| 石家庄道路灰尘中全氟/多氟化合物及其新型替代品的污染特征及健康风险评估 |
| 摘要点击 1368 全文点击 465 投稿时间：2022-05-05 修订日期：2022-06-22 |
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| 中文关键词 全氟/多氟化合物(PFASs) 新型替代品 道路灰尘 分布特征 风险评估 |
| 英文关键词 per- and polyfluoroalkyl substances(PFASs) emerging alternatives road dust distribution risk assessment |
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| 中文摘要 |
| 为探究石家庄市道路灰尘中全氟/多氟化合物（PFASs）的污染特征，利用高效液相色谱-串联质谱法（HPLC-MS/MS）分析主干和次干道路灰尘样品（部分采集于污水处理厂和消防站附近）中包括两类新型替代品在内的22种PFASs.结果表明，PFASs在石家庄道路灰尘中普遍存在，特别是新型替代品——六氟环氧丙烷二聚酸（HFPO-DA）的检出属国内首次.ΣPFASs含量范围为2.62~137.65 ng ·g-1，全氟辛酸（PFOA）为主要组分，其次为全氟丁酸（PFBA）、HFPO-DA和全氟辛基磺酸（PFOS）.空间分布上，西北方向PFASs含量水平最高，东南方向最低.污水处理厂和消防站附近道路灰尘中PFASs组成存在明显不同，特别是新型替代品的检出类型.健康风险评估结果显示，道路灰尘摄入对于人体暴露PFASs和其新型替代品的风险相对较低.经口、呼吸道和皮肤接触3种途径中，经口摄入是目标化合物进入人体的主要途径.在同一暴露途径下，儿童的暴露量高于成人. |
| 英文摘要 |
| Per- and polyfluoroalkyl substances (PFASs, n=22), including emerging alternatives, in dust samples were analyzed using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) to study their pollution characteristics. These samples were collected from main and minor roads in Shijiazhuang. Some of the roads were located near sewage treatment plants and fire stations. The results showed that PFASs were ubiquitous in the road dust of Shijiazhuang; in particular, hexafluoropropylene oxide dimer acid (HFPO-DA), an alternative, was measured for the first time in China. The total concentrations of PFASs ranged from 2.62 to 137.65 ng·g-1. Perfluorooctanoic acid (PFOA) was the dominant PFAS, followed by perfluorobutanoic acid (PFBA), HFPO-DA, and perfluorooctane sulfonic acid (PFOS). The highest and lowest levels of PFASs were observed in the northwest and southeast regions of Shijiazhuang, respectively. The compositions of PFASs were obviously different in road dust near sewage treatment plants and fire stations, especially for the types of emerging alternatives. Health risk assessment indicated that road dust intake had a low risk of human exposure to PFASs and emerging alternatives. Among the three routes (ingestion intake, inhalation intake, and dermal contact), ingestion intake was the main route for PFASs and emerging alternatives in road dust to enter the human body. Under the same exposure route, the exposure dose of children was higher than that of adults. |
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