环境持久性药物在江苏省地表水中的污染水平、分布特征及生态风险评估

江苏省作为我国的经济大省，对其进行环境持久性药物污染物（EPPPs）的污染特征与生态风险评估研究很有必要.本研究以江苏省1~4级河流和面积≥50 km²的湖泊为研究目标，对EPPPs的污染现状进行检测和分析.结果表明，江苏省地表水中共检出35种EPPPs，浓度范围为66.74~2189.83 ng·L^-1；该研究主要对检出率大于25%的17种EPPPs进行了探讨，其浓度水平为72.48~1142.79 ng·L^-1，浓度均值为345.20 ng·L^-1.EPPPs总浓度水平苏北和苏南浓度水平高于苏中地区.其中扬州市EPPPs浓度全省最高，可能主要污染来源为生活污水、航运污水排放及渔业养殖中的药物使用.EPPPs总浓度整体以京杭运河、废黄河为中线向两侧递减.对17种EPPPs的生态风险评估表明，单一目标药物对江苏省水生态风险较小；采用简单叠加模型计算出的联合毒性风险商范围为0.03~0.52，联合毒性对水生生物表现为低至中等风险.

Pollution Level, Distribution Characteristic, and Ecological Risk Assessment of Environmentally Persistent Pharmaceutical Pollutants in Surface Water of Jiangsu Province

Because Jiangsu is an important economic province of China, it is necessary to examine the pollution characteristics and assess the ecological risk of environmentally persistent pharmaceutical pollutants (EPPPs) in this region. In this study, surface water samples were obtained from grade 1-4 rivers and lakes (with an area of 50 km² or more) in Jiangsu Province, and then analyzed to determine the pollution level of EPPPs. In total, 35 EPPPs were detected in the surface water of Jiangsu Province, with total concentrations in the samples ranging from 66.74 to 2189.83 ng·L^-1. The 17 EPPPs with a detection rate of more than 25% are discussed in this study. The total concentrations of 35 EPPPs were 72.48-1142.79 ng·L^-1, and the mean concentration was 345.20 ng·L^-1. The total concentration of EPPPs was higher in the north and south than in the central part of Jiangsu. Yangzhou city had the highest concentration of EPPPs in the whole province, and the main sources of this pollution were domestic sewage, shipping sewage discharge, and drug use in fishery breeding. The total concentration of EPPPs decreased on both sides of the region, with the Beijing-Hangzhou Canal and waste from the Yellow River forming the middle line. An ecological risk assessment of 17 EPPPs showed that single target drugs posed a low risk to water ecology in Jiangsu Province. The combined risk quotient of 17 EPPPs in water of Jiangsu Province was 0.03-0.52, indicating that EPPPs posed a low to moderate risk.