| Title: | Contributions of deposited particles to pine needle polycyclic aromatic hydrocarbons |
| Author(s): | Yang P; Chen J; Wang Z; Qiao X; Cai X; Tian F; Ge L; |
| Address: | "Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, Dalian University of Technology, Dalian, 116024, China" |
| ISSN/ISBN: | 1464-0325 (Print) 1464-0325 (Linking) |
| Abstract: | "The contributions of deposited particles (P) to polycyclic aromatic hydrocarbon (PAH) levels in pine (Cedrus deodar) needles sampled from the Dalian region were evaluated by washing off the particles from pine needle surfaces. P values ranged from 4.4 +/- 2.2% for fluorene to 69.9 +/- 4.0% for indeno(1,2,3-cd)pyrene, and positively correlated with the logarithm of octanol-air partition coefficients (log K OA) of each PAH significantly. P and the total levels of 14 PAHs under study ( summation PAHs), that ranged from 490 to 3241 ng g(-1) dw (dry weight) with median value of 1521 ng g(-1) dw, were high for traffic areas, and low for residential or park areas, implying the significant contributions of PAHs in both gas and particle phases emitted by vehicles. However, PAH profiles in pine needles were not significantly altered by the washing, due to the low fractions (2-5%) of the 5- and 6-ring PAHs in summation PAHs. The high wind speed and frequently alternating wind directions in the Dalian spring could quicken the depuration processes of pine needle PAHs. Thus, the local meteorological conditions and source variations should be taken into account when using pine needles to implicate seasonal variations of atmospheric semi-volatile organic compounds" |
| Keywords: | "Air Pollutants/*analysis Chromatography, High Pressure Liquid Microscopy, Electron, Scanning Pinus/*chemistry Plant Leaves/*chemistry Polycyclic Compounds/*analysis Quality Control Reference Standards Reproducibility of Results Seasons Sensitivity and Spe;" |
| Notes: | "MedlineYang, Ping Chen, Jingwen Wang, Zhen Qiao, Xianliang Cai, Xiyun Tian, Fulin Ge, Linke eng Research Support, Non-U.S. Gov't England 2007/10/31 J Environ Monit. 2007 Nov; 9(11):1248-53. doi: 10.1039/b708508g. Epub 2007 Aug 10" |
