【摘要】 采用超高效液相色谱串联质谱分析了四川省岷江流域水体中13种全氟化合物(PFASs)的浓度水平.结果表明,岷江流域水相中PFASs的浓度为1.54～30.2ng/L,平均值为(11.2±8.0)ng/L,浓度最高点出现在乐山下游(30.2ng/L).其中,岷江流域水相中最主要的PFASs为全氟丁烷羧酸(PFBA),浓度为0.16～28.4ng/L,占总全氟化合物的54.0%～94.1%(都江堰除外).岷江流域沉积物中PFASs浓度最高点在宜宾三江(岷江、金沙江和长江)汇合处(47.5ng/g dw),最低值在都江堰(0.334ng/gdw).其中,主要的PFASs是全氟己烷羧酸(PFHxA)(4.44%～66.9%)和全氟辛烷羧酸(PFOA)(1.52%～77.5%).岷江流域PFASs的年排放通量为1.443t/a,排放通量最高的为PFBA(1.037t/a),占总排放通量的71.9%.更多还原

【Abstract】 Thirteen kinds of perfluoroalkyl and polyfluoroalkyl substances(PFASs) were analyzed in water and sediment samples collected from Minjiang River by ultra-performance liquid chromatography tandem mass spectrometry(UPLC-MS/MS). PFASs in water phase were in the range of 1.54～30.2 ng/L, with mean value of(11.2±8.0) ng/L, and the greatest value appeared at the down stream of Leshan city(30.2 ng/L). In addition, perfluorobutanoic acid(PFBA) was the predominant PFASs in water phase, with the concentrations of 0.16～28.4 ng/L and concentration profile of 54.0%～94.1%(except Dujiang yian). PFAS concentrations in sediment displayed the highest level(47.5 ng/g dw) at Yibin city, near the confluence of Minjiang River, Jinsha River and Yangtze River, while the lowest one was at Dujiang Yan(0.334 ng/g dw). Furthermore, the main PFASs in sediment were perfluorohexanoate(PFHxA)(4.44%～66.9%) and perfluroroocantanoic acid(PFOA)(1.52%～77.5%). Estimated flux of PFASs in Minjiang River was 1.443 tons/year, and PFBA displayed the greatest mass loading(1.037 tons/year), accounting for 71.9% of total flux.更多还原