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Keywords = ferric selenite, calcium selenite and selenate

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22 pages, 856 KiB  
Review
Chemistry of the M (M=Fe, Ca, Ba)-Se-H2O Systems at 25 °C
by Tadahisa Nishimura, Ryosuke Hata and Fumihiko Hasegawa
Molecules 2009, 14(9), 3567-3588; https://doi.org/10.3390/molecules14093567 - 14 Sep 2009
Cited by 13 | Viewed by 11979
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Selenium and Tellurium Chemistry)
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