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Chemosphere. 2015 May;127:64-9. doi: 10.1016/j.chemosphere.2014.12.075. Epub 2015 Feb 2.

Characteristics of polycyclic aromatic hydrocarbons in agricultural soils at a typical coke production base in Shanxi, China.

Author information

1
College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China. Electronic address: yhduanpku@sina.com.
2
Jiangsu Provincial Key Laboratory of Environmental Engineering, Jiangsu Academy of Environmental Sciences, Nanjing 210036, China.
3
Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
4
College of Resources and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China.

Abstract

There is wide concern about polycyclic aromatic hydrocarbons (PAHs) because of their carcinogenic and mutagenic potential. The coking industry is an important source of PAHs. In this study, 36 arable soil samples, a sensitive medium from the perspective of food safety and health, were collected from one of the largest coke production bases in China. The concentration of total 21 PAHs ranged from 294 to 1665 ng g(-1), with a mean of 822±355 ng g(-1). Approximately 60% of the soil samples were heavily polluted with the level higher than 600 ng g(-1). Particularly high abundances of high molecular weight PAHs were found, and the calculated BaPeq was as high as 54.3 ng g(-1). Soil PAH levels were positively correlated with soil organic matter content. The soil PAHs were from complex mixture sources, and high-temperature pyrogenic sources were most likely responsible for the heavy PAH contamination. Effective control strategies and probable remediation approaches should be proposed to improve soil quality.

KEYWORDS:

Arable soil; Coke production base; PAHs; Risk assessment; Source identification

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