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Molecules 2009, 14(9), 3567-3588; doi:10.3390/molecules14093567

Chemistry of the M (M=Fe, Ca, Ba)-Se-H2O Systems at 25 °C

1
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 1,1 Katahira, 2-chome, Aobaku, Sendai 980-8577, Japan
2
Graduate School of Student, Tohoku University, Currently Ebra Co. Ltd., Tokyo, Japan
3
New Industry Creation Hatchery Center Tohoku University, Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan
*
Author to whom correspondence should be addressed.
Received: 28 July 2009 / Revised: 18 August 2009 / Accepted: 11 September 2009 / Published: 14 September 2009
(This article belongs to the Special Issue Selenium and Tellurium Chemistry)
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Abstract

The chemistry of the M (M=Fe, Ca, Ba)-Se-H2O systems at 25 °C is reviewed based on our previous papers. In this paper, the phase equilibria in the Fe(III)-Se(IV)-H2O, Ca-Se(IV,VI)-H2O and Ba-Se(IV,VI)-H2O systems at 25 °C are discussed. Then, the three-stage process for removal of selenium from industrial waste water [Se(IV,VI) < 1,500 mg/L] containing sulfuric acid was introduced. This seems to be a promising process for selenium removal from acidic sulfate waste water containing high concentration levels of selenium to below 0.1 mg/L.
Keywords: aqueous chemistry; ferric selenite; calcium selenite and selenate; barium selenite and selenate; removal; selenium aqueous chemistry; ferric selenite; calcium selenite and selenate; barium selenite and selenate; removal; selenium
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Nishimura, T.; Hata, R.; Hasegawa, F. Chemistry of the M (M=Fe, Ca, Ba)-Se-H2O Systems at 25 °C. Molecules 2009, 14, 3567-3588.

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