Study On Treatment Of Electroplate Wastewater With Copper By Ion-exchange And Electrodeposition

In this paper, the feasibility of combination technique of ion-exchange andelectrodeposition on copper-containing electroplating wastewater was investigated inorder to implementation of wastewater discharging standard as well as recovery copper.As we know, ion exchange is suitable for low concentration of wastewater with goodeffect, but the part of regeneration solution needs to be further treated. Moreover,electrodeposition usually does well in high concentration wastewater with the ability ofcopper recover. The combination technique combines the advantages of ion exchangeand electrodeposition, at the same time avoid weaknesses, and realizing the recover ofcopper and discharging standard. The treatment of combination technique on copperwastewater generated from acidic copper electroplating wastewater was investigated.In the ion-exchange experiment, the R32resin was selected a suitable adsorptivematerial based on study of ion exchange capacities. In the static adsorption experiment,the results indicated that the bast pH was about4, the bast desorbent was5%H2SO4. Inthe dynamic adsorption experiment, the results indicated that the bast rate is10BV/h.Further optimization for parallel and series experiment on the R32, the seriesadsorption capacity is biggest, compares the single column to enhance13.3%. Inaddition, Desorption solution of lower concentration can be used as paraphrase liquid toimprove concentration of desorption solution.Electrodeposition experiments focus on current density, initial concentration, pHvalue, temperature and reaction time as the main operating parameters, effects ofoperation parameters on the treatment effect were investigated. The optimumexperimental conditions were obtained： current density as210A/m2, the initialconcentration of10000mg/L~15000mg/L, pH at0.8, temperature at60℃andelectrolysis time for4h. Under these conditions, the purity of copper was99.7%.Studies date indicate that the joint action of ion-exchange and electrodeposition issuitable for industrial production due to its process simplicity. The experimental resultsprovide basis and references for the design and operation of actual systems, meet thenational requirements of sustainable development.