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1、第27卷增刊河北大学学报(自然科学版)Vol.27Supp.2007年10月JournalofHebeiUniversity(NaturalScienceEdition)Oct.2007高压脉冲电絮凝法处理电镀废水＊朱小梅,赵娜,刘晓星,公维民,孙冰(大连海事大学环境科学与工程学院,辽宁大连116026)3+6+2+摘要:在电解槽中将铁板作为电极,探讨了高压脉冲电絮凝技术处理含Cr,Cr和Zn的电镀废水,并与直流电絮凝方法作了对比.实验结果表明,高压脉冲电絮凝法处理的工业电镀废水出水水质较好,在6
2、+2+最优条件下,处理后的废水中总铬和Cr含量均为～0.1mg/L,Zn含量为～0.6mg/L,pH=8.3,均达到国家规定的排放标准水平.该法运行方便,处理时间短、与直流电絮凝法相比能量效率高,是较理想的电镀废水治理工艺,具有很好的推广应用价值.关键词:电絮凝;电镀废水;高压脉冲;重金属TreatmentofElectroplatingWastewaterbyHighVoltagePulsedElectrocoagulationZHUXiao-mei,ZHAONa,LIUXiao-xing,GO
3、NGWei-min,SUNBing(CollegeofEnviromentalScienceandEngineering,DalianMaritimeUniversity,Dalian116026,China)Abstract:HighvoltagepulsedelectrocoagulationtechnologywasdesignedtoremovethetotalCr,Cr(Ⅵ)andZn(Ⅱ)ofelectroplatingwastewaterbyusingironplateaselect
4、rodeinthehydroelectricbath,andthemethodwascomparedwiththedirectcurrentelectrocoagulationmethod.Theinitialmassconcentrationsofthewastewateraretotalρ(Cr)=168.6mg/L,ρ(Cr(Ⅵ))=22.8mg/Landρ(Zn(Ⅱ))=29.9mg/L.Experi-mentalresultsindicatethatthehighvoltagepulse
5、delectrocoagulationtechnologycanremovetheelectroplatingwastewaterefficiently.AfteradjustingthepHto7-9byNaOH,theresidualmetalmassconcentrationsofthewastewaterunderlegallimitsofindustrialwater(GB8978-1996)areobtained,justafterabout8minute.ThetotalCrmass
6、concentrationisabout0.1mg/L,Cr(Ⅵ)massconcentrationisalsoabout0.1mg/L,Zn(Ⅱ)massconcentrationisabout0.6mg/Lwiththeoptimumexperimentalconditions.Comparedtothedirectcur-rentelectrocoagulationmethodandconventionalexistingtechniques,thehighvoltagepulsedelec
7、trocoagulationtechnologyhasthemeritsofeasieroperating,shorterrunningtimeandhigherenergyefficiency.Thehighvolt-agepulsedelectrocoagulationtechonologyisanidealusingtechniqueforthetreatmenttotheelectroplatingwastewatercontainingchromiumandzincandhasagrea
8、tpotentialforindustrialapplication.Keywords:electrocoagulation;electroplatingwastewater;highvoltagepulse;heavymetal电镀工厂排放的废水中通常含有大量的重金属,包括Cr,Cd,Cu,Ni和Zn.这些重金属离子进入水体后可以被生物体吸附,一旦进入食物链,将在人体内富集而使人体中毒,甚至导致死亡.人们在逐渐认识到重基金项目:国家自然科学基金资助项目(20577004)＊通讯作
