The Atmospheric Pollution Characteristics and Health Risk Assessment of Perfluorohexane Sulfonic Acid in Beijing

Perfluorohexane sulfonic acid (PFHxS), one of the substitutes for perfluorooctane (PFOS), has been widely discussed around world. In this study, atmospheric concentrations PFHxS in Beijing summer and autumn 2021 were monitored, gas–particle partitioning wet dry deposition characteristics analyzed. The results show that average total 1.61 pg/m3 1.41 pg/m3, respectively. particulate fraction φ was about 48% during research period, there a significant positive correlation between air temperatures. linear fitting relationship logKp(gas–particle partition coefficient) logPL (compound vapor pressure) showed absorption molecule matter dominated process partitioning. flux largest July smallest October, with values 55.2 23.7 ng/m2, During study atmosphere had no obvious health impacts on humans. However, their extensive use, possible harmful effects children should be continuously investigated.