Evaluating Bioremediation Potentials of Fungi Species (Alternaria Sp., Aspergillus Sp. and Fusarium Sp.) on Heavy Metals from Plausible Industrial Effluent Discharges in Mmiri Ele Stream in Nnewi, Anambra State, Nigeria
Biotechnology Journal International, Volume 27, Issue 1,
Page 8-24
DOI:
10.9734/bji/2023/v27i1668
Abstract
The greatest challenge of man today is to deal with metal pollution problems because unlike organic compounds which are decomposed naturally, heavy metals tend to persist on the aquatic environment, hence get accumulated at different sensitive sites. Given the growth in environmental awareness, emphasis is given on this exploration of environment friendly ways for decontamination procedures. Attention has been drawn to bioremediation which is a good alternative to conventional remediation technologies. The preference for it is based on the fact that it is of low cost, and generates non-toxic by products. Microorganisms have acquired a variety of mechanisms to adapt themselves to the toxicity of heavy metals. The results obtained from the bioremediation of cadmium, chromium and copper in both the water samples and sediment samples using Alternaria sp, Aspergillus sp and Fusarum sp, show that there is a significant decrease in the quantities of cadmium, chromium and copper in both the water samples and sediment samples upon treatments with the selected microorganisms. The result of the bioremediation of chromium shows a significant decrease in the amount of chromium in the sample from the mean value of 0.423 for pre-remediation treatment to 0.08 for post remediation treatment. There was also a reasonable decrease in the amount of copper metal in the water sample from 0.193 to 0.092. The post bioremediation of cadmium in sediment sample shows a significant decrease in the amount of cadmium from 0.2430 to 0.1880, tending towards the value of the control. The bioremediation of the heavy metals significantly reduced the amount of the heavy metals present in the polluted environment. Hence, it can be said that under suitable environmental and biochemical conditions, microorganisms can be used in the remediation of the heavy metals present in a heavy metal polluted environment.
- Heavy metals
- bioremediation
- microorganisms
- polluted river
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References
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