| Title: | "Polycyclic aromatic hydrocarbons in soils and lichen from the western Tibetan Plateau: Concentration profiles, distribution and its influencing factors" |
| Address: | "State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: rqyang@rcees.ac.cn. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China" |
| DOI: | 10.1016/j.ecoenv.2018.01.009 |
| ISSN/ISBN: | 1090-2414 (Electronic) 0147-6513 (Linking) |
| Abstract: | "The Tibetan Plateau (TP) is a huge area and rarely affected by human activity, and is regarded as one of the most remote regions on the earth. Many studies about the long-range atmospheric transport (LRAT) of semi-volatile organic compounds (SVOCs) were conducted in southern and central TP. However, there are very limited studies focused on PAHs in the western TP and the concentrations profiles, distribution and its controlling factors in this area remains unclear. Thus, to explore this knowledge gap, 37 surface soil samples and 23 lichen samples were collected and analyzed for PAHs. The total concentration of 16 US EPA's priority PAHs ( summation operator(16)PAHs) in western TP ranges 14.4-59.5ng/g and 38.0-133ng/g dry weight (dw) with a mean value of 30.8 and 84.6ng/g dw in soil and lichen, respectively, which is lower than the concentrations in most remote areas worldwide. In the western TP, low molecular weight PAHs (2-3 rings) are dominant (occupied 77.4% and 87.9% on average in soil and lichen, respectively), implying a significant contribution of LRAT in this area. The significant linear correlations (R(2) = 0.372-0.627, p < 0.05) between longitude and soil concentration suggest a strong impact of the westerly wind on the distribution of PAHs in soil. In addition, the concentration ratio of lichen/soil (L/S) was found to linearly increase with the increasing log K(OA) of individual PAH, suggesting lichen has a strong ability in filtering more lipophilic airborne pollutants in western TP" |
| Keywords: | China Environmental Monitoring/*methods Humans Lichens/*chemistry Polycyclic Aromatic Hydrocarbons/*analysis Soil/*chemistry Soil Pollutants/*analysis Tibet Volatile Organic Compounds/*analysis Alpine region Long-range atmospheric transport (LRAT) Mountai; |
| Notes: | "MedlineZhou, Ruichen Yang, Ruiqiang Jing, Chuanyong eng Netherlands 2018/01/15 Ecotoxicol Environ Saf. 2018 May 15; 152:151-158. doi: 10.1016/j.ecoenv.2018.01.009. Epub 2018 Jan 10" |
