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首页> 外文期刊>Journal of environmental science and health >Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H_2O_2 process
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Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H_2O_2 process

机译：UV / H_2O_2工艺降解水溶液中对羟基苯甲酸甲酯的实验和数值研究

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摘要

The present paper aims at presenting a kinetic model that is supposed to result in the decomposition of methylparaben in completely mixed batch reactor (CMBR) using the UV/H2O2 process. The proposed model incorporates photochemical, chemical reactions and their constant rates to formulate the overall kinetic rate expressions which are integrated into MATLAB. Thus, the changes in pH values during the process of oxidation are taken into consideration. In addition, the effects of hydrogen peroxide (HP) dosage, as well as the concentration of hydroxyl radicals, are examined. Accordingly, the pseudo-first-order rate constant, its variation as functions of HP concentration, incident UV-light intensity and the limitations of the adopted approach are discussed. In line with that, the authors provided evidence of the validity of the kinetic model through the exposure of previous experimental studies as reported in the literature review then through the evidence of the present experimental data.
机译：本文旨在提供一个动力学模型，该模型被认为会导致使用UV / H2O2工艺在完全混合间歇式反应器（CMBR）中分解对羟基苯甲酸甲酯。所提出的模型结合了光化学反应，化学反应及其恒定速率，从而制定了集成到MATLAB中的整体动力学速率表达式。因此，考虑到了氧化过程中pH值的变化。此外，还检查了过氧化氢（HP）用量以及羟基自由基浓度的影响。因此，讨论了伪一阶速率常数，其随HP浓度，入射紫外线强度的变化以及所采用方法的局限性。与此相一致，作者通过文献综述中报道的先前实验研究以及当前实验数据的证据提供了动力学模型有效性的证据。

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