中国城市垃圾填埋场渗滤液中的全氟烷基酸：在渗滤液处理过程中的存在、归宿及对地下水的潜在影响。
Perfluoroalkyl acids in municipal landfill leachates from China: Occurrence, fate during leachate treatment and potential impact on groundwater.
机构信息
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Department of Applied Environmental Science (ITM), Stockholm University, Svante Arrhenius väg 8, Stockholm, Sweden.
出版信息
Sci Total Environ. 2015 Aug 15;524-525:23-31. doi: 10.1016/j.scitotenv.2015.03.111. Epub 2015 Apr 15.
Raw and treated landfill leachate samples were collected from 5 municipal landfill sites in China to measure the concentrations and contamination profile of perfluoroalkyl acids (PFAAs) in leachate during different steps of treatment. The total concentration of PFAAs (∑PFAAs) ranged from 7280 to 292,000 ng L(-1) in raw leachate and from 98.4 to 282,000 ng L(-1) in treated leachate. The dominant compounds measured were PFOA (mean contribution 28.8% and 36.8% in raw and treated leachate, respectively) and PFBS (26.1% and 40.8% in raw and treated leachate, respectively). A calculation of mass flows during the leachate treatment processes showed that the fate of individual PFAAs was substance and treatment-specific. The Chinese national leakage of ∑PFAAs to groundwater from landfill leachate was estimated to be 3110 kg year(-1), which is a significant environmental release that is potentially threatening the sustainable use of groundwater as a drinking water source.
采集了中国 5 个城市垃圾填埋场的原始和处理后的垃圾渗滤液样品，以测量渗滤液在不同处理阶段中全氟烷基酸（PFAAs）的浓度和污染状况。原始渗滤液中 PFAAs（∑PFAAs）的总浓度范围为 7280 至 292000ng/L，处理后渗滤液中 PFAAs（∑PFAAs）的浓度范围为 98.4 至 282000ng/L。测量到的主要化合物是 PFOA（在原始和处理后的渗滤液中分别占平均贡献的 28.8%和 36.8%）和 PFBS（在原始和处理后的渗滤液中分别占平均贡献的 26.1%和 40.8%）。在渗滤液处理过程中物质流动的计算表明，个别 PFAAs 的命运因物质和处理方式而异。估计中国填埋场渗滤液中∑PFAAs 向地下水的国家泄漏量为 3110kg/年，这是一个重大的环境释放，可能对地下水作为饮用水源的可持续利用构成威胁。
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