• 关键词：全氟辛烷磺酸  全氟辛酸  A²O工艺  污水  污泥

• 基金项目：国家重点基础研究发展计划（973）项目（No.2010CB429003）；环境模拟与污染控制国家重点联合实验室联合基金（No.13L01ESPC）；国家自然科学基金面上项目（No.20877009）

• 张晖
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 史江红
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 东口朋宽
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 薄婷
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 牛军峰
• 北京师范大学环境学院, 水环境模拟国家重点实验室, 北京 100875

• 摘要：为考察全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）在倒置A²O污水处理厂各工艺段的浓度分布规律与去除效率，采用固相萃取（SPE）和高效液相色谱-质谱联用（LC-MS/MS）技术，检测分析了北京市卢沟桥污水处理厂夏季和冬季各工艺段污水和污泥中PFOS和PFOA的浓度.结果显示，PFOS在污水与污泥中的浓度均大于PFOA；进水中PFOS和PFOA的浓度分别为113.9~160.6 ng·L^-1和14.7~68.1 ng·L^-1，出水中的浓度分别为60.1~232.6 ng·L^-1和29.9~71.5 ng·L^-1；PFOS和PFOA在倒置A²O工艺没有得到有效去除.同时发现，PFOS在污泥中的浓度随季节变化较大，且其在污泥中的分配比高于PFOA；PFOS的质量流在工艺流程的各阶段变化较大，而PFOA没有明显的变化和差别.进水中PFOS和PFOA的质量流经过污水处理厂处理后反而升高，有可能是由于前驱物质降解产生.

• Abstract：To investigate the concentrations and removal of perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA) in a reversed A²O treatment process, solid phase extraction (SPE) followed by liquid chromatography tandem mass spectrometry (LC-MS/MS) was used as the pretreatment and analytical method to analyze PFOS and PFOA in wastewater and sludge at Lugouqiao Sewage Treatment Plant in Beijing. Levels of PFOS were higher than those of PFOA in both wastewater and sludge samples. Concentrations of PFOS and PFOA were 113.9~160.6 ng·L^-1 and 14.7~68.1 ng·L^-1 in influent, and 60.1~232.6 ng·L^-1 and 29.9~71.5 ng·L^-1 in effluent, respectively, indicating that the reversed A²O process had poor removals of PFOS and PFOA. The percentage of PFOS partitioned in sludge was higher than that of PFOA, and concentrations of PFOS in sludge varied more between summer and winter than PFOA. PFOS showed larger differences of the mass flow during each process than PFOA. Mass flows of PFOS and PFOA increased after the reversed A²O process, possibly due to the degradation of precursors.

• Key words：perfluorooctanesulfonate (PFOS)  perfluorooctanoate (PFOA)  reversed A²O process  wastewater  sludge

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