城市污泥中重金屬的形態(tài)分布和處理方法的研究.pdf

1、青島建筑工程學(xué)院碩士學(xué)位論文城市污泥中重金屬的形態(tài)分布和處理方法的研究姓名：安淼申請學(xué)位級別：碩士專業(yè)：環(huán)境工程指導(dǎo)教師：李永秋2000.3.26青島建筑工程學(xué)院碩士學(xué)位論文AbstractInthisthesis，thestudywasmadeonthestatedistributionandtransformationofheavymetalsinmunicipalsludgeMeanwhile，twovariousmetaldis

2、posalprocesseswerediscussedTheextentofcontaminatingenvironmentbyheavymetalsisrelevanttotheirexistingformsinsludgeHeavymetalsexistingstateinmunicipalsludgecanbeclassifiedasfollowing：exchangeableionicform，combinedwithcarbo

3、nateform，combinedwithFeandMnoxidesform，combinedwithsulphideandorganismformandresidueformThefirstthreestatesareunstableandthelasttwoarestableInthisstudy，chemicalreagentextractingmethodwasusedtOanalyseexistingformsofheavym

4、etalinvarioussludgeThetransformationtendencyofstatedistributionoftheheavymetalinanaerobicdigestionprocesswasinvestigatedTheimpactofanaerobicdigestionprocessuponthestatesofheavymetalswasalsoproposedBasedontheanalysesofmet

5、alstate，theauthorinvestigatedthetransformationofdifferentstatesofheavymetalsinurbansludgethroughthelaboratorysimulationofpracticalanaerobicdigestionprocessesThestudywasmademainlyontheroleofS042。tothechangesofthestatesofh

6、eavymetalinthedigestedsludgeTheextractionrateofheavymetalatdifferentpHwasresearchedbyacidextractionTheresultsofthestudyshowedthat：theconcentrationofZn(2670～2960mg／kgdrysludge)ishighinthesludgefromHaiBoHesewagetreatmentpl

7、ant，andotherheavymetals’concentrationislowAbout72％Cuexitincombinedwithsulphideandorganismform，About74％Znand70％Niexitinunstableform，andotherheavymetalsmainlyexitinstableformAnaerobicdigestionprocesshasallobviouslyinfluenc