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IJSTR >> Volume 3- Issue 11, November 2014 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Seasonal Variations of Heavy Metals Concentrations in Sediment Samples Around Major Tributaries in Ibeno Coastal Area, Niger Delta, Nigeria

[Full Text]

 

AUTHOR(S)

Nwadinigwe, Chukwuemeka A., Udo, Godwin J., Nwadinigwe, Alfreda O.

 

KEYWORDS

Keywords: Environment, Concentrations, Heavy metals, pollutants, Sediment,

 

ABSTRACT

Abstract: Seasonal Variations of Heavy Metals Concentrations in Sediment Samples around major Tributaries in Ibeno Coastal Area, Niger Delta, Nigeria was investigated using Atomic Absorption Spectrophotometer Unicam 939 model. Fifteen composite sediment samples were collected in February 2013 and June 2014 representing dry and wet seasons respectively. The concentrations (mg kg-1) of heavy metals in sediment for dry and wet seasons were in decreasing order of (dry) Fe (22.18±14.82) > Mn (9.67±2.75) > V (3.39±3.30) > Ni (2.18±0.78) > Cd (0.48±0.75) > Co (0.10±0.01) > Zn (0.49±0.08) > Pb (0.05±0.07) and (wet) Fe (23.28±0.24) > Mn (9.45±2.63) > V (3.31±3.34) > Ni (1.94±1.48) > Cd (0.48±0.74) > Pb (0.03±0.04). The mean concentrations of Mn, Ni, Pb, Zn, in dry season were higher when compared to the mean concentrations of the heavy metals in wet season except, Fe, V, and Co. The mean concentrations of Cd for dry and wet seasons were the same in dry and wet seasons. All the heavy metals were detected in all the sediment samples. The mean concentrations of all the heavy metals were higher than the control sediment in both dry and wet seasons but below the World Health Organization standards. Iron was found to be the most abundant metal in sediment for both seasons. The average pH (6.170) of the sediment was slightly acidic and below WHO and DPR standards. Frequent monitoring of aquatic environments is necessary in order to detect and prevent cumulative consequences of heavy metallic pollutants which may lead to sub-lethal effects in the aquatic fauna and clinical poisoning to man and farm animals that depend on them for food.

 

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