A new and practical Se(IV) removal method using Fe3+ type cation exchange resin

Daisuke Kawamoto; Yui Yamanishi; Hironori Ohashi; Kotaro Yonezu; Tetsuo Honma; Takeharu Sugiyama; Yasuhiro Kobayashi; Yoshihiro Okaue; Akane Miyazaki; Takushi Yokoyama

doi:10.1016/j.jhazmat.2019.04.076

A new and practical Se(IV) removal method using Fe³⁺ type cation exchange resin

J Hazard Mater. 2019 Oct 15:378:120593. doi: 10.1016/j.jhazmat.2019.04.076. Epub 2019 May 31.

Authors

Affiliations

¹ Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan; Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan. Electronic address: kawamotod@fc.jwu.ac.jp.
² Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
³ Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima, 960-1296, Japan.
⁴ Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.
⁵ Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
⁶ Research Center for Synchrotron Light Applications, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan.
⁷ Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494, Japan.
⁸ Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo, 112-8681, Japan.
⁹ Department of Chemistry, Faculty of Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan. Electronic address: yokoyamatakushi@chem.kyushu-univ.jp.

PMID: 31202056
DOI: 10.1016/j.jhazmat.2019.04.076

Abstract

An effective method for removing selenium (Se) from water is required from the viewpoint of environmental preservation. To establish this method, a cation exchange resin that adsorbed ferric ions was applied as an adsorbent. In this study, the adsorption behavior of Se to the adsorbent was examined by both batch and column methods. The batch experiment confirmed that selenite ions (Se(IV)) are effectively adsorbed but selenate ions (Se(VI)) are hardly adsorbed. To elucidate the adsorption mechanism, the Fe in the adsorbent and the Fe in the adsorbent after the adsorption of Se(IV) were characterized by Fe K-edge X-ray absorption spectroscopy and ⁵⁷Fe Mӧssbauer spectroscopy. The analytical result of Se K-edge EXAFS spectra for the Se(IV) adsorbed on the adsorbent suggests that Se(IV) are adsorbed specifically to the adsorbent through the formation of Fe-O-Se bonds. The breakthrough curve obtained by the column experiment showed that Se(IV) in 3 tons of synthetic solution containing 0.1 ppm Se can be efficiently removed using a column in which 12.8 g (10.4 cm³) of the adsorbent was packed.

Keywords: Cation exchange resin adsorbing ferric ions; Environmental preservation; Removal of selenium; Se pollution.

Publication types

Research Support, Non-U.S. Gov't