THE EVALUATION OF HEAVY METAL LOAD IN BENTHIC SEDIMENT USING SOME POLLUTION INDICES IN OSSIOMO RIVER, BENIN CITY, NIGERIA.

Dr Osikemekha Anani Anthony and John Ovie Olomukoro   (Published 2017)

Dr Anani Anthony
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Abstract

The sediment-pollution load of any river can be associated with wide range of anthropogenic and natural factors that surround it. A thorough analysis of the nature of sediments is required to identify the natural lithogenic and anthropogenic sources of contaminants. A total of 360 sediment samples were collected with an Eckman grab and 9 heavy metal parameters investigated monthly between March 2015 and August 2016 using standard analytic methods and quality control techniques. The concentrations of Fe, Mn, Zn, Cu, Cr, Cd, Pb, Ni and V, varied individually with a significant difference (p < 0.05) and no significant difference (p >0.05) values across the stations with their ranks in this order Fe > Mn > Zn > Cu > Cr > Cd > Pb > Ni > V. Most of the environmental computed heavy metals in this current study were above the national and international unity standards as compared with their standard limits. The Enrichment Factors, Pollution Index (PI) and Nemerow Integrated Pollution Index (NIPI) were used to assess heavy metals contamination in the river bed. All the indices showed varied grades of characterized pollution with EF values >1, PI and NIPI values >3. The sources of pollution were mainly from lithogenic (crustal origin) and anthropogenic activities. The high concentration values of some of the metals in the sediment indicated that more comprehensive investigations are required to be carried out in this study area to ensure long term preservation of aquatic biodiversities and the water course.


Item Type: Journal article(non-copyrighted)
Format: PDF document,   1.03 MB
Copyright: Creative Commons LicenseCreative Commons license
Keywords: Heavy Metals, Enrichment Factor, Pollution Index, Nemerow Index, Lithogenic origin
Department: Natural Science
Field of Study: Biology
Uploaded By: Enoyoze Esosa
Date Added: 08 Feb 2019 7:05am
Last Modified: 08 Feb 2019
Journal URL: https://www.edouniversity.edu.ng/oer/journal/the_evaluation_of_heavy_metal_load_in_benthic_sediment_using_some_pollution_indices_in_ossiomo_river_benin_city_nigeria


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