废定影液的处理和再生利用  

Treatment and Regeneration of Waste Fixer

作　　者：王大勇[1] 李挺[1] 

机构地区：[1]后勤工程学院营房管理与环境工程系,重庆400016

出　　处：《环境科学导刊》2010年第1期62-63,共2页Environmental Science Survey

基　　金：重庆市科技攻关计划项目(CSTC;2008AB7132)

摘　　要：采用Na2S-SO2法处理废定影液,以硫化钠沉淀定影液中的银,用二氧化硫对废定影液进行再生处理,结果表明:银的回收率达到了95%,再生的废定影液,亚硫酸钠补充率达到了100%,硫代硫酸钠补充率约为50%,每1L再生定影液需再投加126g Na2S2O3.5H2O;废定影液处理经济收益约128万元/a。The Na2S- SO2 method was used to treat waste fixer. The Na2S was used to precipitate the silver ion in waste fixer, and then the sulphur dioxide was applied to regenerate the waste fixer. The results show that the reclaim rate of silver can reach 95%, and the fill rate of Na2SO3 is 100%, however, the fill rate of Na2S2O3 · 5H2O is 50%, it should be added in waste fixer with 126g per liter. The benefit of waste fixer in the method is 1.28 million Yuan annually.

关 键 词：废定影液 再生处理 银回收 

分 类 号：X703[环境科学与工程—环境工程]