简介：Thepursuitofhighoilrecoveryratehasbeenapersistentobjectiveforoilindustry.Pseudomonassp.LP-7andBacillussp.PAH-2wereisolatedfromoil-contaminatedsurfacesoilsamplesofanoilfield.Theantimicrobialdegradationrates(ADRs)ofpolymersachievedbyLP-7andPAH-2wereevaluatedatatemperatureof35°Cinthemineralsaltmediaduringtheshakenflasktrial.TheADRsofcopolymersynthesizedbyusingasurfactantwithaconcentrationof5%couldreach8.4%forPAH-2and15.3%forLP-7.TheADRsofcopolymercouldreach10.4%forPAH-2and21.3%forLP-7,whenthepolymerconcentrationwas2g/L.AllresultsconfirmedthattheADRsofcopolymersincreasedwithanincreasingcontentofHDDE(capsaicinderivativemonomer)inthepolymer.ThecopolymersalsomanifestedexcellentantimicrobialdegradationperformanceinthepresenceofCu2+,Zn2+,andPb2+ions,respectively,whichhadgreatpotentialforapplicationsinenhancedoilrecovery.

简介：Inthisresearch,thedegradationofdibenzothiophene(DBT)wasinvestigatedbyusingPseudomonassp.LKY-5isolatedfromoilcontaminatedsoil.Theresponsesurfacemethodology(RSM)basedontheBox-Behnkendesign(BBD)wasappliedforevaluatingtheinteractiveeffectsoffourindependentvariablesincludingsubstrateconcentration,temperature,pHandagitationrateontheDBTremovalresponse.Atotalof29experimentsforfourfactorsatthreelevelswereconductedinpresentstudy.Asecond-orderregressionmodelwasthendeveloped,andtheanalysisofvariance(ANOVA)illustratedthattheproposedquadraticmodelcouldbeutilizedtonavigatethedesignspace.Thevalueofdeterminationcoefficient(R2=0.9534)indicatedasatisfactoryagreementbetweenthequadraticmodelandtheexperimentaldata.ItwasfoundthatDBTremovalwasmoresignificantlyaffected(P<0.0001)bysubstrateconcentrationcomparedwithotherthreeparameters.An100%degradationofDBTcouldbeobtainedbyPseudomonassp.LKY-5atasubstrateconcentrationof100mg/L.