Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies

To improve the adsorption efficiency of layered double hydroxides (LDHs) for heavy metals, a novel sodium alginate (SA) intercalated MgAl-LDH (SA-LDH) was synthesized in this work. SA-LDH was characterized by XRD, FTIR, XPS and employed as adsorbent for Cd(II), Pb(II), Cu(II) elimination. Adsorbent...

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Autores principales:	Xue Zhang, Ranran Shan, Xuguang Li, Liangguo Yan, Zhenmin Ma, Ruibao Jia, Shaohua Sun
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption mechanisms heavy metal removal kinetics and isotherms sodium alginate wastewater treatment Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/4fd1497090e94bc6a70f81c49bf66f19
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spelling	oai:doaj.org-article:4fd1497090e94bc6a70f81c49bf66f192021-11-06T10:48:19ZEffective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies0273-12231996-973210.2166/wst.2021.013https://doaj.org/article/4fd1497090e94bc6a70f81c49bf66f192021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/4/975https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732To improve the adsorption efficiency of layered double hydroxides (LDHs) for heavy metals, a novel sodium alginate (SA) intercalated MgAl-LDH (SA-LDH) was synthesized in this work. SA-LDH was characterized by XRD, FTIR, XPS and employed as adsorbent for Cd(II), Pb(II), Cu(II) elimination. Adsorbent dosage, initial pH and contact time, which are regarded as several key parameters, were optimized. The results showed that SA-LDH exhibited better adsorption performance compared with the pristine MgAl-LDH. The maximum adsorption capacities of SA-LDH for Cu(II), Pb(II) and Cd(II) reached 0.945, 1.176 and 0.850 mmol/g, respectively. The possible mechanisms were analyzed by XPS, XRD and FTIR. The results showed that Cd(II), Pb(II) and Cu(II) may be removed by SA-LDH via (i) bonding or complexation with Sur-OH or Sur-O- of SA-LDH, (ii) precipitation of metal hydroxides or carbonates, (iii) isomorphic substitution, and (iv) chelation with −COO− in the interlayers. This work provides an effective method for the development of LDH-based adsorbent and the treatment of wastewater containing heavy metals.Xue ZhangRanran ShanXuguang LiLiangguo YanZhenmin MaRuibao JiaShaohua SunIWA Publishingarticleadsorption mechanismsheavy metal removalkinetics and isothermssodium alginatewastewater treatmentEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 4, Pp 975-984 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption mechanisms heavy metal removal kinetics and isotherms sodium alginate wastewater treatment Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption mechanisms heavy metal removal kinetics and isotherms sodium alginate wastewater treatment Environmental technology. Sanitary engineering TD1-1066 Xue Zhang Ranran Shan Xuguang Li Liangguo Yan Zhenmin Ma Ruibao Jia Shaohua Sun Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
description	To improve the adsorption efficiency of layered double hydroxides (LDHs) for heavy metals, a novel sodium alginate (SA) intercalated MgAl-LDH (SA-LDH) was synthesized in this work. SA-LDH was characterized by XRD, FTIR, XPS and employed as adsorbent for Cd(II), Pb(II), Cu(II) elimination. Adsorbent dosage, initial pH and contact time, which are regarded as several key parameters, were optimized. The results showed that SA-LDH exhibited better adsorption performance compared with the pristine MgAl-LDH. The maximum adsorption capacities of SA-LDH for Cu(II), Pb(II) and Cd(II) reached 0.945, 1.176 and 0.850 mmol/g, respectively. The possible mechanisms were analyzed by XPS, XRD and FTIR. The results showed that Cd(II), Pb(II) and Cu(II) may be removed by SA-LDH via (i) bonding or complexation with Sur-OH or Sur-O- of SA-LDH, (ii) precipitation of metal hydroxides or carbonates, (iii) isomorphic substitution, and (iv) chelation with −COO− in the interlayers. This work provides an effective method for the development of LDH-based adsorbent and the treatment of wastewater containing heavy metals.
format	article
author	Xue Zhang Ranran Shan Xuguang Li Liangguo Yan Zhenmin Ma Ruibao Jia Shaohua Sun
author_facet	Xue Zhang Ranran Shan Xuguang Li Liangguo Yan Zhenmin Ma Ruibao Jia Shaohua Sun
author_sort	Xue Zhang
title	Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
title_short	Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
title_full	Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
title_fullStr	Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
title_full_unstemmed	Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies
title_sort	effective removal of cu(ii), pb(ii) and cd(ii) by sodium alginate intercalated mgal-layered double hydroxide: adsorption properties and mechanistic studies
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/4fd1497090e94bc6a70f81c49bf66f19
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Effective removal of Cu(II), Pb(II) and Cd(II) by sodium alginate intercalated MgAl-layered double hydroxide: adsorption properties and mechanistic studies

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