Mercury

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2) Anionic surfactant • Anionic surfactants such as LAS and AES ( 脂肪醇醚硫酸盐 ) constitute a large portion of surface active agents contained in detergents. • LAS degrades the most quickly in all the detergents, which can be hydrolysed by sulfatase to sulfates and some related fatty alchohol ( 脂肪醇 ) and finally further oxidized to CO2 和 H2O. • As for LAS, the degradation speed grows with the farther distance between the sulfo ( 磺基 ) and the end of the methyl chian and it degrades the most quickly with the number of carbon atoms of the methyl between 6~12. The effect of branch-chain is similar to that of nonionic surfactants.
3) nonionic surfactants • Easiness for degradation: linear molecule>normal branch-chain molecule molecule with alkyl>molecule with phenyl Linear carbinol and disubstituted carbinol oxyethyl compounds can be effectively degraded by microorganizm in the activated sludge.
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Environmental Chemistry Part 5 Typi
Page 3 and 4:
• Typical organic pollutants PAHs
Page 5 and 6:
Mercury (Hg) 1. Source and Distribu
Page 7 and 8:
2. Transport and Transformation of
Page 9 and 10:
Mercury in the air • come from vo
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4) Hg 2+ can easily form complex co
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Mercury in the soil • Over 95% of
Page 15 and 16: The methylation process of mercury
Page 17 and 18: Dimethyl mercury Under anaerobic co
Page 19 and 20: Transport and Transformation of Mer
Page 22 and 23: . Hazards of Mercury Pollution •
Page 24 and 25: . Prevention of Mercury pollution
Page 26 and 27: Environmental Chemistry Part 5 Typi
Page 28 and 29: asic characteristics of PCBs 1) Hig
Page 30 and 31: Transport and transfomation of PCBs
Page 32 and 33: The atmosphere is purified of PCBs
Page 34 and 35: The transport of PCBs in water •
Page 36 and 37: The transformation ways of PCBs in
Page 38 and 39: Degradation of PCBs • Substrate s
Page 40 and 41: 1) Sealing and storage • To seal
Page 42 and 43: Fusion medium method( 熔融介
Page 44 and 45: 4) Biodegradation • A potential m
Page 46 and 47: surface active agent • Definition
Page 48 and 49: Classification and properties of su
Page 50 and 51: 2. Cationic surfactant • The hydr
Page 52 and 53: 4. Nonionic surfactant • Nonionic
Page 54 and 55: 2) the relative position of hydroph
Page 56 and 57: 4) hydrophobic groups • The order
Page 58 and 59: 2. hazards 1) Surface active agent
Page 60 and 61: 4) The sterilization of high-concen
Page 62 and 63: 1. Bio-degradation of surface activ
Page 64 and 65: 4) Oxidation of aromatic compounds
Page 68 and 69: The relationship between molecular
Page 70 and 71: 3 steps for the photocatalysic degr
Page 72: One of the key points in the resear
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Mercury

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