Distribution and sources of polycyclic aromatic hydrocarbons in soils from Shengli Oil Field, China

The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs), which are on the United States Environmental Protection Agency (US EPA) priority pollutant list, were studied in ten different soil samples from Shengli Oil Field, China. The total PAHs concentrations in the sampled soils attained 121...

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Published inSoil and water research Vol. 13; no. 2; pp. 74 - 82
Main Authors KUANG, Shaoping, SU, Yaqing, ZHANG, Jinghuan, SONG, Zhen, WANG, Huihui, YU, Wenjuan
Format Journal Article
LanguageEnglish
Published Prague Czech Academy of Agricultural Sciences (CAAS) 01.01.2018
Czech Academy of Agricultural Sciences
Subjects
Benzene
Benzo(a)pyrene
Combustion
Contamination
content
Environmental protection
Fluoranthene
Fluorine
Naphthalene
Oil
Oil and gas fields
Oil fields
oil sludge
pahs
Petroleum
petroleum combustion
petroleum extraction
Pollutants
Polycyclic aromatic hydrocarbons
Pyrene
Sediment pollution
Sludge
Soil contamination
Soil environment
Soil pollution
United States > US
China
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Summary:The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs), which are on the United States Environmental Protection Agency (US EPA) priority pollutant list, were studied in ten different soil samples from Shengli Oil Field, China. The total PAHs concentrations in the sampled soils attained 1214.9–2965.1 ng/g (2159.6 ng/g on average). The highest total PAHs concentration was in the soil with a huge content of oil sludge, while the lowest was in fine soil environment areas. The soil contamination with PAHs in the study areas was classified as severe. The major pollutants were naphthalene, phenathrene, fluorine (Flu), pyrene (Pyr), while the detected concentration of benzo(a)pyrene (BaP), benzo(b)fluoranthene was relatively low. Among the 16 kinds of PAHs, the concentration increased in the order: 6 rings < 5 rings < 4 rings < 2 rings < 3 rings. The ratios of Flu/(Flu + Pyr) and indeno benzene(1,2,3-c,d)pyrene (IP)/(IP + BaP) were 0.46–0.48, and 0.36–0.64, respectively. Our results suggest that the main sources of PAHs were petroleum extraction and petroleum combustion. In addition, a small amount of PAHs originated from combustion of grass, woods, and coal.
ISSN:1801-5395
1805-9384
DOI:10.17221/35/2017-SWR