Journal
CHEMICAL ENGINEERING JOURNAL
Volume 390, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124582
Keywords
Binary metal oxidative; Visible light; Dibismuth copper oxide; Synergistic effect; PPCPs removal
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Funding
- Guangdong Natural Science Funds for Distinguished Young Scholar [2020B151502087]
- China Postdoctoral Science Foundation [2019M663383]
- Key Laboratory of Resource Chemistry, Ministry of Education [KLRC_ME1901]
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The widespread use of pharmaceuticals and personal care products (PPCPs) is posing serious environmental issues, and it is imperative to develop an effective treatment for removing PPCPs. Herein, we used a binary metal oxide of dibismuth copper oxide (CuBi2O4) to activate peroxymonosulfate (PMS) for removing PPCPs. Interestingly, above system was evidently improved by introducing visible light. Photocatalysis and the synchronous transformations of Bi3+/Bi5+ and Cu2+/Cu+ valence states over CuBi2O4 are combined organically. Such a synergistic effect promotes the production of more active species (e.g., O-1(2), h(+), center dot OH, SO4 center dot-) for further resulting in the rapid degradation of PPCPs. Taking tetracycline (TC) degradation as a model, the detailed degradation pathways of TC and the toxicity of degraded products were identified. This work not only provides a facile yet effective catalytic reaction system for removing PPCPs, but also gives some further insights to understand the reaction mechanism involving Bi-based or other like binary metal oxidative materials.
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