Qingdao Municipal Bureau of Ecology and Environment, Qingdao, Shandong, 266003, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong, 266237, China.
Chemosphere. 2021 Sep;279:130381. doi: 10.1016/j.chemosphere.2021.130381. Epub 2021 Mar 28.
The spatiotemporal distribution, source apportionment and combined pollution of 14 antibiotics in natural waters adjacent to mariculture farms of Laizhou Bay in the Bohai Sea were studied. The contribution proportion and quantity of each potential pollution source to antibiotics in natural water bodies were quantitatively described. The correlations between heavy metals and antibiotics and their underlying mechanisms in natural and aquaculture water environment were analyzed. Fourteen antibiotics were detected in natural water and sediment in the coastal area of Laizhou Bay. The maximum concentrations of sulfamethazine and trimethoprim in water reached tens or even hundreds of μg/L in winter. Trimethoprim was the main antibiotic in natural water bodies in winter and summer, and enrofloxacin was the principal antibiotic in sediments. Enrofloxacin, ciprofloxacin and oxytetracycline were detected in all underground water samples; thus, control of these antibiotics needs to be made a priority to mitigate groundwater contamination. PCA-MLR revealed that the potential sources of antibiotics in natural waters of Laizhou Bay include the mariculture wastewater (18.3%), the domestic sewage (63.3%) and the livestock wastewater (18.4%). Therefore, the antibiotic burden of Laizhou Bay was principally from the domestic sewage. In natural water, the concentration of Cu was positively correlated with antibiotics, which might be related to the common sources, the competitive adsorption in sediments and the easy complexation characteristic of Cu and antibiotics. Positive correlations among antibiotics and heavy metals were observed in mariculture sediments, while negative relationships were observed in natural sediments.
研究了渤海莱州湾养殖区邻近海域天然水中 14 种抗生素的时空分布、来源解析及复合污染。定量描述了各潜在污染源对天然水体中抗生素的贡献比例和数量。分析了天然和养殖水环境中重金属与抗生素的相关性及其内在机制。在莱州湾沿海地区的天然水和沉积物中检测到 14 种抗生素。冬季水中磺胺嘧啶和甲氧苄啶的最大浓度可达数十甚至数百μg/L。甲氧苄啶是冬季和夏季天然水体中的主要抗生素，恩诺沙星是沉积物中的主要抗生素。所有地下水样品中均检测到恩诺沙星、环丙沙星和土霉素；因此，需要优先控制这些抗生素以减轻地下水污染。PCA-MLR 表明，莱州湾天然水中抗生素的潜在来源包括养殖废水（18.3%）、生活污水（63.3%）和畜禽废水（18.4%）。因此，莱州湾的抗生素负担主要来自生活污水。在天然水中，Cu 的浓度与抗生素呈正相关，这可能与它们的共同来源、沉积物中的竞争吸附以及 Cu 和抗生素的易络合特性有关。养殖沉积物中抗生素与重金属之间存在正相关关系，而天然沉积物中则存在负相关关系。
