东江上游典型抗生素污染特征及生态风险评价

发布时间：2018-05-28 15:19

本文选题：东江上游 + 抗生素　；参考：《生态环境学报》2016年10期

【摘要】：近年来水体中不断被检出抗生素,但在饮用水源地中对抗生素的污染状况研究很少。为了探讨东江上游水体中典型抗生素的污染特征及潜在的生态风险,利用固相萃取(SPE)及液相色谱-串联质谱(LC-MS/MS)技术,分别在时空尺度上测定了6类典型抗生素(磺胺类、喹诺酮类、β-内酰胺类、大环内酯类、四环素类、林可霉素类)的含量水平,并采用风险商法对其进行生态风险评价。结果表明:东江上游水体中被检测出的12种抗生素中,绝大部分检出率都较高,整体质量浓度范围在nd(未检出)~69.9 ng·L~(-1),其中平均质量浓度最高的3种抗生素分别是四环素(32.24 ng·L~(-1))、诺氟沙星(27.84 ng·L~(-1))、氧氟沙星(24.54 ng·L~(-1))。在时空分布上,东江上游干流抗生素的浓度主要受地表径流产生的面源污染影响,部分地区受到支流汇入的影响较大。与国内河流中抗生素的含量水平相比,东江上游抗生素浓度整体处于中等偏低水平,其中四环素和泰乐菌素相对偏高。抗生素与常规指标的相关性分析表明,抗生素大部分种类的浓度与有机物污染呈正相关,并且其含量水平受到环境因素的制约和影响。风险商法得出的生态风险评价结果表明,诺氟沙星和青霉素G存在较高风险,磺胺嘧啶、泰乐菌素、强力霉素、氧四环素和林可霉素达到了中等风险,整体上存在一定的生态风险。
[Abstract]:In recent years, antibiotics have been continuously detected in water, but the contamination of antibiotics in drinking water source is seldom studied. In order to study the pollution characteristics and potential ecological risks of typical antibiotics in the upper reaches of Dongjiang River, six kinds of typical antibiotics (sulfanilamide) were determined on a spatio-temporal scale by solid phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS / MS) technique. The contents of quinolones, 尾-lactams, macrolides, tetracyclines and lincomycin) were evaluated by risk quotient method. The results showed that, of the 12 antibiotics detected in the upper reaches of Dongjiang River, most of them had a high detection rate. The overall mass concentration was in the range of ND (69.9 ng / L ~ (-1). The three antibiotics with the highest mean mass concentration were tetracycline (32.24 ng / L), norfloxacin (27.84 ng / L) and ofloxacin (24.54 ng / L ~ (-1) respectively. In temporal and spatial distribution, the concentration of antibiotics in the upper reaches of Dongjiang River is mainly affected by the surface runoff caused by non-point source pollution, and in some areas by tributaries. Compared with the level of antibiotics in domestic rivers, the concentration of antibiotics in the upper reaches of Dongjiang River was relatively low, and the tetracycline and tylosin were relatively high in the upper reaches of Dongjiang River. The correlation analysis between antibiotics and routine indexes showed that the concentration of most kinds of antibiotics was positively correlated with organic pollution, and its content level was restricted and affected by environmental factors. The results of ecological risk assessment obtained by risk quotient method showed that norfloxacin and penicillin G had high risk, and sulfadiazine, tylosin, doxycycline, oxytetracycline and lincomycin reached medium risk. On the whole, there are certain ecological risks.
【作者单位】：上海交通大学环境科学与工程学院;中日友好环境保护中心水专项管理办公室;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX07206001)
【分类号】：X824;X522

【相似文献】