破络-Fenton法处理化学镀镍废水并回收水中的磷酸盐  

Combined complex-breaking and Fenton oxidation for electroless nickel plating wastewater and reclamation of phosphate

作　　者：赵榕烨 谷麟[1] 闻海峰[1] 李程序 张道方[1] 吴思帆[1] 

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《环境工程学报》2017年第4期2097-2102,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51408358)

摘　　要：以电镀厂化学镀镍的混合清洗水为处理对象,采用CaO破络吸附联合Fenton氧化的多级物化技术去除废液中的镍离子和磷酸盐,研究CaO投加量和反应时间对镍离子去除效率的影响以及Fenton试剂投加量、反应初始pH对废液中磷处理效果的影响。结果表明,通过两段式反应,当CaO投加量为2 g·L^(-1)、反应时间1 h;反应初始pH为4、H_2O_2投加量9.18 mg·L^(-1)、m(H_2O_2)/m(Fe^(2+))为5∶1、反应时间180 min时,镍离子和总磷(TP)含量由原来的64.6和90.2 mg·L^(-1)分别降低至0.43和0.46 mgl·L^(-1),均达到国家《污水综合排放标准》(GB 8978-1996)。处理后沉淀物经测试符合Fe_2(PO_4)_3晶体及其形貌特征,达到了资源回收的目的。Electroless nickel plating wastewater was treated by calcium oxide precipitation and Fenton oxidation in order to remove Ni^2＋ and phosphate. The effect of CaO dosage and precipitation time on the removal efficiency of Ni-（2＋） were studied,and the effects of Fenton dosage and pH on phosphate removal were also investigated. The results showed that Ni-（2＋） and TP in wastewater decreased from 64. 6 and 90. 2 mg·L^-1to 0. 43 and 0. 46 mg·L^-1,respectively,by combining the CaO precipitation and Fenton oxidation process. The optimal CaO dosage and reaction time were 2 g·L^-1and 1 h for precipitation and the optimal H2O2 dosage and m（ H2O2）/m（ Fe^2＋）were 9. 18 mg·L^-1and 5 ∶ 1（ mass ratio）,respectively. The treated effluent meets the criteria of the Integrated Wastewater Discharge Standard（ GB 8978-1996） of China. Moreover,the sediment formed after the Fenton reaction was characterized and determined to be Fe2（PO4）3,which would realize the goal of resource reutilization.

关 键 词：化学镀镍废水 破络合剂 FENTON氧化 资源化 

分 类 号：X781.1[环境科学与工程—环境工程]