文献类型：期刊文献

英文题名：Kinetics Studies on Toxic Hexavalent Chromium Removal from Aqueous Solutions by Magnetic Nano-Magnetite

作者：Wang, Q.[1]; Liang, L.P.[1]; Xi, F.F.[1]; Wu, Q.[1]; Xue, Y.Y.[1]; Cheng, L.B.[1]; Zhang, Y.T.[1]; Meng, X.[2]

机构：[1] School of Civil Engineering, College of Life Science, Shaoxing University, Shaoxing, 312000, China; [2] Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province, Shaoxing University, Shaoxing, 312000, China

年份：2021

卷号：20

期号：1

起止页码：203

外文期刊名：Nature Environment and Pollution Technology

收录：EI(收录号：20211310150226)、Scopus(收录号：2-s2.0-85103234683)

基金：The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (Grant No. 41807468), Zhejiang Provincial Natural Science Foundation of China (Grant No. LY18E080018), Shaoxing Public Welfare Project (Grant No. 2017B70042), State Key Laboratory of Pollution Control and Resource Reuse Foundation (Grant No. PCRRF18021).

语种：英文

外文关键词：Adsorption - Chemicals removal (water treatment) - Iron oxides - Kinetics - Magnetism - Magnetite - Precipitation (chemical)

外文摘要：In this study, the chemical co-precipitation method was used to prepare magnetic nano-Fe3O4. In order to investigate the adsorption capacity of magnetic nano-Fe3O4 for Cr(VI) in aqueous solution, three aspects of solution pH, magnetic nano-Fe3O4 dosage and initial solution concentration were studied. The experimental results showed that Cr(VI) adsorption capacity by magnetic nano-Fe3O4 decreased with increasing pH and increased with the increasing initial concentration of Cr(VI) ions and magnetic nano-Fe3O4 dosage. In addition, the experimental data were fitted to the adsorption kinetics and three adsorption isotherms. It could be seen that the adsorption process of Cr(VI) by magnetic nano-Fe3O4 accorded with pseudo-second-order kinetics, which demonstrated that the adsorption process was controlled by chemical adsorption. And it was also found to be well represented by the Freundlich isotherm model. The maximum capacity obtained from the Langmuir model was 34.0136 mg/g, indicating that magnetic nano-Fe3O4 is an efficient adsorbent. ? 2021 Technoscience Publications. All rights reserved.