Antibacterial activity of the soil-bound antimicrobials oxytetracycline and ofloxacin.
作者： Feng-Jiao Peng , Li-Jun Zhou , Guang-Guo Ying , You-Sheng Liu , Jian-Liang Zhao
DOI: 10.1002/ETC.2513
关键词: Soil contamination 、 Sorption 、 Cation-exchange capacity 、 Organic matter 、 Soil water 、 Soil organic matter 、 Chemistry 、 Desorption 、 Environmental chemistry 、 Antibacterial activity
摘要: Soil contamination of antimicrobials has become an increasing concern because the potential risks to soil microbial ecosystem and human health. The present study investigated sorption desorption behaviors oxytetracycline (OTC) ofloxacin (OFL) in 3 typical soils (A, B, C), evaluated antibacterial activity soil-adsorbed compounds a pure sensitive strain Escherichia coli ATCC 25922. results showed different OTC OFL soils, that were mainly influenced by organic matter content cation exchange capacity (CEC) as well pH value. In addition, complexation cation-exchange reactions shown be main mechanisms. Strong adsorption was found B (with high content) C CEC), whereas enhanced observed A low content). also demonstrated soil-bound retained toward E. coli. Opposite patterns for 2 soils: A>B>C OFL; C>B>A OTC. This finding suggests could still exert selective pressure on bacteria although less effectively comparison with dissolved forms.
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