Determinación de pesticidas y calidad de agua de efluentes de florícolas en la zona de Cayambe.

Abstract

The present research was carried out along the sub-basin of the Pisque River whose area is 1136 km2 belonging to the cantons of Pedro Moncayo and Cayambe in the province of Pichincha; with the purpose of determining the presence of pesticides and the water quality of the effluents, the recipients of the services of the economic and physiological activity of the habitants of this sector. To determine the water quality, 28 points were sampled, covering the entire sub-basin mentioned above. The sampling and analysis of most points have been made once a month for three months; the results are reflected in the high presence of fecal coliforms, except in the points that are in the upper part of the sub-basin where all the parameters in the legal regulations are met. The types of pesticides analyzed were carbofuran, deltamethrin, carbaryl, thiabendazole, fluazinam and buprimate; in the points: river Blanco (middle point), river San José, river Tupigachi, canal de water channel and Ascazubi. The results were published The results were defined in the river Tupigachi is the effluent with the highest presence of pesticides analyzed with a concentration of: 237.48 ppm Carbofuran; 495 ppm Carbaryl; 155.82 ppm of Deltamethrin; 63.42 ppm fluazinam; 26.14 ppm of Thiabendazole and 37.98 ppm of buprimate. The irrigation channel It ascends to be the most important point of the sub-basin that already exist of carbofuran and deltamethrin with 0.24 ppm and 27.17 ppm as a minimum; what confirms the presence of these pesticides in the entire path of the river Pisque.