Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors

Heavy metal pollution of soil restricts the sustainable use of land and poses risks to human health throughout the world. Changes in the physicochemical properties of soil may increase the mobility of heavy metals in the soil ecosystem and lead to groundwater pollution. In this study, the effects of...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Nengzhan Zheng, Weifeng Yue, Jin Wu, Kaixuan Hou, Lijun Wu, Mengshen Guo, Yanguo Teng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Cd batch desorption test salt stress principal component analysis soil pollution Agriculture S
Acceso en línea:	https://doaj.org/article/1acb0e96ec674f4295e34b8634f8f39a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1acb0e96ec674f4295e34b8634f8f39a
record_format	dspace
spelling	oai:doaj.org-article:1acb0e96ec674f4295e34b8634f8f39a2021-11-25T16:05:20ZResponses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors10.3390/agronomy111121752073-4395https://doaj.org/article/1acb0e96ec674f4295e34b8634f8f39a2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2175https://doaj.org/toc/2073-4395Heavy metal pollution of soil restricts the sustainable use of land and poses risks to human health throughout the world. Changes in the physicochemical properties of soil may increase the mobility of heavy metals in the soil ecosystem and lead to groundwater pollution. In this study, the effects of different salt solutions (NaCl, CaCl<sub>2</sub>, NaNO<sub>3</sub>, MgCl<sub>2</sub>, Na<sub>2</sub>SO<sub>4</sub>, and mixed salts) on the release of Cd from soil were investigated by batch desorption tests and the Freundlich isothermal sorption model. Increased concentrations of the salts, except for NaNO<sub>3</sub>, significantly promoted Cd release (<i>R</i><sup>2</sup> > 0.9, <i>p</i> < 0.01). Under the salt stress, Cd release from the test soils was promoted more by CaCl<sub>2</sub> and MgCl<sub>2</sub> than by the other salts, and the average desorption rates of eight soil samples at 3.5% salt concentration were 11.15% and 10.80%, respectively, which were much higher than those of NaCl (4.05%), Na<sub>2</sub>SO<sub>4</sub> (0.41%), and NaNO<sub>3</sub> (0.33%). Ca<sup>2+</sup> and Mg<sup>2+</sup> showed better ion exchange capacity than Na<sup>+</sup> to promote Cd release; for anions, Cl<sup>−</sup> formed hydrophilic Cd chloride complexes with Cd in soil. In addition, principal component analysis results revealed that Cd release was mainly influenced by soil texture, cation exchange capacity, and iron–manganese oxide content of the soil. The Cd release level for different soil samples was most closely related to the proportion of fine particles in the soil. The higher the clay content was, the higher the Cd desorption rate.Nengzhan ZhengWeifeng YueJin WuKaixuan HouLijun WuMengshen GuoYanguo TengMDPI AGarticleCdbatch desorption testsalt stressprincipal component analysissoil pollutionAgricultureSENAgronomy, Vol 11, Iss 2175, p 2175 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cd batch desorption test salt stress principal component analysis soil pollution Agriculture S
spellingShingle	Cd batch desorption test salt stress principal component analysis soil pollution Agriculture S Nengzhan Zheng Weifeng Yue Jin Wu Kaixuan Hou Lijun Wu Mengshen Guo Yanguo Teng Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
description	Heavy metal pollution of soil restricts the sustainable use of land and poses risks to human health throughout the world. Changes in the physicochemical properties of soil may increase the mobility of heavy metals in the soil ecosystem and lead to groundwater pollution. In this study, the effects of different salt solutions (NaCl, CaCl<sub>2</sub>, NaNO<sub>3</sub>, MgCl<sub>2</sub>, Na<sub>2</sub>SO<sub>4</sub>, and mixed salts) on the release of Cd from soil were investigated by batch desorption tests and the Freundlich isothermal sorption model. Increased concentrations of the salts, except for NaNO<sub>3</sub>, significantly promoted Cd release (<i>R</i><sup>2</sup> > 0.9, <i>p</i> < 0.01). Under the salt stress, Cd release from the test soils was promoted more by CaCl<sub>2</sub> and MgCl<sub>2</sub> than by the other salts, and the average desorption rates of eight soil samples at 3.5% salt concentration were 11.15% and 10.80%, respectively, which were much higher than those of NaCl (4.05%), Na<sub>2</sub>SO<sub>4</sub> (0.41%), and NaNO<sub>3</sub> (0.33%). Ca<sup>2+</sup> and Mg<sup>2+</sup> showed better ion exchange capacity than Na<sup>+</sup> to promote Cd release; for anions, Cl<sup>−</sup> formed hydrophilic Cd chloride complexes with Cd in soil. In addition, principal component analysis results revealed that Cd release was mainly influenced by soil texture, cation exchange capacity, and iron–manganese oxide content of the soil. The Cd release level for different soil samples was most closely related to the proportion of fine particles in the soil. The higher the clay content was, the higher the Cd desorption rate.
format	article
author	Nengzhan Zheng Weifeng Yue Jin Wu Kaixuan Hou Lijun Wu Mengshen Guo Yanguo Teng
author_facet	Nengzhan Zheng Weifeng Yue Jin Wu Kaixuan Hou Lijun Wu Mengshen Guo Yanguo Teng
author_sort	Nengzhan Zheng
title	Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
title_short	Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
title_full	Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
title_fullStr	Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
title_full_unstemmed	Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors
title_sort	responses of soil cadmium desorption under different saline environments and its controlling factors
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/1acb0e96ec674f4295e34b8634f8f39a
work_keys_str_mv	AT nengzhanzheng responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT weifengyue responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT jinwu responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT kaixuanhou responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT lijunwu responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT mengshenguo responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors AT yanguoteng responsesofsoilcadmiumdesorptionunderdifferentsalineenvironmentsanditscontrollingfactors
_version_	1718413302559670272

Responses of Soil Cadmium Desorption under Different Saline Environments and Its Controlling Factors

Ejemplares similares