扩散渗析-电沉积联合工艺资源回收酸性含铜树脂脱附液

发布时间：2018-04-04 00:47

本文选题：扩散渗析　切入点：电沉积　出处：《膜科学与技术》2017年05期

【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。
[Abstract]:Analysis of the characteristics of acid copper containing resin desorption liquid, the successful development of the electro deposition diffusion dialysis combined process step by step recovery of acid copper containing resin acid and copper of liquid. The results show that, when the diffusion dialysis device of material liquid flow rate is 0.6L/h, tap water and acid copper containing resin desorption liquid flow ratio 1, the recovery in H+ acid concentration is about 1.12mol/L, acid recovery rate was 80.2% (H~+ concentration wastewater was 1.2mol/L, Cu~ (2+) concentration is 0.16mol/L), can be returned to the resin regeneration system as desorption agent reuse; the average concentration of copper ion diffusion dialysis in the residual liquid 0.12mol/L into the electrodeposition device for regulating pH to 2.5, when the electrodeposition reaction time is 300min, voltage is 9V, the average current efficiency is 46.2%, the copper recovery rate can reach 98.2%, the recovery of copper diffusion dialysis - purity for the development of the 98.9%. electrodeposition combined process can also be applied to other industries Resource recovery of acidic waste liquid containing heavy metals.

【作者单位】：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;惠州金茂实业投资有限公司;南华大学城市建设学院;环保部华南环境科学研究所;
【基金】：水污染控制与治理国家重大专项(2012ZX07206-003)
【分类号】：TQ028.7;X703

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