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Molecules ; 14(9): 3567-88, 2009 Sep 14.
Article in English | MEDLINE | ID: mdl-19783944

ABSTRACT

The chemistry of the M (M=Fe, Ca, Ba)-Se-H(2)O systems at 25 degrees C is reviewed based on our previous papers. In this paper, the phase equilibria in the Fe(III)-Se(IV)-H(2)O, Ca-Se(IV,VI)-H(2)O and Ba-Se(IV,VI)-H(2)O systems at 25 degrees 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.


Subject(s)
Elements , Selenium/chemistry , Temperature , Water/chemistry , Industrial Waste/analysis , Thermodynamics
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