Characteristics and Source Identification of Polycyclic Aromatic Hydrocarbons (PAHs) in Urban Soils: A Review

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• 作者：Chunhui WANG ; Shaohua WU ; Shenglu ZHOU ; ^{zhousl@nju.edu.cn} ; Yaxing SHI ; Jing SONG
• 关键词：anthropogenic factors ; diagnostic ratios ; organic pollutants ; positive matrix factorization ; principle components analysis ; soil contamination ; soil property ; urban environment
• 刊名：Pedosphere
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：27
• 期：1
• 页码：17-26
• 全文大小：171 K
• 卷排序：27

文摘

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.