正弦交流电絮凝处理含锌电镀废水的研究  

Study on treatment of zinc-containing electroplating wastewater by sinusoidal alternating current electrocoagulation

作　　者：周益辉 易师 雷细平 徐涛 ZHOU Yihui;YI Shi;LEI Xiping;XU Tao(Hunan Automotive Engineering Vocational College,Zhuzhou 412001,China;Aerospace Kaitian Environmental Technology Co.,Ltd.,Changsha 410100,China;College of Science,Central South University of Forestry and Technology,Changsha 410004,China;College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南汽车工程职业学院,湖南株洲412001 [2]航天凯天环保科技股份有限公司,湖南长沙410100 [3]中南林业科技大学理学院,湖南长沙410004 [4]湖南大学化学化工学院,湖南长沙410012

出　　处：《电镀与涂饰》2024年第1期136-143,共8页Electroplating & Finishing

基　　金：国家自然科学基金项目“铁电极交流电解制备铁溶胶机理及电絮凝处理重金属废水的应用研究”(51974115);湖南汽车工程职业学院院级课题“正弦交流电解双铁耦合电极生成铁溶胶及处理电镀废水机理研究”(HQZYKY2023A10)。

摘　　要：[目的]电镀废水中的Zn^(2+)污染控制是当前重要的工业水环境技术问题。[方法]采用正弦交流电絮凝技术和自制的电絮凝装置从废水中除去Zn^(2+)。采用数值模拟的研究方法对电絮凝装置进行了流场分析,并通过实验研究了溶液初始pH、电流密度、初始锌离子浓度、反应时间等因素对去除Zn^(2+)的影响,使用响应面优化方案的Box-Behnken设计获得Zn^(2+)最高去除效率的最佳工艺参数。[结果]钛篮孔板大于3层有利于实现电絮凝装置流场均匀分布;在pH=9、含120 mg/dm^(3)Zn^(2+)的模拟废水溶液中,施加电流密度为0.31 A/m2、频率为50 Hz正弦交流电,通电21.3 min,Zn^(2+)的去除率可达到98.80%。[结论]响应面优化可用于正弦交流电絮凝处理含Zn^(2+)废水的过程。[Introduction]Treatment of electroplating wastewater containing Zn^(2+)is an important technical problem of water pollution control in industry.[Method]The removal of Zn^(2+)from electroplating wastewater was studied by sinusoidal alternating current coagulation(SACC)with a homemade electrocoagulation device.The flow field in the electrocoagulation device was analyzed by numerical simulation.Four factors affecting the removal efficiency of Zn^(2+)i.e.initial Zn^(2+)concentration,initial pH value,current density,and reaction time were discussed,and optimized by Box-Behnken design(BBD).[Result]The removal efficiency of Zn^(2+)from an artificial wastewater containing Zn^(2+)120 mg/dm^(3)with a pH of 9 was up to 98.80%after electrolysis with a 50 Hz AC at current density 0.31 A/m^(2)for 21.3 min.[Conclusion]The response surface methodology is applicable for optimizing the treatment of Zn^(2+)-containing wastewater by SACC.

关 键 词：含锌电镀废水 正弦交流电絮凝 响应面优化 装置 数值模拟 

分 类 号：X781.1[环境科学与工程—环境工程]