期刊
FUEL
卷 89, 期 9, 页码 2490-2495出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2010.01.039
关键词
Coal combustion; Wet FGD; Wastewater; Selenium; Selenate
In a coal combustion process, a considerable amount of selenium is captured in the wet FGD, where it is oxidized from selenite (Se(IV)O-3(2-)) to selenate (Se(IV)O-4(2-)) , which is difficult to remove. Diethyl-p-phenylene-diammonium (DPD) absorptiometric analysis and ion chromatography identified peroxodisulfate ion (S2O82-) as the dominant oxidizing agent in the FGD liquor. Selenite was easily oxidized to selenate in the presence of S2O82- and the oxidation was accelerated as the temperature increased. Addition of Mn2+ ion was found to be effective in controlling selenate formation. When Mn2+ ion was added, S2O82- oxidized not selenite to selenate but rather Mn2+ to MnO2, which captured some dissolved selenite. (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据