Ecological and Human Health Risk Assessment of Pesticide Residues in Fish and Sediments from Vea Irrigation Reservoir

Kanton Bello Richard  Danladi; Osei  Akoto

doi:10.4236/jep.2021.124017

Kanton Bello Richard Danladi, Osei Akoto

Abstract: The low yield of food production ascribed to harm caused by pests has led to the application of pesticides to food crops. Pesticide residues from the application on crops are mostly found in foods that can cause diseases for consumers of such products. A total of 37 pesticide residues consisting of 15 organochlorines (OC), 13 organophosphorus (OP) and 9 synthetic pyrethroids (SP) were determined. The QuEChERS method was exploited for extraction and clean-up. Gas Chromatograph was used for detection and quantification which was equipped with an electron capture detector and pulse flame photometric detector. The results showed that the mean concentrations of pesticides in fish ranged from 0.007 mg·kg^-1 to 1.026 mg·kg^-1 for OCs, 0.002 mg·kg^-1 to 0.190 mg·kg^-1 for OPs and 0.004 mg·kg^-1 to 0.032 mg·kg^-1 for SP. Sediments have mean concentrations ranged from 0.005 mg·kg^-1 to 1.207 mg·kg^-1 for OCs. OP ranges from 0.002 mg·kg^-1 to 0.399 mg·kg^-1 and 0.003 mg·kg^-1 to 0.202 mg·kg^-1 for synthetic pyrethroids. Maximum Residue Limits were exceeded in both fish and sediment samples except for malathion, fenitrothion, profenofos, gamma-chlordane, and deltamethrin. Exposure in children ranged from 4.60 × 10^-6 mg·kg^-1·d^-1 to 2.36 × 10^-3 mg·kg^-1·d^-1 and in adults it is from 1.97 × 10^-6 mg·kg^-1·d^-1 to 1.01 × 10^-3 mg·kg^-1·d^-1. Health risk estimation revealed a non-cancer risk potential of β-HCH in sediment and aldrin and p,p'-DDE in fish. Carcinogenic risk assessed for organochlorine pesticide residues indicates cancer benchmark concentrations greater than 10^-4 to 10^-6 threshold for acceptance.

Keywords: Pesticides, Risk, Carcinogenic, Organochlorine, Organophosphorus, Synthetic Pyrethroids

Cite this paper: Danladi, K. and Akoto, O. (2021) Ecological and Human Health Risk Assessment of Pesticide Residues in Fish and Sediments from Vea Irrigation Reservoir. Journal of Environmental Protection, 12, 265-279. doi: 10.4236/jep.2021.124017.

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