Qualitative and quantitative analysis of pesticides identified in surface and groundwater in the western region of Algeria

Nadia Berkok; Mohammed Hadjel; Omar Bentata

doi:10.18540/jcecvl10iss10pp21120

Authors

Nadia Berkok Laboratory of science, technology and process engineering (LSTGP), University of Sciences and Technology of Oran, Mohamed Boudiaf, BP 1505 El M’Naouer, 31000, Oran, Algeria
Mohammed Hadjel Laboratory of science, technology and process engineering (LSTGP), University of Sciences and Technology of Oran, Mohamed Boudiaf, BP 1505 El M’Naouer, 31000, Oran, Algeria.
Omar Bentata Laboratory of science, technology and process engineering (LSTGP), University of Sciences and Technology of Oran, Mohamed Boudiaf, BP 1505 El M’Naouer, 31000, Oran, Algeria.

DOI:

https://doi.org/10.18540/jcecvl10iss10pp21120

Keywords:

Pollution, Pesticide, Micropollutant, Tafna catchment

Abstract

In this study, we are looking into the number of pesticides in a river for the West Tafna Watershed. Since it may be very difficult to detect pesticides in water, a sampling attempt was made at a number of control locations around the research region during the course of a two-year observation. Efforts are being made to identify and quantify pesticides like organochlorine, nitrogen, and phosphorous. Several techniques for extraction, purification, detection, and quantification were used after sampling. Liquid extraction method was used to remove pesticides from water. The samples and various pesticide standards were previously selected in accordance with the results desired: Mix A is made up of sixteen pesticides, while Mix B and Mix 1 are each made up of seven pesticides that are used for external calibration. Results showed that the content of many pesticides, including methylparathion (89.01 µg/L), azinophosphate-methyl (56.66 µg/L), O-ethyl phenylthiophosphazene (195.98 µg/L), and O-4-nitro phenyl (NHB), is much higher than the current limitations of 1.0 µg/L for surface water. The same chemicals are present in groundwater at excessive numbers that include: EPN 209.54 µg/L, Azinophosphate-methyl 183.01 µg/L, 2,4,5-T methyl ester 149.13 µg/L, Dichlorvos 143.43 µg/L, Thiophosphate of O,O-dimethyl and O-2,4,5-trichlorophenol (Ronnel) 57.18 µg/L, Diazinon 55.37 µg/L and Parathion 52.61 µg/L.

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