摘要
选取雅鲁藏布江最大支流拉萨河,研究其干流及主要支流枯水期表层水中9种典型内分泌干扰物(EDCs)和个人护理品(PCPs)的赋存,分布,来源及生态风险.结果表明,拉萨河中EDCs和PCPs类污染物检出率为53%~100%,其中双酚A,三氯卡班,雌三醇和咖啡因检出率>90%,各污染物平均浓度范围2.28~19.45ng/L,咖啡因和三氯生浓度最高,分别达36.8和27.4ng/L.污染物从上游至下游呈逐渐增加趋势,中上游以甾类EDCs为主且支流浓度高于干流,来源于牛羊粪便,中游水库对甾类EDCs具有明显消减作用,下游则以酚类EDCs和PCPs为主要污染物,来源于工业废水和生活污水,流经拉萨市区至汇入雅鲁藏布江前的干流段为高污染区域.依据风险熵值评价,拉萨河水生态风险整体呈下游>中游>上游趋势,鱼类相比藻类和水蚤更为敏感,甾类EDCs(17α-乙炔基雌二醇,17β-雌二醇,雌酮)对鱼类呈高风险,辛基酚在浓度较高的下游对藻类呈中风险,三氯生对水生生物风险较低,双酚A和三氯卡班无风险.
The Lhasa River,the largest tributary of the Yarlung Zangbo River,was selected to study the occurrence,distribution,sources and ecological risk of nine typical endocrine disruptors(EDCs) and personal care products(PCPs) in surface water of the main stream and tributaries during the dry season.The results showed that the detection rates of EDCs and PCPs in Lhasa River ranged from 53% to 100%,and the detection rates of bisphenol A,triclocarban,estriol and caffeine were higher than 90%.The average concentrations ranged from 2.28~19.45ng/L,with the highest concentrations of 36.8 and 27.4ng/L detected for caffeine and triclosan,respectively.The spatial distribution of pollutant concentrations increased gradually from upstream to downstream,with animal manure-sourced steroidal EDCs dominating in the middle and upper reaches and higher concentrations observed in the tributaries than the main stream.Two large reservoirs in the middle reaches had obviously reduced the concentrations of steroidal EDCs.Phenolic EDCs and PCPs were the major pollutants in the lower reaches,and the main stream from Lhasa City to Yarlung Zangbo River was the highly polluted area,with domestic sewage and industrial wastewater being the main source.Based on the risk entropy evaluation,the overall ecological risk in the Lhasa River showed a trend of downstream > midstream > upstream,with fish being more sensitive than algae and water fleas.Steroidal EDCs(17α-ethynylestradiol,17β-estradiol,and estrone) posed a high risk to fish,octylphenol posed a medium risk to algae at relatively higher concentrations of the downstream,triclosan posed a low risk to aquatic life,and bisphenol A and triclocarban had no risk.This paper provided data support for the control of emerging contaminants in important rivers on the Qinghai-Tibet Plateau.
作者
顾晓云
嘎玛卓玛
叶鑫彤
鲁旭阳
刘琛
GU Xiao-yun;GAMA Zhuo-ma;Ye Xin-tong;LU Xu-yang;LIU Chen(Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China;University of Chinese Academy of Sciences,Beijing 100049,China;Lhasa Bureau of Ecology and Environment,Lhasa 850000,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2024年第12期6908-6920,共13页
China Environmental Science
基金
国家自然科学基金项目(41871069)
四川省杰出青年科技人才项目(2020JDJQ002)。
关键词
内分泌干扰物
个人护理品
拉萨河
分布
来源
生态风险
endocrine disruptors
personal care products
Lhasa River
distribution
source
ecological risk assessment
