Concentrations and ecological risks of metals in surface sediments of some coastal creeks in the Niger Delta, Nigeria

The concentrations of nine metals were measured by atomic absorption spectrophotometry in surface sediments of three coastal creeks, namely, the Ifie, Egbokodo and Ubeji creeks, in the Niger Delta of Nigeria, from August 2012 to January 2013. The aim of the study was to provide information on the sp...

Full description

Saved in:
Bibliographic Details
Published in:African journal of aquatic science 2018-09, Vol.43 (3), p.241-253
Main Authors: Iwegbue, CMA, Beecroft, OV, Ogala, JE, Egobueze, FE, Tesi, GO, Nwajei, GE, Martincigh, BS
Format: Article
Language:English
Subjects:
Atomic absorption analysis
Atomic absorption spectrophotometry
Cadmium
Chromium
Coastal ecology
Coastal inlets
Contamination
Contamination factors
Control limits
Copper
Creeks
Distribution patterns
Dry season
Ecological risk assessment
enrichment factors
Environmental risk
Heavy metals
Iron
Lead
Manganese
Metal concentrations
Metals
Nickel
Pollution index
Rainy season
Risk
Risk analysis
Risk factors
Seasonal distribution
seasonal variations
Seasons
Sediment
Sediment pollution
Sediments
soil quality
Spatial distribution
Spectral analysis
Spectrophotometry
Wet season
Zinc
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The concentrations of nine metals were measured by atomic absorption spectrophotometry in surface sediments of three coastal creeks, namely, the Ifie, Egbokodo and Ubeji creeks, in the Niger Delta of Nigeria, from August 2012 to January 2013. The aim of the study was to provide information on the spatial and seasonal distribution patterns, degree of contamination, and ecological risks of metals in these sediments. The mean concentrations of the nine metals in these creek sediments ranged from 0.30 to 3.20 mg kg −1 Cd; 10.7 to 24.7 mg kg −1 Pb, 125 to 466 mg kg −1 Cr; 3.1.10 to 14.9 mg kg −1 Cu; 4.7 to 14.3 mg kg −1 Co; 61.1 to 115 mg kg −1 Ni; 106 to 183 mg kg −1 Mn; 52.0 to 170 mg kg −1 Zn and 5 469 to 20 639 mg kg −1 Fe. In general, the metal concentrations were higher in the dry season than the wet season, except for Cr. The concentrations of Cd, Cr, Ni and Zn were above their regulatory control limits in sediment as specified by the Nigerian Regulatory Authority and Cd was identified as the main ecological risk factor. The enrichment factors for the studied metals followed the order: Cd > Cr > Ni > Zn > Pb > Co > Mn > Cu. The average multiple pollution index values indicated that these sediments were severely polluted with significant inputs from Cd, Ni and Cr.
ISSN:1608-5914
1727-9364
DOI:10.2989/16085914.2018.1511406