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1、EnvironmentalpollutionandpreventionCrew：滕达、朱梦浩、沙科成、路飞EnvironmentalpollutionandpreventionSoilpollutionhazardsandthestatusquo3Theconceptofcharacteristicsofthesoilpollution1Soilpollutionreasons24OfsoilpollutionpreventionandcontrolmeasuresFirst,theconceptofthecharacteristicsofthesoilpollutionWhatiss
2、oilpollution？Soilpollutionharmfultoxicsubstancesintothesoilbeyondtheself-purificationcapacityofthesoil,resultinginsoilphysical,chemicalandbiologicalpropertieschange,reducingcropyieldsandquality,thephenomenonofharmtohumanhealth.Fromtheperspectiveofenvironmentalsciencetodefinesoilpollutionisthewas
3、teandtoxicandhazardoussubstancesintothesoiloverthesoilself-purificationcapacity,destructionofthestateofthenaturalbalanceofthesoilsystemcompletelysoilqualitydeteriorationorrecessionphenomenon.2majorpollutants1.Inorganiccontaminants(suchasheavymetals,acids,salts,etc.)2.Organicpesticides(suchasfert
4、ilizers,pesticides,herbicides,etc.)3.Organicwaste(suchasbiodegradableordegradableorganicwaste,etc.)4.Sludge,slagandflyash,radioactivesubstances,parasites,pathogens1soilpollutionhashiddenandlag2Accumulationofsoilpollution3soilpollutionirreversible4soilpollutionrefractoryrational3.Characteristicso
5、flandcontaminationSecond.Soilpollutionreasons1sewageforirrigation2airpollution3excessiveapplicationoffertilizers4heavyuseofpesticides5solidwaste6ofheavymetals7radioactivematerialcontaminationofsoil1sewageforirrigationSewageandindustrialwastewater,containingnitrogen,phosphorus,potassiumandmanypla
6、ntsneednutrients,soreasonableuseofSewageIrrigation,generalstimulationeffect.Sewagecontainingheavymetals,phenols,cyanideandothertoxicandhazardoussubstancesdirectlyusedforfarmlandirrigation,willpollutethesoil.2airpollutionAtmosphericpollutioncanbedividedintotwocategories:gaspollution,suchassulfurd
7、ioxide,fluoride,ozone,nitrogenoxides,hydrocarbons,etc.;aerosolpollution,suchasdust,sootandothersolidparticlesandliquidsmoke,fogandotherparticles,theyarebysedimentationorprecipitationintothesoilandcausepollution.3.Excessiveap
