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

Molecules

Tadahisa Nishimura¹  Ryosuke Hata¹ 

[1] ¹Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 1,1 Katahira, 2-chome, Aobaku, Sendai 980-8577, Japan ²Graduate School of Student, Tohoku University, Currently Ebra Co. Ltd., Tokyo, Japan ³New Industry Creation Hatchery Center Tohoku University, Aoba, Aramaki, Aobaku, Sendai 980-8579, Japan

关键词: aqueous chemistry;    ferric selenite;    calcium selenite and selenate;    barium selenite and selenate;    removal;    selenium;   

DOI  :  10.3390/molecules14093567

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.