Pan Min, Chu L M
School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China.
School of Life Sciences, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China.
Environ Pollut. 2017 Dec;231(Pt 1):829-836. doi: 10.1016/j.envpol.2017.08.051. Epub 2017 Sep 25.
Antibiotics are added to agricultural fields worldwide through wastewater irrigation or manure application, resulting in antibiotic contamination and elevated environmental risks to terrestrial environments and humans. Most studies focused on antibiotic detection in different matrices or were conducted in a hydroponic environment. Little is known about the transfer of antibiotics from antibiotic-contaminated irrigation wastewater and animal manure to agricultural soil and edible crops. In this study, we evaluated the transfer of five different antibiotics (tetracycline, sulfamethazine, norfloxacin, erythromycin, and chloramphenicol) to different crops under two levels of antibiotic-contaminated wastewater irrigation and animal manure fertilization. The final distribution of tetracycline (TC), norfloxacin (NOR) and chloramphenicol (CAP) in the crop tissues under these four treatments were as follows: fruit > leaf/shoot > root, while an opposite order was found for sulfamethazine (SMZ) and erythromycin (ERY): root > leaf/shoot > fruit. The growth of crops could accelerate the dissipation of antibiotics by absorption from contaminated soil. A higher accumulation of antibiotics was observed in crop tissues under the wastewater treatment than under manure treatment, which was due to the continual irrigation that increased adsorption in soil and uptake by crops. The translocation of antibiotics in crops mainly depended on their physicochemical properties (e.g. log K), crop species, and the concentrations of antibiotics applied to the soil. The levels of antibiotics ingested through the consumption of edible crops under the different treatments were much lower than the acceptable daily intake (ADI) levels.
抗生素通过废水灌溉或施用粪肥被添加到世界各地的农田中，导致抗生素污染，并增加了对陆地环境和人类的环境风险。大多数研究集中在不同基质中的抗生素检测，或在水培环境中进行。对于抗生素从受污染的灌溉废水和动物粪便转移到农业土壤和食用作物方面，人们了解甚少。在本研究中，我们评估了在两种抗生素污染废水灌溉和动物粪肥施肥水平下，五种不同抗生素（四环素、磺胺二甲嘧啶、诺氟沙星、红霉素和氯霉素）向不同作物的转移情况。在这四种处理下，四环素（TC）、诺氟沙星（NOR）和氯霉素（CAP）在作物组织中的最终分布如下：果实＞叶/茎＞根，而磺胺二甲嘧啶（SMZ）和红霉素（ERY）则呈现相反的顺序：根＞叶/茎＞果实。作物的生长可以通过从受污染土壤中吸收来加速抗生素的消散。与粪肥处理相比，废水处理下作物组织中观察到更高的抗生素积累，这是由于持续灌溉增加了土壤中的吸附和作物的吸收。抗生素在作物中的转运主要取决于其理化性质（如log K）、作物种类以及施用于土壤的抗生素浓度。不同处理下通过食用作物摄入的抗生素水平远低于可接受的每日摄入量（ADI）水平。
