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Estimating dry deposition and gas/particle partition coefficients of neutral poly-/perfluoroalkyl substances in northern German coast

Author:
Wang, Zhen, Xie, Zhiyong, Möller, Axel, Mi, Wenying, Wolschke, Hendrik, Ebinghaus, Ralf
Source:
Environmental pollution 2015 v.202 pp. 120-125
ISSN:
0269-7491
Subject:
Gibbs free energy, coasts, dry deposition, marine ecosystems, models, partition coefficients, wind speed
Abstract:
Dry deposition fluxes of 12 neutral poly-/perfluoroalkyl substances (PFASs) were estimated at Büsum located in northern German coast, and their gas/particle partition coefficients were predicted by employing the polyparameter linear free energy relationships (PP-LFERs). The gas deposition flux, particle deposition flux and total (gas + particle) flux of the 12 PFASs during sampling periods were 1088 ± 611, 189 ± 75 and 1277 ± 627 pg/(m2 d), respectively. The gas deposition of PFASs played a key role during deposition to marine ecosystem. Sensitivity analysis showed that wind speed was the most sensitive parameter for gas deposition fluxes. Good agreements (within 1 log unit) were observed between the measured gas/particle partitioning data of PFASs and the predicted partition coefficients using PP-LFERs, indicating the model can reliably predict the gas/particle partitioning behaviors of atmospheric neutral PFASs.
Agid:
5460602