摘要
为解决黄金冶炼渣浸出液处理难题,采用"两级氧化+酚腾试剂"处理黄金冶炼渣浸出液,试验表明,以次氯酸钠为破氰氧化剂效果优于次氯酸钙。当一级氧化有效氯与氰化物的质量比为4.5∶1、反应时间25 min,二级氧化有效氯与氰化物的质量比为8∶1,反应时间25 min,酚腾试剂中H2O2的用量为3.0 mL/L,FeSO4用量为2 g/L,反应时间70 min时,处理后出水总氰、COD去除率分别达到97.9%,67.7%,总铜未检出,水质指标达到GB 8978—2002排放标准要求。
In order to solve the difficult problem of treating the infiltrate in gold smelting residue, the ＂two-step oxidation with Fenton reagent＂ is used to treat it. The results indicated that the sodium bypoehlorite is more efficient than the calcium hypochlorite in the two-step oxidation process. With the conditions that the molar ratio of the available chlorine to the cyanide is 4.5：1 in the first oxidation process, the ratio 8：1 in the second oxidation process, 25 minutes reaction time both in the two oxidation process, and the hydrogen peroxide dosage of 3.0 mL/L,iron sub-sulfate dosage of 2 g/L and 70 minutes reaction time, 97.9% cyanide,67.7% COD and almost all of the copper ion can be removed, the effluent could match the national discharge standard GB8978.
出处
《环境科技》
2013年第3期42-44,共3页
Environmental Science and Technology
关键词
两级氧化
酚腾试剂
黄金冶炼渣
Two-step oxidation
Fenton reagent
Gold smelting residue
