Pedosphere 27(1): 17--26, 2017
ISSN 1002-0160/CN 32-1315/P
©2017 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Characteristics and source identification of polycyclic aromatic hydrocarbons (PAHs) in urban soils: A review
WANG Chun-Hui, WU Shao-Hua, ZHOU Sheng-Lu, SHI Ya-Xing and SONG Jing
School of Geographic and Oceanographic Sciences, Nanjing University, 163 Xianlin Road, Nanjing 210023 (China)
ABSTRACT
      Polycyclic aromatic hydrocarbons (PAHs) are mainly produced by combustion processes and consist of a number of toxic compounds. They are always emitted as a mixture and have become a major type of pollutants in urban areas. The degree of soil contamination by PAHs is of special concern in areas immediately in proximity to cities with heavy traffic, factories, older buildings, and infrastructure. The accumulation of soil PAHs is also affected by non-anthropogenic factors, such as climate, vegetation, and soil property. This paper reviews three typical source identification techniques, including diagnostic ratios, positive matrix factorization, and principle components analysis. The advantages or disadvantages of these techniques are analyzed. It is recommended that multiple identification techniques be used to determine the sources in order to minimize the weaknesses inherent in each method and thereby to strengthen the conclusions for PAH source identification.
Key Words:  anthropogenic factors, diagnostic ratios, organic pollutants, positive matrix factorization, principle components analysis, soil contamination, soil property, urban environment
Citation: Wang, C. H., Wu, S. H., Zhou, S. L., Shi, Y. X. and Song, J. 2017. Characteristics and source identification of polycyclic aromatic hydrocarbons (PAHs) in urban soils: A review. Pedosphere. 27(1): 17-26.
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