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

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号120593
ジャーナルJournal of Hazardous Materials
378
DOI
出版ステータス出版済み - 10 15 2019

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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