简介：Bothinorganicandorganicpillaredmontmorilloniteswereusedtoadsorbphenol.BatchkineticsandisothermstudieswerecarriedouttoevaluatetheeffectofequilibriumtimeandpHonadsorptionofphenolbymontmorillouitesandre-adsorbingcharacteristicsofpillaredmontmorillonites.TheadsorptionofphenolincreasedwithincreasingsolutionpHvalues.Theeliminationratioofphenolfromthesolutionbytheabsorptionoforganicmodifiedpillaredmontmorillonite(OrPMt)reachedequilibriumquicklyaftervibratingfor5minutes.Meanwhilefororganicmontmorillonite(OrMt),pillaredmontmorillouite(PMt)andmontmorillonite(Mt),thetimetoreachphenol-absorptionequilibriumwere20,30and90minutes,respectively.Theadsorbingcapacityofthepillaredmontmorillonitemodifiedwithsurfactantimprovedgreatly.Thephenol-adsorbingcapacityofpillaredmontmorillonitesmainlydependedonmicroporousstructureandsurfacecomponentofthemodifiedclays.Aftercalcinationat500℃,thepillarstructureandthebasalspacing(1.83nm)werestillstable.Sothepillaredmontmorillonitecouldberecycled,anditwasapotentialmaterialforadsorbingenvironmentalpollutants.

简介：Thispaperusingfinitedifferenceschemeforthenumericalsolutionofadvection-dispersionequationdevelopsaone-dimensionalwaterqualitymodel.ThemodelalgorithmhassomemodificationoverothersteadystatemodelsincludingQUAL2E,whichhavebeenusedsteadystateimplementationofimplicitbackward-differencenumericalscheme.Thecomputerprograminthedevelopedmodelcontainsaspecialunsteadystateimplementationoffourpointimplicitupwindnumericalschemesusingdoublesweepmethod.Thesuperiorityofthismethodinthemodelingprocedureresultsthesimulationefficacyundersimplifiedconditionsofeffluentdischargefrompointandnon-pointsources.Themodelishelpfulforeyeviewassessmentofdegreeofinteractionbetweenmodelvariablesforstrategicplanningpurposes.ThemodelhasbeenappliedforthewaterqualitysimulationoftheHanjiangRiverbasinusingflowcomputationmodel.Modelsimulationresultshaveshownthepollutantsprediction,dispersionandimpactontheexistingwaterquality.Modeltestshowsthemodelvaliditycomparingwithothersophisticatedmodels.Sensitivityanalysiswasperformedtooverviewthemostsensitiveparametersfollowedbycalibrationandverificationprocess.

简介：Themainremovalmechanismsforthedegradationsofsevenpollutantsinwastewatertreatmentwetlandswereanalysed,andamathematicalmodelwasestablishedtoquantifytheremovalofeachpollutant,basedonitsmainremovalmechanisms.Subsurfacehorizontalflowwetlandsweretreatedasaseriesofcontinuousstirred-tankreactors(CSTRs).Kineticmodelsfortheremovalofbiochemicaloxygendemand,chemicaloxygendemand,ammonia,totalnitrogenandfaecalcoliformswereestablishedbycombiningMonodorfirst-orderkineticswithCSTRassumptions.Thesetentativemodelsaccountforawiderangeoffactorsthataffectwetlandperformance,butthemodelshavenotbeenprovenbyexperimentdata.Dependingonthederivationofvariouscoefficientsinthemodelsandverificationbyactualperformancedata,thisstudymayprovideastartingpointforanintegratedpollutantremovalmodeltobedeveloped,andexperimentallyverified,therebymakingastepforwardfromthecurrentgreenbox'approachofwetlanddesign.

简介：Basedonthestatisticsofsurfacedrifterdataof1979–2011andthesimulationofnuclearpollutantparticulatemovementssimulatedusinghighqualityoceanreanalysissurfacecurrentdataset,thetransportpathwaysandimpactstrengthofFukushimanuclearpollutantsintheNorthPacifichavebeenestimated.Theparticulatesareusedtoincreasethesamplingsizeandenhancetherepresentativenessofstatisticalresults.Thetrajectoriesofthedriftersandparticulatesarefirstexaminedtoidentifytypicaldriftingpathways.Theresultsshowthattherearethreetypesoftransportpathsfornuclearpollutantsatthesurface:1)mostpollutantparticlesmoveeastwardandarecarriedbytheKuroshioandKuroshio-extensioncurrentsandreachtheeastsideoftheNorthPacificafterabout3.2–3.9years;2)someparticlestravelwiththesubtropicalcirculationbranchandreachtheeastcoastofChinaafterabout1.6yearsaccordingtoonedriftertrajectoryandabout3.6yearsaccordingtoparticulatetrajectories;3)alittleofthemtravelwithlocal,smallscalecirculationsandreachtheeastcoastofChinaafterabout1.3–1.8years.Basedontheparticulates,theimpactstrengthofnuclearpollutantsatthesetimescalescanbeestimatedaccordingtothetemporalvariationsofrelativeconcentrationcombinedwiththeradioactivedecayrate.Forexample,Cesium-137,carriedbythestrongNorthPacificcurrent,mainlyaccumulatesintheeasternNorthPacificanditsimpactstrengthis4%oftheinitiallevelattheoriginatingFukushimaareaafter4years.Duetolocaleddies,Cesium-137inthewesternNorthPacificis1%oftheinitialpollutantlevelafter1.5yearsandcontinuouslyincreasesto3%after4years.Theverticalmovementofradioactivepollutantsisnottakenintoaccountinthepresentstudy,andtheestimationaccuracywouldbeimprovedbyconsideringthree-dimensionalflows.

简介：Anenvironmentalcapacitymodelforthepetroleumhydrocarbonpollutions(PHs)inJiaozhouBayisconstructedbasedonfieldsurveys,mesocosm,andparallellaboratoryexperiments.SimulatedresultsofPHsseasonalsuccessionsin2003matchthefieldsurveysofJiaozhouBayresaonablywellwithahighestvalueinJuly.TheMonteCarloanalysisconfirmsthatthevariationofPHsconcentrationsignificantlycorrelateswiththeriverinput.Thewaterbodyinthebayisreasonablysubjectedtoself-purificationprocesses,suchasvolatilizationtotheatmosphere,biodegradationbymicroorganism,andtransporttotheYellowSeabywaterexchange.TheenvironmentalcapacityofPHsinJiaozhouBayis1500tonsperyearIFtheseawaterqualitycriterion(GradeⅠ/Ⅱ,0.05mgL-1)intheregionistobesatisfied.Thecontributiontoself-purificationbyvolatilization,biodegradation,andtransporttotheYellowSeaaccountsfor48%,28%,and23%,respectively,whichmakethesethreeprocessesthemainwaysofPHspurificationinJiaozhouBay.

简介：学习特殊为对器官、无机的污染的评价提供一条基线，在Pyeongchang河的表面沉积的重金属污染，南朝鲜。对学习区域的评价用完了尊重到金属污染负担，生态的风险和geoaccumulated风险。在使用的索引之上基于，一个优先级索引(Pindex)被用来评价最大的污染地点。尽管在所有沉积的水银的集中在指南下面，重要充实的污染被所有应用索引观察。是期望，污染负担索引(PLI)的价值，生态的风险索引(RI)和表明的geoaccumulation风险索引(Igeo)在在上游的区域降低重金属污染与相比下游。无可否认地，沉积对未受污染根据PLI稍微弄脏当到极其高生态的风险的高度在几件沉积样品被观察时。而且，所有样品作为每Igeo没有被污染。在Igeo的简化以后，Pindex证明最大可能与2.537的价值污染了沉积。尤其是，保护的措施应该被带去被Pindex优先考虑的高度污染的区域。无可否认地，全部的器官的碳的最大的集中，全部的氮，无机的氮，全部磷，无机磷，钙，镁，钠和钾显著地作为7.8椠?被观察?潣摬猠敷？

简介：Thetraditionalevaluationofenergyconsumptionmostlyintroducespollutantsasanegativeeconomicoutputintoevaluatingmodel,ignoringtheconfigurationrelationshipamongtheenergyinput,pollutantsaswellaseconomicoutput.Thispaperconsiderstheoverallprocessofenergyconsumptionandconstructsanevaluationindicationsystemofenergyconsumptionlevelcombinedwithendogenouspollutantsbasedonentropytopsismethod,thenmakesempiricalresearch.TheresultsshowthatChina'senergyconsumptionlevelpresentsafluctuantriseinthepremiseofemission.Energyconsumptionleveldependsontherelationshipamongenergyinput,pollutantsandeconomicoutput.Theraiseofenergyconsumptionlevelshouldnotincreaseeconomicoutputandreducepollutantemissionattheexpenseofenvironment.Finally,thewholepaperputsforwardthecountermeasurestoimprovetheoveralllevelofenergyconsumption.

简介：Thepresentpaperdescribesthestatisticalmodelingandoptimizationofamultistagegas-solidfluidizedbedreactorforthecontrolofhazardouspollutantsinfluegas.Inthiswork,westudythehydrodynamicsofthepressuredropandminimumfluidizationvelocity.Thehydrodynamicsofathree-stagefluidizedbedarethencomparedwiththoseforasingle-stageunit.Itisobservedthatthetotalpressuredropoverallstagesofthethree-stagefluidizedbedislessthanthatofanidenticalsingle-stagesystem.However,theminimumfluidizationvelocityishigherinthesingle-stageunit.Underidenticalconditions,theminimumfluidizationvelocityishighestinthetopbed,andlowestinthebottombed.Thissignifiesthatthebehaviorofsolidschangesfromawell-mixedflowtoaplug-flow,withintermediatebehaviorinthemiddlebed.

简介：Inthisstudy,one-dimensionaltitaniananotubes(TNTs)weresynthesizedusingacombinedprocessofchemicalandhydrothermaltreatments,andtheiractivitiesforthephotocatalyticreactionsofselectedgaseouspollutantsatsub-ppmlevelsweredetermined.Additionally,thepropertiesoftheTNTswereexaminedusingselectedspectroscopicmethods.TheannealedTNTsshowedhigherphotocatalyticactivitiesforthefourtargetcompoundsthandidtheunannealedTNTs.Forallthetargetcompoundsexceptbenzene,theeffectoftheannealingtemperatureonthedegradationefficiencywasdifficulttodeterminebecausealldegradationefficiencieswereveryhigh.However,forbenzene,whichdecomposedwithalowefficiency,thedegradationactivitiesoftheTNTsincreasedasthetreatmenttemperaturewasincreasedfrom250to300℃,whiletheydecreasedslightlywhenthetemperaturewasincreasedfrom300to400℃.ThesefindingsconfirmthepresenceofanoptimalannealingtemperatureforthesynthesisofTNTs.Moreover,theaveragedegradationextentsforbenzene,toluene,ethylbenzene,ando-xylenedecreasedfrom92%,96%,99%,and98%to77%,86%,92%,and94%,respectively,astheairstreamflowrateincreasedwithintherangeof1-4L/min.Theaveragedegradationextentsdecreasedfrom12%,75%,87%,and88%to3%,29%,46%,and51%,respectively,astheinputconcentrationincreasedfrom0.4to1.9ppm.Overall,thesefindingssuggestthatone-dimensionalTNTscanbeeffectivelyutilizedforthedegradationofgaseouspollutantsunderoptimaloperationalconditions.

简介：无

简介：有磁力地活跃，订并且稳定的mesoporous碳与部分，graphitized网络和可控制的表面wettability(PR-Fe-P123-800和PR-Ni-P123-800)通过Fe或Nifunctionalized的直接碳化被综合了，并且在800点订了mesoporous聚合物