Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution

Layered double hydroxides (LDH) are anionic clays, mainly used as adsorbents, ion exchange material, and catalysts. Generally, they present high specific surface areas, alkaline character, high metallic dispersion, and high thermal stability. If they contain a transitional element in their structure...

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Autores principales:	María Martha Barroso Quiroga, Mònica Iglesias Juncà, Nora Andrea Merino
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	as(iii) as(v) ldh mgal mgfe Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/596b50c33ff6437180c9493cf35bd602
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spelling	oai:doaj.org-article:596b50c33ff6437180c9493cf35bd6022021-11-06T11:05:41ZStudy of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution0273-12231996-973210.2166/wst.2021.153https://doaj.org/article/596b50c33ff6437180c9493cf35bd6022021-05-01T00:00:00Zhttp://wst.iwaponline.com/content/83/10/2518https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Layered double hydroxides (LDH) are anionic clays, mainly used as adsorbents, ion exchange material, and catalysts. Generally, they present high specific surface areas, alkaline character, high metallic dispersion, and high thermal stability. If they contain a transitional element in their structure, the solid may present redox properties. LDH were synthesized with the following combinations: MgAl, MgFe, and ZnMgFe, aiming to determine the effect of cationic nature in the structure and the functionality of the synthesized clay as adsorbents in polluted aqueous effluents. The textural properties were determined by nitrogen adsorption isotherms. Crystalline structure was studied by XRD and the presence of the anions of the interlayer was determined by FTIR spectroscopy. The studies of removal of As(III) and As(V) from aqueous solutions, using the LDH, show that after 24 h the solids reach a high removal efficiency. ZnMgFe solid removed both species of arsenic with values of 95 and 98% for As(II) and As(V), respectively. The MgFe solid showed some selectivity to the uptake of As(V), while the MgAl only removed As(V). This selective behaviour can be beneficial in studies of arsenic speciation. HIGHLIGHTS Al and Fe present different electrostatic interactions which modify the LDH activity.; The different chemical behaviour of the constituent metals has influenced the morphology.; The solids present more than 88% of removal of As(V) in less than 24 h.; MgAl mostly removed As(V).; ZnMgFe had an excellent performance for both arsenic species.;María Martha Barroso QuirogaMònica Iglesias JuncàNora Andrea MerinoIWA Publishingarticleas(iii)as(v)ldhmgalmgfeEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 10, Pp 2518-2525 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	as(iii) as(v) ldh mgal mgfe Environmental technology. Sanitary engineering TD1-1066
spellingShingle	as(iii) as(v) ldh mgal mgfe Environmental technology. Sanitary engineering TD1-1066 María Martha Barroso Quiroga Mònica Iglesias Juncà Nora Andrea Merino Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
description	Layered double hydroxides (LDH) are anionic clays, mainly used as adsorbents, ion exchange material, and catalysts. Generally, they present high specific surface areas, alkaline character, high metallic dispersion, and high thermal stability. If they contain a transitional element in their structure, the solid may present redox properties. LDH were synthesized with the following combinations: MgAl, MgFe, and ZnMgFe, aiming to determine the effect of cationic nature in the structure and the functionality of the synthesized clay as adsorbents in polluted aqueous effluents. The textural properties were determined by nitrogen adsorption isotherms. Crystalline structure was studied by XRD and the presence of the anions of the interlayer was determined by FTIR spectroscopy. The studies of removal of As(III) and As(V) from aqueous solutions, using the LDH, show that after 24 h the solids reach a high removal efficiency. ZnMgFe solid removed both species of arsenic with values of 95 and 98% for As(II) and As(V), respectively. The MgFe solid showed some selectivity to the uptake of As(V), while the MgAl only removed As(V). This selective behaviour can be beneficial in studies of arsenic speciation. HIGHLIGHTS Al and Fe present different electrostatic interactions which modify the LDH activity.; The different chemical behaviour of the constituent metals has influenced the morphology.; The solids present more than 88% of removal of As(V) in less than 24 h.; MgAl mostly removed As(V).; ZnMgFe had an excellent performance for both arsenic species.;
format	article
author	María Martha Barroso Quiroga Mònica Iglesias Juncà Nora Andrea Merino
author_facet	María Martha Barroso Quiroga Mònica Iglesias Juncà Nora Andrea Merino
author_sort	María Martha Barroso Quiroga
title	Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
title_short	Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
title_full	Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
title_fullStr	Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
title_full_unstemmed	Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution
title_sort	study of the effect of the ldh cations precursors in the removal of arsenic in aqueous solution
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/596b50c33ff6437180c9493cf35bd602
work_keys_str_mv	AT mariamarthabarrosoquiroga studyoftheeffectoftheldhcationsprecursorsintheremovalofarsenicinaqueoussolution AT monicaiglesiasjunca studyoftheeffectoftheldhcationsprecursorsintheremovalofarsenicinaqueoussolution AT noraandreamerino studyoftheeffectoftheldhcationsprecursorsintheremovalofarsenicinaqueoussolution
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Study of the effect of the LDH cations precursors in the removal of arsenic in aqueous solution

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