Degradation of sulfadiazine, sulfachloropyridazine and sulfamethazine in aqueous media

Journal of Environmental Management
M Conde-CidE Álvarez-Rodríguez

Abstract

Antibiotics discharged to the environment constitute a main concern for which different treatment alternatives are being studied, some of them based on antibiotics removal or inactivation using by-products with adsorbent capacity, or which can act as catalyst for photo-degradation. But a preliminary step is to determine the general characteristics and magnitude of the degradation process effectively acting on antibiotics. A specific case is that of sulfonamides (SAs), one of the antibiotic groups most widely used in veterinary medicine, and which are considered the most mobile antibiotics, causing that they are frequently detected in both surface- and ground-waters, facilitating their entry in the food chain and causing public health hazards. In this work we investigated abiotic and biotic degradation of three sulfonamides (sulfadiazine -SDZ-, sulfachloropyridazine -SCP-, and sulfamethazine -SMT-) in aqueous media. The results indicated that, in filtered milliQ water and under simulated sunlight, the degradation sequence was: SCP > SDZ ≈ SMT. Furthermore, the rate of degradation clearly increased with the raise of pH: at pH 4.0, half-lives were 1.2, 70.5 and 84.4 h for SCP, SDZ and SMT, respectively, while at pH 7.2 they were 2...Continue Reading

Citations

Feb 14, 2020·The Science of the Total Environment·Shao-Xuan ZhangGuang-Guo Ying
Jun 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lucía Rodríguez-LópezManuel Arias-Estévez
Mar 10, 2020·Journal of Environmental Management·M Conde-CidE Álvarez-Rodríguez

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