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.

• 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。