| 沱江流域典型及新兴全氟/多氟化合物的污染特征及来源解析 |
| 摘要点击 1887 全文点击 543 投稿时间：2021-12-22 修订日期：2022-01-18 |
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| 中文关键词 全氟/多氟化合物(PFASs) 沱江 污染特征 来源解析 排放通量 |
| 英文关键词 per- and polyfluoroalkylated substances (PFASs) Tuojiang River pollution characteristics source apportionment estimated flux |
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| 中文摘要 |
| 为研究沱江流域表层水中全氟/多氟化合物（PFASs）的污染特征和来源，采用超高效液相色谱-串联质谱（UPLC-MS/MS）分析了沱江48个表层水样中的PFASs.结果表明，沱江流域水体中ρ（ΣPFASs）为12.5~3789 ng·L-1，其中全氟辛烷羧酸（PFOA）为最主要污染组分，ρ（PFOA）为9.97~3764 ng·L-1，占比高达73.6%~99.8%，说明传统PFASs仍是沱江流域主要的PFASs.所涉新兴PFASs检出率最高的为F-53B，检出率达100%，F-53B已在沱江流域被广泛使用.沱江流域浓度最高的新兴PFASs为6：2氟调聚磺酸（6：2 FTS）［nd~27.3 ng·L-1，平均值为（9.12±7.70） ng·L-1］，与国内外其它河流相比，处于较高污染水平.工业园区附近采样点的PFASs污染水平较高，其次为沱江下游的泸州河段，说明氟工业园区排放和人类日常生产活动是造成沱江流域PFASs污染的主要影响因素.最后，通过估算得出，沱江流域水相向长江排放的PFASs通量为353 kg·a-1，其中排放通量最高组分为PFOA （348 kg·a-1），可为沱江流域PFASs管控提供基础数据. |
| 英文摘要 |
| Forty-eight surface water samples were analyzed using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) in order to study the pollution characteristics and source apportionment of per- and polyfluoroalkylated substances (PFASs) in the Tuojiang River. The results showed that ΣPFASs in the Tuojiang River ranged from 12.5-3789 ng·L-1, and perfluorooctanoic acid (PFOA) was the predominant PFAS, with a concentration of 9.97-3764 ng·L-1 (73.6%-99.8%), suggesting that legacy PFASs were still the dominant PFASs in the Tuojiang River. The most frequently detected emerging PFASs was 9-chlorohexadecafluoro-3-oxanonane-1-sulfonate (F-53B), with a detection frequency of 100%, suggesting the wide use of F-53B in the Tuojiang River. Sodium 1H, 1H, 2H, 2H-perfluorooctane sulfonate (6:2 FTS) displayed the highest concentration among all emerging PFASs[nd-27.3 ng·L-1, mean:(9.12±7.70) ng·L-1], and the concentrations were at the higher levels compared to those in other rivers around the world. In addition, ΣPFASs showed the highest concentrations of ΣPFASs at the fluorochemical manufacturing park (FMP), followed by those in the Luzhou section (in the lower reaches of the Tuojiang River), indicating that the emission of FMP and human daily production activities were the main influencing factors of PFASs pollution in the Tuojiang River. The estimated flux of PFASs from the Tuojiang River to the Yangtze River was 353 kg·a-1, and PFOA displayed the greatest mass loading (348 kg·a-1), which could provide the basic data for controlling PFASs in the Tuojiang River. |
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