海洋污染-英文演讲-PPT

marinepolutioninChinateammembersTheloseoflivingenvironment1.enclosingtideland,Marine、coastalprojectandwaterwaydredgingactivitiesarethecauses.thus,thenormalactivityofMarinelifeisSeriouslyinterfered,sometimesevenmakeMarinebiologicalhabitatcompletelyextincted.Andthedeclineinthenumberofmangroveisthebestexample.overfishingandilleagallytrade2.becausealotofMarineanimalhasveryhighornamentalvalueorcanbetreatedasartcollection,andwithnutritionalvalue,peoplearedrivenbyintereststofishandevenillegallycatch.What'smore,Marinefishingvesselsincreaseddramatically,fishingsegmenthasimprovedsteadily.thesecauseseriousdestructionoftheresourcesandevenmakethemdieout.alienspeciesinvasion3.withthedevelopmentofChina'soceantransportation,Thespreadofbreeding,andsoliciting,foreignMarinespecies'quantityincreasedsharplyresultingintheMarineecologicalsystemstructure'simbalance,functiondegradationlossofdiversity,whichmakesChineseoceanenvironmentfacesincreasingpressureofintrusion.Marineenvironmentpollution4.Oceanoilleak,Marinetransportation,variousland-sourcedpollutants(mainlycoastalindustrialwastewaterandlifesewage)dischargedintothesea,aggravatingtheMarineenvironmentpollution,andtheMarineecologicalenvironmenthasdeteriorated.Thefivewastewaterdischargedintotheocean•First,thelow-levelradioactivewastewaterTheso-calledlow-levelradioactivewastewaterisalitercontainedradioactivitylessthan10(-5)CuriewastewaterThesecond,containingtheeasilydegradableorganiccompoundsandheavymetalsinwastewaterEasilydegradableorganicmatter,microorganismsundernaturalconditionsisdifficultdescendingdecompositionoforganicmaterialoccursinthenaturalenvironmentcanbemaintainedindefinitelyanddisseminated,andthusaseriousimpactonthemarineenvironmentandecologicalThird,medicalsewagecarryingpathogens,domesticsewageandindustrialwastewaterPathogens,infectiousagents,includingpathogens,diseaseeggs,viruses.Pathogenscansurviveinthewatercanenterthebodythroughthefoodchain,whichmakeyousickfourth,Industrialwastewatercontainingorganicmatterandnutrients,sewage.Wastewatercontainingorganicandnutrientsubstancesthatcontainprotein,fat,aminoacids,carbohydratesandotherozone-depletingorganicmatterandnitrogen,phosphorusandothernutrientsinwastewaterFifth,theheatedwasteHeatedwastewateremissionsfromthermalpowerplants,nuclearpowerplants,petrochemical,nonferrousmetalsmeltingandotherindustrialprocessesinhigh-temperaturecoolingwater,ashwatertemperatureishigherthannormalseatemperatureswastewaterAlargenumberofnutrient-richhumansewage,industrialwastewater,agriculturalwastewateremissionseaof​​redtideorganismswillusenutrientssuchasnitrogen,phosphorus,carbonfranticallybreedingandaccumulationinducedredtideoccurred.Measure：SewagemarinedisposalOceandisposalofsewageisprohibitedoreffectivemeasurestolimitemissionsandfreedomofsewageshorerandomrow,concentratedpretreatmentofsewageworkssystem,transportationbypipelinetotheunderwaterdepthoftheocean,emissionsbythediffuser,sothatinassmallaspossiblewithinahighdegreeofdilution,toreducetheimpactontheenvironment.Thissewagemarinedisposalengineering,comparedwiththeconventionalsecondarytreatmentofsewage,saving1/2to1/3ofinvestmentininfrastructureandoperationandmanagementcosts,covering30to40percentreductioninbenefitsareenormous.conclusionOvertheyears,theChinesepeople'sawarenessofresourceprotectionisweakandthelegalconceptisthin.Weoftendestructatfirstandprotectwhensituationisterrible,somanylandaquaticorganismsandmarinelifehavedisappearedfromoursight.AsaresultofKindsofreasons,theChinesemarinebiodiversityandthemarineenvironmentisstillisworrying.