Transformation of tetracycline during chloramination: kinetics, products and pathways.
作者： Yi Wan , Ai Jia , Zhou Zhu , Jianying Hu
DOI: 10.1016/J.CHEMOSPHERE.2012.09.001
关键词:
摘要: To assess the potential adverse effects stemming from tetracycline (TC) in drinking water or disinfected wastewater, kinetics of chloramination TC was investigated at room temperature, transformation products and pathways their generation were elucidated, growth inhibiting properties towards sludge bacteria assessed. The exhibited pseudo-first-order with rate constants (k(obs)) ranging 0.0082 to 0.041 min(-1) pH 6-8. Chloramination generated least 13 discernible products, structures 12 including five chlorinated compounds, identified using LC-ESI-MS. Two main for these proposed: (1) chlorine substitution reactions followed by dehydration; (2) oxidization chloramine. proposed be further degraded small molecules via scission benzene rings TC, two (2,11a-dihydroxy-keto-TC 6,11-epoxy-2,11a-dihydroxy-TC) final obtained under experimental conditions. solution, even without detection greater than 80% inhibitory bacteria, suggesting on microorganisms aquatic environment.
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