陶瓷废水中镍的去除试验研究  

EXPERIMENT STUDY ON REMOVAL OF NICKEL FROM CERAMIC INDUSTRY WASTEWATER

作　　者：唐子君[1,2] 方平[1,3] 岑超平[1] 梁阳明[1,3] 

机构地区：[1]环境保护部华南环境科学研究所,广州510655 [2]中国环境科学研究院,北京100012 [3]广州华科环保工程有限公司,广州510655

出　　处：《中国陶瓷》2013年第1期37-42,共6页China Ceramics

基　　金：国家高技术研究发展计划("863"计划)资助项目(2012AA062505);广东省战略性新兴产业核心技术攻关项目(2011A032303002);中央级公益性科研院所基本科研业务专项项目(2011-10)

摘　　要：采用混凝沉淀的方法去除模拟陶瓷废水中的离子态镍和络合态镍,通过实验选取最佳工艺条件。结果表明,当镍的含量为150mg/L(以Ni计)时,混凝沉淀法处理模拟废水中离子态镍的最佳工艺条件为:pH 9.5,FeCl35mg/L,Na2S75mg/L,去除率为99.04%;去除络合态镍(EDTA做配位体)的最佳条件为:KMnO41.5mmol/L(pH=2),pH 9.5,FeCl35mg/L,Na2S75mg/L去除率为26.74%,且降低溶液中镍的浓度有助于络合态镍去除率的提高。重金属捕集剂DTCR对镍有较好的去除效果,当DTCR投加量为1ml/L时,离子态与络合态镍的去除率分别为99.63%、7.05%,具有进一步研究的价值。Nickel including ionic form nickel and complexing form nickel was removed from simulated wastewater by means of flocculent precipitation. The processing parameters for treatment of nickel from simulated wastewater were optimized through experimen. The result shows that when the concentration of nickel was 150mg/L, the optimal conditions for treating ionic form nickel were： pH 9.5, Fee13 5mg/L, Na2S 50ml with the removal efficiency of 99.04%; the optimal condition for treating complexing state nickel （EDTA as ligand） were： KMnQ 1.5mmol/L（pH=2）, pH 9.5, FeC13 5mg/L, Na2S 75mg/L with the removal efficiency of 26.74%. Reducing the initial concentration of nickel in the solution could improve implexing state nickel removal efficiency The research proved that heavy metal capturing agent DTCR has a good performance on nickel removal, when DTCR usage amount was lml/L, the removal efficiency of ionic form nickel and complexing state nickel was 99.63% and 7.05% resperctively, which deserves to be further studied.

关 键 词：陶瓷废水 混凝沉淀 离子态镍 络合态镍 重金属捕集剂(重捕剂) 

分 类 号：TQ174.9[化学工程—陶瓷工业]