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改性粉煤灰在处理锑矿选矿废水中的应用
引用本文:朱静,吴丰昌.改性粉煤灰在处理锑矿选矿废水中的应用[J].环境科学学报,2010,30(2):361-367.
作者姓名:朱静  吴丰昌
作者单位:1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳,550002;中国科学院研究生院,北京,100039;贵州大学化学与化工学院,贵阳,550003
2. 中国环境科学研究院国家环境保护湖泊污染控制重点实验室,北京,100012
基金项目:中国科学院创新工程重要方向项目(No. kzcx2-yw-102);国家自然科学基金项目(No. 40525011, 40632011)
摘    要:针对锑矿选矿废水中锑和丁基黄原酸钠严重超标的问题,用酸改性粉煤灰对其进行吸附处理.试验结果表明,当改性粉煤灰处理选矿废水的最佳质量体积比(g.mL-1)为1:100,pH值为3,静置时间为4h时,可以将选矿废水中的锑浓度从28.611mg.L-1降到0.05mg.L-1以下,去除率达99.8%以上;废水中的丁基黄原酸钠浓度可从0.373mg.L-1降到0.02mg.L-1以下,去除率达95.0%以上.处理废水后的改性粉煤灰用硫酸-硝酸浸提,浸出液中重金属离子浓度均低于国家浸出毒性标准,表明改性粉煤灰是一种很好的锑矿选矿废水处理剂.

关 键 词:改性粉煤灰  选矿废水    丁基黄原酸钠  浸出毒性
收稿时间:5/25/2009 9:50:09 PM
修稿时间:7/20/2009 8:38:18 PM

Treatment of wastewater released from antimony ore processing using acidified coal fly ash
ZHU Jing and WU Fengchang.Treatment of wastewater released from antimony ore processing using acidified coal fly ash[J].Acta Scientiae Circumstantiae,2010,30(2):361-367.
Authors:ZHU Jing and WU Fengchang
Institution:1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002; 2. Graduate School, Chinese Academy of Sciences, Beijing 100039; 3. The college of Chemical Engineering, Guizhou University, Gui and State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012
Abstract:The removal of antimony and sodium butyl xanthate from antimony ore wastewater using acidified coal fly ash were investigated under various conditions of dosage, pH and standing time. The results demonstrated that at a dosage of 1 : 100 and pH 3, the concentration of antimony decreased from 28.611 mg·L~(-1) to 0.05 mg·L~(-1) (up to 99.8%) and the concentration of sodium butyl xanthate decreased from 0. 373 mg·L~(-1) to 0.02 mg·L~(-1) (up to 95.0%) over a 4 h period. After use, the acidified coal fly ash was leached with sulphuric and nitric acids and the contents of heavy metals detected in the leaching liquid were below the national standard, indicating a low toxicity of the solid fly ash waste. This result indicates that acidified coal fly ash can be useful as an absorbent to treat wastewater from antimony ore processing.
Keywords:acidified coal fly ash  antimony ore processed wastewater  antimony  sodium butyl xanthate  leaching toxicity
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