中文摘要：

全氟化合物（perfluorinated compounds,PFCs）近年来得到国内外广泛关注,针对工业源排放区域的环境暴露、来源解析以及动物层面的生态效应有较多研究,但对于普遍存在于非工业源（生活源）的城市河道PFCs暴露及水生植物富集等研究较为缺乏。本研究选择位于北京北部东西贯通的城市河道——清河水体为对象,分析结果表明,清河水体中12种目标PFCs均有检出（总量最高为65.45 ng·L-1）,并以全氟丁烷磺酸盐（perfluorobutane sulfonate,PFBS）为主（最高达45.63 ng·L-1）;6种水生植物（篦齿眼子菜、黑藻、金鱼藻、芦苇、菖蒲及水葱）的富集物质均以全氟辛烷磺酸盐（perfluorooctane sulfonate,PFOS）和全氟辛酸（perfluorooctanoic acid,PFOA）为主,沉水植物中金鱼藻对于PFOS的蓄积效果优于黑藻及篦齿眼子菜,挺水植物中根部PFCs含量高于茎叶,根部PFOA及PFOS含量高于茎叶,但全氟丁酸（perfluorobutanoic acid,PFBA）含量茎叶则高于根部。整体来看,尽管芦苇、菖蒲和水葱3种挺水植物尚不能作为PFCs的超富集植物,但其根部对PFCs均有显著的吸收效果,具有一定的生态修复潜质;沉水植物中金鱼藻是北方自然河道的优势物种,且对PFOS具有显著的富集效应,因此有必要进一步探索其PFCs生物指示和生态修复功能。

英文摘要：

Perfluorinated compounds （PFCs）received extensive attentions and were reported to be widespread in environment in recent years. The existing studies mainly focused on environmental exposure, source identification, and ecological effects related to animal, however, few studies were designed to pay more attention to bioaccumulation of aquatic plants growth in urban river which polluted by domestic discharge. The present study selected the Qing River, which is a typical urban river flowing from west to east of north part of Beijing city. All 12 target PFCs compounds were detected in water with the highest concentration up to 65.45 ng. L-1, and PFBS was the dominant compound（up to 45.63 ng . L-1）. As for 6 species of aquatic plants, PFOS and PFOA were predominantly in Potamogeton pectinatus L., Hydrilla verticillata （Linn. f.） Royle, Ceratophyllum demersum L., Phragmites australis （Cav.） Trin. ex Steud., Scirpus validus Vahl and A corus calamus L. Among three kinds of submerged plants, Ceratophyllum demersum L. had more bioaccumulation of PFOS. Among e- mergent aquatic plants, generally PFCs levels in root tissues were higher than those in stems and leaves; therein PFOA and PFOS concentrations in roots were higher than those of stems and leaves as well, while PFBA with exact contrary. In general, three kinds of emergent aquatic plants couldn＇ t be served as hyper-accumulation plant, but the root tissue has significant absorption effect of PFOS. Ceratophyllum demersum L. has significant effect of bioaccumulation of PFOS, and it is also the dominant species widely spread in natural fiver in north China, thus it could been concerned as a biological indicator and explain its ecological remediation function in the further studies.