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OCCURRENCE AND PROFILE OF POLYCYCLIC AROMATIC HYDROCARBONS IN COALS AND SHALES FROM EASTERN NIGERIA

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Author(s): Jude .E. Ogala | Chukwujindu M.A. Iwegbue

Journal: Petroleum and Coal
ISSN 1337-7027

Volume: 53;
Issue: 3;
Start page: 188;
Date: 2011;
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Keywords: polycyclic aromatic hydrocarbons | coals | shales | Nigeria.

ABSTRACT
The concentrations and profiles of polycyclic aromatic hydrocarbons (PAHs) in coal and shale samplesfrom eastern Nigeria were examined. The total concentrations of PAHs in the samples ranged from304– 4082 μgkg-1 and 274 – 1815 μgkg-1 for coal and share samples respectively. The profiles of PAHs inthe coal and shale samples differed significantly. The coal samples had higher PAHs concentrationsthan the shale samples. In the coal samples 4-rings PAHs showed predominance over 2, 3, 5-and 6-rings polycyclic aromatic hydrocarbons while 3-rings polycyclic aromatic hydrocarbons showedpredominance over 2,4,5 and 6-rings PAHs in the shale samples. The results indicate coal from easternNigeria are characterized with high contents of 3 and 4-rings PAHs and poorer in 2,5 and 6-rings PAHs.This suggests that the coal samples are from seams of paralic origin.
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