Research Paper
Year: 2020 | Month: April | Volume: 7 | Issue: 4 | Pages: 278-285
Quantitative Analysis of Organophosphate Pesticides Residues in Water and Sediment Samples of River Benue, Jimeta Adamawa State
Mustapha Dauda
Department of Biological Sciences, University of Maiduguri, Maiduguri, Nigeria.
ABSTRACT
Environmental pollution by synthetic pesticides in water bodies have been a great concern globally and in developing countries such as Nigeria in particular as most of these pesticide compounds are persistent and bio-accumulative with high toxicity effects on ecosystems and humans. This work was aimed at quantifying synthetic pesticide residues of Organophosphate origin in the River Benue, Jimeta Adamawa State, Nigeria with specific objectives of investigating the presence of organophosphate synthetic pesticide residues; determine the respective concentrations of the residues. Water and sediment samples were collected from the River. A total of six samples each of water and sediment samples were collected from six points at an interval of 1 kilometer apart from the Downstream of the River Benue. One kg sample of sediment was also collected from the six points. 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 6 pesticides residues from the two media belonging to the class of pesticide Organophosphate on the basis of chemical composition. Organophosphate residues range from 0.01±0.01 to 0.97±0.10 (µ/l) in water and 0.01±0.0 to 1.23±0.11 (µ/kg) in sediment respectively. The results revealed higher concentration in sediment than water. The Organophosphate residues 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: Quantitative, Organophosphate, water, sediment, Jimeta
[PDF Full Text]