海洋污染英文演講稿.ppt
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marinepolutioninChina teammembers Theloseoflivingenvironment 1 enclosingtideland Marine coastalprojectandwaterwaydredgingactivitiesarethecauses thus thenormalactivityofMarinelifeisSeriouslyinterfered sometimesevenmakeMarinebiologicalhabitatcompletelyextincted Andthedeclineinthenumberofmangroveisthebestexample overfishingandilleagallytrade 2 becausealotofMarineanimalhasveryhighornamentalvalueorcanbetreatedasartcollection andwithnutritionalvalue peoplearedrivenbyintereststofishandevenillegallycatch What smore Marinefishingvesselsincreaseddramatically fishingsegmenthasimprovedsteadily thesecauseseriousdestructionoftheresourcesandevenmakethemdieout alienspeciesinvasion 3 withthedevelopmentofChina soceantransportation Thespreadofbreeding andsoliciting foreignMarinespecies quantityincreasedsharplyresultingintheMarineecologicalsystemstructure simbalance 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 agriculturalwastewateremissionseaof redtideorganismswillusenutrientssuchasnitrogen phosphorus carbonfranticallybreedingandaccumulationinducedredtideoccurred Measure Sewagemarinedisposal Oceandisposalofsewageisprohibitedoreffectivemeasurestolimitemissionsandfreedomofsewageshorerandomrow concentratedpretreatmentofsewageworkssystem transportationbypipelinetotheunderwaterdepthoftheocean emissionsbythediffuser sothatinassmallaspossiblewithinahighdegreeofdilution toreducetheimpactontheenvironment Thissewagemarinedisposalengineering comparedwiththeconventionalsecondarytreatmentofsewage saving1 2to1 3ofinvestmentininfrastructureandoperationandmanagementcosts covering30to40percentreductioninbenefitsareenormous conclusion Overtheyears theChinesepeople sawarenessofresourceprotectionisweakandthelegalconceptisthin Weoftendestructatfirstandprotectwhensituationisterrible somanylandaquaticorganismsandmarinelifehavedisappearedfromoursight AsaresultofKindsofreasons theChinesemarinebiodiversityandthemarineenvironmentisstillisworrying THANKYOU下載提示(請(qǐng)認(rèn)真閱讀)
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