Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal

doi:10.1016/j.chemosphere.2021.130820

	Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal
	Qu, Min 1,2,3,4; Chen, Huixia 1,3,4; Wang, Yuan 1,3,4; Wang, Xingrun 5; Tong, Xuejiao 6; Li, Shupeng 7; Xu, Hongbin 1,2,3,4
刊名	CHEMOSPHERE
	2021-10-01
卷号	281 页码:8
关键词	Cr(VI) removal Zero-valent iron Chemical modification Sulfidation Groundwater
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2021.130820
英文摘要	The reactivity of zero-valent iron (ZVI) for the Cr(VI) removal in groundwater is mainly limited by the formation of a passivation layer during its application in permeable reactive barrier (PRB). A kind of sulfidated copper-iron bimetal (S-ZVICu) with high reactivity for Cr(VI) removal was prepared by depositing FeSx onto copper modified ZVI via a one-pot method. The surface characteristic, reactivity and Cr(VI) removal performance of S-ZVICu were investigated. It was found that S-ZVICu had a Cr(VI) removal capacity as high as 67.5 mg/g and little risk of secondary contaminant of Cu(II). The optimal Cu/Fe mass ratio and S/Fe molar ratio were 0.0125 and 0.084, respectively. The S-ZVICu exhibited great superiority of Cr(VI) removal compared with ZVI, sulfidated ZVI (SZVI) and coper-iron bimetal (ZVICu). Mineralogy and morphology analysis showed that S-ZVICu had a hierarchical structure of Fe-0/Cu-0/FeSx, which could effectively reduce the risk of secondary contaminant of copper ions. The mechanism analysis suggested that the copper and FeSx successively plated on the surface of ZVI played a dual role in promoting the corrosion of zero-valent iron, and was facilitated to electron transfer between Fe-0, Cu-0, FeSx and Cr(VI). In addition, the loose FeSx layer had a positive effect on alleviating the oxidation of ZVI in air, which was helpful in maintaining the reactivity of S-ZVICu in the air. S-ZVICu is an environmentally friendly material for sustainable and effective removal of Cr(VI) in groundwater.
WOS关键词	P-NITROPHENOL PNP ; ZEROVALENT IRON ; CHROMIUM(VI) REMOVAL ; HEXAVALENT CHROMIUM ; PARTICLES ; GROUNDWATER ; REDUCTION ; CHROMATE ; SEQUESTRATION ; NANOPARTICLES
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000665491400050
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49409]
专题	中国科学院过程工程研究所
通讯作者	Chen, Huixia
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 5.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 6.Yuhuan Environm Technol Co LTD, Shijiazhuang 050091, Hebei, Peoples R China 7.Beijing Construct Engn Grp Environm Remediat Co L, Beijing 100015, Peoples R China
推荐引用方式 GB/T 7714	Qu, Min,Chen, Huixia,Wang, Yuan,et al. Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal[J]. CHEMOSPHERE,2021,281:8.
APA	Qu, Min.,Chen, Huixia.,Wang, Yuan.,Wang, Xingrun.,Tong, Xuejiao.,...&Xu, Hongbin.(2021).Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal.CHEMOSPHERE,281,8.
MLA	Qu, Min,et al."Improved performance and applicability of copper-iron bimetal by sulfidation for Cr(VI) removal".CHEMOSPHERE 281(2021):8.