Biological Evidence 2018, Vol.8, No.3, 21-31
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assessed the environmental risk level of heavy metal in sediment of Nun River in Bayelsa state. The results
showed that there was significant variation (P<0.05) among the various locations. Positive significant correlations
also exist between the heavy metals. Environmental risk indices showed low to moderate contamination
(contamination factor, degree of contamination and pollution load index), un-contamination to moderate
contamination (index of geo-accumulation), and low ecological risk. Positive quantification of contamination
values reveals pollution due to anthropogenic activities. Therefore, there is the need to effectively manage
activities leading to increased sediment heavy metals in Nun River system in Bayelsa state, Nigeria.
Author’s contributions
OAA conceived the idea and carried out the experimental design. FAM carried the sampling, laboratory analysis and managed the
literature search. SCI carried out the statistical analysis. FAM and SCI involved in draft manuscript preparation. OAA corrected the
tenses in the manuscript. All authors read and approved the final manuscript.
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