Abstract：
Solid-phase extraction and ultra-high performance liquid chromatography-mass spectrometry were used to detect and analyze the contamination of nine typical endocrine disrupting chemicals (EDCs) in drains flowing into the Yellow River of Ningxia. Sources of these EDCs were analyzed, and their risks were assessed. The results showed that EDCs were detected in drains at all 33 sampling sites, with total concentrations （ΣEDCs） of 82.28-1730.09 ng·L-1. Among phenolic compounds, bisphenol A (BPA) and nonylphenol (NP) were two that were more commonly detected EDCs, with the detection rates above 90%; estrone (E1) and estriol (E3) were more commonly detected estrogenic compounds, both with detection rates of 79%. On a spatial scale, the average concentrations of ΣEDCs in the drains in Shizuishan and Yinchuan were much higher than those in Wuzhong and Zhongwei. Concentrations of ΣEDCs at the sampling sites before flowing into Yellow River ranged from 82.28 to 979.82 ng·L-1. The source analysis showed that industrial wastewater and domestic sewage were two primary sources for BPA, whereas industrial wastewater was the primary source for OP. The primary sources of E1 and E3 were livestock and poultry breeding wastewater and domestic sewage, respectively. Risk assessment results showed that EDCs in drains flowing into the Yellow River posed low or moderate ecological risk but high risk for estrogenic activity at all sampling sites.
摘要：
采用固相萃取和超高效液相色谱-质谱联用技术对宁夏引黄水渠中9种典型内分泌干扰物(EDCs)污染情况进行检测和分析。分析了这些EDC的来源，并对其风险进行了评估。结果表明，在所有33个采样点的排水沟中均检测到EDC，总浓度（ΣEDCs）为82.28-1730.09ng·L-1。在酚类化合物中，双酚A（BPA）和壬基酚（NP）是两种更常见的EDC，检出率在90%以上；雌酮（E1）和雌三醇（E3）是更常见的检测雌激素化合物，两者的检出率均为79%。在空间尺度上，石嘴山和银川市排水沟中ΣEDCs的平均浓度远高于吴忠市和中卫市。流入黄河之前，采样点的ΣEDC浓度范围为82.28至979.82ng·L-1。来源分析表明，工业废水和生活污水是双酚A的两个主要来源，而工业废水是OP的主要来源。E1和E3的主要来源是畜禽养殖废水和生活污水,分别。风险评估结果表明，流入黄河的排水沟中的EDC在所有采样点都具有低或中等的生态风险，但具有较高的雌激素活动风险。
