Degradation of 2,4,6-trichlorophenol using magnetic nanoscaled Fe3O4/CeO2 composite as a heterogeneous Fenton-like catalyst
Degradation of 2,4,6-trichlorophenol using magnetic nanoscaled Fe3O4/CeO2 composite as a heterogeneous Fenton-like catalyst
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使用磁性纳米级 Fe3O4/CeO2 复合材料作为非均相类芬顿催化剂降解 2,4,6-三氯苯酚
DOI：
10.1016/j.seppur.2015.05.011
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发表时间：
2015-07
影响因子：
8.6
通讯作者：
Wang Jianlong
中科院分区：
文献类型：
--
作者：
Xu Lejin;Wang Jianlong
采用磁性纳米Fe3O4/ ceo2复合材料作为非均相fenton类催化剂，研究了其对2,4,6-三氯苯酚（TCP）的降解。采用中心复合设计（CCD），采用响应面法（RSM）研究了溶液pH、初始TCP浓度、Fe3O4/ ceo2投加量和h2o2浓度对TCP去除、矿化和脱氯的影响。最佳降解区域为pH 2.0 ~ 2.1、TCP 20 ~ 100 mg/L、Fe3O4/ ceo21.5 ~ 2.5 g/L和h2o217 ~ 30 mM，在pH 2.0、TCP 100 mg/L、Fe3O4/CeO22.5 g/L和H2O230 mM条件下，90 min后TCP的去除率为99%，矿化率为65%，脱氯率为95%，与模型预测吻合较好。与其他工艺相比，Fe3O4/ ceo_2对TCP的去除表现出较高的催化能力。考察了Fe3O4/ ceo2的可回收性。根据铁浸出的结果、自由基清除剂的作用和中间体的测定，提出了一种基于自由基dotOH机制（包括体液中的自由基dotOH和表面边界自由基dotOH）的TCP降解途径。
The degradation of 2,4,6-trichlorophenol (TCP) was investigated by using magnetic nanoscaled Fe3O4/CeO2composite as a heterogeneous Fenton-like catalyst. The individual and interactive effects of four process variables, i.e. solution pH, initial TCP concentration, Fe3O4/CeO2dosage and H2O2concentration, on TCP removal, mineralization and dechlorination were investigated by response surface methodology (RSM) using the central composite design (CCD). The optimal regions of degradative conditions were pH 2.0–2.1, TCP 20–100 mg/L, Fe3O4/CeO21.5–2.5 g/L, and H2O217–30 mM. The removal efficiency, mineralization and dechlorination rate of TCP was 99%, 65% and 95% after 90 min, respectively under the conditions of pH 2.0, TCP 100 mg/L, Fe3O4/CeO22.5 g/L and H2O230 mM, which agreed well with the modeling prediction. Fe3O4/CeO2showed a high catalytic ability for the removal of TCP in comparison with other processes. The recyclability of Fe3O4/CeO2was also examined. According to the results of iron leaching, the effects of radical scavengers and intermediates determination, a possible pathway of TCP degradation was proposed based onradical dotOH mechanism (including freeradical dotOH in the bulk liquid and surface-boundedradical dotOH).
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影响因子：
22.1
作者：
Hui Wang;Jianlong Wang
通讯作者：
Hui Wang;Jianlong Wang
影响因子：
13.6
作者：
M. Vedrenne;R. Vasquez-Medrano;D. Prato-Garcia;B. Frontana-Uribe;M. Hernández-Esparza;J. M. de Andrés
通讯作者：
M. Vedrenne;R. Vasquez-Medrano;D. Prato-Garcia;B. Frontana-Uribe;M. Hernández-Esparza;J. M. de Andrés
影响因子：
22.1
作者：
J. Bandara;J. Mielczarski;A. López;J. Kiwi
通讯作者：
J. Bandara;J. Mielczarski;A. López;J. Kiwi
影响因子：
8.6
作者：
Xiaobiao Zhu;Jinping Tian;Rui Liu;Lu-jun Chen
通讯作者：
Xiaobiao Zhu;Jinping Tian;Rui Liu;Lu-jun Chen
DOI：
10.1007/s11270-012-1343-x
发表时间：
2012-10
期刊：
Water, Air, & Soil Pollution
影响因子：
--
作者：
Yajun Wen;Yunhai Wu
通讯作者：
Yajun Wen;Yunhai Wu