Adsorption of Toxic Selenium Oxoanions on Surface-Modified Kaolins

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  • L. Herzogová Department of Solid State Chemistry,
  • B. Doušová Department of Solid State Chemistry,
  • M. Lhotka Department of Inorganic Chemistry,
  • V. Machovič Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic
  • J. Schweigstillová Institute of Rock Structure and Mechanics, Academy of Sciences of the Czech Republic
  • D. Koloušek Department of Solid State Chemistry,

Abstrakt

Se is a trace element and an important micronutrient. At higher concentrations it may become a serious threat for the environment and human health. Se occurs in nature in organic or inorganic compounds (SeO32, SeO42). The toxic compounds can be removed from water by adsorption on aluminosilicates (kaolins, bentonites, zeolites). The aim of this work was the preparation of new low-cost sorbents based on kaolins and determination of their stabi¬lity. The adsorbents were prepared by treatment of kaolin with Fe2+ or Al3+ solution yielding mesoporous amorphous FeIII or AlIII oxides/hydroxides. The obtained materials were selective adsorbents of SeIV in water. The batch sorption was performed with 101500 mg l1 aqueous Se solutions and evaluated using a Langmuir model. The removal of Se using the Al-treated kaolin was more effective than its Fe analog.

Publikováno

15.09.2012

Jak citovat

Herzogová, L., Doušová, B., Lhotka, M., Machovič, V., Schweigstillová, J., & Koloušek, D. (2012). Adsorption of Toxic Selenium Oxoanions on Surface-Modified Kaolins. Chemické Listy, 106(8). Získáno z http://ww.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/872

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