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:,24,(,200092),.,.,.;;;;;..,[1],.,,,.1.,23[2,3].(),,1[4].,.,,Zeta.1Table1Molecularweightdistributionofstraw2pulpinglignin2000020000100001000010001000,%49.1918.3726.675.77111:NICOLET/5DX(KBr).Zeta():U.:H2800,1156.:H28010,2000(2K).1:pH7;2:pH45;3:pH3.11211211212.,1267,1218,1030cm-1CH3488cm-1174199710ACTASCIENTIAECIRCUMSTANTIAEVol.17,No.4Oct.,19971Fig.1Theinfraredspectrogramofstraw2pulpingligninOH.OH36503600cm-1,[5].1663,1692,1709,1725cm-14.1725cm-1.2840cm-1CHFemi,.,21400cm-1.2Fig.2Themicroscopephotosoflignincolloidsandflocs,,.11212pH,28,pH7-1510-1617mV..pH,,,,.[6]pH:pH412512,=-2214-2218mV;pH311,=-1514mV.,.11213.1544::pH7(22a),;pH45(22b),.:pH,45,.pH3(22c),:(),,;30m.,.,:,.,,.,,.23,(PAC)(PAM),.2112111132.23Table2Compoundingofthreeflocculantsolutions,1g/L(PAC),10g/L(PAM),50mg/L21112DBJ2621(JarTest)[7].21113pH:pHS23DC.:GDS23(),CODCr:.:721,[8](400700nm20nm,16Ai,i=116,Ai).:UV2201RecordingSpectrophotometer().21221211,,:pHCODCrBOD5SS(C1-),mg/L(pH)3.03.5(36)(115210)5,00023.254173Fig.3TheresultsofM.G.wastewatertreatmentwithligninstraw2pulping:=1-C1C0V0V0+V1100%C0,mg/L;C1,mg/L;V0,L;V1,L.21212.,pH=4,COD2.3.3PACPAMTable3Theresultsofbrewerywastewatertreatmentwithstraw2pulpinglignin,PACandPAM,mg/L,%COD,g/g9146083.624.8216728139895.822.4719214294.718.33PAC2002813200028.9PAM0.052813184034.6:pH=4,,pH3,PACpH74PACPAMTable4Theresultsofdyewastewatertreatmentwithstraw2pulpinglignin,PACandPAM,mg/L,%,%102603.54629044.081.42.00137.9317027.087.51.77540.642854.097.81.48441.453753.598.01.31841.56PAC13080.469.17PAM0.582.0:PACNaOHpH7Ai21213.,..pH:015310;SS:150250mg/L;CODCr:7001000mg/L,.34.3():3544:,RNH+4COOH,,11213..,,.,,,().,,..1..,1993(1):33362..:,19903..:,19884,..,1995,23:4214255..:,19856..,1994,16(1):38487.().:,19858..,1988,8(2):40421996201222NATUREOFSTRAW2PULPINGLIGNINASCOAGULANTANDITSAPPLICATIONZhangZhilan,LuYongsen(DepartmentEnvironmentalEngineering,TongjiUniversity,Shanghai200092)ABSTRACTThestudyonthecolloidalchemicalnatureofstraw2pulpingligninshowsthatligninisakindofanionmacromolecularcoagulantwithmanyactivefunctiongroups.Microscopicobservationsdemonstratethatligninflocsareleafandtilelikewhichcantrapandsweepthecolloidalparticlesforsedi2mentation.Itisprovedthatlignincoagulantiseffectivefortreatmentofacidicwasteliquorsfromfermen2tation,dye2stuffandotherindustrieswithhighremovalrateofsuspendedsolids,colorandCOD.Keywordslignin,coagulant,monosodiumglutamatewastewater,dyeingproductionwastewater,sweep2ing,trapping.45417