文献类型：期刊文献

英文题名：Effect of surfactants on the removal of nitrobenzene by Fe-bearing montmorillonite/Fe(II)

作者：Huang, Jin[1];Cao, Jie[1];Tu, Ni[1];Dong, Huaping[1];Li, Jianfa[1];Shou, Jianxin[2];Li, Yimin[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Coll Life Sci, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China

年份：2019

卷号：533

起止页码：409

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000447815200042)、、EI(收录号：20183605765761)、Scopus(收录号：2-s2.0-85052438631)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21477081, 21677101, the Natural Science Foundation of Zhejiang Province, China (LY16B070004), and the Research Project for Public Welfare of Zhejiang Province, China (2015C33229).

语种：英文

外文关键词：Surfactant; Fe-bearing clay mineral; Edge surface bound Fe(II); Nitrobenzene reduction; Secondary mineral; Adsorption

外文摘要：Nonionic and anionic surfactants often occur in anaerobic environments, but their roles in the removal of organic contaminants by Fe-bearing mineral/Fe(II) have not been determined. In this study, batch experiments were performed to investigate the effects of a nonionic surfactant (TX-100) and an anionic surfactant (SDBS) on the removal of nitrobenzene (NB) by Fe-bearing montmorillonite (FM)/Fe(II). Mossbauer spectrum and XPS were applied to analyze the edge surface bound Fe(II) and secondary minerals formed on FM. The contribution of surfactant to the enrichment of NB on FM was studied. The results showed that TX-100 and SDBS had opposite effects on the removal of NB by FM/Fe(II) at neutral pH. The presence of TX-100 improved the removal efficiency of NB from 36.4% to 70.0%, and increased the initial removal rate by 1.7 times. This enhancement effect was mainly attributed to the formation of more active edge surface bound Fe(II) that can reduce more NB to aniline. Formation of more magnetite on FM and selective enrichment of NB on the reactive surface also contributed to the removal of NB. In contrast, the presence of SDBS reduced the amount of edge surface bound Fe(II) via formation of SDBS-Fe(II) complex, which decreased the removal efficiency of NB. (C) 2018 Elsevier Inc. All rights reserved.