期刊
WATER RESEARCH
卷 150, 期 -, 页码 261-270出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2018.11.053
关键词
River; Biofilm; Adsorption; Phthalate esters; Bisphenols
资金
- National Science Foundation of China [51709079, 91547105]
- Foundation of Innovative Research Groups of the National Science Foundation of China [51421006]
- Jiangsu Natural Science Foundation of China [BK20170883]
- China Postdoctoral Science Foundation [2017M610293]
- Open Research Fund of the Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes [2016B20414]
- Fundamental Research Funds for the Central Universities
River biofilms play fundamental roles in shaping the architecture of aquatic systems. Sorption to biofilms was thought to be a crucial mechanism controlling the fate and transport of trace emerging contaminants. This study focused on the role of in situ colonized river biofilms in the early fate of phthalate esters (PAEs) and bisphenols (BPs) at trace concentrations in a representative urban river. PAEs and BPs were readily sorbed to biofilms with uptakes of 38.2-162.5 mu g/g for PAEs and 1787.7-4425.6 mu g/g for BPs, respectively. The total mass and characteristics of the colonized biofilms varied in response to seasons and water qualities. The biofllm colonized in the downstream of a wastewater treatment plant exhibited the highest sorption capacity among the tested sites, possibly attributed to the higher organic contents of biofilms owing to the elevated availability of nutrients. Correlation analysis indicates that certain water qualities, e.g., TN and NH3-N, and biofllm properties, e.g., organic and polysaccharide fractions could be selected to predict the sorption capacities of river biofilms. Hydrophobic partitioning into organic matter appears to be the dominant sorption mechanism and biofllm polysaccharides were probably responsible for the adhesion of tested compounds. The contaminant partitioning into biofilm and sediment at mass/volume ratios typical for small rivers suggests that the biofilm could serve as an important sorbing matrix for the trace organic contaminants as compared to the sediments. Our work yields new insights into the early uptake and accumulation of trace plasticizers by natural biofilms, which is of significance in understanding the subsequent transport of trace organic contaminants in fluvial systems. (C) 2018 Elsevier Ltd. All rights reserved.
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