Mercury

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4) Oxidation of aromatic compounds • The ring-opening process of phenol ( 苯酚 ) and salicylic acid ( 水杨酸 ) and other compounds includes the primary production of pyrocatechol ( 邻苯二羟基 ), the secondary split of two hydroxyls ( 羟基 ), and then the production of dicarboxylic acid ( 二羧酸 ) and the final disappearing.
The effect of the structure of surface active agent on bio-degradation 1) Cationic surfactant The bio-degradation of cationic surfactant requires aerobic conditions. The order of the ability of being biodegraded of three types of alkylbenzene sulfonates (ABS) with different structures of hydrophobic groups is as follows: Linear ABS (LAS)>ABS substituted by a branch-chain at the end of the group>trimethy ABS As for those cationic surfactants difficult being degraded, we can prepare them together with other types of surface active agents in order to raise its bio-degradation. e.g. trimethyl dodecyl ammonium chloride ( 三甲基十二烷基氯化铵 ) couldnot be degraded even in 27h while it can be easily degraded once being mixed with LAS at the radio of 1:1.
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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
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Mercury in the air • come from vo
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4) Hg 2+ can easily form complex co
Page 13 and 14: 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 66 and 67: 2) Anionic surfactant • Anionic s
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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