七水硫酸亚铁治理利用的研究

＊　。＊郑典模　孙曰圣　刘晓红　卢芳仪　蒋柏泉(,330029)　研究用七水硫酸亚铁联产硫酸钾、氯化铁红、氯化铵,液体二氧化碳的工艺,该工艺不产生二次污染。研究结果表明:35～45℃的氧化反应温度,550～650℃的煅烧温度、大的氧化相界面积是保证铁红质量的恰当条件。　七水硫酸亚铁　治理　利用1　、,,。t,20t,,,,。,、、[1～3],。,[4],。,、、、,。2　2.1　治理流程及原理,,1。FeSO4·H2O122KClK2SO4133　　NH4Cl　CO2CO2NH4HCO3　H2O　　α-Fe2O31　,K,Fe2+、K+/SO2-4、Cl-,KClFeSO42A(FeSO4·K2SO4·6H2O)。2　20℃Fe2+、K+/SO2-4、Cl-:2KCl+2FeSO4·7H2O=FeSO4·K2SO4·6H2O+FeCl2+8H2O(1)2(2B),。2KCl+FeSO4·K2SO4·6H2O=2K2SO4+FeCl2+6H2O(2)1FeCl2NH4HCO33:FeCl2+2NH4HCO3=FeCO3+2NH4Cl+CO2+H2O(3)FeCO3+H2O=Fe(OH)2+CO2(4)3、4CO296%,,,≥99%。3NH4Cl,。:42　　　20006183DOI:10.13205/j.hjgc.2000.03.0162Fe(OH)2+12O2=2α-FeOOH+H2O(5)α-FeOOH,。2α-FeOOHα-Fe2O3+H2O(6)2.2　实验原料及分析方法FeSO4·7H2O:,KCl,NH4HCO3:。ZBG-21006,GB1863-83,GB10621-89。GB2946-89。3　,4。1、2,(Da),,。KK2O、、,[4],K≥88%,K2O47%～51%。3,,。4[5],,。3、4,,35℃。FeCO3,,,。1　/g·(L·min)-1302010D50/μm55.0267.1376.88　　35℃,LS601。35℃30g/L·minFeCO33。3　FeCO3,,,,,。Fe2+,,Fe3O4,[6],35～45℃。,5。Fe2+,,,,,。≥270℃α-FeOOHFe2O3,500℃,,α-FeOOH。550～650℃。,,。,,1、2,3。4　,、、、4,,,,。,,1t。2　/t/0.8610751.82701.06477、、、334802012437　　1t,0.44t,0.6t0.2t:2200/t,1800/t,650/t,1000/t,3358,。43　　　200061831　JP1992-0463209(9263209).2　..,1995.(8):41～42.3　JP1989-01254214(89254214)4　..,2000.(2):72～75.5　.α-.,1999.(1):9～10.6　..,1992.(10):6～10.　,,19534,1982,,。。1999-10-11曹　飞　郭　成　韦　萍　欧阳平凯(,210009)　　　以硅烷化粉煤灰为载体,戊二醛为交联剂,交联法固定化自制胰脂肪酶,考察了固定化时间、给酶量、戊二醛浓度对固定化酶活力的影响,并着重研究了固定化胰脂肪酶的热稳定性。固定化酶在55℃仍可保持较高的酶活。　硅烷化粉煤灰　胰脂肪酶　固定化1　(PancreaticLipase),、、、。,,。。,,,,。,,,,[1、2]。,,,,,。2　2.1　材料()、(40～200μm)、、25%、、(5500～7500)。2.2　实验方法2.2.1　[3、4]:():,。/,,3,,3,,。48h。/25℃30min。4000r/min。60%,6000r/min。,,8000r/min,。2.2.2　[5、6]、,4h,,,。、γ-,24h1h,,1h,。0.5h,,,。2.2.3　[7、8]、、(pH7.5),5h,25%,5h,,44　　　20006183ASUPPLEMENTTOTHEPAPER“STUDYOFTREATMENTOFFERROUSSULFATEHEPTAHY-DRATE”ZhengDianmoetal(42……………………………………………………………………………………)Abstract　Atechniqueofjointproductionofpotassiumsulfate,ironoxidered,ammoniumchlorideandliquidcarbondioxideusingferroussulfateheptahydrateisresearched.Thetechniquedoesnotproducethesecondarypol-lution.Itisindicatedbytheresultsthattheoxidizingreactiontemperatureof35～45℃,calciningtemperatureof550～650℃andoxidationphaseboundaryoflargeareaarethesuitableconditionsforensuringthequalityoftheironoxidered.Keywords　ferroussulfateheptahydrate,secondarypollutionandcalciningtemperatureIMMOBILIZATIONOFPANCREATICLIPASEONSILANIZEDFLYASHCaoFeietal(44……………)Abstract　Apancreaticlipasewascrosslinkedonthesilanizedflyashbyglutaraldehyde.Theeffectsofthere-acttime、amountoflipase、andconcentrationofglutaraldehydeontheactivityoftheimmobilizedlipasewerestud-ied;andthethermalstabilityoftheimmobilizedlipasewasemphaticallystudied.At55℃,theactivityoftheimmo-bilizedlipasewasalsoremainedatahighlevel.Keywords　silanizedflyash,pancreaticlipaseandimmobilizationSTUDYOFSOLIDIFICATIONTREATMENTOFSLUDGECONTAININGCOPPERFROMPRINTEDCIRCUITBOARDPLANTShiTaihongetal(47………………………………………………………………)Abstract　ThesolidificationcharacteristicsofthesludgecontainingCu2+fromaprintedcircuitboardplantby425#cementareinvestigated.Theresultshowsthattheresultofsolidificationisgood,theleachingconcentrationofCu2+ofthesampleswithvariouschangeratiosislowerthanthenation'sallowedextractedstandard,andthecompressionstrengthofthesampleswassatisfiedandincreasedwiththeadditionofNaSiO3and(NH2)2CS.Thesolidificationproductcanreachtherequirementsofnaturaldurnpingorasaroadconstructingmaterial.Keywords　cementsolidification,limecoagulationandheavymetalIMPROVEMENTOFTHETESTINGMETHODSOFHYDROLYSISDEGREEOFPARTLYHY-DROLYZEDCOLLOIDALPOLYACRYLAMINDEWangAiyietal(50……………………………………)Abstract　Theimprovmentandtheimplementaryprocessoftestingmethodsofthehydrolysisdegreeofapartlyhydrolysiscolloidalpolyacrylamindeareproposedaccordingtoalargenumberofexperimentaldata.Com-paredwithstandardmethods,themethodinvolvedinthearticleissimpleandconvenient,scientificandapplicableandithaspracticalsignificanceandpopularizingvaluesforthedeterminationofthesolidcontentandhydrolysisde-greeofpartlyhydrolyzedcolloidalpolyacrylaminde.Keywords　polyacrylaminde,solidcontentandhydrolysisdegreeEXPLORATIONOFMETHODFORDETERMINING“CHLOROPHYLL(A)”INPRODUCTIVEFORCESSiDayingetal(52………………………………………………………………………………………)Abstract　Thispaperexplores,improvesandverifiesthemethodfordetermining“chlorophyll(a)”intheproductiveforces.Theaccuracyrangeofthismethodis6.1%～8.4%.Ithasbeenprovedbyanexperimentthatitfeaturessimplicity,fastnessandprecisenessetc.Keywords　biologicalmonitoring,biomass,floatingalgae,determinationofproductiveforceandchlorophylla5ENVIRONMENTALENGINEERINGVol.18,No.3,June,2000