Fe (II)-activated persulfate oxidation effectively degrades iodoform in water: Influential factors and kinetics analysis
Fe (II)-activated persulfate oxidation effectively degrades iodoform in water: Influential factors and kinetics analysis
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Fe (II) 激活的过硫酸盐氧化有效降解水中的碘仿：影响因素和动力学分析
DOI：
10.1016/j.arabjc.2020.01.023
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发表时间：
2020-04
影响因子：
6
通讯作者：
Li Mu
中科院分区：
文献类型：
--
作者：
Dong Zijun;Wang Feng;Song Xiulan;Zhang Miao;Jiang Chengchun;Sun Feiyun;Li Mu
碘仿（CHI 3）是饮用水预氧化消毒过程中产生的消毒副产物之一。采用Fe（II）活化的过硫酸盐氧化法（Fe 2 +/PS）降解碘仿，考察了反应物初始浓度、反应参数、动力学模型等因素对降解的影响，揭示了Fe 2 +/PS氧化降解CHI 3的机理。结果表明，Fe 2 +/PS摩尔比为1：5，PS初始浓度为15 μmmol/L，pH值为3.0时为最佳工艺条件。另外，较高的温度有利于CHI 3的去除和脱碘。该动力学模型有两个不同的反应步骤：在反应的前十分钟快速反应;然后是一个慢得多的反应。TBA和MeOH对该反应的抑制作用表明，SO 4-·和·OH的共同作用有助于CHI 3的降解，但·OH起主导作用。降解途径和总释放碘物质的产物证明了Fe 2 +/PS氧化过程对CHI 3降解的适用性。结果表明，Fe 2 +/PS氧化工艺是一种有效的深度氧化去除水中CHI 3的工艺。
Iodoform (CHI3) is one of the disinfection by-products (DBPs) that is formed in the pre-oxidation and disinfection processes of drinking water treatment. In this study, Fe(II)-activated persulfate oxidation (Fe2+/PS) was employed to degrade iodoform, the effects of initial reactants concentration, reaction parameters, kinetics model were investigated, and the underlying mechanisms of CHI3degradation in Fe2+/PS oxidation process was unveiled. The results showed that the mole ratio Fe2+/PS of 1:5, initial PS concentration of 15 μmmol/L, and pH of 3.0 were identified as the optimum operating parameters. In addition, a relatively higher temperature could enhance CHI3removal and deiodination. The kinetic model has two different reaction steps: a fast one during the first ten minutes of reaction; then followed by a much slower one. Suppression of the reaction by TBA and MeOH showed that the combined effects of SO4−· and ·OH contributed to the degradation of CHI3, but ·OH played a dominant role. The degradation pathways and the products of total liberated iodine species demonstrate that the applicability of the Fe2+/PS oxidation process for CHI3degradation. These results indicated that the Fe2+/PS oxidation process is an effective advanced oxidation process for CHI3removal in water treatment.
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影响因子：
12.8
作者：
Wang, Xianshi;Liu, Yulei;Ma, Jun
通讯作者：
Ma, Jun
影响因子：
13.6
作者：
Duan, Xiaodi;He, Xuexiang;Dionysiou, Dionysios D.
通讯作者：
Dionysiou, Dionysios D.
影响因子：
15.1
作者：
I. Velo-Gala;J. López-Peñalver;M. Sánchez-Polo;J. Rivera-Utrilla
通讯作者：
I. Velo-Gala;J. López-Peñalver;M. Sánchez-Polo;J. Rivera-Utrilla
影响因子：
11.4
作者：
Guangyin Zhen;Xueqin Lu;Youcai Zhao;Xiaoli Chai;Dong-jie Niu
通讯作者：
Guangyin Zhen;Xueqin Lu;Youcai Zhao;Xiaoli Chai;Dong-jie Niu
影响因子：
13.6
作者：
Rao, Y. F.;Qu, Liang;Chu, W.
通讯作者：
Chu, W.