Research Paper
Year: 2020 | Month: July-September | Volume: 4 | Issue: 3 | Pages: 1-7
Pollution Load by Synthetic Pesticide Residues in Water from Six Selected Points in the Downstream of River Benue, Viniklang, Jimeta Adamawa State
Mustapha Dauda1, Abdullahi, S. M2, Ahmad, A.3
1Department of Biological Sciences, University of Maiduguri, PMB 1069, Maiduguri
2Department of Biological Sciences, Federal University Kashere, Gombe
3Depatment of Zoology, Modibbo Adama University of Technology, PMB 2076, Yola
Corresponding Author: Mustapha Dauda
ABSTRACT
This work has quantified the pollution load by organochlorine and pyrethroids synthetic pesticide residues in the downstream of River Benue, Adamawa State, Nigeria with specific objectives of investigating the presence of synthetic pesticide residues, determine the respective concentrations of the residues as well as the determination of ecological implications of the residues. Water samples were collected from the River using plastic bottles. A total of six samples of water were collected from six points at an interval of 1 kilometer apart from the Downstream of the River Benue. The samples were taken to the laboratory and extracted using acetone, n-hexane and Dichloromethane. The extracts were analyzed using Gas Chromatography (GCMS, 7890, MSD, 5977A, Agilent Tech). The results revealed a total of 11 pesticides residues from the six samples media belonging to two classes of pesticide on the basis of chemical composition, Organochlorine and Pyrethroids. The concentration of organochlorine residues in water ranges from 0.49±0.07 to 4.61±1.01 (µ/l) and that of Pyrethroids ranges from 0.09±0.02 to 0.85±0.11 respectively. The result therefore showed normal values for organochlorines on comparison with global standard which may be attributed to their banned, however, recorded highest values than pyrethroids in the study samples. Pyrethroids residues on the other hand exceeded the normal value, hence, far beyond negligible limit as they may post adverse effects. This therefore necessitates a continuous monitoring of these residues.
Keywords: [Pollution load, synthetic pesticide, Organochlorine, Pyrethroid, River Benue]
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