Variation analysis of organochlorine pesticides in waters and sediments from a tropical river

espanolEn este articulo, se analiza la variacion temporal de los pesticidas organoclorados (POCs) en el agua y los sedimentos de un rio influenciado por la actividad en un campo agricola en un pais tropical durante el periodo 2013-2016. La novedad consiste en aumentar los estudios de concentraciones de POC en agua y sedimentos de rios para contribuir a establecer umbrales de concentraciones que permitan proteger la biota en suelos y aguas. Los POCs promedio disueltos en agua y sorbidos sobre sedimentos variaron de la siguiente manera: p.p'-DDT (0.001 – 0.022 μg.L-1), (0.1 – 8.24 μg.kg-1), o.p'-DDT (0.001-0.021 μg.L-1), (0.51 – 5.76 μg.kg-1), p.p'-DDD (0.001-0.01 μg.L-1), (0.14 – 1.96 μg.kg-1), p.p'-DDE (0.001-0.027 μg.L-1), (0.52 – 7.32 μg.kg-1), o.p'-DDE (0.001-0.041 μg.L-1), (0.2 – 5.52 μg.kg-1), Aldrin (0.004-0.053 μg.L-1), (0.23 – 8.22 μg.kg-1), Dieldrin (0.001-0.032 μg.L-1), (1.13 – 6.82 μg.kg-1) y Endrin (0.001-0.008 μg.L-1), (1.16 – 7.60 μg.kg-1). El manejo de POCs por la actividad en el campo agricola esta siendo controlando EnglishIn this paper, it is analyzed the temporal variation of organochlorine pesticides (OCPs) in water and sediments from a river influenced by the activity in an agricultural field in a tropical country during the period 2013-2016. The novelty consists of increasing the studies of concentrations of OCPs in water and sediments of rivers for contributing to establish thresholds of concentrations that allow to protect the biota in soils and waters. The mean values of the OCPs dissolved in water and sorbed on sediments varied as follows: p.p'-DDT (0.001 – 0.022 μg.L-1), (0.1 – 8.24 μg.kg-1), o.p'-DDT (0.001-0.021 μg.L-1), (0.51 – 5.76 μg.kg-1), p.p'-DDD (0.001-0.01 μg.L-1), (0.14 – 1.96 μg.kg-1), p.p'-DDE (0.001-0.027 μg.L-1), (0.52 – 7.32 μg.kg-1), o.p'-DDE (0.001-0.041 μg.L-1), (0.2 – 5.52 μg.kg-1), Aldrin (0.004-0.053 μg.L-1), (0.23 – 8.22 μg.kg-1), Dieldrin (0.001-0.032 μg.L-1), (1.13 – 6.82 μg.kg-1) and Endrin (0.001-0.008 μg.L-1), (1.16 – 7.60 μg.kg-1). The management of OCPs by the activity in the agricultural field is being controlled