@article{00d025fa2b4e46c4a4c7eaa2d0279678,
title = "Ultrasound-assisted catalytic reduction of Cr(VI) by an acid mine drainage based nZVI coupling with FeS2 system from aqueous solutions: Performance and mechanism",
abstract = "Nowadays, nanoscale zero valent iron (nZVI) has been extensively applied for the decontamination of various pollutants, but passivation of nZVI severely affects its reactivity in use. In this study, ultrasound (US)-assisted catalytic reduction of Cr(VI) by an acid mine drainage based nZVI (AMD-nZVI) coupling with FeS2 system was systematically examined. Results show that the presence of FeS2 and US induced a synergistic enhancement of Cr(VI) removal by AMD-nZVI. Nearly 98% of Cr(VI) removal was achieved by AMD-nZVI/FeS2/US process within 60 min under optimal reaction conditions. Several coexisting substances with lower concentration including Pb(II), Ni(II), bisphenol A (BPA) and 2,4-diclorophenol (2,4-DCP) could be effectively removed in simultaneous manner with Cr(VI) removal. The inhibitory order of water matrix species on Cr(VI) removal was NO3− > PO43− > HCO3− > Ca2+ > Mg2+ > Cl−, and a serious suppression effect was induced by humic acid (HA). Addition of ethylene diamine tetra-acetic acid (EDTA) and citric acid (CA) could enhance Cr(VI) removal rate. An enhanced reaction mechanism was proposed, which involved the regeneration of more Fe2+ and H+ by AMD-nZVI/FeS2/US process, leading to the reduction of Cr(VI) by AMD-nZVI and FeS2 into Cr(III) species inculding Cr2O3 and Cr(OH)3. This study well demonstrates that AMD-nZVI/FeS2/US process is considered as a potential candidate for the remediation of Cr(VI) in real wasterwater.",
keywords = "Cr(VI), Enhanced removal, FeS, nZVI, Waste utilization",
author = "Diao, {Zeng Hui} and Liu Yan and Dong, {Fu Xin} and Chen, {Zhi Liang} and Guo, {Peng Ran} and Wei Qian and Zhang, {Wen Xuan} and Liang, {Jing Yi} and Huang, {Shi Ting} and Wei Chu",
note = "Funding Information: This research was supported by Guangzhou Science and Technology Project (No. 201906010070), Hongkong Scholarship (No. XJ2018032), Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2018), Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2019KJ140) and National Natural Science Foundation of China (Nos. 21407155 and 21777150), the Project of Educational Commission of Guangdong Province of China (No. 2019KTSCX067), Guangdong University Student Science and Technology Innovation Cultivation Special Fund (No. pdjh2020b0289), National Key R&D Program of China (Nos. 2017YFD0801305 and 2019YFC1805305), Key R&D Program of Guangdong Province, China (No. 2019B110207001), Natural Science Foundation of Guangdong Province (Nos. 2017A030313245 and 2019A1515012131) and Science and Technology Planning Key Project of Guangdong Province (No. 2017B020203001) and Project of Water Resource Department of Guangdong Province (No. 2017-18). Funding Information: This research was supported by Guangzhou Science and Technology Project (No. 201906010070 ), Hongkong Scholarship (No. XJ2018032 ), Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (2018), Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams (No. 2019KJ140 ) and National Natural Science Foundation of China (Nos. 21407155 and 21777150 ), the Project of Educational Commission of Guangdong Province of China (No. 2019KTSCX067 ), Guangdong University Student Science and Technology Innovation Cultivation Special Fund (No. pdjh2020b0289 ), National Key R&D Program of China (Nos. 2017YFD0801305 and 2019YFC1805305 ), Key R&D Program of Guangdong Province, China (No. 2019B110207001 ), Natural Science Foundation of Guangdong Province (Nos. 2017A030313245 and 2019A1515012131 ) and Science and Technology Planning Key Project of Guangdong Province (No. 2017B020203001 ) and Project of Water Resource Department of Guangdong Province (No. 2017-18 ). Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2021",
month = jan,
day = "15",
doi = "10.1016/j.jenvman.2020.111518",
language = "English",
volume = "278",
journal = "Journal of Environmental Management",
issn = "0301-4797",
publisher = "Academic Press Inc.",
}