污染物的迁移转化机理-英文版大作业.ppt

污染物迁移与转化机理作业——苯乙烯
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Contents
Introduction of Styrene
Choice of Waterbody
Physical and Chemical Properties
Analysis of Mechanisms
Input & Mixing
Calculation of Removal Rate
Conclusion
Introduction of Styrene(苯乙烯)
Styrene is a kind pounds, which benzene is replaced with a hydrogen of ethylene, and the electronic of vinyl conjugates with benzene.
Introduction of Styrene(苯乙烯)
IUPAC name
Molecular formula
Systematic name
Nickname
CAS No.
100-42-5
Styrax(苏合香)
Styrene
C8H8
C6H5CHCH2
Ethenylbenzene
Character: insoluble in water, but soluble in ethanol, ethyl ether, exposed to the air can be polymerized and oxygenated gradually.
It is used as synthetic resin, ion exchange resin and synthetic rubber in industry.
Toxicity and hazardous effects
Acute toxicity
Subacute and Chronic toxicity
Acute effects are mainly about the stimulation to eyes, skin, and mucous membrane of respiratory tract, if the concentration is high, anesthesia can be caused.
Obviously stimulating signs: awareness of fuzzy, listlessness and ataxia, burnout, lack of power
Subacute influence can cause headaches, dizziness, multiple neuropathy, mild vision narrowed, nerve conduction speed is low.
Chronic effects on blood and liver may have mild damage.
Toxicity and hazardous effects
Metabolic effect
Environmental hazards
Metabolic effect:Styrene can get through the respiratory tract, skin and gastrointestinal absorption.
The content in the brain, liver, kidneys, spleen and adipose tissue of kidney is higher than in anizations.
Environmental hazards:Styrene will volatilizes quickly when it fall on the ground, and send out a peculiar smell. Dump in the water can float on the surface of the water, poison to anisms.
Major Sources of Styrene
Plants discharge styrene sewage, is the main source of styrene in the environment waterbody.
The polystyrene material which is used for food preservation, can release styrene under certain conditions. May also accumulate in food