文档介绍：Environmental pollutant
Food safety
And
Yuan Lei
11513026
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What is environmental pollutant
Adverse effects of the decline in the quality of human beings and other living beings caused by human activities
Biological factor
Chemistry factor
Physical factor
Gas
Water
Soil
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Features of pollutant
Great variety
Low concentration
Great harm
Last long
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Pollutant and food safety
A vital factor which impact on food safety
Gas pollutant
Harmful gas —SO2、CO、 hydrocarbons …
Particulate matter—dust、 acid mist 、 haze …
Water pollutant
Inorganic toxic—heavy metal、 cyanide …
Organic toxic—phenol、 pesticides …
Pathogen—virus、 parasite…
Soil pollutant
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Gas Pollutant and food safety
Source
Fuel consumption, industrial production and transportation
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Acid rain
Definition： acid precipitation , pH＜。
Source：SO2和 NOX Sulfuric acid, nitric acid
Harm
Danger to plants and animals
Poor harvest
Bad quality of water
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Dioxins
Source
Burning of organic chemicals and garbage which containing Cl
Harm
Highly toxic 、 carcinogenic
Difficult to degrade, half life in body is 7 years.
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3,4 benzopyrene
Source
Burning of Coal, gasoline, cigarette
Harm
Carcinogenic, mutagenic
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Water Pollutant and food safety
Definition
Pollutants go into rivers, lakes, oceans, change the biological properties or communities, thereby reducing the water use value.
Source
Industrial waste ：77%
Domestic waste ：23%
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