Abstract
The present study focused on distribution pattern of persistent organochlorine and organophosphorus pesticides residues found in water, sediments and fish tissues from the Kali River. The total 10 pesticides were observed viz., monochrotophos, parathione, phorete, malathion, α- BHC, β- BHC, γ-BHC, δ-BHC, endrine and endosulfon using gas chromatography electron capture detector technique. The concentrations of dominant pesticides were recorded as endosulfon (15.21 ng/L) and γ-BHC (15.54 ng/L) in water samples and γ-BHC (21.23 µg/kg) and parathion (19.14 µg/kg) in sediment samples and malathion (22.72 µg/kg) in liver of H. fossilis and monocrotophos (9.15 µg/g) in liver of Puntius ticto respectively in Kali river. High concentration of all selected pesticides dominant specially (malathion, phorate, monocrotophose, endrin and BHC) observed in all selected component riverin media are an indication of the current illegal use of banned pesticides for agricultural activities in the bank of river. The concentration exceeds to desirable limits indicators that there is a potential cancer risk for the local residents with life time consumption of pesticide contaminated fishes. The biomagnifications pattern of pesticides in Kali River is a major concern with present food web of river ecosystem and ultimately will be caused health hazards in dependent human community of catchment basin of River Kali in western U.P. India. Key words: Pesticide, water, sediments, fish tissues, Kali River.
Highlights
The term pesticides are used to cover a range of chemicals that kill organisms that humans consider undesirable
Since sediments provide good habitats for many small aquatic organisms, pesticide residues deposited on their surfaces will continue to be biologically available to trophic level to humans and wildlife that relies on the contaminated biota as food sources (Chapman Solomon and Weinstein, 2002)
The present study revealed that fish H. fossilis organs was indicated that arganophosphorus pesticides was dominant pesticides compare than organochlorine and fish H. fossilis liver was dominant organ for the accumulation of all pesticides and same think in P. ticto Shown in Tables 4 and 5 and Figure 2 to 7
Summary
The term pesticides are used to cover a range of chemicals that kill organisms that humans consider undesirable. Since sediments provide good habitats for many small aquatic organisms, pesticide residues deposited on their surfaces will continue to be biologically available to trophic level to humans and wildlife that relies on the contaminated biota as food sources (Chapman Solomon and Weinstein, 2002). It is important for this study to continue monitoring OCP residues in sediments, mussels, and river water. Sediments and mussels were used in the present study because they accumulated several pollutants substances at concentrations several orders of magnitude above those in water
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