Efficient catalytic degradation of bisphenol A by novel Fe0- vermiculite composite in photo-Fenton system: Mechanism and effect of iron oxide shell. (October 2018)

• Record Type: Journal Article
• Authors: Yang, Shanshan; Wu, Pingxiao; Ye, Quanyun; Li, Wen; Chen, Meiqing; Zhu, Nengwu
• Is Part Of: Chemosphere. Volume 208(2018)
• Page Start: 335
• Page End: 342
• Publication Date: 2018-10
• Subjects: Zero-valent iron -- Iron oxide shell -- BPA -- Photo-Fenton -- Vermiculite; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.06.008
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Novel Fe 0 -vermiculite (Fe-Ver-C-H2 ) composite was synthesized by thermal reduction and acted as catalysts to remove bisphenol A (BPA) in photo-Fenton system. In term of activation ability toward H2 O2, separation ability and stability, Fe-Ver-C-H2 presented obvious advantages over other kinds of Fe 0 -vermiculite composite (Fe-Ver-NaBH4 ), which obtained by traditional liquid reduction. The reason was that iron oxide shells on the surface of Fe 0 were α-Fe2 O3 and Fe3 O4 for Fe-Ver-NaBH4 and Fe-Ver-C-H2, respectively. And for Fe-Ver-C-H2, the synergistic effect between iron core (Fe 0 ) and iron oxide shell (Fe3 O4 ) is beneficial to catalytic performance. The mechanism and plausible pathway of BPA degradation were also proposed according to the results of radical scavenger studies and gas chromatography-mass spectrometry (GC-MS), respectively. In addition, factorial effects for Fe-Ver-C-H2 in photo-Fenton system were also investigated and optimized as: pH of 5, dosage of 0.2 g L −1 and H2 O2 concentration of 20 mM. This study presented a facile method to synthesize novel Fe 0 -vermiculite composite and provided a new sight to investigate the effect of iron oxide shell on the catalytic performance when Fe 0 -vermiculite composite acted as catalyst to remove contaminants from the environment in photo-Fenton system. Graphical abstract: Image 1 Highlights: Novel Fe 0 -vermiculite (Fe-Ver-C-H2 ) composite were synthesized and characterized. The better catalytic ability was due to synergistic effect between Fe 0 and Fe3 O4 . The degradation mechanism of BPA by Fe-Ver-C-H2 was proposed.