Enhanced Nitrobenzene reduction by zero valent iron pretreated with H2O2/HCl
Enhanced Nitrobenzene reduction by zero valent iron pretreated with H2O2/HCl
复制标题
H2O2/HCl 预处理的零价铁增强硝基苯还原
DOI：
10.1016/j.chemosphere.2018.01.068
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发表时间：
2018
期刊：
影响因子：
8.8
通讯作者：
Bingcai Pan
中科院分区：
文献类型：
--
作者：
Zhe Yang;Xiaowen Ma;Chao Shan;Zhuoyao Fang;Bingcai Pan
In this study a novel iron-based reducing agent of highly effective reduction toward nitrobenzene (NB) was obtained by pretreating zero valent iron (ZVI) with H2O2/HCl. During the H2O2/HCl pretreatment, ZVI undergoes an intensive corrosion process with formation of various reducing corrosion products (e.g., Fe2+, ferrous oxides/hydroxides, Fe3O4), yielding a synergetic system (prtZVI) including liquid, suspensions and solid phase. The pretreatment process remarkably enhances the reductive performance of ZVI, where a rapid reduction of NB (200 mg L−1) in the prtZVI suspension was accomplished in a broad pH range (3–9) and at low dosage. Nitrosobenzene and phenylhydroxylamine are identified as the intermediates for NB reduction with the end-product of aniline. Compared with the virgin ZVI as well as another nanosized ZVI, the prtZVI system exhibits much higher electron efficiency for NB reduction as well as higher utilization ratio of Fe0. A rapid reduction of various nitroaromatics in an actual pharmaceutical wastewater further demonstrated the feasibility of the prtZVI system in real wastewater treatment.
