期刊名称：Research Journal of Environmental and Earth Sciences
印刷版ISSN：2041-0484
电子版ISSN：2041-0492
出版年度：2014
卷号：6
期号：4
页码：227-232
DOI：10.19026/rjees.6.5764
出版社：Maxwell Science Publications
摘要：Locust control requires sometimes an important use of pesticides in infested area with concomitant environment contaminations. Using the Gas Chromatography (GC) technical, pesticide residues were determined in water samples collected from locust outbreak areas of Burkina Faso, West Africa. The risk quotient method coupled with probabilistic risk assessment model was used for ecological risk assessment of pesticide detected in water. For ten pesticides belonging to Organophosphates, Pyrethroid and Phenylpyrazole chemical class, only diazinon was detected in water samples from all sites with content ranging from 2.02 to 2.21 &mug/L. The presence of pesticide residues seem to be linked to specific agropedoclimatic conditions of study area. Results of risk assessment show that diazinon level in water generates a risk for considered groups of aquatic organisms following this decreasing order: Aquatic invertebrates ˃Crustacean˃Fish˃Algae. This risk is particularly important if only most sensible group of organisms is taken account or if probabilistic risk assessment is applied. The findings suggest that pesticides in locust control generate a potential hazard for aquatic organisms. Cautious or restrictive use of these agrochemicals in the Sahelian context is recommended. Moreover, Ecological risk assessment approach that we applied can provide more information for risk managers and decision makers.
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