Perfluorinated compounds in sediments from the Daliao River system of northeast China

Perfluoroalkyl acids (PFAAs) in riverine and coastal sediments of Laizhou Bay, North China

“…Except for the extremely highlevel PFOA sites, PFOA levels at other sampling sites (b MDL to 1.81 ng/g dw) were lower than those of the Haihe River (0.9 ng/g to 7.3 ng/g dw) and Dagu Drainage River (0.27 ng/g to 1.7 ng/g dw) and were quite comparable with the concentrations observed in the river and coast sediments from other locations in China (0.08 ng/g to 1.7 ng/g dw in Hun River, 0.20 ng/g to 0.64 ng/g dw in Yangtze River and 0.09 ng/g to 0.29 ng/g dw in Zhujiang River) (Bao et al, 2009(Bao et al, , 2010b, Japan (0.45 ng/g to 1.1 ng/g dw) (Nakata et al, 2006;Zushi et al, 2010) and the USA (nd to 0.625 ng/g dw) (Senthil et al, 2009). PFOS levels in sediments from the Laizhou Bay and adjacent rivers in this study (0.02 ng/g to 1.6 ng/g) were lower than the levels reported in some urban rivers in China, namely, the Haihe River (1.8 ng/g to 7.3 ng/g dw), the Dagu Drainage River (0.09 ng/g to 2.3 ng/g dw) ) and the Zhujiang River (ng to 3.1 ng/g dw) (Bao et al, 2010b), but were higher than the levels reported in Taihu Lake (0.06 ng/g to 0.31 ng/g dw) (Yang et al, 2011) (Table 1).…”

“…Previous studies had suggested levels of tens to hundreds of ng/g for PFOA and PFOS in riverine and coastal sediments (Table 1). The highest concentrations of PFOS and PFOA in riverine sediments in China were detected in the Yangtze River estuary (536.7 ng/g dw) and in the Xi River, Liaoning Province (48 ng/g dw), respectively (Bao et al, 2009(Bao et al, , 2010a. High levels of these substances had been attributed to rapid urbanisation and the development of the fluorochemical industry.…”

Perfluorinated Compounds in the Asian Atmosphere

“…So far most ambient measurements of PFCs have been made in North America and Europe. 3,4,15À17 However, there is particular interest in Asia at the present time, because manufacture and use of PFCs continues there 18 and LRAT can be important regionally and as a source to the Arctic and Pacific Ocean. 3,4 Ambient measurements can be made using active air samplers or passive sampling techniques.…”

Exploring the fate, transport and risk of Perfluorooctane Sulfonate (PFOS) in a coastal region of China using a multimedia model

“…The median modeled PFOS concentrations in fresh water, fresh water sediment and soil were 7.20 ng/L, 0.39 ng/g and 0.21 ng/g, respectively, in ES2 for the whole region, while the maximum concentrations were 47.10 ng/L, 4.98 ng/g and 2.49 ng/g. Measured concentrations of PFOS in samples from this region collected around 2010 were collated from literature sources (Bao et al, 2009;Li et al, 2011;Lu et al, 2012;Pan et al, 2011;Shi et al, 2012;Sun et al, 2011;Wang et al, 2011;Yang et al, 2011;Zhao et al, 2013). These data were compared with predicted concentrations in all emission scenarios as a preliminary model evaluation (Fig.…”

“…Concentrations of PFOS in air, vegetation, soil, fresh water, fresh water sediment and coastal water were derived from the modified model under the steady-state assumption. Measured concentrations of PFOS in the Bohai coastal region around the year of 2010 were collected from the literature (Bao et al, 2009;Li et al, 2011;Lu et al, 2012;Pan et al, 2011;Shi et al, 2012;Sun et al, 2011;Wang et al, 2012aWang et al, , 2012bWang et al, 2011;Yang et al, 2011;Zhao et al, 2013). The reliability of model predictions was evaluated by comparison with available measured data.…”