环境污染物与食品安全说课讲解.ppt

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1、环境境污染物与食品安全染物与食品安全2FeaturesofpollutantnGreatvarietynLowconcentrationnGreatharmnLastlong3PollutantandfoodsafetyoAvitalfactorwhichimpactonfoodsafetyoGaspollutantnHarmfulgasSO2、CO、hydrocarbonsnParticulatematterdust、acidmist、hazeoWaterpollutantnInorganictoxicheavymetal、cyanidenOrganictoxicphenol、pestici

2、desnPathogenvirus、parasiteoSoilpollutant4GasPollutantandfoodsafetynSourceFuelconsumption,industrialproductionandtransportation5AcidrainoDefinition：acidprecipitation,pH5.65。oSource：SO2和NOXSulfuricacid,nitricacidoHarmnDangertoplantsandanimalsnPoorharvestnBadqualityofwater6DioxinsoSourceBurningoforgani

3、cchemicalsandgarbagewhichcontainingCloHarmnHighlytoxic、carcinogenicnDifficulttodegrade,halflifeinbodyis7years.73,4benzopyreneoSourceBurningofCoal,gasoline,cigaretteoHarmCarcinogenic,mutagenic8WaterPollutantandfoodsafetyoDefinition Pollutants go into rivers,lakes,oceans,change thebiologicalproperties

4、orcommunities,therebyreducingthewaterusevalue.oSourceIndustrialwaste：77%Domesticwaste：23%9PhenolicpollutantsoSourceManufacturingofgas,coke,plastics,chemicalfiberoProperty MaketheproteincoagulationToxiceffecttoalllivingthings10Phenolicpollutants11oHarmHarmtoFish,microorganisms,cropso0.10.2mg/L,fishca

5、nnotbeeato6.59.3mg/L,damagefishgillsandpharynx,leadtoabdominalbleedingoHigherthan100mg/L,causingcropswitheredoVomiting,diarrhea,lossofappetite,dizziness12CyanidepollutantsoSourceIndustrialsewage,electroplating,coking,gas,metallurgy,petrochemicaloHarmnHighlytoxicnInhibitionofenzymeactivitynInhibitthe

6、biologicalrespirationnCentralnervoussystemsuppression13SoilPollutantandfoodsafetyoDefinitionHarmfulsubstancesproducedbyhumanactivitiesintothesoil,whenitscontentexceedsthesoilitselfself-purificationcapacity,soilcompositionandthenaturechange,reducingthequalityofcropyields,andendangerhumanhealth.14oSou

7、rceIndustrialwaste,chemicalpesticides,biologicalpathogens15Main PollutantsoPhenolicpollutantsandCyanidepollutantsoHeavyMetal mercury,arsenic,cadmium,chromiumoSludge,waste16HeavyMetalPollutantsoPropertynFixedtothesoilintheformofHydroxides,sulfates,sulfides,carbonatesorphosphatesnDifficulttomigrate,co

8、ntinuetoaccumulate,showharmwhentosomeextentnHighSoilresidualrate,90%nDonotdisappear,longhalf-life17oMercurynSource：Industrialwaste,pesticides,wastebatteriesnToxicityAlkylmercurydivalentmercuryelementalmercury18oHarmnLowdosagethroughfeces,urine,sweat,noharmnHighdosageAcutepoisoningnLongtimeintakeMina

9、matadiseaseHarmtonervoussystemandorgans19oLimitsoAquaticproducts0.3mg/kg；Meat、egg、oil0.05mg/kgGrain0.02mg/kgVegetableandfruit0.01mg/kg20oPbnSourceoPbcompoundsusedinindustrialandagriculturaloPesticides,paints,pigmentsoFoodcontainers,pipes,equipment21nHarmoAcutepoisoningNausea,vomiting,constipation,he

10、adache,dizziness,paleskinoSubacutepoisoningNausea,vomiting,constipationordiarrhea,abdominalcramps;enlargementoftheliveroChronicpoisoning Peripheralneuritis,anemia,Liverandkidneydamage22oLimitsBeans0.1mg/kgMeat0.5mg/kgGrain0.4mg/kgVegetableandfruit0.2mg/kg23oCadmiumoSourceCadmiumpollutantsFoodcontaineroHarm AccumulateinkidneyandotherorgansPrecipitationofcalcium,osteoporosisItai-itaidisease Teratogenic,mutagenic24oLimitsBeans0.1mg/kgMeatandfish0.1mg/kgGrain0.2mg/kgVegetableandegg0.05mg/kg25Callfortheniceenvironment!26此课件下载可自行编辑修改，仅供参考！此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢感谢您的支持，我们努力做得更好！谢谢