Environmental Exposure Level And Plant Enrichment Characteristics Of Perfluorinated Compounds In Typical Urban

Pollution and treatment of urban rivers had gained wide attentions. Current studies mainly included eutrophication pollution, heavy metals and other aspects, but studies on new persistent organic pollutants(POPs) were very scarce. Perfluorinated compounds(PFCs) received extensive concerns. 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.This paper selected the Qing River in Beijing, which receives reclaimed water as main source. The results were as follows:1) PFBS was the predominant PFC in the Qing River, and seasonal change of PFCs was mainly affected by PFBS. Reclaimed water put obvious effects on pollution of PFCs and also caused that concentrations of PFCs in river water were higher than those in drinking water source.2) 12 PFCs were all detected in environmental samples. PFOA and PFOS were predominant in 8 plants, namely Potamogeton pectinatus L., Hydrilla verticillata(Linn.f.) Royle, Ceratophyllum demersum L., Phragmites australis(Cav.) Trin. ex Steud.,Scirpus validus Vahl, Acorus calamus L.,Humulus scandens(Lour.) Merr. And Parthenocissus quinquefolia(L.) Planch. Highly detected PFBS in environment did not extensively accumulated in plants. Drainage of reclaimed water in middle stream was the main pollution source and had great influence in pollution of PFCs.3) Ceratophyllum demersum L.as submerged plant had obvious accumulative function for PFOS. Based on cultivation aim, bioaccumulation and transfer coefficients,these three kinds emergent plants, namely Phragmites australis(Cav.) Trin. ex Steud.,Scirpus validus Vahl, Acorus calamus L., were not suitable to remove PFCs.4) Humulus scandens(Lour.) Merr.And Parthenocissus quinquefolia(L.) Planch.had great effect on accumulation and transformation of PFCs. It is very meaningful to study their function of biological indicator and phytoremediation.