有色金属冶炼生产中含砷废水及废渣的治理研究

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1、武汉理工大学硕士学位论文有色金属冶炼生产中含砷废水及废渣的治理研究姓名：聂静申请学位级别：硕士专业：环境工程指导教师：李晔20060501AbstractThoughtherawmaterialss1ⅦctIlreofthesulpHuricacidproductioninourcountryhasbeen删ustedgreatlyinthepasttenyears,pyritewillbestillthemainmaterialinashorttime．ThewastewaterproducedbythesulpHuricacidp

2、roductionissourandcontainsmanykindsofharmfulsubstances，amongthemthecontentofarsenicandfluorineareveryhigh，whichisthemaincharacteristicofthiskindofwastewater．Thiskindofwastewaterwillpollutewaterandsoilseriouslyifitisdischargeddirectlywithnottreatment．itwillenterthehumanb

3、odythroughfoodchainorthesurfacewaterorgroundwaterfmallytodangerhumanshealth．So，itisurgenttotreattheacidarsenicwastewatereffectivelyandithasgreatsocial，economicandenvironmentalmeaningstostudyanddevelophigh-efficientandeconomyarsenicwastewatertreatmenttechnology．Whenthewa

4、termeetsthewater-pollution-control—standards，harmfulsubstancessuchasarsenicalemostlytransferedtothemud．Thisisnotanidealfinalresult．Itwillcausethesecondarypo蜥ontopileuporlandfillthearsenicwasteresiduesimplely．So，itisanewgreatsubjectthatwefacehowtorealizethesafetreatmentf

5、orarsenicwasteresidue．ThearsenicwastewaterastheresearchobjectcomesfromDayenon-ferrousmetalssmelterycompany．Theoriginaldirtyacidtreatmentcrafthassomeproblems，suchasthecontentofarsenicinthedischargedwaterexceedsstandardandtheamountofmudislarge．Thesubjecthasresearchedthepr

6、ocessconditionsandtreatmentresultsofseveraltechnologies，suchaslimeneutralization，sulpHurate，limeneutralization-aluminiumsaltcoprecilcIitation,limeneutralization-ferricsaltcoprecipitationandlimeneutralization—oxidize—ferricsaltcoprecipitation．Theresultsofthetestshowthati

7、tisoptimumtoadoptlimeneutralization—oxidize-ferricsaltcoprecipitationtodealwiththewastewater．Thedischargedwatercanmeetsthenationalsewageemissionstandard，theconcentrationofarsenicislowerthan0．5mg／L．Includingthepreviousgypsunlrecyclecr硪．thenewcraftstilladoptsthreesections

8、totreatthewastewater．Ithaveonlyimprovedtheoriginalprocessconditions，SOitcantotallyutilizedexistingfacilities，a