Photocatalytic reduction of Cr(VI) in Cr(VI)-citric acid-ferric nitrate compound system

被引：0
|
作者：
Lei, Xue-Fei [1 ]
Xue, Xiang-Xin [1 ]
Lei, Xue-Ying [2 ]
机构：
[1] School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
[2] Bureau of Urban Planning of Langfang, Langfang 065000, China
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2009年 / 19卷 / 02期
关键词：
Chromium compounds - Calcium compounds - Titanium - Blast furnaces - Citric acid - Nitrates - pH - Slags;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Using calcined sulfate-modified titanium-bearing blast furnace slag as photocatalyst, the photocatalytic reduction of Cr(VI) in Cr(VI) -citric acid-ferric nitrate compound systems were studied. The effects of pH values on the photocatalytic reduction and adsorption of Cr(VI) were investigated. The results indicate that the acidic solutions are favorable for the photocatalytic reduction of Cr (VI) in Cr(VI)-citric acid-ferric nitrate (Cr(VI)-CA-FN) compound system, and the optimum pH value for the reduction of Cr (VI) is 2.5. The effect of adsorption on the photocatalytic reduction of Cr(VI) decreases. The recombination rate of electron-hole pairs decreases, and hence the reduction efficiency of Cr(VI) enhances. The decline of Cr(VI) concentration is caused by the compound effect between the reduction of Mn2+ and the photocatalytic reduction.
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页码：383 / 388
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