| 还原-凝聚法处理络合铜废水条件研究 |
| 摘要点击 769 全文点击 976 投稿时间：1987-09-28 |
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| 中文关键词 |
| 英文关键词 |
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| 中文摘要 |
| 电镀生产实践表明,络合剂铜电镀由于镀件质量稳定、光泽而得到应用,有些工厂往往采用EDTA、柠檬酸和酒石酸等络合剂进行酸性镀铜或三乙醇胺碱性镀铜,从而产生了大量含铜的络合剂废水。此种废水由于含有多种络合剂,处理难度较大,国内外对其处理方法进行了大量的研究。 |
| 英文摘要 |
| The conditions for treating copper-containing complex wastewater by Fe2+ reduction coagulation have been studied. In the mean time,coprecipitation with other inorganic coagulants [CaCl2,PAC,Fe2(SO4)3] has been discussed. The results in lab and productive experiments show that when EDTA citric acid or tartaric acid exists in wastewater,the effect of single chemical precipitation on removing copper is very poor. Al the unstability of complex copper in acidic solution,Cu2+ can be reduced to be Cu2+ with Fe2+ at pH=4.5—5,and then by increasing pH to 8—9,coprecipitation will take place,In this way the residual copper in outflow is always less than 1mg/L. Thus,an economical and efficient technology will be presented for treating of cooper-containing complex wastewater. |
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