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- W2014290136 abstract "Photocatalytic degradation of sulfamethoxazole (SMX) was investigated using Bi2O3/Bi2O2CO3/Sr6Bi2O9 (BSO) photocatalyst under visible light (>420 nm) irradiation. The photochemical degradation of SMX followed pseudo-first-order kinetics. The reaction kinetics was determined as a function of initial SMX concentrations (5–20 mg L−1), initial pH (3–11) and BSO concentrations (6–600 mg L−1). Approximately, 90% of SMX (10 mg L−1) degradation and 36% of TOC reduction were achieved at pH 7.0 after 120 min irradiation. The main mineralization products, including NH4+, NO3−, SO42− and CO2, as well as intermediates 3-amino-5-methylisoxazole (AMI), p-benzoquinone (BZQ), and sulfanilic acid (SNA) were detected in aqueous solution. The formation of O2− radical was evidenced by using electron spin resonance and a chemiluminescent probe, luminal. A possible degradation mechanism involving excitation of BSO, followed by charge injection into the BSO conduction band and formation of reactive superoxide radical (O2−) was proposed for the mineralization of SMX. During the reaction, the O2− radical attacks the sulfone moiety and causes the cleavage of the SN bond, which leads to the formation of two sub-structure analogs, AMI and SNA." @default.
- W2014290136 created "2016-06-24" @default.
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- W2014290136 date "2013-11-01" @default.
- W2014290136 modified "2023-10-14" @default.
- W2014290136 title "Evidence of superoxide radical contribution to demineralization of sulfamethoxazole by visible-light-driven Bi2O3/Bi2O2CO3/Sr6Bi2O9 photocatalyst" @default.
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- W2014290136 doi "https://doi.org/10.1016/j.jhazmat.2013.09.048" @default.
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