Shi Bingfang, Wu Qilin, Ouyang Huixiang, Liu Xixing, Zhang Jinlei, Zuo Weiyuan
Department of Chemistry and Life Sciences, Baise University, 21 2nd Zhongshan Road, Baise City, Guangxi, 533000, China,
Environ Monit Assess. 2015 May;187(5):232. doi: 10.1007/s10661-015-4465-y. Epub 2015 Apr 8.
To estimate the distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in the soils of Baise, in southwest China, soil sampling sites were selected from industry, traffic, rubbish, gas station, residential, and suburban areas for analysis of PAHs. The average concentrations of ∑16PAHs in the present study varied significantly, depending on the sampling location, and ranged from 16.8 to 6,437.0 μg/kg (dry weight basis), with a mean value of 565.8 μg/kg. PAH concentrations decreased significantly along the industry-traffic-rubbish-gas station-residential-suburban transect. The PAH profiles in the surface soil of the different areas imply that either source proximity to the sampling sites, or transport and deposition effects influenced PAH distributions. Two diagnostic ratios were selected and used to apportion PAH sources in the surface soil, and bivariate plots show general trends of covariation. Principal component analysis and multivariate linear regression were used to determine the primary sources and their contributions of PAHs to the soils. The model showed that factors 1 (coal and wood combustion) and 2 (petroleum combustion) contributed over 52.1 and 32.5% of the total source of soil PAHs, respectively. The remaining 15.4% came from evaporative and uncombusted petroleum.
为估算中国西南部百色市土壤中多环芳烃（PAHs）的分布及来源，从工业、交通、垃圾、加油站、居民区和郊区选取土壤采样点，对PAHs进行分析。本研究中∑16PAHs的平均浓度因采样地点而异，变化显著，范围为16.8至6437.0μg/kg（干重），平均值为565.8μg/kg。PAH浓度沿工业-交通-垃圾-加油站-居民区-郊区样带显著降低。不同区域表层土壤中的PAH分布特征表明，PAH分布受采样点附近源或传输与沉降效应的影响。选取两个诊断比值用于表层土壤PAH源的解析，双变量图显示了共变的总体趋势。采用主成分分析和多元线性回归确定PAHs在土壤中的主要来源及其贡献。模型显示，因子1（煤和木材燃烧）和因子2（石油燃烧）分别占土壤PAHs总来源的52.1%和32.5%以上。其余15.4%来自蒸发和未燃烧的石油。
