环境污染物与食品安全ppt课件.ppt

Environmentalpollutant Foodsafety And YuanLei11513026 1 Whatisenvironmentalpollutant Adverseeffectsofthedeclineinthequalityofhumanbeingsandotherlivingbeingscausedbyhumanactivities Biologicalfactor Chemistryfactor Physicalfactor GasWaterSoil 2 3 Featuresofpollutant GreatvarietyLowconcentrationGreatharmLastlong 4 Pollutantandfoodsafety AvitalfactorwhichimpactonfoodsafetyGaspollutantHarmfulgas SO2 CO hydrocarbons Particulatematter dust acidmist haze WaterpollutantInorganictoxic heavymetal cyanide Organictoxic phenol pesticides Pathogen virus parasite Soilpollutant 5 GasPollutantandfoodsafety SourceFuelconsumption industrialproductionandtransportation 6 Acidrain Definition acidprecipitation pH 5 65 Source SO2和NOXSulfuricacid nitricacidHarmDangertoplantsandanimalsPoorharvestBadqualityofwater 7 Dioxins SourceBurningoforganicchemicalsandgarbagewhichcontainingClHarmHighlytoxic carcinogenicDifficulttodegrade halflifeinbodyis7years 8 3 4benzopyrene SourceBurningofCoal gasoline cigaretteHarmCarcinogenic mutagenic 9 WaterPollutantandfoodsafety DefinitionPollutantsgointorivers lakes oceans changethebiologicalpropertiesorcommunities therebyreducingthewaterusevalue SourceIndustrialwaste 77 Domesticwaste 23 10 Phenolicpollutants SourceManufacturingofgas coke plastics chemicalfiberPropertyMaketheproteincoagulationToxiceffecttoalllivingthings 11 Phenolicpollutants 12 HarmHarmtoFish microorganisms crops0 1 0 2mg L fishcannotbeeat6 5 9 3mg L damagefishgillsandpharynx leadtoabdominalbleedingHigherthan100mg L causingcropswitheredVomiting diarrhea lossofappetite dizziness 13 Cyanidepollutants SourceIndustrialsewage electroplating coking gas metallurgy petrochemicalHarmHighlytoxicInhibitionofenzymeactivityInhibitthebiologicalrespirationCentralnervoussystemsuppression 14 SoilPollutantandfoodsafety DefinitionHarmfulsubstancesproducedbyhumanactivitiesintothesoil whenitscontentexceedsthesoilitselfself purificationcapacity soilcompositionandthenaturechange reducingthequalityofcropyields andendangerhumanhealth 15 SourceIndustrialwaste chemicalpesticides biologicalpathogens 16 MainPollutantsPhenolicpollutantsandCyanidepollutantsHeavyMetalmercury arsenic cadmium chromiumSludge waste 17 HeavyMetalPollutants PropertyFixedtothesoilintheformofHydroxides sulfates sulfides carbonatesorphosphatesDifficulttomigrate continuetoaccumulate showharmwhentosomeextentHighSoilresidualrate 90 Donotdisappear longhalf life 18 MercurySource Industrialwaste pesticides wastebatteriesToxicityAlkylmercury divalentmercury elementalmercury 19 HarmLowdosage throughfeces urine sweat noharmHighdosage AcutepoisoningLongtimeintake MinamatadiseaseHarmtonervoussystemandorgans 20 LimitsAquaticproducts 0 3mg kg Meat egg oil 0 05mg kgGrain 0 02mg kgVegetableandfruit 0 01mg kg 21 PbSourcePbcompoundsusedinindustrialandagriculturalPesticides paints pigmentsFoodcontainers pipes equipment 22 HarmAcutepoisoningNausea vomiting constipation headache dizziness paleskinSubacutepoisoningNausea vomiting constipationordiarrhea abdominalcramps enlargementoftheliverChronicpoisoningPeripheralneuritis anemia Liverandkidneydamage 23 LimitsBeans 0 1mg kgMeat 0 5mg kgGrain 0 4mg kgVegetableandfruit 0 2mg kg 24 CadmiumSourceCadmiumpollutantsFoodcontainerHarmAccumulateinkidneyandotherorgansPrecipitationof