Zhang Biao, Xu Liang, Hu Qiongpu, Zeng Xiangying, Yu Zhiqiang
State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Environ Monit Assess. 2020 Dec 2;192(12):804. doi: 10.1007/s10661-020-08761-w.
We investigated the occurrence and distribution of 18 antibiotics in surface water from Dongting Lake, as well as in influents and effluents from a municipal wastewater treatment plant (WWTP) and a swine farm. The total concentrations of target antibiotics in surface water ranged from limit of quantification to 3107 and 5.32-107 ng L in the dry season and wet season, respectively. Among these studied antibiotics, ciprofloxacin (CIP) and lomefloxacin were as the main components in the dry season, while CIP, oxytetracycline, and chlortetracycline were the main components in the wet season. The concentrations of target compounds exhibited obvious temporal-spatial variation characteristic in the studied region, suggesting their different emission sources related to pig breeding, aquaculture, and human activities, as well as possible degradation in the aquatic system. We estimated that the daily total input and output masses of antibiotics in the influent and effluent from the swine farm were 12.1 mg d pig and 7.49 μg d pig, while they were 103 μg d inhabitant and 22.9 μg d inhabitant in the WWTP. The risk assessment results indicated that CIP posed a moderate or high risk to algae in most locations in Dongting Lake.
我们调查了洞庭湖地表水以及城市污水处理厂和养猪场的进水和出水中18种抗生素的存在情况和分布。地表水目标抗生素的总浓度在旱季和雨季分别为定量限至3107 ng/L和5.32 - 107 ng/L。在所研究的这些抗生素中，环丙沙星（CIP）和洛美沙星是旱季的主要成分，而环丙沙星、土霉素和金霉素是雨季的主要成分。目标化合物的浓度在研究区域呈现出明显的时空变化特征，表明它们的排放源与养猪、水产养殖和人类活动不同，以及在水生系统中可能的降解情况。我们估计养猪场进水和出水中抗生素的每日总输入和输出量分别为12.1 mg/(d·头猪)和7.49 μg/(d·头猪)，而污水处理厂中分别为103 μg/(d·居民)和22.9 μg/(d·居民)。风险评估结果表明，环丙沙星在洞庭湖的大多数地点对藻类构成中度或高风险。
