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首页> 外文期刊>Journal of Hazardous Materials >Occurrence, accumulation, attenuation and priority of typical antibiotics in sediments based on long-term field and modeling studies
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Occurrence, accumulation, attenuation and priority of typical antibiotics in sediments based on long-term field and modeling studies

机译：基于长期研究和模型研究的沉积物中典型抗生素的发生，积累，衰减和优先级

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摘要

Long-term field and modeling studies were performed to measure and predict occurrence, accumulation, attenuation and priority of typical antibiotics in sediments of the Dagu River in China. The results indicated that the concentrations of antibiotics ranged from lower than the limit of detection to 12.4mg/kg, depending on the accumulation time of these antibiotics in sediments. Compared with the residential and industrial areas, the agricultural region of the watershed was a major source of antibiotic contamination in sediments. Accumulation and attenuation kinetics models were established and successfully applied in the field study. For instance, by 2100, the accumulation model predicted that the concentrations of roxithromycin and oxytetracycline would rise to 13 and 7.3 mg/kg, respectively. The first and second order attenuation kinetics models revealed the fate of these antibiotics along the downstream and upstream sediments, respectively. The half-life distances of antibiotic attenuation ranged from 3.5 to 12.4 km. Based on the contamination level and trend, a priority factor and an accumulation growth factor were defined to identify the priority pollutants from the antibiotics. Gentamicin and roxithromycin were recognized as the top priority pollutants among the tested antibiotics. In the future, a wider applicability of the methods and models needs to be explored and suggested.
机译：进行了长期的现场和模型研究，以测量和预测中国大沽河沉积物中典型抗生素的发生，积累，衰减和优先级。结果表明，抗生素的浓度范围从低于检出限到12.4mg / kg，这取决于这些抗生素在沉积物中的积累时间。与住宅区和工业区相比，流域的农业区是沉积物中抗生素污染的主要来源。建立了累积和衰减动力学模型，并将其成功应用于野外研究。例如，到2100年，累积模型预测罗红霉素和土霉素的浓度将分别上升到13和7.3 mg / kg。一阶和二阶衰减动力学模型分别揭示了这些抗生素沿下游和上游沉积物的命运。抗生素衰减的半衰期距离为3.5至12.4 km。根据污染水平和趋势，定义了优先因子和累积增长因子，以从抗生素中识别出优先污染物。庆大霉素和罗红霉素被认为是测试抗生素中最优先的污染物。将来，需要探索和提出方法和模型的更广泛的适用性。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.91-98|共8页
  • 作者

    Xiangang Hu; Kangxin He; Qixing Zhou;

  • 作者单位

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;

    Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    antibiotic; attenuation; accumulation; priority pollutant; kinetics model;

    机译：抗生素;衰减;积累;优先污染物;动力学模型;

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