文献类型：期刊文献

英文题名：Spectroscopic investigation of Cr(VI) sorption on nZVI/biochar composites

作者：Xu, Min[1,2];Ma, Xiaoli[1];Chen, Yahui[1];Hu, Luzeng[1];Wang, Bo[1];Qiu, Muqing[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China;[2]Zhejiang Zhongguanheng Testing Technol Co Ltd, Shaoxing 311899, Zhuji, Peoples R China

年份：2022

卷号：366

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：SCI-EXPANDED(收录号：WOS:000861040400007)、、EI(收录号：20223712734227)、Scopus(收录号：2-s2.0-85137724996)、WOS

基金：Financial supported from Natural Science Foundation of Zhe- jiang Province, China (No. LGF20C030001) are acknowledged.

语种：英文

外文关键词：Cr(VI); nZVI; Biochar; Synchrotron radiation; Environmental remediation

外文摘要：Nanoscale zero-valent iron/biochar (nZVI/biochar) has been widely utilized in environmental remedia-tion due to its excellent removal efficiency, easy synthesis, low-cost and environmental friendliness. Herein, the removal and interaction mechanism of Cr(VI) removal on nZVI/biochar was investigated by macroscopic and microscopic techniques. Compared to nZVI (25.84 mg/g), the high removal capacity (63.29 mg/g at pH 4.5), excellent reusability and chemical stability of nZVI/biochar were due to various oxygen-bearing functional groups and synergetic interaction. According to analysis of X-ray photoelec-tron spectroscopy (XPS), X-ray absorption near-edge fine (XANES) and extended X-ray absorption fine structure (EXAFS) spectra, the interaction mechanism of Cr(VI) on nZVI/biochar followed adsorption (complexation, electrostatic interaction), reduction and co-precipitation process with increasing reaction time. These findings are crucial for the application of nZVI/biochar for removal of heavy metals in actual environmental cleanup.(c) 2022 Elsevier B.V. All rights reserved.