Wu Jerry J, Muruganandham M, Chen S H
Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan.
J Hazard Mater. 2007 Oct 1;149(1):218-25. doi: 10.1016/j.jhazmat.2007.03.071. Epub 2007 Mar 27.
The present study investigates the oxidation of dimethyl sulfoxide (DMSO) by conventional ozonation and the advanced oxidation processes (AOPs). The major degradation products identified were methanesulfinate, methanesulfonate, formaldehyde, and formic acid in ozonation process. The subsequent degradation of intermediates shows that methanesulfonate is more resistance to ozonation, which reduces the mineralization rate of DMSO. The effect of t-butanol addition and ozone gas flow dosage on the degradation rate was evaluated. The rate constant of the reaction of ozone (k(D)) with DMSO was found to be 0.4162 M(-1)S(-1). In the second part of this study, DMSO degradation and TOC mineralization were investigated using O(3)/UV, O(3)/H(2)O(2) and UV/H(2)O(2) processes. In all theses processes the degradation of target organics is more pronounced than TOC removal. The efficiencies of these processes were evaluated and discussed. The formation of sulfate ion in all AOPs have been identified and compared with other processes. Overall it can be concluded that ozonation and ozone-based AOPs are promising processes for an efficient removal of DMSO in wastewater.
本研究考察了传统臭氧化和高级氧化工艺（AOPs）对二甲基亚砜（DMSO）的氧化作用。在臭氧化过程中鉴定出的主要降解产物为甲亚磺酸盐、甲磺酸盐、甲醛和甲酸。中间体的后续降解表明，甲磺酸盐对臭氧化更具抗性，这降低了DMSO的矿化率。评估了叔丁醇添加量和臭氧气体流量对降解速率的影响。发现臭氧（k(D)）与DMSO反应的速率常数为0.4162 M(-1)S(-1)。在本研究的第二部分，使用O(3)/UV、O(3)/H(2)O(2)和UV/H(2)O(2)工艺研究了DMSO的降解和TOC矿化。在所有这些工艺中，目标有机物的降解比TOC去除更为明显。对这些工艺的效率进行了评估和讨论。已鉴定出所有AOPs中硫酸根离子的形成，并与其他工艺进行了比较。总体而言，可以得出结论，臭氧化和基于臭氧的AOPs是有效去除废水中DMSO的有前景的工艺。
