2632007 6 四 川 环 境SICHUANENVIRONMENT Vol.26,No.3June2007··:2007-03-05: (1983-),,,2005,。KClO3PFS黄 珊,李正山,潘 科(, 610065) :聚合硫酸铁是一种高效无机高分子絮凝剂,在水处理领域中应用极其广泛。本文探索了以FeSO4·7H2O为原料,通过试验选择了以KClO3为氧化剂制备PFS,同时考察了氧化剂用量、反应温度、反应时间以及投料方式等因素对氧化过程的影响。 :;:X703 :A :1001-3644(2007)03-0005-03StudyontheOxidationReactionofthePreparationofPFSbyKaliumChlorateHuangShan,LiZheng-shan,PanKe(CollegeofArchitectureEnvironment,SichuanUniversity,Chengdu610065,China) Abstract:Poly-ferricsulfate(PFS)asasortofhighefficientinorganicpolymerflocculantsiswidelyappliedforwatertreatment.Inthispaper,atrialofprocesstomakePFSusingFeSO4·7H2Owasconducted,bychoosingKClO3astheoxidant.Meanwhile,thefactorsaffectingtheoxidationsuchasreactiontemperature,reactiondurationandthedosagesaswellasthechargingwayofoxidantwereexplored.Keywords:Poly-ferricsulfate;oxidation (PFS)80,、、pH(4~10)。[Fe2(OH)n(SO4)3-n/2]m,(n2,m10),[Fe(OH)x](3-x)+,[Fem(OH)x]n(3m-x)n+,,,、、、,、、,、、、。,,,、、,[1,2]。20,PFS[3,4]:(H2O2、NaClO)、(HNO3、NaNO2)、、,,,。KClO3。,、,,,,。1 反应原理 :6Fe2++6H+O6Fe3++3H2O(1),,。:Fe2(SO4)3+nH2OFe2(OH)n(SO4)3-n/2+n/2H2SO4(2):DOI:10.14034/j.cnki.schj.2007.03.002m[Fe2(OH)n·(SO4)3-n/2][Fe2(OH)n·(SO4)3-n/2]m(3):n2,m10,PFS,,,[SO2-4]/[Fe3+]=1.2~1.5,。,,,,PFS。2 试验部分2.1 :H2SO4(AR);FeSO4·7H2O(AR);KClO3(AR)。:721;TN100B;1kw。2.2 ()1 Fig.1 TheflowforPolyferricsulfatereaction3 试验结果与讨论3.1 15℃FeSO4·7H2O,,2h,1。1 Tab.1 Theeffectofoxidanttypeonoxidizationrate(%)KClO3()88.61H2O276.72 ,H2O2,,H2O2,,KClO3。3.2 15℃FeSO4·7H2O,KClO3,,2。2 Tab.2 Theeffectofreactiontimeonoxidizationrate(min)(%)2072.464079.456087.878088.2412088.61 ,,,,,,20min,70%,,,,。,90%,。,25℃,,,。,,,。3.3 FeSO4·7H2O,KClO3,2h,3。3 Tab.3 Theeffectofreactiontemperatureonoxidizationrate(℃)(%)1588.612591.553598.61 ,,,,。,:k=Ae-Ea/RT(4)A,,,,。,6 四川环境26,,,。,,。2,25℃35℃90%,,,,1h。3.4 25℃FeSO4·7H2O,KClO3,2h,4。4 Tab.4 Theeffectofoxidantdosageonoxidizationrate/KClO3()%12.098.5711.598.6111.098.6410.599.9410.099.956Fe2++ClO-3+6H+=6Fe3++Cl-+3H2O E0ClO3/Cl-=1.45V,E0Fe3+/Fe2+=0.79V,Fe2+Fe3+,/KClO3=13.5。。,Fe2+Fe3+,Fe3+,ClO-3Fe2+,ClO-3Cl-Cl2,KClO3。3.5 25℃FeSO4·7H2O,KClO3,2h,5。 ,。,,;,KClO3,。5 Tab.5 Theeffectofsulfuricaciddosageonoxidizationrate%80.0891.564 结 论4.1 PFS,2h,,,,/KClO310.5,[SO2-4]/[Fe]=1.3,。4.2 KClO3,H2O2。KClO3,,,。4.3 ,Cl-、K+,,;,。:[1] .[J].,2004,24(9):83-84.[2] WPCheng,CHuang.23rdWastewaterTreatmentTechnologyConference[J].Taiwan,21-22November1998:491.[3] ,,.[J].,2000,1(5):21-27.[4] ,,.[J].,2002,22(10):18-21.[5] ,,,.[J].,2002,10(5):7-10.[6] ChengWP.Hydrolysischaracteristicofpolyferricsulfatecoagu-lantanditsoptimalconditionofpreparation[J].Physicochemi-calandEngineeringAspects,2001,182(1~3):57-63.73 :KClO3PFS