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Title: Characterization and source assessment of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in sediments of the Fosu lagoon, Ghana

Abstract

The first results ever obtained on polycyclic aromatic hydrocarbon (PAHs) concentrations in the Fosu lagoon surface sediments are presented together with corresponding heavy metal (Fe, Mn, Cd, Zn and Ni) concentrations. Samples collected on a monthly basis from November 2003-April 2004 (heavy metals) and December 2003-January 2004 (PAHs) at 8 locations, representing different anthropogenic sources of contamination to the lagoon, were analyzed. Concentrations of Cd and Ni in the lagoon sediment suggest greater contamination to the lagoon from industrial activities in the vicinity of the lagoon; 50% of the sediment samples exceeded some established sediment Cd guidelines for the protection of aquatic lives. Then, 15 PAHs were detected among the sediments from the different locations and the compositional pattern in decreasing order was 3-ring {gt} 5-ring {gt} 4-ring {gt} 6-ring {gt} 2-ring PAH compounds. {Sigma} PAH concentrations in the sediment samples ranged from 254 to 558 mg/kg, with a mean of 359.4 mg/kg. Two distinct areas were identified to be a major source of anthropogenic load of both heavy metals and PAH; the mechanical shop in the northeastern sector of the lagoon is the main location for the input of Cd and it's associated PAH compounds (e.g., acenapthylene, acenaphthene, naphthalenemore » and benzo(a)fluoranthene) and to a lesser extent Ni. Both combustion and petroleum sources may account for PAH loads from this area. The residential area in the northern sector is responsible for high loads of Mn and its associated PAH compounds (e.g., phenanthrene, benzo(a)pyrene and anthracene). These chemicals seem to enter the lagoon mainly by the combustion of especially wood or coal.« less

Authors:
; ; ; ;  [1]
  1. Sask Power, Estevan, SK (Canada)
Publication Date:
OSTI Identifier:
20838278
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Environmental Science and Health, Part A: Toxic Hazardous Substances and Environmental Engineering; Journal Volume: 41; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; METALS; POLYCYCLIC AROMATIC HYDROCARBONS; SEDIMENTS; GHANA; PONDS; CONCENTRATION RATIO; CONTAMINATION; POLLUTION SOURCES; WATER POLLUTION; CADMIUM; PETROLEUM; MANGANESE; WOOD; COAL; COMBUSTION PRODUCTS

Citation Formats

Gilbert, E., Dodoo, D.K., Okai-Sam, F., Essuman, K., and Quagraine, E.K. Characterization and source assessment of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in sediments of the Fosu lagoon, Ghana. United States: N. p., 2006. Web. doi:10.1080/10934520600966649.
Gilbert, E., Dodoo, D.K., Okai-Sam, F., Essuman, K., & Quagraine, E.K. Characterization and source assessment of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in sediments of the Fosu lagoon, Ghana. United States. doi:10.1080/10934520600966649.
Gilbert, E., Dodoo, D.K., Okai-Sam, F., Essuman, K., and Quagraine, E.K. Fri . "Characterization and source assessment of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in sediments of the Fosu lagoon, Ghana". United States. doi:10.1080/10934520600966649.
@article{osti_20838278,
title = {Characterization and source assessment of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in sediments of the Fosu lagoon, Ghana},
author = {Gilbert, E. and Dodoo, D.K. and Okai-Sam, F. and Essuman, K. and Quagraine, E.K.},
abstractNote = {The first results ever obtained on polycyclic aromatic hydrocarbon (PAHs) concentrations in the Fosu lagoon surface sediments are presented together with corresponding heavy metal (Fe, Mn, Cd, Zn and Ni) concentrations. Samples collected on a monthly basis from November 2003-April 2004 (heavy metals) and December 2003-January 2004 (PAHs) at 8 locations, representing different anthropogenic sources of contamination to the lagoon, were analyzed. Concentrations of Cd and Ni in the lagoon sediment suggest greater contamination to the lagoon from industrial activities in the vicinity of the lagoon; 50% of the sediment samples exceeded some established sediment Cd guidelines for the protection of aquatic lives. Then, 15 PAHs were detected among the sediments from the different locations and the compositional pattern in decreasing order was 3-ring {gt} 5-ring {gt} 4-ring {gt} 6-ring {gt} 2-ring PAH compounds. {Sigma} PAH concentrations in the sediment samples ranged from 254 to 558 mg/kg, with a mean of 359.4 mg/kg. Two distinct areas were identified to be a major source of anthropogenic load of both heavy metals and PAH; the mechanical shop in the northeastern sector of the lagoon is the main location for the input of Cd and it's associated PAH compounds (e.g., acenapthylene, acenaphthene, naphthalene and benzo(a)fluoranthene) and to a lesser extent Ni. Both combustion and petroleum sources may account for PAH loads from this area. The residential area in the northern sector is responsible for high loads of Mn and its associated PAH compounds (e.g., phenanthrene, benzo(a)pyrene and anthracene). These chemicals seem to enter the lagoon mainly by the combustion of especially wood or coal.},
doi = {10.1080/10934520600966649},
journal = {Journal of Environmental Science and Health, Part A: Toxic Hazardous Substances and Environmental Engineering},
number = 12,
volume = 41,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}