混凝法处理含镍电镀废水_杨丽芳

混凝法处理含镍电镀废水TreatmentofWastewaterContainingNickel(II)byCoagulation杨丽芳1,　张志军2,　张文波1(1.苏州市创新净化有限公司,江苏苏州215144;2.江苏工业学院环境与安全工程学院,江苏常州213164)YANGLi-fang1,　ZHANGZhi-jun2,　ZHANGWen-bo1(1.SuzhouChuangxinPurificationCo.,Ltd.,Suzhou215144,China;2.CollegeofEnvironmentandSafetyEngineering,JiangsuPolytechnicUniversity,Changzhou213164,China)摘要:　通过正交实验和对比实验考察了两种絮凝剂FeSO4和PAC对废水中低质量浓度的Ni2+的去处效果,主要研究了添加絮凝剂的质量浓度、溶液的pH值、搅拌速率和搅拌时间等因素对去除率的影响,并对絮凝后的污泥性能进行相关实验。结果表明:絮凝处理操作简单,污泥产生量少,工业应用性强,且去除率较高;当溶液的pH值为9.6,FeSO4的质量浓度为3.75mg/L时,Ni2+的去除率平均可达96.8%以上,而且经FeSO4絮凝后产生的污泥具有一定的絮凝效果,可回流至絮凝工艺段重复使用。关键词:　FeSO4;亚铁絮凝;含镍废水Abstract:　TheefficiencyforremovinglowmassconcentrationNi2+inwastewaterusingtwoflocculantsofFeSO4andPACwasinvestigatedbyorthogonalexperimentandcomparisonexperiment,focusingontheeffectsofmassconcentrationofflocculentaswellaspHvalueofsolution,stirringrate&timeandotherrelatedfactorsontheremovingrate.Therelatedexperimentsontheperformanceoftheflocculatedsludgewerealsoconducted.Theresultsshowthatflocculationis