Fundamental studies on oxidizing roasting of the "bioselenium"

Osamu Otsuka, Yutaka Yanaba, Takeshi Yoshikawa, Mitsuo Yamashita

研究成果: Article査読

1 被引用数 (Scopus)

抄録

A method has been developed for the recovery and recycling of selenium (Se) from Se-containing wastewater using the Se reducing bacterium, Pseudomonas stutzeri NT-I. The treatment of Se-containing wastewater with strain NT-I produced the bioselenium, which was composed mainly of organic matter and 11-14 mass% of Se. Specifically, the recovery of Se from the bioselenium by oxidizing roasting followed by wet reduction was studied. After thermodynamic calculations were performed to estimate the oxidizing behavior during roasting, experiments were conducted on the bioselenium for various roasting conditions. Selenium in the bioselenium was recovered in the form of solid SeO2 with a purity of 99% (metal basis) and a maximum yield of 97 mass% after roasting at 700 °C. Wet reduction of SeO2 to metallic Se was achieved with a purity of 99% (metal basis).

本文言語English
ページ(範囲)1183-1191
ページ数9
ジャーナルMaterials Transactions
57
7
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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