科研之友
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摘要
The extensive utilization of veterinary antibiotics in agricultural husbandry has led to worldwide pollution in the soil environment. To better evaluate the fate of the antibiotic tetracycline (TC) in soil, its degradation in different soil samples was analyzed. Under static experimental conditions, TC degradation in the selected soils followed first-order kinetics, with a half-life ranging from 9.68 to 12.31 days. A marked decline in the efficiency of soil TC degradation was observed in the presence of increasing organic matter content. In contrast, the microbial community played a minor role in TC soil degradation process. Upon degradation for 21 days, most of the TC in soil was degraded; in contrast, minor mineralization of the compounds happened in the process indicating that the formation of intermediate degradation products was of much possibility. These possible degradation products were then analyzed using HPLC-ESI-MS, and the analytical conclusion elucidates the mechanisms of TC soil degradation, as well as the potential proposed degradation pathways.
- 出版日期2012
- 单位环境保护部南京环境科学研究所; 同济大学
