文献类型：期刊文献

英文题名：Highly-porous and excellent-capacity zirconium-chitosan composite with superior Sb(III)/Sb(V) removal performance

作者：Zhang, Lingfan[1];Lou, Sichao[1];Hao, Xiangrui[3];Zhang, Hongyan[3];Zhang, Wenqing[1];Liu, Xin[1];Huang, Jiaofang[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[3]Shanghai Nong Biol Prod Co Ltd NLBP, Shanghai, Peoples R China

年份：2022

卷号：303

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20224012836680);WOS:【SCI-EXPANDED(收录号:WOS:000871109700004)】；

基金：Acknowledgements Funding: This work was financially supported by the National Key Research and Development Program of China (Grant No. 2020YFA0908900) , the National Natural Science Foundation of China (Grant No. 31872728) , and the Natural Science Foundation of Shanghai (Grant No. 22ZR1416000 and 19ZR1477100) . We also thank the Research Center of Analysis and Test (ECUST) for help on data and characterization, especially thank the engineers X.J Liu and Y.Q Xi for supply the ICP-OES data.

语种：英文

外文关键词：Porous zirconium-chitosan composite; Facile synthesis; Antimony; Adsorption

摘要：A novel highly porous composite of zirconium-chitosan with excellent capacity for Sb(III) and Sb(V) adsorption has been successfully developed through a facile route. Due to the loss of H2O molecules coupled with Zr4+ after lyophilization, the as-prepared porous zirconium-chitosan (PZCS) composite possesses an open large-pore structure, which provides more adsorption sites for Sb(III) and Sb(V) removal. The adsorption experimental results illustrated that PZCS exhibited outstanding abilities in the removal of both Sb(III) and Sb(V), with the theoretical maximum adsorption capacities modeled by Langmuir isotherms of 408.3 and 635.1 mg g-1, respectively. Kinetic experimental data for both Sb(III) and Sb(V) followed a pseudo-second-order model due to the excellent correlation coefficient values (R2 greater than 0.996). With respect to the mechanism, the removal of Sb(III) involved a dehydration reaction between PZCS and Sb(III), while the removal of Sb(V) was closely related to electrostatic attraction between positive sites (Zr4+, -NH3+, -OH2+) and negatively charged ions (Sb (OH)6-) under acidic conditions. This study demonstrated that PZCS composites with environment-friendly, low-cost, and facile-preparation properties could have potential applications in water purification.