Oxidation of bisphenol A by persulfate via Fe3O4-α-MnO2 nanoflower-like catalyst: Mechanism and efficiency

被引：215
作者：
Dong, Zhengyu [1 ,2 ]
Zhang, Qian [1 ,2 ]
Chen, Bor-Yann [3 ]
Hong, Junming [1 ,2 ]
机构：
[1] Huaqiao Univ, Dept Environm Sci & Engn, Xiamen 361021, Peoples R China
[2] Huaqiao Univ, Fujian Prov Res Ctr Ind Wastewater Biochem Treatm, Xiamen 361021, Peoples R China
[3] Natl Ilan Univ, Dept Chem & Mat Engn, Ilan 26047, Taiwan
来源：
CHEMICAL ENGINEERING JOURNAL | 2019年 / 357卷
关键词：
BPA degradation; Fe3O4-alpha-MnO2; Hydroxyl groups; Synergistic effect; DISRUPTING COMPOUNDS EDCS; WASTE-WATER TREATMENT; MICROBIAL FUEL-CELLS; SULFATE RADICALS; PHENOL DEGRADATION; ALPHA-MNO2; NANOSTRUCTURES; BIOELECTRICITY GENERATION; HETEROGENEOUS OXIDATION; AQUEOUS-SOLUTION; MEDICINAL HERBS;
D O I：
10.1016/j.cej.2018.09.179
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A novel and high-efficiency Fe3O4-alpha-MnO(2 )nanoflower-like catalyst was synthesized using a two-step hydrothermal method. The catalyst was used to activate persulfate (PS) to degrade bisphenol A (BPA) in aqueous phase. The mechanism of the Fe3O4-alpha-MnO2/PS system was investigated. X-ray photoelectron spectra and cyclic voltammograms showed that the mixed valence of Fe3O4-alpha-MnO2 was favorable to electron transfer between Fe and Mn elements. Apparently, this process promoted the circulation of Fe2+/Fe3+ and Mn3+/Mn4+, increasing the effectiveness of the catalyst to activate the PS. In addition, with ATR-FTIR analysis, the influence of phosphate confirmed the presence of -OH groups on the Fe3O4-alpha-MnO(2 )surface. Thus, these groups played crucial roles in the PS activation. Sulfate radicals were reacting species of great importance in BPA degradation. The degradation intermediates were also detected via GC-MS analysis, and the possible BPA degradation pathway was proposed.
引用
收藏
页码：337 / 347
页数：11
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