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Sorption behaviors of antimicrobial and antiparasitic veterinary drugs on subtropical soils

机译：抗菌和抗寄生虫兽药在亚热带土壤上的吸附行为

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Brazil is one of the world's largest producers of animal protein, requiring the large-scale use of veterinary drugs. The administration of antimicrobials and antiparasitics is a common practice. However, there is a lack of information on how these drugs impact the environment. Antimicrobials are capable of altering the soil microbial population and are responsible for the development of multidrug-resistant microbial strains. Therefore, it is important to evaluate the fate and transport of these compounds in the environment, and one parameter used for this purpose is the soil-water partition coefficient. In this work, an assessment was made of the soil sorption behaviors of 18 drugs from seven different families, including antimicrobials (sulfonamides, fluoroquinolones, amphenicols, and macrolides) and antiparasitic drugs (milbemycin, avermectins, and benzimidazoles). Seven subtropical soils of different textural classes were tested. The Freundlich sorption coefficients, expressed as mu g(1-1) (cm(3))(1) g(-1), were in the following ranges: 0.45 to 19 (sulfonamides), 72 to 2410 (fluoroquinolones), 9 to 58 (thiabendazole), 0.03 to 0.48 (florfenicol), 105 to 424 (moxidectin), 14 to 184 (avermectins), and 1.5 to 74 (macrolides). The results showed that the drugs belonging to the same family, with chemical structures in common, presented similar behaviors regarding sorption and desorption, for the different soils tested and are generally in agreement with soils from temperate regions. The data set obtained in this work give an overview of the fate of the veterinary drugs in Brazilian subtropical soils with different textures and composition and can be very helpful for exposure risk assessments. (C) 2018 Elsevier Ltd. All rights reserved.
机译：巴西是世界上最大的动物蛋白生产国之一，需要大规模使用兽药。抗生素和抗寄生虫药的施用是一种常见的做法。但是，缺乏有关这些药物如何影响环境的信息。抗菌素能够改变土壤微生物的数量，并负责开发具有多重耐药性的微生物菌株。因此，评估这些化合物在环境中的命运和运输非常重要，为此目的使用的一个参数是土壤-水分配系数。在这项工作中，评估了来自七个不同家族的18种药物在土壤中的吸附行为，包括抗菌剂（磺酰胺，氟喹诺酮类，安非尼和大环内酯类）和抗寄生虫药物（米尔倍霉素，阿维菌素和苯并咪唑类）。测试了七种不同质地类别的亚热带土壤。表示为μg（1-1 / n）（cm（3））（1 / n）g（-1）的Freundlich吸附系数在以下范围内：0.45至19（磺酰胺），72至2410（氟喹诺酮），9至58（噻苯达唑），0.03至0.48（氟苯尼考），105至424（莫昔克丁），14至184（阿维菌素）和1.5至74（大环内酯）。结果表明，属于同一家族的具有相同化学结构的药物，对于所测试的不同土壤，在吸附和解吸方面表现出相似的行为，并且通常与温带地区的土壤一致。在这项工作中获得的数据集概述了具有不同质地和成分的巴西亚热带土壤中兽药的命运，对于评估暴露风险非常有帮助。 （C）2018 Elsevier Ltd.保留所有权利。

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