Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

Abstract Green routes for remediation of heavy metals are worldwide challenges to overcome pollution problems on one hand and control the adverse impact of chemicals on the other hand. Biosorption is one of the most effective methods for removing lower level of heavy metals. The idea to apply natura...

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Autores principales:	Eman A. Assirey, Shadia M. Sirry, Hayfaa A. Burkani, Medhat A. Ibrahim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/757c8b22d24e44659a18de1777ad5500
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spelling	oai:doaj.org-article:757c8b22d24e44659a18de1777ad55002021-12-02T15:10:24ZModified Ziziphus spina-christi stones as green route for the removal of heavy metals10.1038/s41598-020-76810-y2045-2322https://doaj.org/article/757c8b22d24e44659a18de1777ad55002020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-76810-yhttps://doaj.org/toc/2045-2322Abstract Green routes for remediation of heavy metals are worldwide challenges to overcome pollution problems on one hand and control the adverse impact of chemicals on the other hand. Biosorption is one of the most effective methods for removing lower level of heavy metals. The idea to apply natural resources as a green method for removal of heavy metals, this route has no adverse impacts on the environment. This study investigated the ability of chemically modified Ziziphus spina-christi stones (ZSCs) as agriculture by-products to perform the biosorption of Pb(II), Zn(II) and Cd(II) ions from wastewater in a single and ternary metal system. The characteristic functional groups of chemically modified ZSCs were analyzed by Fourier transform infrared. In comparison with acidic ZSCs, alkali-modified ZSCs by KOH was more effective and enhanced the removal efficiency of ZSCs. Using Langmuir isotherm, the maximum adsorption capacity on the modified ZSCs for Pb(II) was 9.06 mg/g, for Zn(II) obtained by using ZSC–citric acid was 4.19 mg/g and 5.38 mg/g for Cd(II) as obtained by using ZSC–H2O2. The molecular electrostatic potential, which was calculated at B3LYP/6-31G(d,p), indicated that each metal is di-hydrated, forming a complex with two units of amino acids. This mechanism demonstrated the uptake process by ZSCs.Eman A. AssireyShadia M. SirryHayfaa A. BurkaniMedhat A. IbrahimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Eman A. Assirey Shadia M. Sirry Hayfaa A. Burkani Medhat A. Ibrahim Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
description	Abstract Green routes for remediation of heavy metals are worldwide challenges to overcome pollution problems on one hand and control the adverse impact of chemicals on the other hand. Biosorption is one of the most effective methods for removing lower level of heavy metals. The idea to apply natural resources as a green method for removal of heavy metals, this route has no adverse impacts on the environment. This study investigated the ability of chemically modified Ziziphus spina-christi stones (ZSCs) as agriculture by-products to perform the biosorption of Pb(II), Zn(II) and Cd(II) ions from wastewater in a single and ternary metal system. The characteristic functional groups of chemically modified ZSCs were analyzed by Fourier transform infrared. In comparison with acidic ZSCs, alkali-modified ZSCs by KOH was more effective and enhanced the removal efficiency of ZSCs. Using Langmuir isotherm, the maximum adsorption capacity on the modified ZSCs for Pb(II) was 9.06 mg/g, for Zn(II) obtained by using ZSC–citric acid was 4.19 mg/g and 5.38 mg/g for Cd(II) as obtained by using ZSC–H2O2. The molecular electrostatic potential, which was calculated at B3LYP/6-31G(d,p), indicated that each metal is di-hydrated, forming a complex with two units of amino acids. This mechanism demonstrated the uptake process by ZSCs.
format	article
author	Eman A. Assirey Shadia M. Sirry Hayfaa A. Burkani Medhat A. Ibrahim
author_facet	Eman A. Assirey Shadia M. Sirry Hayfaa A. Burkani Medhat A. Ibrahim
author_sort	Eman A. Assirey
title	Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
title_short	Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
title_full	Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
title_fullStr	Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
title_full_unstemmed	Modified Ziziphus spina-christi stones as green route for the removal of heavy metals
title_sort	modified ziziphus spina-christi stones as green route for the removal of heavy metals
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/757c8b22d24e44659a18de1777ad5500
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Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

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