文献类型：期刊文献

英文题名：Macroscopic and spectroscopic studies of the enhanced scavenging of Cr(VI) and Se(VI) from water by titanate nanotube anchored nanoscale zero-valent iron

作者：Hu, Baowei[1];Chen, Guohe[1];Jin, Chengan[1];Hu, Jun[4];Huang, Chengcai[1];Sheng, Jiang[6];Sheng, Guodong[1,2,3];Ma, Jingyuan[5];Huang, Yuying[5]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Coll Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]North China Elect Power Univ, Sch Chem & Environm, Beijing 102206, Peoples R China;[3]Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China;[4]Dongguan Univ Technol, Sch Elect Engn, Dongguan 523808, Guangdong, Peoples R China;[5]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[6]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

年份：2017

卷号：336

起止页码：214

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000403519600024)、、EI(收录号：20171903646904)、Scopus(收录号：2-s2.0-85018758825)、WOS

基金：Financial supports from the National Natural Science Foundation of China (21577093 and 21207092), Natural Science Foundation of Zhejiang Province (LY15B070001) is greatly acknowledged. The authors also thank beamline BL14W1 (Shang-hai Synchrotron Radiation Facility) for providing the beam time.

语种：英文

外文关键词：Cr(VI) and Se(VI); Nanoscale zero-valent iron; Titanate nanotubes; X-ray absorption fine structure

外文摘要：Herein, a promising titanate nanotubes (TNT) anchored nanoscale zero-valent iron (NZVI) nanocomposite (NZVI/TNT) was synthesized, characterized and used for the enhanced scavenging of Cr(VI) and Se(VI) from water. The structural identification indicated that NZVI was uniformly loaded on TNT, thereby, the oxidation and aggregation of NZVI was significantly minimized. The macroscopic experimental results indicated that NZVI/TNT exhibited higher efficiency as well as rate on Cr(VI) and Se(VI) scavenging resulted from the good synergistic effect between adsorption and reduction. Besides, TNT can weaken the inhibitory effect of co-existing humic acid (HA) and fulvic acid (FA) on the scavenging of Cr(VI) and Se(VI) by NZVI, since TNT showed strong adsorption for HA and FA that inhibit potential reactivity. XPS analysis suggested that surface-bound Fe(II) played a critical role in Cr(VI) and Se(VI) scavenging. XANES analysis demonstrated that TNT acted as a promoter for the almost complete transformation of Cr(VI) into Cr(III), and Se(VI) into Se(0)/Se(-II) in NZVI system. EXAFS analysis indicated that TNT acted as a scavenger for insoluble products, and thus more reactive sites can be used for Cr(VI) and Se(VI) reduction. The excellent performance of NZVI/TNT provide a potential material for purification and detoxification of Cr(VI) and Se(VI) from wastewater. (C) 2017 Elsevier B.V. All rights reserved.