研究报告
熊涛,钱玉立,韦斯,耿金菊,于清淼,任洪强.武进港流域地表水中新污染物的高通量筛查与源解析[J].环境科学学报,2022,42(8):260-270
武进港流域地表水中新污染物的高通量筛查与源解析
- High-throughput screening and source analysis of emerging contaminants in surface water of Wujin River Basin
- 基金项目:国家自然科学基金(No.51978327);江苏省自然科学基金(No.BK20180010 ,BE2020686)
- 熊涛
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 钱玉立
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 韦斯
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 耿金菊
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 于清淼
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 任洪强
- 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京 210023
- 摘要:新污染物长期存在于水环境中,其对生态、人类健康存在的潜在危害和风险是不可忽视,而研究其在地表水中的分布特征及其来源可对新污染物的源头治理与管控提供帮助.武进港是太湖西北部的主要入湖河流之一,为了解武进港流域新污染物的分布,采用液相色谱-高分辨率质谱仪(LC-HRMS)对19处地表水样(包括主河道12个水样、支流7个水样)和污水处理厂出水水样中的新污染物进行高通量筛查.共识别出294种新污染物,其中药物类和农药类新污染物占比较大,分别为35.4%和32.3%.主成分分析表明,污水处理厂出水受新污染物污染的情况与地表水具有显著差异,同时19个地表水点位中,新污染物的分布在武进港流域存在南北地区差异.通过Mann-Whitney U检验,并绘制火山图,北部筛选出70种特征新污染物,其中药物类新污染物占比最大,为48.6%,包括咖啡因、金刚烷胺、缬沙坦等.南部筛选出17种特征新污染物,农药类占比最大,为52.9%,包括2-甲基-4-氯苯氧乙酸(MCPA)、灭草松等.相关性分析结果显示,农药类特征新污染物与农田占比呈正相关.
- Abstract:Emerging contaminants (ECs) have been present in the water environment for a long time, and their potential hazards and risks to ecology and human health cannot be ignored. their distribution and source analysis can help the management and control. Wujin River is one of the main inflow rivers in the northwest of Taihu Lake. In order to understand the distribution of ECs in the Wujin River Basin, the high-throughput screening of ECs in 19 surface water samples (including 12 water samples of the main river, 7 water samples of tributaries) and effluent water samples of the sewage treatment plant was conducted by using the liquid chromatography-high-resolution Mass Spectrometer (LC-HRMS). A total of 294 ECs were identified, with pharmaceuticals and pesticides accounted for 35.4% and 32.3%, respectively. The Principal Component Analysis (PCA) result shows that the categories of ECs in the sewage treatment plant is significantly different from the surface water. Among the 19 surface water points, the distribution of ECs varies in the north and south in the Wujin River Basin. Using the Mann-Whitney U test and drawing the Volcano Plot, 70 characteristic ECs were selected. Pharmaceuticals, including caffeine, amantadine, and valsartan, accounted for the largest proportion (48.6%). In the south of Wujin River Basin, 17 typical ECs were selected. Pesticides, including MCPA and bentazone, accounted for the largest proportion (52.9%). The correlation analysis result showed that pesticides positively correlated with the proportion of farmland.