Perfluorinated compounds in the atmosphere of Shenzhen, China

High volume air samples taken to 13 sampling sites that were chosen in 6 districts of Shenzhen, China from September to November, 2011 were analyzed for 11 perfluorinated compounds (PFCs). A set of ionic nonvolatile PFCs including two perfluoroalkyl sulfonic acids (PFSAs, C6 and C8) and perfluoroalkyl carboxylic acids (PFCAs, C4-12) were collected on polyurethane foam – based passive air samplers (PUF – PASs) and determined using high performance liquid chromatography-negative electrospray ionization-tandem mass spectrometry (HPLC/ESI-MS/MS). PFCs were detected in all air samples, even in the background sample, indicating the widespread contaminations of PFCs in the atmosphere of Shenzhen. Total PFC concentrations (∑ PFCs) of the samples ranged from 3.4 to 34 pg·m-3 with an average of 15 pg·m-3. ∑ PFCs decreased from west to east of Shenzhen, which was related to industrial distribution, population density, and environmental climate (Fig. 1).

Fig. 1 Spatial distribution of PFCs in Shenzhen atmosphere (pg·m-3)

Furthermore, Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) as the two most abundant PFCs averagely accounted for 35% and 22% of ∑ PFCs, respectively. On the base of this data set, the principal component analysis – multiple linear regression model (PCA – MLR) to analyze the sources of atmospheric PFCs, correlation analysis to explore the correlation between ∑ PFCs and levels of atmospheric particulates and mathematical model to calculate environmental health risk assessment were used. This study gives a new method to calculate the sampling rate of PUF – PAS in sampling fine particles for the low volatile POPs.

Zhang H
College of Physics Science and Technology, Shenzhen University, Shenzhen, China

 

Publication

Perfluorinated compounds (PFCs) in the atmosphere of Shenzhen, China: Spatial distribution, sources and health risk assessment.
Liu B, Zhang H, Yao D, Li J, Xie L, Wang X, Wang Y, Liu G, Yang B
Chemosphere. 2015 Nov

FacebooktwitterlinkedinmailFacebooktwitterlinkedinmail

Leave a Reply