文献类型：期刊文献

英文题名：The kinetics and mechanisms of antimony removal from water by different zero-valent iron: The impact of synthesis methods and thermal annealing

作者：Ma, Pengyuan[1,2];Xie, Yulei[1,2];Han, Xiaolin[3];Wang, Xiaochong[1,2];Zhang, Wei[1,2,4];Xiu, Guangli[1,2,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Environm Protect Key Lab Environm Stand &, Shanghai 200237, Peoples R China;[3]Shandong Second Med Univ, Sch Publ Hlth, Weifang 261053, Shandong, Peoples R China;[4]Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：13

期号：6

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20254519468969);WOS:【SCI-EXPANDED(收录号:WOS:001585796200001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai [No. 25ZR1401092] and [No. 17ZR1407000] .

语种：英文

外文关键词：ZVI; Antimony; Synthesis method; Thermal annealing; Application conditions

摘要：Various zero-valent iron (ZVI) materials have been used to remove antimony (Sb) from water, but systematic comparisons of their removal capacities are limited. In this work, ZVI prepared via liquid-phase reduction, laser irradiation, and ball milling were evaluated for their abilities of removing Sb(III) and Sb(V) under rapid and slow stirring conditions to simulate the different kinetic scenarios of actual applications. Additionally, ZVI materials were modified by thermal annealing to assess its impact on Sb removal performance. Results showed that under rapid stirring, mu mZVI exhibited the highest removal capacities, with Q(e2) values of 27.28 mg/g for Sb(III) and 20.02 mg/g for Sb(V), following the order: mu mZVI > Cu/nZVI(BH) > nZVI(BH) > nZVI(L). After annealing, the order shifted to: hta-mu mZVI > hta-nZVI(L) > hta-nZVI(BH) > hta-Cu/nZVI(BH). Under slow stirring, nZVI(BH) outperformed others due to its larger specific surface area, followed by nZVI(L) and mu mZVI. The removal mechanism involved chemical and physical adsorption, redox reactions, and Fe(OH)(3) precipitation, based on the analysis of physicochemical parameters, XRD, and XPS. The corrosion of ZVI and chemical adsorption dominated the Sb removal process under rapid and slow stirring, respectively. Thermal annealing stabilized the oxide layer, reducing Sb removal under rapid stirring but enhancing it under slow stirring by accelerating electron transfer. This work improves understanding of Sb removal kinetics and mechanisms using different ZVI materials, aiding material selection in different application conditions in future.