海洋污染 英文演讲稿.ppt

,marinepolutioninChina,teammembers,主讲人：,Theloseoflivingenvironment,1.,enclosingtideland,Marine、coastalprojectandwaterwaydredgingactivitiesarethecauses.thus,thenormalactivityofMarinelifeisSeriouslyinterfered,sometimesevenmakeMarinebiologicalhabitatcompletelyextincted.Andthedeclineinthenumberofmangroveisthebestexample.,overfishingandilleagallytrade,2.,becausealotofMarineanimalhasveryhighornamentalvalueorcanbetreatedasartcollection,andwithnutritionalvalue,peoplearedrivenbyintereststofishandevenillegallycatch.Whatsmore,Marinefishingvesselsincreaseddramatically,fishingsegmenthasimprovedsteadily.thesecauseseriousdestructionoftheresourcesandevenmakethemdieout.,alienspeciesinvasion,3.,withthedevelopmentofChinasoceantransportation,Thespreadofbreeding,andsoliciting,foreignMarinespeciesquantityincreasedsharplyresultingintheMarineecologicalsystemstructuresimbalance,functiondegradationlossofdiversity,whichmakesChineseoceanenvironmentfacesincreasingpressureofintrusion.,Marineenvironmentpollution,4.,Oceanoilleak,Marinetransportation,variousland-sourcedpollutants(mainlycoastalindustrialwastewaterandlifesewage)dischargedintothesea,aggravatingtheMarineenvironmentpollution,andtheMarineecologicalenvironmenthasdeteriorated.,Thefivewastewaterdischargedintotheocean,First,thelow-levelradioactivewastewater,Theso-calledlow-levelradioactivewastewaterisalitercontainedradioactivitylessthan10(-5)Curiewastewater,Thesecond,containingtheeasilydegradableorganiccompoundsandheavymetalsinwastewater,Easilydegradableorganicmatter,microorganismsundernaturalconditionsisdifficultdescendingdecompositionoforganicmaterialoccursinthenaturalenvironmentcanbemaintainedindefinitelyanddisseminated,andthusaseriousimpactonthemarineenvironmentandecological,Third,medicalsewagecarryingpathogens,domesticsewageandindustrialwastewater,Pathogens,infectiousagents,includingpathogens,diseaseeggs,viruses.Pathogenscansurviveinthewatercanenterthebodythroughthefoodchain,whichmakeyousick,fourth,Industrialwastewatercontainingorganicmatterandnutrients,sewage.,Wastewatercontainingorganicandnutrientsubstancesthatcontainprotein,fat,aminoacids,carbohydratesandotherozone-depletingorganicmatterandnitrogen,phosphorusandothernutrientsinwastewater,Fifth,theheatedwaste,Heatedwastewateremissionsfromthermalpowerplants,nuclearpowerplants,petrochemical,nonferrousmetalsmeltingandotherindustrialprocessesinhigh-temperaturecoolingwater,ashwatertemperatureishigherthannormalseatemperatureswastewater,Alargenumberofnutrient-richhumansewage,industrialwastewater,agriculturalwastewateremissionseaofredtideorganismswillusenutrientssuchasnitrogen,phosphorus,carbonfranticallybreedingandaccumulationinducedredtideoccurred.,Measure：Sewagemarinedisposal,Oceandisposalofsewageisprohibitedoreffectivemeasurestolimitemissionsandfreedomofsewageshorerandomrow,concentratedpretreatmentofsewageworkssystem,transportationbypipelinetotheunderwaterdepthoftheocean,emissionsbythediffuser,sothatinassmallaspossiblewithinahighdegreeofdilution,toreducetheimpactontheenvironment.Thissewagemarinedisposalengineering,comparedwiththeconventionalsecondarytreatmentofsewage,saving1/2to1/3ofinvestmentininfrastructureandoperationandmanagementcosts,covering30to40percentreductioninbenefitsareenormous.,conclusion,Overtheyears,theChinesepeoplesawarenessofresourceprotectionisweakandthelegalconceptisthin.Weoftendestructatfirstandprotectwhensituationisterri