Sonophotocatalytic degradation of bisphenol A and its intermediates with graphitic carbon nitride
- Authors
- Sunasee, Sharmini; Leong, Kah Hon; Wong, Kien Tiek; Lee, Gooyong; Pichiah, Saravanan; Nah, InWook; Jeon, Byong Hun; Yoon, Yeomin; Jang, Min
- Issue Date
- Jan-2019
- Publisher
- SPRINGER HEIDELBERG
- Keywords
- Sonophotocatalysis; Bisphenol A; Graphitic carbon nitride; Ultrasound; Visible light; Intermediates
- Citation
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, v.26, no.2, pp.1082 - 1093
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
- Volume
- 26
- Number
- 2
- Start Page
- 1082
- End Page
- 1093
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/148494
- DOI
- 10.1007/s11356-017-8729-7
- ISSN
- 0944-1344
- Abstract
- Since bisphenol A (BPA) exhibits endocrine disrupting action and high toxicity in aqueous system, there are high demands to remove it completely. In this study, the BPA removal by sonophotocatalysis coupled with nano-structured graphitic carbon nitride (g-C3N4, GCN) was conducted with various batch tests using energy-based advanced oxidation process (AOP) based on ultrasound (US) and visible light (Vis-L). Results of batch tests indicated that GCN-based sonophotocatalysis (Vis-L/US) had higher rate constants than other AOPs and especially two times higher degradation rate than TiO2-based Vis-L/US. This result infers that GCN is effective in the catalytic activity in Vis-L/US since its surface can be activated by Vis-L to transport electrons from valence band (VB) for utilizing holes (h(VB)(+)) in the removal of BPA. In addition, US irradiation exfoliated the GCN effectively. The formation of BPA intermediates was investigated in detail by using high-performance liquid chromatography-mass spectrometry (HPLC/MS). The possible degradation pathway of BPA was proposed.
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