American Journal of Environmental Protection
ISSN (Print): 2328-7241 ISSN (Online): 2328-7233 Website: http://www.sciepub.com/journal/env Editor-in-chief: Mohsen Saeedi, Hyo Choi
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American Journal of Environmental Protection. 2014, 2(1), 22-31
DOI: 10.12691/env-2-1-5
Open AccessArticle

Distribution of Some Atmospheric Heavy Metals in Lichen and Moss Samples Collected from Eket and Ibeno Local Government Areas of Akwa Ibom State, Nigeria

Aniefiok E. Ite1, 2, , Imaobong I. Udousoro3 and Udo J. Ibok1

1Faculty of Natural and Applied Sciences, Akwa Ibom State University, P.M.B., Uyo, Akwa Ibom State, Nigeria

2Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, United Kingdom

3Department of Chemistry, University of Uyo, P.M.B., Uyo, Akwa Ibom State, Nigeria

Pub. Date: March 10, 2014

Cite this paper:
Aniefiok E. Ite, Imaobong I. Udousoro and Udo J. Ibok. Distribution of Some Atmospheric Heavy Metals in Lichen and Moss Samples Collected from Eket and Ibeno Local Government Areas of Akwa Ibom State, Nigeria. American Journal of Environmental Protection. 2014; 2(1):22-31. doi: 10.12691/env-2-1-5

Abstract

The atmospheric deposition of some heavy metals was investigated using lichen (Parmelia caperata) and moss (Polytrichum juniperinum, Calymperes erosum and Racopilum africanum) samples collected from two oil–producing host communities viz Eket and Ibeno Local Government Areas of Akwa Ibom State, Nigeria. Lichen and moss samples were analysed using atomic absorption spectrometry equipped with flame and graphite furnace after decomposition using acid digestion technique. The concentrations of heavy metals in lichen and moss samples ranged from 0.001 – 0.092 μg g−1 for cadmium (Cd); 0.004 – 8.793 μg g−1 for chromium (Cr); 0.989 – 1.950 μg g−1 for cobalt (Co); 2.350 – 110.760 μg g−1 for copper (Cu); 10.530 – 153.320 μg g−1 for manganese (Mn); 1.425 – 21.730 μg g−1 for nickel (Ni); 0.001 – 17.380 μg g−1 for lead (Pb), and 23.530 – 130.600 μg g−1 for zinc (Zn). The statistical significance of correlations between Cu–Pb, Cu–Zn, Pb–Ni and Mn–Zn concentrations confirmed anthropogenic sources mainly due to emissions from vehicular traffic, fossil fuel combustion, solid waste disposal and other local anthropogenic activities. In a direct comparison, some of the target heavy metals such as Cd, Cr, Mn, Ni and Zn were accumulated at higher concentrations in moss samples compared to lichen from the same sampling site. The results obtained reveal important contributions towards understanding of heavy metal deposition patterns and provide baseline data that can be used for potential identification of areas at risk from atmospheric heavy metals contamination in the region. The use of epiphytic lichens and mosses provides a cost–effective approach for monitoring regional atmospheric heavy metal contamination and may be effectively used in large scale air pollution monitoring programmer.

Keywords:
atmospheric deposition heavy metals lichen moss atomic absorption spectrometry akwa ibom state nigeria

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