900 L/mol) and high selectivity, clean Hg2+ with high removal efficiency (>99.99%) to achieve Drinking Water Standard, and monitor the real-time removal process by fluorescence
Susana Addo Ntim - One of the best experts on this subject based on the ideXlab platform.
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adsorption of arsenic on multiwall carbon nanotube zirconia nanohybrid for potential Drinking Water purification
Journal of Colloid and Interface Science, 2012Co-Authors: Susana Addo Ntim, Somenath MitraAbstract:Abstract The adsorptive removal of arsenic from Water using a multiwall carbon nanotube–zirconia nanohybrid (MWCNT–ZrO 2 ) is presented. The MWCNT–ZrO 2 with 4.85% zirconia was effective in meeting the Drinking Water Standard levels of 10 μg L −1 . The absorption capacity of the composite were 2000 μg g −1 and 5000 μg g −1 for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT–ZrO 2 was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT–ZrO 2 was that the adsorption capacity was not a function of pH.
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removal of trace arsenic to meet Drinking Water Standards using iron oxide coated multiwall carbon nanotubes
Journal of Chemical & Engineering Data, 2011Co-Authors: Susana Addo Ntim, Somenath MitraAbstract:This study presents the removal of trace level arsenic to meet Drinking Water Standards using an iron oxide-multiwalled carbon nanotube (Fe-MWCNT) hybrid as a sorbent. The synthesis was facilitated by the high degree of nanotube functionalization using a microwave-assisted process, and a controlled assembly of iron oxide was possible where the MWCNT served as an effective support for the oxide. In the final product, 11 % of the carbon atoms were attached to Fe. The Fe-MWCNT was effective in arsenic removal to below the Drinking Water Standard levels of 10 μg·L–1. The absorption capacity of the composite was 1723 μg·g–1 and 189 μg·g–1 for As(III) and As(V), respectively. The adsorption of As(V) on Fe-MWCNT was faster than that of As(III). The pseudosecond-order rate equation was found to effectively describe the kinetics of arsenic adsorption. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models.
Qiuming Peng - One of the best experts on this subject based on the ideXlab platform.
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unique lead adsorption behavior of activated hydroxyl group in two dimensional titanium carbide
Journal of the American Chemical Society, 2014Co-Authors: Qiuming Peng, Qingrui Zhang, Jianyong Xiang, Aiguo Zhou, Yongjun TianAbstract:The functional groups and site interactions on the surfaces of two-dimensional (2D) layered titanium carbide can be tailored to attain some extraordinary physical properties. Herein a 2D alk-MXene (Ti3C2(OH/ONa)xF2–x) material, prepared by chemical exfoliation followed by alkalization intercalation, exhibits preferential Pb(II) sorption behavior when competing cations (Ca(II)/Mg(II)) coexisted at high levels. Kinetic tests show that the sorption equilibrium is achieved in as short a time as 120 s. Attractively, the alk-MXene presents efficient Pb(II) uptake performance with the applied sorption capacities of 4500 kg Water per alk-MXene, and the effluent Pb(II) contents are below the Drinking Water Standard recommended by the World Health Organization (10 μg/L). Experimental and computational studies suggest that the sorption behavior is related to the hydroxyl groups in activated Ti sites, where Pb(II) ion exchange is facilitated by the formation of a hexagonal potential trap.
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unique lead adsorption behavior of activated hydroxyl group in two dimensional titanium carbide
Journal of the American Chemical Society, 2014Co-Authors: Qiuming Peng, Qingrui Zhang, Jianyong Xiang, Aiguo Zhou, Jianxi Guo, Aozhong Liu, Riping Liu, Yongju TiaAbstract:The functional groups and site interactions on the surfaces of two-dimensional (2D) layered titanium carbide can be tailored to attain some extraordinary physical properties. Herein a 2D alk-MXene (Ti3C2(OH/ONa)xF2–x) material, prepared by chemical exfoliation followed by alkalization intercalation, exhibits preferential Pb(II) sorption behavior when competing cations (Ca(II)/Mg(II)) coexisted at high levels. Kinetic tests show that the sorption equilibrium is achieved in as short a time as 120 s. Attractively, the alk-MXene presents efficient Pb(II) uptake performance with the applied sorption capacities of 4500 kg Water per alk-MXene, and the effluent Pb(II) contents are below the Drinking Water Standard recommended by the World Health Organization (10 μg/L). Experimental and computational studies suggest that the sorption behavior is related to the hydroxyl groups in activated Ti sites, where Pb(II) ion exchange is facilitated by the formation of a hexagonal potential trap.
Yongju Tia - One of the best experts on this subject based on the ideXlab platform.
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unique lead adsorption behavior of activated hydroxyl group in two dimensional titanium carbide
Journal of the American Chemical Society, 2014Co-Authors: Qiuming Peng, Qingrui Zhang, Jianyong Xiang, Aiguo Zhou, Jianxi Guo, Aozhong Liu, Riping Liu, Yongju TiaAbstract:The functional groups and site interactions on the surfaces of two-dimensional (2D) layered titanium carbide can be tailored to attain some extraordinary physical properties. Herein a 2D alk-MXene (Ti3C2(OH/ONa)xF2–x) material, prepared by chemical exfoliation followed by alkalization intercalation, exhibits preferential Pb(II) sorption behavior when competing cations (Ca(II)/Mg(II)) coexisted at high levels. Kinetic tests show that the sorption equilibrium is achieved in as short a time as 120 s. Attractively, the alk-MXene presents efficient Pb(II) uptake performance with the applied sorption capacities of 4500 kg Water per alk-MXene, and the effluent Pb(II) contents are below the Drinking Water Standard recommended by the World Health Organization (10 μg/L). Experimental and computational studies suggest that the sorption behavior is related to the hydroxyl groups in activated Ti sites, where Pb(II) ion exchange is facilitated by the formation of a hexagonal potential trap.
