Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)

Abstract Ternary zinc-nickel-aluminum hydrotalcites (ZnNiAl-LDHs) were prepared by hydrothermal synthesis. The structure and morphology of the materials were characterized using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen ads...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yanquan Ouyang, Yuanxin Xu, Limei Zhao, Mingzhan Deng, Pengfei Yang, Guowen Peng, Guojun Ke
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7ef8926fc8c64054a798010fa6337d9a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7ef8926fc8c64054a798010fa6337d9a
record_format	dspace
spelling	oai:doaj.org-article:7ef8926fc8c64054a798010fa6337d9a2021-11-08T10:48:31ZPreparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)10.1038/s41598-021-01133-52045-2322https://doaj.org/article/7ef8926fc8c64054a798010fa6337d9a2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01133-5https://doaj.org/toc/2045-2322Abstract Ternary zinc-nickel-aluminum hydrotalcites (ZnNiAl-LDHs) were prepared by hydrothermal synthesis. The structure and morphology of the materials were characterized using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen adsorption–desorption (BET) and other test techniques. ZnNiAl-LDHs was applied in the treatment of uranium-containing wastewater, the effects of initial pH of the solution, adsorption temperature and contact time on its adsorption performance were systematically investigated, and the adsorption performance of ZnNiAl-LDHs and ZnAl-LDHs on uranyl ions were compared. The result showed that ZnNiAl-LDHs were 3D microspheres self-assembled from flakes, with a specific surface area of 102.02 m2/g, which was much larger than that of flake ZnAl-LDHs (18.49 m2/g), and the saturation adsorption capacity of ZnNiAl-LDHs for uranyl ions (278.26 mg/g) was much higher than that of ZnAl-LDHs for uranyl ions (189.16 mg/g), so the ternary ZnNiAl-LDHs had a more excellent adsorption capacity. In addition, kinetic and thermodynamic studies showed that the adsorption process of ZnNiAl-LDHs on uranyl ions conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. The positive value of ΔH and the negative value of ΔG indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism was analyzed by X-ray energy spectroscopy (EDS), fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that the adsorption of uranyl ions by ZnNiAl-LDHs mainly consisted of complexation and ion substitution. The research results prove that ZnNiAl-LDHs is an adsorbent with low cost and excellent performance, and it has a good application prospect in the field of uranium-containing wastewater treatment.Yanquan OuyangYuanxin XuLimei ZhaoMingzhan DengPengfei YangGuowen PengGuojun KeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yanquan Ouyang Yuanxin Xu Limei Zhao Mingzhan Deng Pengfei Yang Guowen Peng Guojun Ke Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
description	Abstract Ternary zinc-nickel-aluminum hydrotalcites (ZnNiAl-LDHs) were prepared by hydrothermal synthesis. The structure and morphology of the materials were characterized using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen adsorption–desorption (BET) and other test techniques. ZnNiAl-LDHs was applied in the treatment of uranium-containing wastewater, the effects of initial pH of the solution, adsorption temperature and contact time on its adsorption performance were systematically investigated, and the adsorption performance of ZnNiAl-LDHs and ZnAl-LDHs on uranyl ions were compared. The result showed that ZnNiAl-LDHs were 3D microspheres self-assembled from flakes, with a specific surface area of 102.02 m2/g, which was much larger than that of flake ZnAl-LDHs (18.49 m2/g), and the saturation adsorption capacity of ZnNiAl-LDHs for uranyl ions (278.26 mg/g) was much higher than that of ZnAl-LDHs for uranyl ions (189.16 mg/g), so the ternary ZnNiAl-LDHs had a more excellent adsorption capacity. In addition, kinetic and thermodynamic studies showed that the adsorption process of ZnNiAl-LDHs on uranyl ions conformed to the pseudo-second-order kinetic model and Langmuir isotherm model. The positive value of ΔH and the negative value of ΔG indicated that the adsorption process was endothermic and spontaneous. The adsorption mechanism was analyzed by X-ray energy spectroscopy (EDS), fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that the adsorption of uranyl ions by ZnNiAl-LDHs mainly consisted of complexation and ion substitution. The research results prove that ZnNiAl-LDHs is an adsorbent with low cost and excellent performance, and it has a good application prospect in the field of uranium-containing wastewater treatment.
format	article
author	Yanquan Ouyang Yuanxin Xu Limei Zhao Mingzhan Deng Pengfei Yang Guowen Peng Guojun Ke
author_facet	Yanquan Ouyang Yuanxin Xu Limei Zhao Mingzhan Deng Pengfei Yang Guowen Peng Guojun Ke
author_sort	Yanquan Ouyang
title	Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
title_short	Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
title_full	Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
title_fullStr	Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
title_full_unstemmed	Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)
title_sort	preparation of znnial-ldhs microspheres and their adsorption behavior and mechanism on u(vi)
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/7ef8926fc8c64054a798010fa6337d9a
work_keys_str_mv	AT yanquanouyang preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT yuanxinxu preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT limeizhao preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT mingzhandeng preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT pengfeiyang preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT guowenpeng preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi AT guojunke preparationofznnialldhsmicrospheresandtheiradsorptionbehaviorandmechanismonuvi
_version_	1718442631757824000

Preparation of ZnNiAl-LDHs microspheres and their adsorption behavior and mechanism on U(VI)

Ejemplares similares