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1.
Informational uncertainties of risk assessment about accidents of chemicals   总被引:3,自引:0,他引:3  
IntroductionTheaccidentalriskassessmentofthechemicalsisafrontierscienceandtechnologyreferredtobothenvironmentalscienceandsafetytechnology .Inrecentyearsmanyresearchworkersinthisfieldhavedoneit.Theanalysisofchemicalaccidentsmainlyincludedthattheleakage…  相似文献   

2.
IntroductionWatercontaminantsincludealargenumberofchemicalsrangingfromaromatichydrocarbons,organicsolvents,pesticidesandmetals.Heavymetalcontaminationiscommonlyfoundinareaswhereindustrialeffluentsaredischargedintonaturalwaters .Theharmfuleffectsofsuchm…  相似文献   

3.
IntroductionInrecentyears,moreandmoreevidencesshowthatgreenhousegasesemissionshavebeguntoinfluenceglobalclimate.Greenhouseeffectisoneofthemostrigorouschallengesnowadaysweface.Sincebothcauseandimpactofclimatechangeareglobal,thewholeworldshouldtakeacti…  相似文献   

4.
IntroductionHeatwhichistransmittedthroughwalls ,eitherduringthedayorretainedbythewallsandtransmittedatnightbytheprocessesofconductionandradiationisoneofthefactorscausingdiscomfortininteriorspacesinthetropicalregion .Theeffectofthisheatcouldbeminimizedo…  相似文献   

5.
Aproblemwhichfrequentlyarisesinthestudyofkineticsisthehighdegreeofcouplingofthereactionsystem .Forexample ,inmanyrealisticchemicalprocesses,particularlythoserelatedtoatmosphericchemistry ,combustionphenomena,petrochemistry ,industrialprocess,thenumberofre…  相似文献   

6.
1 IntroductionChinaisundergoingsubstantialandrapidchangesinitssocietyanditseconomicpolicies.Amongvariousenvironmentalproblems,waterpollutionisoneofthemostcriticalissuesfacingChinatoday.Thesepollutantspoisonaquaticorganismsandaccumulateinfishandothere…  相似文献   

7.
IntroductionHealthhazardsfrommercuryintheenvironmenthavecausedrestrictionsintheuseofmercuryandastrictercontrolofthereleaseofmercuryfromindustrialandotheruses.Butatthesametimethesesourcesofmercuryhavebeensubjectedtoregulation ,twonewsourceshaveappeared …  相似文献   

8.
1 IntroductionPolycyclicaromatichydrocarbons(PAHs)containtwoormorearomaticringswhichfusedtogetherindifferentpossiblearrangements ,thusnumerousPAHs,theirisomers,andtheirderivativesaretheoreticallypossible.Becausemanyofthemandtheiranalogsarestronglypotentc…  相似文献   

9.
Naturalresources(landform ,geology ,hydrology,creature ,ecologyetc .) ,humanresources (culture ,economy,locationetc .)andlandscapeecologicalspatialstructureofacertainplacecandetermineitsdevelopmentpatternsandlandscapearchitectureaswellasitslimitationofdevelopm…  相似文献   

10.
IntroductionForlasttwodecades,awaveoftheexperimentalconsciousnessisbeingdevelopedindevelopingcountriesincludingIndia.Moderntechnologyhavebeencreatedenvironmentalpollutant,ofwhichnoiseisconsideredastheworstenemyofhumanhealthandacurseofoursociety .Noisei…  相似文献   

11.
ResearchFields :AquaticEnvironmentalQualityItistodevelopadvancedsciencesofwaterqualityprocessandhightechnology ,studythemechanismsofwaterqualityprocessofnaturalwatersandwatertreatment.Aswellastodevelophightechnologyandtechniquesforwatertreatment,soastop…  相似文献   

12.
IntroductionWastewaterdischargedfromtextiledesizing processesischaracterizedbyitsveryhighchemicaloxygendemand(CODCr)andisoneofthemostdifficulttextilewastewatertotreat.Thedesizingwastewaterfromnaturalfibre processingoperationsmainlycontainsstarch ,glucos…  相似文献   

13.
IntroductionRecently,someinstallationswithspecialconstructionforextractingcontaminantgas,suchasanexhausttoweroftheundergroundtunnel,etc.weresetupinurbanandindustrialcomplexareas.Theeffectsoftheseconstructionsontheflowandtherebyonthelocaldispersionoft…  相似文献   

14.
IntroductionHydrolysisisthereactionofchemicalswithwaterandalsoanimportantenvironmentalprocessoforganicpollutants.Hydrolysisofsyntheticorganiccompoundsoccursviaseveralpathwayswhichinvolvethespecific acid , baseandneutralprocesses.Inaddition ,waterdissocia…  相似文献   

15.
IntroductionBeforethe 1 980sconventionaltreatmentprocessesofphenolswastewateraresolventextraction ,physicaladsorption ,chemicaloxidationandaerobicbiologicalprocess.Amongthebiologicalunitprocessesactivatedsludgeprocessismainone.Afterthe 1 980sanaerobicbiologic…  相似文献   

16.
IntroductionMostsoilpollutionsituationsinvolveseveralpollutantsactingsimultaneously .Thepracticalassessmentoftheoveralltoxicityhasthereforeremainedamajorproblem .AmongthenegativeeffectsofexplorationandproductionactivitiesinoilproducingcommunitiesinNige…  相似文献   

17.
IntroductionInaquaticecosystemsbiologicalcommunitiesareremarkablycomplexinboththeiroperationandresponsetoanthropogenicactivities.Thishasledmanyinvestigatorstoconductlaboratoryandfieldstudiesforevaluatingtheecologicalriskposedbyhumanstoecosystem(Cairns…  相似文献   

18.
An evaluation of mercury emissions from the chlor-alkali industry in China   总被引:3,自引:0,他引:3  
1 IntroductionThechlorine alkaliindustryisoneofthesubstantialpartsofthechemicalindustry .Now ,threetypesofelectrolyticcellsareusedtoproducechlorinegasandcausticsoda:theHgcell,thediaphragmcell,andthemembranecell.Chinaisusingthediaphragmcellasthemaintype.Na…  相似文献   

19.
IntroductionRapidandsensitiveanalyticalmethodsforthedeterminationofmercuryandrelatedcompoundsinenvironmentalsamplesareimperativelydemandedsincevariouschemicalformsofmercuryinthenaturalenvironmentcanbehavedifferently ,therebyaffectingitsbiogeochemicalb…  相似文献   

20.
IntroductionRecognitionofmercuryasatrans nationalboundarypollutantandthediscoveryofthenegativecorrelationbetweenfishmercurylevelsandwaterpHanditsimplicationwithregardtoacidrainhavegeneratedalotofinterestinscientificresearchonenvironmentalmercuryconta…  相似文献   

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