扩散渗析-电沉积联合工艺资源回收酸性含铜树脂脱附液  

Resource recovery treatment of an acidic resin regenerant containing Cu^(2+) using diffusion dialysis and electrodeposition

作　　者：王刚[1] 张炜铭[1] 杨柽瀚 王劲松[3] 虢清伟 邴永鑫 孙平[1] 吕路[1] 潘丙才[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室南京大学环境学院,南京210093 [2]惠州金茂实业投资有限公司,惠州516000 [3]南华大学城市建设学院,衡阳421001 [4]环保部华南环境科学研究所,广州510632

出　　处：《膜科学与技术》2017年第5期103-109,共7页Membrane Science and Technology

基　　金：水污染控制与治理国家重大专项(2012ZX07206-003)

摘　　要：分析了酸性含铜树脂脱附液的组成特征,成功开发了扩散渗析-电沉积联合工艺分步回收酸性含铜树脂脱附液中的酸和铜.研究结果表明,当扩散渗析装置料液流量为0.6L/h,自来水与酸性含铜树脂脱附液流量比为1.0时,回收酸中H+浓度约为1.12mol/L,酸回收率为80.2%(废液中H^+浓度为1.2mol/L,Cu^(2+)浓度为0.16mol/L),可返回树脂再生系统作为脱附剂回用;扩散渗析残液中铜离子平均浓度为0.12mol/L,调节pH至2.5后进入电沉积装置,当电沉积反应停留时间为300min,槽电压为9V时,电流效率平均为46.2%,铜回收率可达到98.2%,回收铜纯度为98.9%。开发的扩散渗析-电沉积联合工艺还可以推广应用于其他行业含重金属酸性废液的资源回收。The main components of an acidic resin regenerant containing Cu^（2＋）ions from the electroplating industry have been analyzed.The resources in the resin regenarant could be recovered separately by the joint application of diffusion dialysis（DD）and electrodeposition（ED）,and the operating parameters were optimized.It was found that the acid recovery could reach 80.2% and H＋concentration was 1.12 mol/L when the flow rate was 0.6 L/h and the flow rate ratio was 1.0（the H~＋ concentration was 1.2 mol/L,and the Cu^（2＋） concentration was 1.5 mol/L in the acidic resin regenerant）.The recovered acid can be reused in the next resin regeneration,while the DD raffinate could be further treated by the ED method to recover Cu.Using the optimized parameters of 9 Vvoltage,300 min reaction time,and pH 2.5 of the raffinate,the copper recovery,the current efficiency,and the copper purity could reach 98.2%,46.2%,and 98.9%,respectively.This integrated DD-ED strategy can be applied to recover other heavy metal resources from industrial acidic raffinates.

关 键 词：扩散渗析 电沉积 含重金属酸性废液 资源化回收 

分 类 号：TQ028.7[化学工程] X703[环境科学与工程—环境工程]