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首页> 外文会议>International Ozone Association 16th world congress: abstracts and full papers of oral presentations >Degradation of Aqueous Phenol and ChlorinatedPhenols by Ozone
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Degradation of Aqueous Phenol and ChlorinatedPhenols by Ozone

机译：臭氧降解水性苯酚和氯化苯酚

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摘要

The degradation of phenol, its chlorinated derivatives with ozone wasrnstudied. The compounds studied were phenol (Ph), 4 – chlorophenol (4-rnCPh) and 2,4 – dichlorophenol (2,4-DCPh). The kinetic performance ofrneach phenolic compound and their model mixture was examined. ThernpH influence over the decomposition dynamic for different phenolicrncompounds in the range of 2 – 12 was investigated. An increase of therndecomposition rate when we had a pH increasing was observed. In thernstudied range of the pH, phenol and chlorophenols ozonation proceedsrnrapidly. The UV absorbency was used for the preliminary control of therndecomposition degree. The HPLC analysis was realized to identify thernintermediates and final products formed during the ozonation. It wasrnshown that the basic intermediates are muconic and fumaric acids,rnmalonic and maleic acids and having a very small content of catecholrn(less than 1%). The final products are basically oxalic acid (90%) andrnformic acid. Intermediates and final products of the ozonation havernbeen measured as a function of time using HPLC. Furthermore, thernintermediates and final decomposition products obtained by differentrnpH were compared. According to the identification results, a possiblernmechanism of the ozonation by the reaction of hydroxylation andrndechloration in the early stage was proposed.
机译：研究了苯酚及其氯代衍生物的臭氧降解作用。研究的化合物为苯酚（Ph），4-氯苯酚（4-rnCPh）和2,4-二氯苯酚（2,4-DCPh）。检查了每种酚类化合物及其模型混合物的动力学性能。研究了pH值对2 – 12范围内不同酚类化合物分解动力学的影响。当pH增加时，观察到分解速率的增加。在所研究的pH范围内，苯酚和氯酚的臭氧化反应迅速进行。将紫外线吸收率用于热分解度的初步控制。实现了HPLC分析以鉴定在臭氧化过程中形成的中间体和最终产物。结果表明，基本中间体为粘康酸和富马酸，丙二酸和马来酸，儿茶酚含量非常低（小于1％）。最终产物基本上是草酸（90％）和甲酸。使用HPLC测量了臭氧化的中间体和最终产物随时间的变化。此外，比较了不同pH值得到的中间体和最终分解产物。根据鉴定结果，提出了早期羟基化和脱氯反应进行臭氧化反应的可能机理。

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