期刊论文

中文

环境科学研究

1001-6929

2000

13

5

17-19

10.3321/j.issn:1001-6929.2000.05.006

本校为其他机构

该文提出用巯基沉淀剂来沉淀硝酸型退铅锡废水中的重金属离子 （Cu ,Fe ,Pb ,Sn） ,实验结果表明 ,适宜的沉淀条件为 :在搅拌下将巯基沉淀剂P按理论量加入 ,同时按每升废液通入还原性添加剂二氧化硫 1 2 g和 3～ 5mL ,1 % （W /W）PAM （分子量为 4 0 0 0 0 0 ）絮凝剂 ,沉淀过滤后其退锡速度和退锡容量等性能与原退锡液无异 ,该工艺可使PCB企业的退铅锡废水实现循环使用。

In this paper an acidic precipitation agent bearing mercapta was used to capture heavy metals (including Cu, Pb, Sn and Fe) from the HNO 3-type wastewater in the solder stripping process of PCB factories. The experimental results showed that the feasible precipitation factors are: the precipitation agent is added by the chemically calculated amount to the wastewater with stirring and accompanying of 12 g/L SO 2 and 3～5 mL of 1% PAM (MW=400 000), respectively. The regenerated solution after filtration was as good as the fresh stripping solution...