Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals

Nitrogen and phosphorus are commonly recognized as causing eutrophication in aquatic systems, and their transport in subsurface environments has also aroused great public attention. This research presented four natural clay minerals (NCMs) evaluated for their effectiveness of NH4+ and PO43- adsorpti...

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Autores principales:	Tingyu Fan, Miao Wang, Xingming Wang, Yingxiang Chen, Shun Wang, Hongbin Zhan, Xiaoyang Chen, Akang Lu, Shijiao Zha
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi - SAGE Publishing 2021
Materias:	Physical and theoretical chemistry QD450-801
Acceso en línea:	https://doaj.org/article/c62cd0f936eb4d3a8fed03c408a85c8b
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spelling	oai:doaj.org-article:c62cd0f936eb4d3a8fed03c408a85c8b2021-11-15T01:19:12ZExperimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals2048-403810.1155/2021/4158151https://doaj.org/article/c62cd0f936eb4d3a8fed03c408a85c8b2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/4158151https://doaj.org/toc/2048-4038Nitrogen and phosphorus are commonly recognized as causing eutrophication in aquatic systems, and their transport in subsurface environments has also aroused great public attention. This research presented four natural clay minerals (NCMs) evaluated for their effectiveness of NH4+ and PO43- adsorption from wastewater. All the NCMs were fully characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), BET analysis, and adsorption kinetics and isotherms to better understand the adsorption mechanism-property relationship. The results show that the adsorption efficiency of the four NCMs for phosphate was better than that for ammonia nitrogen. The removal rate of phosphate was higher than 65%, generally in the range of 80%-90%, while the removal rate of ammonia nitrogen was less than 50%. The adsorption kinetic behavior followed the pseudo-second-order kinetic model. The ammonia nitrogen adsorption isotherm was in good agreement with the Freundlich isotherm equilibrium model, and the phosphate adsorption isotherm matched the Langmuir model. Among all the NCMs studied, bentonite (7.13 mg/g) and kaolinite (5.37 mg/g) showed higher adsorption capacities for ammonia nitrogen, while zeolite (0.21 mg/g) and attapulgite (0.17 mg/g) showed higher adsorption capacities for phosphate. This study provides crucial baseline knowledge for the adsorption of nitrogen and phosphate by different kinds of NCMs.Tingyu FanMiao WangXingming WangYingxiang ChenShun WangHongbin ZhanXiaoyang ChenAkang LuShijiao ZhaHindawi - SAGE PublishingarticlePhysical and theoretical chemistryQD450-801ENAdsorption Science & Technology, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physical and theoretical chemistry QD450-801
spellingShingle	Physical and theoretical chemistry QD450-801 Tingyu Fan Miao Wang Xingming Wang Yingxiang Chen Shun Wang Hongbin Zhan Xiaoyang Chen Akang Lu Shijiao Zha Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
description	Nitrogen and phosphorus are commonly recognized as causing eutrophication in aquatic systems, and their transport in subsurface environments has also aroused great public attention. This research presented four natural clay minerals (NCMs) evaluated for their effectiveness of NH4+ and PO43- adsorption from wastewater. All the NCMs were fully characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), BET analysis, and adsorption kinetics and isotherms to better understand the adsorption mechanism-property relationship. The results show that the adsorption efficiency of the four NCMs for phosphate was better than that for ammonia nitrogen. The removal rate of phosphate was higher than 65%, generally in the range of 80%-90%, while the removal rate of ammonia nitrogen was less than 50%. The adsorption kinetic behavior followed the pseudo-second-order kinetic model. The ammonia nitrogen adsorption isotherm was in good agreement with the Freundlich isotherm equilibrium model, and the phosphate adsorption isotherm matched the Langmuir model. Among all the NCMs studied, bentonite (7.13 mg/g) and kaolinite (5.37 mg/g) showed higher adsorption capacities for ammonia nitrogen, while zeolite (0.21 mg/g) and attapulgite (0.17 mg/g) showed higher adsorption capacities for phosphate. This study provides crucial baseline knowledge for the adsorption of nitrogen and phosphate by different kinds of NCMs.
format	article
author	Tingyu Fan Miao Wang Xingming Wang Yingxiang Chen Shun Wang Hongbin Zhan Xiaoyang Chen Akang Lu Shijiao Zha
author_facet	Tingyu Fan Miao Wang Xingming Wang Yingxiang Chen Shun Wang Hongbin Zhan Xiaoyang Chen Akang Lu Shijiao Zha
author_sort	Tingyu Fan
title	Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
title_short	Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
title_full	Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
title_fullStr	Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
title_full_unstemmed	Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals
title_sort	experimental study of the adsorption of nitrogen and phosphorus by natural clay minerals
publisher	Hindawi - SAGE Publishing
publishDate	2021
url	https://doaj.org/article/c62cd0f936eb4d3a8fed03c408a85c8b
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Experimental Study of the Adsorption of Nitrogen and Phosphorus by Natural Clay Minerals

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