发明名称 |
TREATMENT METHOD FOR SELENIUM IN LIQUID CONTAINING SULFUR OXIDE |
摘要 |
PROBLEM TO BE SOLVED: To provide a treatment method for selenium in a liquid containing sulfur oxide in which selenium contained in wastewater or in a liquid where sulfur oxide coexists is separated and recovered effectively. SOLUTION: Hydrochloric acid is added to wastewater containing sulfur oxide for pH adjustment (step S1). Ferrous chloride is added to reduce hexavalent selenium into tetravalent selenium (step S2). Thereafter, SO<SB>2</SB>is oxidized into SO<SB>3</SB>by blowing air (step S3). Then, a rare earth compound is added to absorb selenium (tetravalent) (step S4). Then, the rare earth compound which has absorbed the selenium is separated to recover a treatment liquid. COPYRIGHT: (C)2008,JPO&INPIT
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申请公布号 |
JP2008221119(A) |
申请公布日期 |
2008.09.25 |
申请号 |
JP20070062323 |
申请日期 |
2007.03.12 |
申请人 |
NIPPON SHEET GLASS CO LTD |
发明人 |
HISHINUMA AKIMITSU;TAKAHASHI YASUSHI;MAEDA KOKI |
分类号 |
C02F1/28;C02F1/70;C02F1/72 |
主分类号 |
C02F1/28 |
代理机构 |
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