Iron line replacement method is used to recovery metal silver from silver sulfate in COD waste liquid, and it is reused to analyze, so analysis cost and environment pollution are decreased.
对COD废液中的硫酸银，采用铁线置换法回收金属银，进行循环使用，降低了分析费用，减小了环境污染。
2
This paper introduces the manganese pollution from the solution preparation of manganese sulfate and its pollution control technological design.
本文介绍了硫酸锰溶液制备工艺中锰的污染及其治理工艺设计。
3
There were no apparent different effects between using ferrous sulfate and using ferrous ammonium sulfate, the former was much cheaper and no secondary pollution.