重金属捕集剂DTC-SC处理含Cu^(2+)、Cd^(2+)和Mn^(2+)废水研究  

THE TREATMENT OF WASTEWATER CONTAINING Cu^(2+), Cd^(2+) AND Mn^(2+) BY THE HEAVY METAL CAPTURING AGENT DTC-SC

作　　者：谭聪[1] 刘妮[2] 王双飞[2] 朱红祥[2] 

机构地区：[1]广西大学环境学院 [2]广西大学轻工与食品工程学院,广西南宁530004

出　　处：《水处理技术》2015年第9期46-48,52,共4页Technology of Water Treatment

基　　金：国家高技术研究发展计划(863)项目(2009AA06A416);广西桂科攻项目(14251009)

摘　　要：研究合成了1种新型二硫代氨基甲酸盐重金属捕集剂DTC-SC,考察其在不同条件下处理含Cu2+、Cd2+、Mn2+废水的实际效果。结果表明,处理200 m L质量浓度20 mg/L的Cu2+、Cd2+、Mn2+重金属废水,DTC-SC投加量为70 mg,p H在2~10效果较为理想,其中当p H在大于8之后效果最好,搅拌反应10 min,Cu2+、Cd2+去除率达99%以上,处理后质量浓度低于0.1 mg/L,Mn2+的去除率在90%以上,处理后质量浓度低于2 mg/L,达到GB 8978-1996排放要求。通过复合重金属模拟废液处理研究,发现Cu2+比Mn2+及Cd2+优先反应,Cd2+比Mn2+优先反应,在适当p H条件下加入适量的重金属捕集剂可使废水中3种离子含量均降低至国家排放标准以下。A new heavy mental capturing agent DTC-SC containing dithiocarbamate was successfully synthesized, and the treatment efficiency of Cu^2＋, Cd^2＋ and Mn^2＋ from heavy metal wastewater under different conditions was investigated. The results showed that： for 200 mL wastewater containing 20 mg/L mass concentration of Cu^2＋, Cd^2＋ and Mn^2＋, the residual dosage of mass concentration of Cu^2＋ and Cd^2＋ was below 0.1 mg/L and mass concentration of Mn^2＋ was below 2 mg/L by added 70 mg DTC-SC, pH 2-10 （pH≥ 8 was the best condition） and slower disturbances for 10 min. The removal rate of Cu^2＋ and Cd^2＋ from wastewater could be achieved over 99% and Mn^2＋ from wastewater could reach 90% which was enough to meet the request of GB 8978-1996. Through the co-existence of Cu^2＋, Cd^2＋ and Mn^2＋ in wastewater treatment research, we could found that Cu^2＋ was preferentially reacted compared with Cd^2＋ and Mn^2＋, and Cd^2＋ was preferentially reacted compared with Mn^2＋. And the residual dosage of these three ions could meet the requirements of GB 8978-1996 under the proper pH conditions.

关 键 词：二硫代氨基甲酸盐 重金属捕集剂 重金属废水 

分 类 号：X703.1[环境科学与工程—环境工程]