Role of Reactive Oxygen Species for 1,1,1-Trichloroethane Degradation in a Thermally Activated Persulfate System
Role of Reactive Oxygen Species for 1,1,1-Trichloroethane Degradation in a Thermally Activated Persulfate System
复制标题
活性氧在热激活过硫酸盐体系中对 1,1,1-三氯乙烷降解的作用
DOI：
10.1021/ie403689d
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发表时间：
2014-01
影响因子：
4.2
通讯作者：
Sui Qian
中科院分区：
文献类型：
--
作者：
Xu Minhui;Gu Xiaogang;Lu Shuguang;Qiu Zhaofu;Sui Qian
采用热活化过硫酸盐（PS）体系降解水溶液中的三氯乙烷（TCA）。研究了反应体系中活性氧（ROS）的产生及其在TCA降解中的作用。实验结果表明，在50 °C下，30 mM聚苯乙烯（PS）浓度下，0.15 mM三氯乙酸（TCA）在1 h内被完全氧化，TCA降解和PS分解符合准一级动力学模型。此外，还建立了检测活性氧的化学探针法。结果表明，系统中均有SO 4·-、HO·和O2·-产生，且产生强度随PS浓度的增加而增强。PS在溶液中的持久性测试表明，在最初的2 h内，氧化物种增强，表明产生了更多的SO 4·-和HO·，而在12 h后，SO 4·-和HO·的强度略有降低。反应后体系中产生的O2·-保持在一个稳定的水平，但在反应过程中，O2·-的浓度随反应时间的延长而增加。
A thermally activated persulfate (PS) system was applied to degrade 1,1,1-trichloroethane (TCA) in aqueous solution. The generation of reactive oxygen species (ROS) in the system and their roles in TCA degradation were investigated. The experimental results showed that TCA (0.15 mM) could be completely oxidized in 1 h at 50 °C with a PS concentration of 30 mM. TCA degradation and PS decomposition well fitted a pseudo-first-order kinetic model. In addition, the chemical probe method was developed to identify the ROS. The results showed that SO4•–, HO•, and O2•– were all generated in the system and the generation intensities could be strengthened with the increase of PS concentration. The tests for PS persistence in solution indicated that oxidative species were intensified during the initial 2 h, suggesting more SO4•– and HO• were generated, whereas after 12 h SO4•– and HO• intensities were slightly reduced. In contrast, O2•– generated in the system was maintained at a stable level after reaction but at a ...
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超声波增强磁铁矿催化剂对过二硫酸盐的非均相活化降解水中四环素
影响因子：
8.6
作者：
Hou, Liwei;Zhang, Hui;Xue, Xiaofei
通讯作者：
Xue, Xiaofei
影响因子：
8.8
作者：
Liang, CJ;Bruell, CJ;Sperry, KL
通讯作者：
Sperry, KL
影响因子：
15
作者：
KOLTHOFF, IM;MILLER, IK
通讯作者：
MILLER, IK
DOI：
10.1061/(asce)ee.1943-7870.0000323
发表时间：
2011-04-01
期刊：
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
影响因子：
--
作者：
Furman, Olha S.;Teel, Amy L.;Watts, Richard J.
通讯作者：
Watts, Richard J.
影响因子：
15.1
作者：
Ghauch, Antoine;Tuqan, Al Muthanna;Kibbi, Nadine
通讯作者：
Kibbi, Nadine