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1、EnvironmentalpollutionandpreventionCrew：滕达、朱梦浩、沙科成、路飞EnvironmentalpollutionandpreventionSoilpollutionhazardsandthestatusquo3Theconceptofcharacteristicsofthesoilpollution1Soilpollutionreasons24OfsoilpollutionpreventionandcontrolmeasuresFirst,theconceptofthecharacteristicsofthes
2、oilpollutionWhatissoilpollution？Soilpollutionharmfultoxicsubstancesintothesoilbeyondtheself-purificationcapacityofthesoil,resultinginsoilphysical,chemicalandbiologicalpropertieschange,reducingcropyieldsandquality,thephenomenonofharmtohumanhealth.Fromtheperspectiveofenvironment
3、alsciencetodefinesoilpollutionisthewasteandtoxicandhazardoussubstancesintothesoiloverthesoilself-purificationcapacity,destructionofthestateofthenaturalbalanceofthesoilsystemcompletelysoilqualitydeteriorationorrecessionphenomenon.2majorpollutants1.Inorganiccontaminants(suchashe
4、avymetals,acids,salts,etc.)2.Organicpesticides(suchasfertilizers,pesticides,herbicides,etc.)3.Organicwaste(suchasbiodegradableordegradableorganicwaste,etc.)4.Sludge,slagandflyash,radioactivesubstances,parasites,pathogens1soilpollutionhashiddenandlag2Accumulationofsoilpollution
5、3soilpollutionirreversible4soilpollutionrefractoryrational3.CharacteristicsoflandcontaminationSecond.Soilpollutionreasons1sewageforirrigation2airpollution3excessiveapplicationoffertilizers4heavyuseofpesticides5solidwaste6ofheavymetals7radioactivematerialcontaminationofsoil1sew
6、ageforirrigationSewageandindustrialwastewater,containingnitrogen,phosphorus,potassiumandmanyplantsneednutrients,soreasonableuseofSewageIrrigation,generalstimulationeffect.Sewagecontainingheavymetals,phenols,cyanideandothertoxicandhazardoussubstancesdirectlyusedforfarmlandirrig
7、ation,willpollutethesoil.2airpollutionAtmosphericpollutioncanbedividedintotwocategories:gaspollution,suchassulfurdioxide,fluoride,ozone,nitrogenoxides,hydrocarbons,etc.;aerosolpollution,suchasdust,sootandothersolidparticlesandliquidsmoke,fogandotherparticles,theyarebysedimenta
8、tionorprecipitationintothesoilandcausepollution.3.Excessiveap
