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1、EnvironmentalpollutionandpreventionCrew：滕达、朱梦浩、沙科成、路飞EnvironmentalpollutionandpreventionSoilpollutionhazardsandthestatusquo3Theconceptofcharacteristicsofthesoilpollution1Soilpollutionreasons24OfsoilpollutionpreventionandcontrolmeasuresFirst,theconceptofthecharacteristicsofthesoilpol
2、lutionWhatissoilpollution？Soilpollutionharmfultoxicsubstancesintothesoilbeyondtheself-purificationcapacityofthesoil,resultinginsoilphysical,chemicalandbiologicalpropertieschange,reducingcropyieldsandquality,thephenomenonofharmtohumanhealth.Fromtheperspectiveofenvironmentalsciencetod
3、efinesoilpollutionisthewasteandtoxicandhazardoussubstancesintothesoiloverthesoilself-purificationcapacity,destructionofthestateofthenaturalbalanceofthesoilsystemcompletelysoilqualitydeteriorationorrecessionphenomenon.2majorpollutants1.Inorganiccontaminants(suchasheavymetals,acids,sa
4、lts,etc.)2.Organicpesticides(suchasfertilizers,pesticides,herbicides,etc.)3.Organicwaste(suchasbiodegradableordegradableorganicwaste,etc.)4.Sludge,slagandflyash,radioactivesubstances,parasites,pathogens1soilpollutionhashiddenandlag2Accumulationofsoilpollution3soilpollutionirreversib
5、le4soilpollutionrefractoryrational3.CharacteristicsoflandcontaminationSecond.Soilpollutionreasons1sewageforirrigation2airpollution3excessiveapplicationoffertilizers4heavyuseofpesticides5solidwaste6ofheavymetals7radioactivematerialcontaminationofsoil1sewageforirrigationSewageandindus
6、trialwastewater,containingnitrogen,phosphorus,potassiumandmanyplantsneednutrients,soreasonableuseofSewageIrrigation,generalstimulationeffect.Sewagecontainingheavymetals,phenols,cyanideandothertoxicandhazardoussubstancesdirectlyusedforfarmlandirrigation,willpollutethesoil.2airpolluti
7、onAtmosphericpollutioncanbedividedintotwocategories:gaspollution,suchassulfurdioxide,fluoride,ozone,nitrogenoxides,hydrocarbons,etc.;aerosolpollution,suchasdust,sootandothersolidparticlesandliquidsmoke,fogandotherparticles,theyarebysedimentationorprecipitationintothesoilandcausepoll
8、ution.3.Excessiveap
