海洋污染英文演讲稿.pptx

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1、 The lose of living environment 1.enclosing tideland,Marine、coastal project and waterway dredging activities are the causes.thus,the normal activity of Marine life is Seriously interfered,sometimes even make Marine biological habitat completely extincted.And the decline in the number of mangrove is

2、the best example.第1页/共14页 overfishing and illeagally trade2.because a lot of Marine animal has very high ornamental value or can be treated as art collection,and with nutritional value,people are driven by intereststo fish and even illegally catch.Whats more,Marine fishing vessels increased dramatic

3、ally,fishing segment has improved steadily.these cause serious destruction of the resources and even make them die out.第2页/共14页 alien species invasion 3.with the development of Chinas ocean transportation,The spread of breeding,and soliciting,foreign Marine species quantity increased sharply resulti

4、ng in the Marine ecological system structures imbalance,function degradation loss of diversity,whichmakes Chinese ocean environment faces increasing pressure of intrusion.第3页/共14页 Marine environment pollution4.Ocean oil leak,Marine transportation,various land-sourced pollutants(mainly coastal indust

5、rial wastewater and life sewage)discharged into the sea,aggravating the Marine environment pollution,and the Marine ecological environment has deteriorated.第4页/共14页第5页/共14页第6页/共14页第7页/共14页The five wastewater discharged into the oceanFirst,the low-level radioactive waste waterThe so-called low-level

6、radioactive waste water is a liter contained radioactivity less than 10(-5)Curie wastewaterThe second,containing the easily degradable organic compounds and heavy metals in wastewater Easily degradable organic matter,microorganisms under natural conditions is difficult descending decomposition of or

7、ganic material occurs in the natural environment can be maintained indefinitely and disseminated,and thus a serious impact on the marine environment and ecological第8页/共14页Third,medical sewage carrying pathogens,domestic sewage and industrial wastewaterPathogens,infectious agents,including pathogens,

8、disease eggs,viruses.Pathogens can survive in the water can enter the body through the food chain,which make you sickfourth,Industrial wastewater containing organic matter and nutrients,sewage.Wastewater containing organic and nutrient substances that contain protein,fat,amino acids,carbohydrates an

9、d other ozone-depleting organic matter and nitrogen,phosphorus and other nutrients in wastewater第9页/共14页Fifth,the heated waste Heated waste water emissions from thermal power plants,nuclear power plants,petrochemical,nonferrous metal smelting and other industrial processes in high-temperature coolin

10、g water,ash water temperature is higher than normal sea temperatures waste waterA large number of nutrient-rich human sewage,industrial wastewater,agricultural wastewater emission sea of red tide organisms will use nutrients such as nitrogen,phosphorus,carbon frantically breeding and accumulation in

11、duced red tide occurred.第10页/共14页 Measure：Sewage marine disposal Ocean disposal of sewage is prohibited or effective measures to limit emissions and freedom of sewage shore random row,concentrated pretreatment of sewage works system,transportation by pipeline to the underwater depth of the ocean,emi

12、ssions by the diffuser,so that inas small as possible within a high degree of dilution,to reduce the impact on the environment.This sewage marine disposal engineering,compared with the conventional secondary treatment of sewage,saving 1/2 to 1/3 of investment in infrastructure and operation and mana

13、gement costs,covering 30 to 40 percent reduction in benefits are enormous.第11页/共14页 conclusionOver the years,the Chinese peoples awareness of resource protection is weak and the legal concept is thin.We often destruct at first and protect when situation is terrible,so many land aquatic organisms and marine life have disappeared from our sight.As a result of Kinds of reasons,the Chinese marine biodiversity and the marine environment isstill is worrying.第12页/共14页第13页/共14页感谢您的观看。感谢您的观看。第14页/共14页