文献类型：期刊文献

英文题名：Fast and highly efficient removal of chromium (VI) using humus-supported nanoscale zero-valent iron: Influencing factors, kinetics and mechanism

作者：Fu, Rongbing[2];Zhang, Xian[1];Xu, Zhen[3];Guo, Xiaopin[3];Bi, Dongsu[1];Zhang, Wei[4]

机构：[1]Shanghai Inst Technol, Dept Chem Engn, Shanghai 201418, Peoples R China;[2]Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China;[3]Shanghai Acad Environm Sci, Shanghai 200233, Peoples R China;[4]East China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：174

起止页码：362

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20164803055423);WOS:【SCI-EXPANDED(收录号:WOS:000389091700042)】；

基金：This research was supported by the Talent Development Fund Project of Shanghai (grant No. 201325), the National Nature Science Foundation of China (grant No. 41372262), the Shanghai Environmental Protection Scientific Research Grand Project (grant Nos. Huhuanke 2013-04, Huhuanke 2015-105), the Nature Science Foundation of Shanghai (grant No. 13ZR1435100) and the National Nature Science Foundation of China (grant No. 41301344).

语种：英文

外文关键词：Humus-supported nanoscale zero-valent iron; Cr(VI); Adsorption; Mechanism

摘要：The injection of nanoscale zero-valent iron (NZVI) particles for groundwater remediation has received much interest. However, aggregation of NZVI has limited its application in site remediation. To overcome this problem, the synthesis of humus-supported nanoscale zero-valent (H-NZVI) with liquid-phase reducing method was investigated. A series of experimental results demonstrated that H-NZVI was successfully used to remove the chromium in groundwater with higher efficiency because of its high durability, good mechanical strength and dispersion. The removal mechanism of Cr(VI) from groundwater might consist of concurrent physical adsorption and chemical reduction onto the H-NZVI surface. Supported NZVI in humus has succeeded in preventing aggregation and oxidation. Batch experiment results showed that the rate of removal of Cr(VI) was in accord with pseudo-first-order reaction kinetics with different pH, initial Cr(VI) concentration and H-NZVI dosages. It is demonstrated that H-NZVI would become a promising eco-friendly material for in situ heavy metal remediation. (C) 2016 Elsevier B.V. All rights reserved.