Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils

SUN Yu chuan; SHEN Li cheng; YUAN Dao xian

doi:10.3969/j.issn.1001-4810.2013.01.012

Volume 32 Issue 1

Mar. 2013

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SUN Yu chuan, SHEN Li cheng, YUAN Dao xian. Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils[J]. CARSOLOGICA SINICA, 2013, 32(1): 79-87. doi: 10.3969/j.issn.1001-4810.2013.01.012

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SUN Yu chuan, SHEN Li cheng, YUAN Dao xian. Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils[J]. CARSOLOGICA SINICA, 2013, 32(1): 79-87. doi: 10.3969/j.issn.1001-4810.2013.01.012

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Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils

doi: 10.3969/j.issn.1001-4810.2013.01.012

1.
Key Laboratory of Eco environments in Three Gorges Reservoir Region, Ministry of Education / School of Geographical sciences
2.
Key Laboratory of Eco environments in Three Gorges Reservoir Region, Ministry of Education / School of Geographical sciences；Institute of Karst Geology, CAGS / Karst Dynamics Laboratory, MLR & GZAR

Received Date: 2012-09-29
Publish Date: 2013-03-25

Abstract

Abstract

The concentration of 16 prior polycyclic aromatic hydrocarbons(PAHs) are measured by gas chromatography equipped with a mass spectrometry detector for samples collected from the overlaying soils of four typical epikarst springs that located in Nanchuan District, Chongqing City. The distribution, possible sources and contaminated level of the 16 PAHs are investigated. The detection ratios of the 16 PAHs are 100 % in all of the soil samples. The total concentration of the 16 PAHs in the soils range from 439.19 to 3 329.72 ng/g with the mean value being 1 392.44 ng/g. The PAH constituents are affected by altitude. With the increase of altitude, the percent of low molecular weight PAHs increase, but the percent of high molecular weight PAHs decrease. The isomer ratios reveal that PAHs in soils mainly come from the combustion of coal, biomass and petroleum. The TEQcarc of the 16 PAHs range from 18.65 to 501.13 ng/g, the mean value is 140.57 ng/g, and 96.8 % of which is contributed by 7 carcinogenic PAHs. Among the soils of the four epikarst spring, the level of PAHs contamination in HG epikarst spring soils is highest, and the contamination level of SF epikarst spring soils are lowest, but in BSW soils, the effect of pine needle litter fall should be taken into account.
- epikarst spring,
- soil,
- polycyclic aromatic hydrocarbons,
- sources

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References(35)

References

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Distributing features and source analysis of polycyclic aromatic hydrocarbons in epikarst soils

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