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环境化学  2015 

氯代苯类化合物在飞灰表面的热分解

Keywords: 飞灰,氯苯,热分解

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Abstract:

密闭体系中,在生活垃圾焚烧飞灰的催化作用下,一氯苯到六氯苯表现出不同的热分解特性.这12种氯苯化合物分别经过300℃、30min加热处理,得到的脱氯/加氢反应产物的总量为初始氯苯化合物的50%—90%;而这些反应底物自身的含量为其原始含量的20%—90%.高氯代苯比低氯代苯更容易发生脱氯/加氢的反应.通过与热力学数据的比较,我们认为氯苯化合物脱氯/加氢反应是由热力学控制的.对于HCB而言,有两条主要的脱氯途径,其比例不相上下1)HCB→五氯苯→1,2,3,5-四氯苯→1,3,5-三氯苯→1,3-二氯苯→1-氯苯;2)HCB→五氯苯→1,2,4,5-四氯苯→1,2,4-三氯苯→1,4-二氯苯→1-氯苯.

References

[1]  胡小英,田书磊,王琪等,飞灰热处理过程中基本特性研究 [J].环境工程学报,2007, 1(12):120—123
[2]  钱永,郑明辉,刘文彬等,钙化合物对前生体生成二噁英类的阻滞作用 [J].环境化学,2005, 24(6):633—638
[3]  Ryu J Y, Mulholland J A, Metal-Mediated Chlorinated Dibenzo-p-dioxin (CDD) and Dibenzofuran (CDF) Formation from Phenols [J]. Chemosphere,2005, 58(7):977—988
[4]  张智平,倪余文,杨志军等,垃圾焚烧过程二噁英生成的研究进展 [J].化工进展,2004, 23(11):1161—1168
[5]  Su Y S, Hung H, Blanchard P et al., Spatial and Seasonal Variations of Hexachlorocyclohexanes (HCHs) and Hexachlorobenzene (HCB) in the Arctic Atmosphere [J]. Environ.Sci.Technol.,2006, 40(21):6601—6607
[6]  Ghorishi S B, Altwicker E R, Rapid Formation of Polychlorinated Dioxins/Furans during the Heterogeneous Combustion of 1,2-dichlorobenzene and 2,4-dichlorophenol [J]. Chemosphere,1996, 32(1):133—144
[7]  [JP2]Nakka H, Fullana A, Sidhu S, Surface Catalyzed Chlorobenzene Transformation Reactions in Post-Combustion Zone [J]. Organohalogen Compounds, 2004, 66:1140—1145
[8]  Collina E, Lasagni M, Pitea D et al., Degradation of Octachlorodibenzofuran and Octachlorodibenzo-p-dioxin Spiked on Fly-Ash:Kinetics and Mechanism [J]. Environ Sci Technol,1995, 29(3):577—585
[9]  Addink R, Olie K, Mechanisms of Formation and Destruction of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans in Heterogeneous Systems [J].Environ.Sci.Technol.,1995, 29(6):1425—1435
[10]  Dolfing J, Harrison B K, Gibbs Free Energy of Formation of Halogenated Aromatic Compounds and Their Potential Role as Electron Acceptors in Anaerobic Environments [J]. Environ.Sci.Technol.,1992, 26(11):2213—2218
[11]  杨志军,倪余文,张青等,不同垃圾焚烧炉产生的PCDD/Fs和PCBs同类物的分布 [J].环境化学,2005, 24(1):63—67
[12]  Song G J, Kim S H, Seo Y C et al., Dechlorination and Destruction of PCDDs/PCDFs in Fly Ashes from Municipal Solid Waste Incinerators by Low Temperature Thermal Treatment [J]. Chemosphere,2008, 71(2):248—257
[13]  Weber R, Nagai K, Nishino J et al., Effects of Selected Metal Oxides on the Dechlorination and Destruction of PCDD and PCDF [J]. Chemosphere,2002, 46(9—10):1247—1253
[14]  Ma X D, Zheng M H, Liu W B et al., Synergic Effect of Calcium Oxide and Iron(Ⅲ) Oxide on the Dechlorination of Hexachlorobenzene [J]. Chemosphere,2005, 60(6):796—801
[15]  Ma X D, Sun H W, Liu W B et al., Dechlorination of Hexachlorobenzene over Mg-Fe Composite Oxides [J]. Fresenius Environ.Bull.,2007, 16(7):745—748
[16]  Gao X B, Wang W, Liu X, Low-Temperature Dechlorination of Hexachlorobenzene on Solid Supports and the Pathway Hypothesis [J]. Chemosphere,2008, 71(6):1093—1099
[17]  Oberg T, Ohrstrom T, Bergstrom J, Metal Catalyzed Formation of Chlorinated Aromatic Compounds: A Study of the Correlation Pattern in Incinerator Fly Ash [J]. Chemosphere,2007,67(9):S185—S190
[18]  Stach J, Pekarek V, Grabic R et al., Dechlorination of Polychlorinated Biphenyls, Dibenzo-p-dioxins and Dibenzofurans on Fly Ash [J]. Chemosphere,2000, 41(12):1881—1887
[19]  陈彤,谷月玲,严建华等,氯苯在飞灰表面低温生成二噁英的特性 [J].燃烧科学与技术,2006, 12(3):253—256

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