文献类型：期刊文献

英文题名：Insight into dispersibility regulation on arsenic removal using magnetic iron oxide nanoparticles

作者：Chen, Jun[1,2];Yu, Jianguo[1,3];Lin, Sen[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Salt Lake Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China

年份：2025

卷号：695

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20251118032659);WOS:【SCI-EXPANDED(收录号:WOS:001446226700001)】；

基金：This work was supported by the National Natural Science Foundation of China (92475114, 92475207) and Shanghai Rising-Star Program (22QA1402700) .

语种：英文

外文关键词：Arsenic removal; Adsorption; Magnetic nanoparticles; Agglomeration; Magnetic recovery

摘要：Magnetic iron oxide nanoparticles (MNPs) have been proved highly efficacious in aqueous arsenic contaminants removal while the inherent nanomaterial agglomeration impact on the adsorption performance and magnetic recoverability is still ambiguous. This study comprehensively investigated the varied MNPs dispersion resulting in the differential removal of As(III) and As(V) via experimental analysis and Molecular Dynamics (MD) simulation. It was confirmed the dispersibility would reduce near the isoelectric point and at higher ionic strengths in virtue of reducing repulsive interactions. The adsorption rates depended on the agglomeration degree that influence accessibility to adsorption sites, as well as electrostatic interactions and complexation reactions between arsenic species and the MNP surface, while the equilibrium adsorption capacity remained unchanged by ionic strength. Moreover, larger clusters formed through agglomeration facilitated rapid magnetic recovery, with bonded arsenic species altering surface electric properties and further influencing recovery efficiency, providing insights into improving the arsenic removal efficiency.