为研究北运河河水、药品和个人护理品( pharmaceuticals and personal care products, PPCPs) 的污染特征和生态风险, 测定了北运河通州段旱季和雨季 5 个河水水样和 43 个地下水样中 13 种 PPCPs 的质量浓度, 并采用风险熵( RQ ) 法对水体中 PPCPs 进行了生态风险评价。结果表明: 除 SMM( 磺胺间甲氧嘧啶) 和 CAP( 氯霉素) 外, 其余 11 种 PPCPs 在不同季节、不同位置的河水和地下水中均有检出, 其中: SMZ( 磺胺二甲嘧啶) 质量浓度最高达 1 373.1 ng/ L, 是研究区水体中的特征污染物; 地下水污染物检出率低于河水但其质量浓度略高于河水, 并且污染物质量浓度随离河距离增加而下降; 地下水中大部分污染物质量浓度雨季大于旱季, 并且承压水中污染物质量浓度小于潜水。由风险熵法计算可得, 除 IBU( 布洛芬) 的生态风险为高风险外, 其余污染物在不同时空条件下对研究区生态风险较低。
The contamination of 13 PPCPs( pharmaceuticals and personal care pro ducts) were analyzed in 5 river samples and 43 groundwater samples using RQ model to evaluate the potential risk during dry and rainy season to investigate the pollution characteristics and ecological risk of PPCPs in Beiyun river and groundwater of the North Canal. The results revealed that 11 out of the 13 target PPCPs were detected in Beiyun river and g roundw ater except for SMM ( Sulfamonomethoxine) and CAP ( Chloramphenicol) , SMZ ( Sulfamet hazine) was the dominant contaminant with concentr ations up to 1 373. 1 ng/ L. Concentrations of PPCPs were higher in the groundwater than river ( w ith a lower detection frequencies) , and and the mass concentr ation of pollut ants decreases as the distance from the river increases. Concentr ations of PPCPs were higher in confined aquifer than unconfined aquifer; total concentration of PPCPs in wet season was sig nificantly higher than dry season. The results of the risk assessment indicated that IBU ( Ibuprofen) may pose high risks to the eco logical environment while other PPCPs were found to be of medium or low ecological risk in the study area.
国家自然科学基金( 41730749) ; 中丹国际合作项目; 河北省水利科学研究院中德合作项目