Fluorochemical mass flows in a municipal wastewater treatment facility
Fluorochemical mass flows in a municipal wastewater treatment facility
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DOI：
10.1021/es061025m
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发表时间：
2006-12-01
影响因子：
11.4
通讯作者：
Field, Jennifer A.
中科院分区：
文献类型：
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作者：
Schultz, Melissa M.;Higgins, Christopher P.;Field, Jennifer A.
含氟化学品具有广泛的应用，并通过生活污水排放到城市污水处理厂。在一个全规模的城市污水处理厂进行了一项实地研究，以确定选定的氟化学品的质量流量。采集了10d内原进水、一级出水、滴滤池出水、二级出水、最终出水以及一级污泥、浓缩污泥、活性污泥和厌氧消化污泥的流动比例、24 h样品，并用高效电喷雾串联质谱仪进行了分析。在滴滤和初澄清过程中，全氟己烷磺酸盐和全氟己酸盐的质量流量显著减少，而活性污泥处理则减少了全氟己酸的质量流量。废水处理后，6：2氟调聚体磺酸盐和全氟辛酸酯的质量流量不变，表明常规废水处理不能有效去除这些化合物。滴滤和活性污泥处理使全氟辛烷和全氟十烷磺酸盐的质量流量净增加。在活性污泥处理过程中，全氟烷基磺酰胺和全氟农酸盐的质量流量也有所增加，这归因于前体分子的降解。
Fluorochemicals have widespread applications and are released into municipal wastewater treatment plants via domestic wastewater. A field study was conducted at a full-scale municipal wastewater treatment plant to determine the mass flows of selected fluorochemicals. Flowproportional, 24 h samples of raw influent, primary effluent, trickling filter effluent, secondary effluent, and final effluent and grab samples of primary, thickened, activated, and anaerobically digested sludge were collected over 10 days and analyzed by liquid chromatography electrospray-ionization tandem mass spectrometry. Significant decreases in the mass flows of perfluorohexane sulfonate and perfluorodecanoate occurred during trickling filtration and primary clarification, while activated sludge treatment decreased the mass flow of perfluorohexanoate. Mass flows of the 6: 2 fluorotelomer sulfonate and perfluorooctanoate were unchanged as a result of wastewater treatment, which indicates that conventional wastewater treatment is not effective for removal of these compounds. A net increase in the mass flows for perfluorooctane and perfluorodecane sulfonates occurred from trickling filtration and activated sludge treatment. Mass flows for perfluoroalkylsulfonamides and perfluorononanoate also increased during activated sludge treatment and are attributed to degradation of precursor molecules.