文献类型：期刊文献

英文题名：Effects of magnetic field on selenite removal by sulfidated zero valent iron under aerobic conditions

作者：Liang, Liping[1,2];Tan, Weishou[1];Xue, Yuanyuan[1];Xi, Fenfen[1];Meng, Xu[3];Hu, Baowei[1];Du, Juanshan[4]

机构：[1]Shaoxing Univ, Coll Life Sci, Shaoxing 312000, Peoples R China;[2]Donghua Univ, Coll Chem, Shanghai 201620, Peoples R China;[3]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, Shaoxing 312000, Peoples R China;[4]Pohang Univ Sci & Technol POSTECH, Div Environm Sci & Engn, Pohang 37673, South Korea

年份：2022

卷号：831

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:000821053200001)、、EI(收录号：20221511940531)、Scopus(收录号：2-s2.0-85127562440)、WOS

基金：This research was financially supported by the National Natural Science Foundation of China (Grant No. 41807468), Natural Science Foundation of Zhejiang Province (Grant No. LY18E080018), Postdoctoral Research Foundation of China (2021M702886), and National College Students Innovation and Entrepreneurship Training Program (NO.202010349035). We thank beamline BL14W1 at the Shanghai Synchrotron Radiation Facility for providing the beam time.

语种：英文

外文关键词：Reduction; Absorption; Consecutive runs; XANES analysis; Selenite (Se(IV))

外文摘要：A novel strategy of sulfide modified zero valent iron (S-ZVI) coupled with the magnetic field (MF) is developed for selenite (Se(IV)) removal. The original ZVI particle size (30 mu m), S/Fe ratio (1:80), solution pH (5), S-ZVI loading (0.75 g L-1), and MF intensity (20 mT) can exhibit the optimal enhancement effects of MF on Se(IV) removal by S-ZVI. Common corrosion promoters (Cl-, PO43-, SO42-, Mg2+, and Ca2+) and inhibitors (NO3-, SiO32-, and CO32-) show positive and negative effects on Se(IV) removal by S-ZVI, respectively. But MF can alleviate promoting or inhibiting effects of coexisting ions on Se(IV) removal by S-ZVI, and well preserve the reactivity of S-ZVI from background ions in water. Furthermore, MF can also enhance the reactivity of S-ZVI towards Se(IV) during consecutive experiments, the promotion factor (the ratio of k(obs) with MF to k(obs) without MF) increased from 2.57 to 5.83 with the increase of cycles. MF can not only improve the reactivity of ZVI covered with iron oxide or iron hydroxide but also effectively enhance the ability of ZVI covered with iron sulfide. S-ZVI exhibited good stability and recyclability in the presence of MF. XANES analysis of selenium species reveals that the reductive product of Se(IV) with or without MF is primarily Se(0), and Se(IV) removal by S-ZVI can be ascribed to adsorption and reduction. This work indicates that MF may widen the application of S-ZVI for pollutants removal in environmental remediation.