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(2017) Journal of Materials and Environmental Science, 8 (3), pp. 777-783.

Removal of pesticides by electrochemical oxidation using a boron doped diamond anode

Aimer, Y.a , Benali, O.b , Salghi, R.c , Latapie, L.d , Groenen Serrano, K.d

ABSTRACT :

- The direct or indirect discharges of the effluents of the agricultural practices constitute the important causes of degradation of the ecosystems. Particularly, the effluents of the agricultural practices (phytosanitary treatments, wash of the material and the rinsing of atomizers) circulate most of the time through the matrix of the ground and reach streams and even groundwaters.
- These practices establish a direct threat for the environment, the living beings and especially for the human health. Consequently, it needs to develop technics to detoxify the pesticide residues to reduce at least areas and contaminated matrix. In the present work, the treatment of synthetic and commercial solutions by electrolysis on BDD anode has been studied.
- The molecule model chosen was dimethoate that is an organophosphate insecticide and acaricide used against a broad range of insects and on a number of crops. It has been shown that the dimethoate has been removed completely by electro-oxidation and the kinetic follows a pseudo-first order reaction. The use of electrolytes containing chlorides must to be avoided because of the formation of undesired compounds such as perchlorate.
- The study of the influence of the applied current intensity revealed that the higher the current intensity, the faster the COD removal is. © 2017, University of Mohammed Premier Oujda Morocco.