Sonophotocatalytic degradation of bisphenol A and its intermediates with graphitic carbon nitride
- Sonophotocatalytic degradation of bisphenol A and its intermediates with graphitic carbon nitride
- 나인욱; Sharmini Sunasee; Kah Hon Leong; Kien Tiek Wong; Gooyong Lee; Saravanan Pichiah; Byong-Hun Jeon; Yeomin Yoon; Min Jang
- Sonophotocatalysis; Bisphenol A; Graphitic
carbon nitride; Ultrasound; Visible light; Intermediates
- Issue Date
- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
- 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 nanostructured 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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