Sun Pengfei, Tan Yongyu, Zhu Zuhao, Yang Tinglong, Thevarajan Shalini, Zhang Li
Guangxi Beibu Gulf Key Laboratory of Marine Resources, Environment and Sustainable Development, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China.
Key Laboratory of Tropical Marine Ecosystem and Bioresource, Fourth Institute of Oceanography, Ministry of Natural Resources, Beihai 536000, China.
Antibiotics (Basel). 2024 Aug 28;13(9):820. doi: 10.3390/antibiotics13090820.
In recent years, the widespread application of antibiotics has raised global concerns, posing a severe threat to ecological health. In this study, the occurrence, source, and ecological risks of 39 antibiotics belonging to 5 classes in mangrove sediments from Lianzhou Bay, China, were assessed. The total concentrations of the antibiotics (∑39 antibiotics) ranged from 65.45 to 202.24 ng/g dry weight (dw), with an average of 142.73 ± 36.76 ng/g dw. The concentrations of these five classes of antibiotics were as follows: Sulfonamides (SAs) > Tetracyclines (TCs) > Fluoroquinolones (QUs) > Penicillin (PCs) > Macrolides (MLs). The spatial distribution of antibiotics varied as high tidal zone > middle tidal zone > low tidal zone. The total organic carbon (TOC), pH, nitrate (NO-N), and nitrite (NO-N) of the sediment significantly influenced the distribution of antibiotics ( < 0.05). A source analysis identified untreated sewage from aquaculture as the primary source of antibiotics in the local mangrove. A risk assessment revealed that ciprofloxacin, norfloxacin, ofloxacin of QUs, and tetracycline of TCs exhibited medium risks to algae in certain sampling sites, while other antibiotics exhibited low or no risks to all organisms. Nevertheless, the total risk of all the detected antibiotics to algae was medium in 95% of the sites. The overall ecological risk level of antibiotics in the middle tidal zone was slightly lower than in the high tidal zone and the lowest in the low tidal zone. In summary, the experimental results provided insights into the fate and transport behaviors of antibiotics in mangrove sediments from Lianzhou Bay.
近年来，抗生素的广泛应用引发了全球关注，对生态健康构成了严重威胁。本研究评估了中国廉州湾红树林沉积物中5类39种抗生素的存在情况、来源及生态风险。抗生素的总浓度（∑39种抗生素）范围为65.45至202.24纳克/克干重（dw），平均为142.73±36.76纳克/克dw。这五类抗生素的浓度如下：磺胺类（SAs）>四环素类（TCs）>氟喹诺酮类（QUs）>青霉素类（PCs）>大环内酯类（MLs）。抗生素的空间分布差异为高潮带>中潮带>低潮带。沉积物的总有机碳（TOC）、pH值、硝酸盐（NO₃-N）和亚硝酸盐（NO₂-N）显著影响抗生素的分布（P<0.05）。源分析确定未经处理的水产养殖污水是当地红树林中抗生素的主要来源。风险评估显示，喹诺酮类的环丙沙星、诺氟沙星、氧氟沙星以及四环素类的四环素在某些采样点对藻类呈现中等风险，而其他抗生素对所有生物呈现低风险或无风险。然而，在95%的采样点，所有检测到的抗生素对藻类的总风险为中等。中潮带抗生素的总体生态风险水平略低于高潮带，低潮带最低。总之，实验结果为廉州湾红树林沉积物中抗生素的归宿和迁移行为提供了见解。
