某电镀厂失效铬镀液的回用试验研究  

Experimental Study on Reuse of Invalid Chrome Plating Bath

作　　者：肖谣 Xiao Yao(CCCC Hemei Eco-Environmental Construction Co.,Ltd.,Wuhan 430056,Hubei,China)

机构地区：[1]中交和美环境生态建设有限公司,湖北武汉430056

出　　处：《绿色科技》2023年第24期178-184,共7页Journal of Green Science and Technology

摘　　要：铬镀液在电镀行业中被广泛使用,使用过而失去效用的镀液被排出成为失效铬镀液,其对环境具有严重的危害,故需要谨慎处理。以黄石某电镀厂的失效铬镀液为研究对象,选用Ca(OH)_(2)+H_(2)O_(2)、Ba(OH)_(2)+H_(2)O_(2)、Ba(OH)_(2)及Ca(OH)_(2)为主要试剂,进行多种试验,探讨了去Fe^(3+)保Cr^(6+)的最佳条件。试验结果表明:向失效铬镀液中先加入15 mL H_(2)O_(2),再加入20 g Ba(OH)_(2),Fe^(3+)浓度由17.2 g/L降低到4.9 g/L,去除率为71.5%,此时Cr^(6+)浓度为188.4 g/L,Cr^(3+)为6.5 g/L,满足铬镀液的有效成分要求,达到了回用标准。对失效铬镀液进行回用处理,不仅能较大程度降低污染,而且节约经济成本,具有较高的实用价值。Chromium plating solution is widely used in the electroplating industry,and the used and ineffective plating solution is discharged as failing chromium plating solution,which is a serious hazard to the environment.Therefore,it needs to be handled carefully.In this paper,the failed chromium plating solution of a plating plant in Huangshi was studied.Ca(OH)_2+H_2O_2,Ba(OH)_2+H_2O_2,Ba(OH)_(2) and Ca(OH)_(2) were chosen as the main reagents,and a variety of experiments were carried out to explore the optimal conditions for removing Fe~(3+) to protect Cr~(6+).The test results show that by adding 15mL H_2O_(2) and then 20g Ba(OH)_(2 )to the failed chromium bath,the Fe~(3+) concentration was reduced from 17.2g/L to 4.9g/L,with a removal rate of 71.5%.At this time,the concentration of Cr~(6+) was 188.4g/L,and the concentration of Cr~(3+) was 6.5g/L,which meets the requirements for the active ingredients of chromium plating solution,and reaches the reuse standard.The reuse treatment of failed chromium plating solution not only reduces the pollution to a larger extent,but also saves the economic cost,which has a high practical value.

关 键 词：失效铬镀液 回用 Fe^(3+) 

分 类 号：X703[环境科学与工程—环境工程]