Non-target organism species sensitivity distributions to oxytetracycline in water

文献类型： 外文期刊

第一作者： Zhao Xiu-Juan

作者： Zhao Xiu-Juan;Ma Rong-Cai;Zhao Xiu-Juan;Li Zhao-Jun

作者机构：

关键词： Oxytetracycline;non-target organisms;plants;aquatic organisms;species sensitivity distributions

期刊名称：RESEARCH JOURNAL OF CHEMISTRY AND ENVIRONMENT （ 影响因子：0.636； 五年影响因子：0.511 ）

ISSN： 0972-0626

年卷期： 2013 年 17 卷 8 期

页码：

收录情况： SCI

摘要： Tetracyclines (TCs), a group of structurally-related antibiotics are widely used to treat bacterial infectious and to promote animal growth in livestock and poultry breeding. They are difficult to be degraded in soils. To illustrate the different responses of crop and aquatic organisms to TCs and assess the risk of OTC to organisms in environment, oxytetracycline (OTC) was selected as model compound and ten plants were selected to test their responses to OTC by hydroponics at the level of 0.0, 0.8, 1.6, 3.2, 6.4, 12.8, 25.6, 51.2 and 120.4 mg L-1. EC50 and EC10 of OTC for ten plants ranged from 20.80 to 0.85 mg L-1 and 0.01 to 1.33 mg L-1 respectively. The largest EC50 value for barley was 24.47 times as high as the smallest EC50 value for broomcorn. The largest EC10 value for mung beans was 133 times as high as the smallest EC10 for broomcorn. The responses of different plants to OTC can be well described by BurrIII function. The hazardous concentration for 5% of the species (HC5) was 500.00. g L-1. The different toxicity of OTC to aquatic organisms was found. The fish is the most resistant to OTC and Algae (A. cylindrica) is the most sensitive to OTC among all the aquatic organisms collected in the present paper. The hazardous concentrations for 5% of the species (HC5) based on EC50 and NOEC were 30.00. mu g L-1 and 5.40. mu g L-1 respectively. The mean concentration of OTC in surface water ranged from 0.01 mu g.L-1 to 72.91 mu g.L-1. The potential affected fractions (PAF) values for aquatic organisms ranged from 0.73% to 6.91%. OTC in Nanchang farms wastewater and Shanghai piggery wastewater had the potential hazards to aquatic organisms with PAF values exceeding 5.0 % threshold.

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