粉煤灰混凝剂的性能研究

(,250022);;.,.,.30%60%,,..,t,(20%30%),,,.,.1Table1ChemicalofcompositionofflyashSiO2Al2O3Fe2O3CaOMgOSO3,%5719025120711521681133014051832Table2QualityofthewastewaterCOD,mg/LSS,mg/L(T400nm),%pH131015704130104101096413116815017911,.,,.,[14].,.1111,1.,2.FeCl3Al2(SO4)3.112,32517080,.400mL,20g,4h,.100g400mL(2mol/L)(18419987ACTASCIENTIAECIRCUMSTANTIAEVol.18,No.4July,19982mol/L)(1mol/L)(1mol/L),20min,.,HIACHIs22500.,500mL,pH,5min,800mL30min,.COD.FeCl3Al2(SO4)3.2211,3.3Table3Effectofsizeofflyashonitsadsorptionproperty32517080,mg/g292116224Table4Rateofdraw2offFe,Al,Siintheacids2mol/L2mol/L1mol/L+1mol/L,%113601561118,%119621632144,%111801821108,,325808113%..4.1Fig.1Surfaceofflyashparticulatewithoutacidtreatmentisnottreated2Fig.2Surfaceofflyashparticulatewithacidtreatment,,.1mol/L1mol/L.,.,,.,(1).,(2).23418,,.,.212,5.Al2(SO4)3FeCl36.5Table5EffectofflyashcoagulantontheindustrialwastewaterSS,%ABCCOD,%ABC,%ABC881989139012631664136917961296159816901290129110641264196919961397109819:A2mol/L;B2mol/L;C1mol/L1mol/L6Table6EffectofvariouskindsofcoagulantonthewastewaterSS,%abcCOD,%abc,%abc751372149012621261186917941393159816841481129110631362186919951493169819:aAl2(SO4)3,bFeCl3,cC.,AlFe311Al2(SO4)321FeCl331CFig.3Determinationofsupernatantaltitude5,CAB.,;.(4)..,.6.Al2(SO4)3FeCl3,.Al3+Fe3+.,.,,,.Al2(SO4)3FeCl3AlCl3Fe2(SO4)3FeSO4H2SiO3.,,.,,,,,,3344:.,,,,.,,.3.3,4.4Fig.4Technologicalprocessofindustrialwastewatertreatment,,.1..,1992,13(4):452..,1994,7(5):623..,1993,19(6):3554..,1995,16(2):475..:,1990PROPERTIESOFFLYASHCOAGULANTYuYanzhen,LiGuozhong,FuXinghua,DaiBaogang(ShandongInstituteofBuildingMaterials,Jinan250022)ABSTRACTThesurfacermicrostructureofflyashcoagulant,whichwasconvertedfromflyashbytreatmentofacid,wasstudiedusingSEM.Theadsorptionpropertyofthecoagulantandthecoagulationmechanismofflyashcoagulantfromindustrialwastewaterwereinvestigated.Keywordscoagulation,flyash,industrialwastewater.1997203221199720920343418