土壤污染及防治(英语).ppt

EnvironmentalpollutionandpreventionCrew：滕达、朱梦浩、沙科成、路飞

EnvironmentalpollutionandpreventionSoilpollutionhazardsandthestatusquo3Theconceptofcharacteristicsofthesoilpollution1Soilpollutionreasons24Ofsoilpollutionpreventionandcontrolmeasures

First,theconceptofthecharacteristicsofthesoilpollutionWhatissoilpollution？Soilpollutionharmfultoxicsubstancesintothesoilbeyondtheself-purificationcapacityofthesoil,resultinginsoilphysical,chemicalandbiologicalpropertieschange,reducingcropyieldsandquality,thephenomenonofharmtohumanhealth.Fromtheperspectiveofenvironmentalsciencetodefinesoilpollutionisthewasteandtoxicandhazardoussubstancesintothesoiloverthesoilself-purificationcapacity,destructionofthestateofthenaturalbalanceofthesoilsystemcompletelysoilqualitydeteriorationorrecessionphenomenon.

2majorpollutantsInorganiccontaminants(suchasheavymetals,acids,salts,etc.)01Organicpesticides(suchasfertilizers,pesticides,herbicides,etc.)02Organicwaste(suchasbiodegradableordegradableorganicwaste,etc.)03Sludge,slagandflyash,radioactivesubstances,parasites,pathogens04

soilpollutionhashiddenandlagAccumulationofsoilpollutionsoilpollutionirreversiblesoilpollutionrefractoryrationalCharacteristicsoflandcontamination

Second.Soilpollutionreasonssewageforirrigation添加标题airpollution添加标题excessiveapplicationoffertilizers添加标题heavyuseofpesticides添加标题solidwaste添加标题ofheavymetals添加标题radioactivematerialcontaminationofsoil添加标题

1sewageforirrigationSewageandindustrialwastewater,containingnitrogen,phosphorus,potassiumandmanyplantsneednutrients,soreasonableuseofSewageIrrigation,generalstimulationeffect.Sewagecontainingheavymetals,phenols,cyanideandothertoxicandhazardoussubstancesdirectlyusedforfarmlandirrigation,willpollutethesoil.

2airpollutionAtmosphericpollutioncanbe