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首页> 外文期刊>Journal of Hazardous Materials >Fenton-type process using peracetic acid: Efficiency, reaction elucidations and ecotoxicity
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Fenton-type process using peracetic acid: Efficiency, reaction elucidations and ecotoxicity

机译：FENTON型方法采用过乙酸：效率，反应阐明和生态毒性

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摘要

Recent studies on Fenton-type processes involving peracetic acid (PAA) stimulated further development of advanced oxidative processes (AOPs). The objective of this work was to provide new information about such processes, elucidate their reaction mechanisms both experimentally and theoretically, and verify their possible uses. The Fenton-type reaction of PAA with Fe3+ exhibited a greater dye degradation efficiency than the Fenton process, while the efficiency of the PAA reaction with Fe2+ was very close of Fenton process. Moreover, the processes photocatalyzed by solar radiation demonstrated comparable efficiencies due to the photoreduction of Fe3+ to Fe2+. By conducting theoretical calculations, it was found that the formation of oxidizing radicals during the reaction of PAA with Fe2+ was not thermodynamically favorable and, therefore, unsuitable for practical use. In contrast, the processes occurred in the PAA/Fe3+ system included thermodynamically spontaneous reactions that generated peroxyl (CH3C(O)OO center dot), alkoxyl (CH3C(O)center dot), and hydroperoxyl (HO2 center dot) radicals. The ecotoxicological tests demonstrated that the toxicity of the PAA to the organism Dugesia tigrina can be attributed to the presence of H2O2.
机译：最近关于涉及过乙酸（PAA）的FENTON型方法的研究刺激了晚期氧化过程（AOPs）的进一步发展。这项工作的目的是提供有关此类过程的新信息，在实验和理论上阐明其反应机制，并验证他们可能的用途。 PAA与Fe3 +的芬顿型反应表现出比FENTON工艺更大的染料降解效率，而PAA反应的效率与FE2 +的效率非常接近FENTON工艺。此外，由于Fe3 +至Fe2 +的光指示，由太阳辐射光催化的过程表现出相当的效率。通过进行理论计算，发现在PAA与Fe2 +的反应过程中氧化自由基而不是热力学上的良好，因此不适合实际使用。相反，PAA / Fe3 +系统中发生的方法包括产生过氧基苯（CH 3 C（O）OO中心点），烷氧基（CH 3 C（CH 3 C（O）中心点）和氢过氧基（HO2中心点）基团的热力学自发反应。生态毒理学测试表明，PAA对生物体Dugesia Tigrina的毒性可归因于H2O2的存在。

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