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1.
IntroductionPolyaluminiumchloride(PAC) ,akindofinorganicpolymerflocculant,iswidelyusedinwaterandwastewatertreatment.InordertoincreasethecoagulationeffectofPACandimprovethequalityofPACproduct,itisnecessarytoraisethedegreeofpolymerizationofPAC .Generally ,t…  相似文献   

2.
Amethodforcalculatingthetotalozoneamountintheclearskies¥BaiJianhui;WangGengchen(InstituteofAtmosphericPhysics,ChineseAcademyo...  相似文献   

3.
加利福尼亚谷地与大烟雾CaliforniavtheBigSmog¥Abstract:California,particularlyLosAugeles,encapsulatesAmerica'ssuccessesandfailures:thecari...  相似文献   

4.
UnitedNationshavementionedthatover30Euro pean,CentralAsianandNorthAmericancountrieshaveagreedapactextendingthepublic'srighttoknowaboutchemicalwasteandtoxicpollutantsintheirareas.Afterovertwoyearsofnegotiationsthedraftagree mentwillcoverthedisposal,sto…  相似文献   

5.
IntroductionA .tatarinowiiScott,aperennialimmergedherbinwetlands ,belongstoAraceae ,Acorus.ItsflorescencewasfromApriltoJulyanditsrhizomewasfragrant.ItisdistributedovertheSouthpartofChina ,EastIndian ,VietnamandNorthThailand .Itwascommoninwetlands ,brooksorth…  相似文献   

6.
污染防治的会计学AccountingforPollutionPrevention¥AlienL.WhiteAbstract:IfaccountingpracticesmisrepresentthetrueProntallilityofpreventi...  相似文献   

7.
ResearchCenterforEco EnvironmentalSciences,ChineseAcademyofSciences (RCEES CAS ) ,formerlyInstituteofEnvironmentalChemistry ,ChineseAcademyofSciences ,wasfoundedin 1975 .In 1986,itwasamalgamatedwithResearchCenterofEcology ,CAS ,andwasrenamedasResearchCenterforEco E…  相似文献   

8.
Introductionα naphthaleneaceticacid (NAA)isanimportantplantgrowthregulatorusednotonlytopreventthepreharvestdropofapplesbutalsoasafruitthinningagent (Worthing ,1991) .MuchresearchworkabouttheeffectofNAAonplanttissues(Speer,1993;Hideyoshi,1993;Prasd ,1994 ) ,plantgrowtha…  相似文献   

9.
AcomparativeassessmentofalternativeapproachestosustainabledevelopmentPanJiahuaInstituteofWorldEconomicsandPolitics,ChineseAca...  相似文献   

10.
ResearchFields :AquaticEnvironmentalQualityItistodevelopadvancedsciencesofwaterqualityprocessandhightechnology ,studythemechanismsofwaterqualityprocessofnaturalwatersandwatertreatment.Aswellastodevelophightechnologyandtechniquesforwatertreatment,soastop…  相似文献   

11.
全球工业事件与事故IndustrialIncidentsandAccidentsintheWorld¥Abstract:Industrialincidentsandaccidentsusuallyincreasealongwithindustrial...  相似文献   

12.
1 IntroductionIntegratedenvironmentalassessment(IEA)isafundamentalmeansforcomprehensiveenvironmentalmanagementandforcoordinatingtherelationshipbetweeneconomicdevelopmentandenvironmentalprotection.IEAaimstoidentifythemainenvironmentalproblemsinaregion…  相似文献   

13.
农业活动引起的污染   总被引:1,自引:0,他引:1  
农业活动引起的污染联合国环境规划署PollutionDuetoAgriculturalActivities¥(UNEP)EARTHWATCHAbstract:Theagriculturalproductionneedsasoundenvironmen...  相似文献   

14.
Agricultural adaptation to climate change in China   总被引:4,自引:0,他引:4  
IntroductionAdaptationreferstoeffortstoreducesystem’svulnerabilitiestoclimate.Amongthemostfrequentlycitedhumansystemslikelytobeaffectedbyclimaticchangeisagriculture.Itisespeciallysensitivetotheconsequencesofglobalwarmingasitreliesheavilyontheweatheran…  相似文献   

15.
IntroductionThispaperconcernstheadaptationandapplicationofamesoscalemeteorologicalmodelforgeneratingthewindfieldsandothermeteorologicalparametersforfuturestudiesofairpollutioninthecomplexterrainofHongKongSpecialAdministrativeRegion (HKSAR) .Themainarea…  相似文献   

16.
AcumulationofheavymetalsintwocropsedsduetosoilcontaminationasdeterminedbyneutronactivationanalysistechniquesM.F.AbdelSabourS...  相似文献   

17.
EffectofaluminumonNADkinaseactivityinchloroplastfractionfromleavesofriceseedlingsLiuJinqi;LiuHoutian(ChineseResearchAcademyof...  相似文献   

18.
1 IntroductionPolycyclicaromatichydrocarbons(PAHs)containtwoormorearomaticringswhichfusedtogetherindifferentpossiblearrangements ,thusnumerousPAHs,theirisomers,andtheirderivativesaretheoreticallypossible.Becausemanyofthemandtheiranalogsarestronglypotentc…  相似文献   

19.
IntroductionBeforethe 1 980sconventionaltreatmentprocessesofphenolswastewateraresolventextraction ,physicaladsorption ,chemicaloxidationandaerobicbiologicalprocess.Amongthebiologicalunitprocessesactivatedsludgeprocessismainone.Afterthe 1 980sanaerobicbiologic…  相似文献   

20.
CharacteristicsofdistributionofheavymetalsinsedimentofLeAnRiverLiQi(ResearchCenterforEco-EnvironmentalSciences,ChineseAcademy...  相似文献   

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