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

页码：337 / 347

页数：11

共 49 条

[1] Radical generation by the interaction of transition metals with common oxidants [J].