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FeOOH and Mn8O10Cl3 modified zeolites for As(V) removal in aqueous medium
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Linnaeus University. (Environmental science and engineering)ORCID iD: 55583010900
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. Linnaeus University. (Environmental science and engineering)ORCID iD: 55583010900
2017 (English)In: Journal of chemical technology and biotechnology (1986), ISSN 0268-2575, E-ISSN 1097-4660Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Arsenic in drinking water poses serious potential health risks in more than 30 countries with total affectedpopulation of around 100 million people. The present study is devoted to the development of innovative sorbents based onzeolite materials for As(V) sorption by modifying raw materials with iron oxyhydroxide and manganese oxychloride. Naturalclinoptilolite and synthetic zeolite A were modified in order to obtain improved sorption of As(V). Sorption properties of newlydeveloped sorbents were studied. Zeolites containing natural clinoptilolite are chosen due to relatively low cost and their broaduse in industrial production as well as characteristic large surface area.RESULTS: Results obtained indicate that modification of zeolites with FeOOH and Mn8O10Cl3significantly improves the As(V)sorption capacit y of newly developed materials. As(V) sorption on FeOOH-modified aluminosilicates follows the Langmuirmodel, while on unmodified aluminosilicates it is described by the Freundlich model. As(V) sorption kinetics on both modifiedand unmodified materials most precisely can be described by Lagergren’s pseudo-second-order kinetic model. Elevated As(V)concentration on the surface of Mn8O10Cl3crystals and amorphous FeOOH indicates these compounds as responsible forsorption increase.CONCLUSION: Developed sorbents show improved performance in comparison with their unmodified counterparts, with adramatic increase in As(V) sorption capacity up to 99.3 times in the c ase of FeOOH-modified calcium zeolite A. These materialshave great potential for As(V) removal in aqueous medium.

Place, publisher, year, edition, pages
2017.
Keyword [en]
zeolites; adsorption; environmental remediation; equilibrium; kinetics; heavy metals
National Category
Engineering and Technology
Research subject
Chemistry, Analytical Chemistry; Chemistry, Physical Chemistry; Environmental Science, Environmental Chemistry; Environmental Science, Environmental technology
Identifiers
URN: urn:nbn:se:lnu:diva-64719DOI: 10.1002/jctb.5283OAI: oai:DiVA.org:lnu-64719DiVA: diva2:1105240
Note

Full Authors List: Andrejs Krauklis,Ruta Ozola,Juris Burlakovs,Kristine Rugele,Kirill Kirillov,Anna Trubaca-Boginska,Kristaps Rubenis,Valentina Stepanova and Maris Klavins

Available from: 2017-06-02 Created: 2017-06-02 Last updated: 2017-06-02

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