title: Polychlorinated naphthalenes (PCNs) in the surface soils of the Pearl River Delta, South China: distribution, sources, and air-soil exchange.
abstract: Polychlorinated naphthalenes (PCNs) are now under review by the Stockholm Convention as a candidate for POPs for their persistence, toxicity, bioaccumulation, and long-range atmospheric transport. Data regarding PCN levels and their environmental fate are sparse in China. The PCN concentration and distribution in soils of the Pearl River Delta were reported, and the average total concentration was 59.9 ± 86.7 pg/g. Tri-CNs was the dominant homologue group, and CN 24 was the most abundant congener. A gradient of PCN levels between more and less developed areas was observed. Based on fugacity fraction results, CN 51 is proposed as a possible source marker for specific combustion emissions. Air-soil exchange of PCNs was estimated by calculating the soil and air fugacity. Fugacity fraction values indicated that tri- to penta-CNs were closer to equilibrium in winter and toward net volatilization in summer, while hexa-CNs experienced net air-to-soil transfer in both seasons.
authors: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors: Yan
authors: Y
authors: Wang
authors: Zhineng
authors: Z
authors: Cheng
authors: Jun
authors: J
authors: Li
authors: Chunling
authors: C
authors: Luo
authors: Yue
authors: Y
authors: Xu
authors: Qilu
authors: Q
authors: Li
authors: Xiang
authors: X
authors: Liu
authors: Gan
authors: G
authors: Zhang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D009281:Naphthalenes / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis*; D014835:Volatilization
chemical_list: D000393:Air Pollutants; D009281:Naphthalenes; D012989:Soil Pollutants