南方某氟化学工业园周围环境中全氟化合物的分布研究

Distribution and profile of perfluorinated compounds in the environment around a fluorine chemistry industrial park in South China

南方某氟化学工业园四氟乙烯(TFE)和聚四氟乙烯(PTFE)的年生产量均达万吨以上,大量氟化学品的生产可能对周围环境产生一定的危害.本文以该氟化学工业园为研究对象,对其周边地区的水体、沉积物中的11种全氟化合物(PFASs)含量进行监测,并首次对植物树叶和树皮中PFASs含量进行测定.结果表明,与树皮相比,树叶对环境中PFASs具有更强的富集能力;水、沉积物、树叶和树皮中最主要的PFASs均是全氟辛酸(PFOA).地表水中PFOA浓度均值为675.9ng·L-1,最高浓度达1503ng·L-1;沉积物中PFOA浓度均值为1.11ng·g-1(干重,下同),最高浓度为2.58ng·g-1;树叶和树皮中的PFOA浓度均值分别为22.18和15.43ng·g-1,最高浓度分别为168.6和89.67ng·g-1.

The target of this study is a large-scale fluorine chemistry industrial park located in south China with the annual production of TFE and PTFE around ten thousands of tons. Along with the industrial emissions, many fluorine products are discharged into the surrounding environment. The occurrence of these pertluoroalkyl and polyfluoroalkyl substances （PFASs） may pose harmful effects to the surrounding environment, even to human health. Water, sediment, leaf and bark samples were collected around the park and 11 PFASs were measured. The results indicate that PFASs are more prone to concentrate in leaf than in bark. The major PFASs in water, sediment, leaf and bark samples were perfluorooctonal acid （PFOA）. The average concentration and highest concentration of PFOA in water samples were 675.9 and 1503 ng·g^-1. The average contents of PFOA in sediment, leaf and bark samples was 1.11, 22. 18 and 15.43 ng·g^-1（ dw）, respectively. The highest level of PFOA in these matrices was 2.58, 168.6 and 89.67 ng·g^-1（dw） , respectively.