实验室废定影液和显影液的综合利用

Comprehensive Utilization of Lab's Waste Fixer and Developer

采用还原性混合液回收废定影液中的银,通过高温灼烧、硝酸溶解、除杂等一系列步骤制备试剂级硝酸银;同时,进行了废显影液作为花卉营养液利用的研究。结果表明,银的回收率达92.7%,制备的硝酸银纯度为99.86%以上,达到分析纯级别;未污染的废显影液经过简单处理后可做花卉营养液;处理后的废水都达到国家规定的排放标准,实现了废物利用的目的。

The silver is recycled, by adding deoxidized mix liquid from waste fixer, then silver nitrate is made with a series of refining process such as baking, solving and impurity emoving. The results show the recycle ratio of silver is higher than 92.7 %, and the purity of silver nitrate is higher than 99.86%. Un-contamined waste developer can be used as nourishment liquid by a simple process. The treated wastewater is complied to the national wastewater discharge standard.