铅铋混合液连续测定中废液的回收与再生

Waste Recycling and Regeneration of the Lead and Bismuth Determination in Series

通过对Bi3+、Pb2+混合液配制方法与测定结果的关系实验,确定了硝酸铋溶解时浓HNO3用量.连续测定后的废液可用硫化钠和CTMAB沉淀,用稀硝酸溶解,再次配成所需酸度和Bi3+、Pb2+浓度的混合液,供学生实验重复使用,实现了化学实验的绿色化.

Relations between preparation of mixed solution containing Bi3 ＋ , Pb2＋ and testing results were studied. During Bi （ NO3 ） 3 dissolving, the quantity of HNO3 was determined. Sodium Sulfide and CTMAB are used as pre- cipitate to deal with the waste liquid after the continuous determination of Bi3＋ and Pb2＋ in which complexion is used. The precipitation was dissolved by HNO3 and then was used as a sample for the students＇ experiment repeat- edly. The adoption of this method has made the green chemistry experiment possible.