Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

Abstract Passivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexav...

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Autores principales:	Jien Ye, Yi Wang, Qiao Xu, Hanxin Wu, Jianhao Tong, Jiyan Shi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6f00266d48d44eec9fa4757c6497311b
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spelling	oai:doaj.org-article:6f00266d48d44eec9fa4757c6497311b2021-12-02T16:53:11ZRemoval of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles10.1038/s41598-021-90414-02045-2322https://doaj.org/article/6f00266d48d44eec9fa4757c6497311b2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90414-0https://doaj.org/toc/2045-2322Abstract Passivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.Jien YeYi WangQiao XuHanxin WuJianhao TongJiyan ShiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jien Ye Yi Wang Qiao Xu Hanxin Wu Jianhao Tong Jiyan Shi Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
description	Abstract Passivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.
format	article
author	Jien Ye Yi Wang Qiao Xu Hanxin Wu Jianhao Tong Jiyan Shi
author_facet	Jien Ye Yi Wang Qiao Xu Hanxin Wu Jianhao Tong Jiyan Shi
author_sort	Jien Ye
title	Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
title_short	Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
title_full	Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
title_fullStr	Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
title_full_unstemmed	Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles
title_sort	removal of hexavalent chromium from wastewater by cu/fe bimetallic nanoparticles
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6f00266d48d44eec9fa4757c6497311b
work_keys_str_mv	AT jienye removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles AT yiwang removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles AT qiaoxu removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles AT hanxinwu removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles AT jianhaotong removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles AT jiyanshi removalofhexavalentchromiumfromwastewaterbycufebimetallicnanoparticles
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Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

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