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1.
ZHANG Yi-xian 《环境科学学报(英文版)》2001,13(1):69-74
IntroductionTheaccidentalriskassessmentofthechemicalsisafrontierscienceandtechnologyreferredtobothenvironmentalscienceandsafetytechnology .Inrecentyearsmanyresearchworkersinthisfieldhavedoneit.Theanalysisofchemicalaccidentsmainlyincludedthattheleakage… 相似文献
2.
Random walk modeling of wake dispersion for the exhaust tower of an underground tunnel in urban area 总被引:1,自引:0,他引:1
IntroductionRecently,someinstallationswithspecialconstructionforextractingcontaminantgas,suchasanexhausttoweroftheundergroundtunnel,etc.weresetupinurbanandindustrialcomplexareas.Theeffectsoftheseconstructionsontheflowandtherebyonthelocaldispersionoft… 相似文献
3.
LAO Shan-gen 《环境科学学报(英文版)》2002,14(1):132-135
IntroductionBeforethe 1 980sconventionaltreatmentprocessesofphenolswastewateraresolventextraction ,physicaladsorption ,chemicaloxidationandaerobicbiologicalprocess.Amongthebiologicalunitprocessesactivatedsludgeprocessismainone.Afterthe 1 980sanaerobicbiologic… 相似文献
4.
IntroductionWatercontaminantsincludealargenumberofchemicalsrangingfromaromatichydrocarbons,organicsolvents,pesticidesandmetals.Heavymetalcontaminationiscommonlyfoundinareaswhereindustrialeffluentsaredischargedintonaturalwaters .Theharmfuleffectsofsuchm… 相似文献
5.
IntroductionInaquaticecosystemsbiologicalcommunitiesareremarkablycomplexinboththeiroperationandresponsetoanthropogenicactivities.Thishasledmanyinvestigatorstoconductlaboratoryandfieldstudiesforevaluatingtheecologicalriskposedbyhumanstoecosystem(Cairns… 相似文献
6.
John Gregory 《环境科学学报(英文版)》1999,11(3):328-333
1 IntroductionParticlesinnaturalwatersareoftentoosmalltobeeffectivelyremovedbytheseseparationtechniques.Theprocessofcoagulation/flocculationcausesfineparticlestoaggregateintolargerunits(flocs)whichcanbemoreeasilyseparated.Inwatertreatmentsaltsofalumi… 相似文献
7.
Analysis on the long term discharge of a catchment 总被引:1,自引:0,他引:1
IntroductionItiswellknownthatthecharacteristicsofthecatchmentdischargewillchangewithlanduse.Inthispaper,thefocusistodiscussthemodeloflongtermdischargeofcatchmentwhichincludestwokindsoflanduse :oneisforestattheupperpartofthecatchment,anotherispaddyfield… 相似文献
8.
The common language of space: a way of looking at the social,economic and environmental functioning of cities on a common basis 总被引:4,自引:0,他引:4
Bill Hillier 《环境科学学报(英文版)》1999,11(3):344-349
1 SomequestionsandanswersaboutcomplexityThefirstsentenceinanydiscussionaboutthescienceofcitiesusuallycontainstheword“complexity”.Oneofthemostobviousformsthistakesisthesheerphysicalandspatialcomplexityofthecityasanobject.Thereis,however,inmosturbanres… 相似文献
9.
IntroductionTheprocessofmunicipalsolidwaste(MSW)isoneofthemostseriousissuesintermsofenvironmentalprotection.ProcessingofMSWwithoutfurtherdisastrouscontaminationcanbeachievedonlyinmodernizedmeasures,suchasincineratingandenergygeneratingconcurrently(Shen… 相似文献
10.
Effects of atmospheric mercury pollution on terrestrial ecosystem in Chongqing, China 总被引:1,自引:0,他引:1
1 IntroductionMercury(Hg)asaglobalpollutanthascausedconcernworldwidesincetheendof 1980s.Itisemittedtotheatmospherefrombothanthropogenicandnaturalsources.Importantsourceoftheformeristhedischargefrom productionanduseofHgaswellasthecombustionoffossilfuels(Nri… 相似文献
11.
IntroductionFertilizationisessentialforagriculturalproduction ,butunreasonablyapplyingfertilizerscouldresultinseriesofproblemssuchascropqualitydecline,fertilizeruseefficiencydecrease,residualfertilizerspollution groundwaterandriversandnitrogencontented … 相似文献
12.
Characteristics of air particulate matter and their sources inurban and rural area of Beijing, China
IntroductionThereisagrowingawarenesstotheimportanceofairpollutioninmajorcites.Anumberofstudieshaveshownthattheconcentrationsofcertaintraceelementsintheurbanatmospherehavebeenelevatedby pollution ,andtherefore ,thehighestconcentrationsofthesechemicalcont… 相似文献
13.
IntroductionHealthhazardsfrommercuryintheenvironmenthavecausedrestrictionsintheuseofmercuryandastrictercontrolofthereleaseofmercuryfromindustrialandotheruses.Butatthesametimethesesourcesofmercuryhavebeensubjectedtoregulation ,twonewsourceshaveappeared … 相似文献
14.
IntroductionInrecentyears,moreandmoreevidencesshowthatgreenhousegasesemissionshavebeguntoinfluenceglobalclimate.Greenhouseeffectisoneofthemostrigorouschallengesnowadaysweface.Sincebothcauseandimpactofclimatechangeareglobal,thewholeworldshouldtakeacti… 相似文献
15.
IntroductionBecauseofthelowefficiencyoftheelectrostaticprecipitator (ESP)forcollectingthesubmicronparticles ,theelectricalagglomerationmethodhasledtoanincreasinginterestinreducingtheemissionofthefineparticles .Manyauthorshavestudiedelectricalagglomerati… 相似文献
16.
Recent developments of surface complexation models applied to environmental aquatic chemistry 总被引:1,自引:0,他引:1
1 BackgroundIngeochemicalcirculation ,variouspollutantswithadverseimpacts (e .g .,toxicity ,mutagenicityandlethality)areusuallyassociatedwithheterogeneousparticles,predominantlyclayminerals .Generally ,thepropertiesofthesecomplexparticlesshouldbedescribedusin… 相似文献
17.
Naturalresources(landform ,geology ,hydrology,creature ,ecologyetc .) ,humanresources (culture ,economy,locationetc .)andlandscapeecologicalspatialstructureofacertainplacecandetermineitsdevelopmentpatternsandlandscapearchitectureaswellasitslimitationofdevelopm… 相似文献
18.
BAI Yu |bo SHI Guang |yu {* } Koichi Tamura Takashi Shibata Yasunobu Iwasaka Kaneta Shin′ichi Takamura Tamio 《环境科学学报(英文版)》2000,(4)
IntroductionAerosolshavethepotentialtochangetheglobalclimatebecauseoftheirdirectradiativeeffectsandtheirindirecteffectsascloudcondensationnuclei.Aerosolsarealsoimportantcomponentsinbiogeochemicalcyclesandinheterogeneouschemistry ,whichcanaffecttrace ga… 相似文献
19.
Comparison of the thermal properties of clay samples as potential walling material for naturally cooled building design 总被引:1,自引:0,他引:1
IntroductionHeatwhichistransmittedthroughwalls ,eitherduringthedayorretainedbythewallsandtransmittedatnightbytheprocessesofconductionandradiationisoneofthefactorscausingdiscomfortininteriorspacesinthetropicalregion .Theeffectofthisheatcouldbeminimizedo… 相似文献
20.
IntroductionForlasttwodecades,awaveoftheexperimentalconsciousnessisbeingdevelopedindevelopingcountriesincludingIndia.Moderntechnologyhavebeencreatedenvironmentalpollutant,ofwhichnoiseisconsideredastheworstenemyofhumanhealthandacurseofoursociety .Noisei… 相似文献