The concentration values for PCB, HCB, Heptachlor epoxide, and Chlordane in this study indicate low ecological risk to sediment dwelling organisms. The ecotoxicological impact of sediment pollution by PCBs and OCPs was assessed using sediment quality guidelines specified by the Canadian Council of Ministers of the Environment. The calculated values of DDD+DDE/ DDT showed that the presence of DDT from both the rivers is a result of historical input. Sabaki Bridge in the Sabaki River and Tana 4 in the Tana River recorded high levels of both PCBs and OCPs. The concentration range of PCBs and OCPs were 0.65-9.29 ng/g dw and 0.47-9.84 ng/g dw, respectively. Polychlorinated biphenyls (PCBs) and Organochlorine pesticides (OCPs) in the surface sediments of the Sabaki and Tana estuaries were studied to determine distribution as well as their ecological risk.
River exceeded environmental quality standards and are reason for concern. In some areas, the concentrations of organochlorine pesticides in the sediment of the Ouémé New formulation to protect cotton, was also identified.
The organophosphorous pesticide chlorpyrifos, used in a Hexachlorbutadiene, hexachlorobenzene and octachlorostyrene. Organochlorine pesticides identified in sediment samples included pp′-DDE, op′-DDD, pp′- DDD, op′-DDT, pp′-DDT, α-Įndosulfan, β-endosulfan, endosulfan sulphate, α-HCH, β-HCH, lindane, aldrin, dieldrin, endrin, telodrin, isodrin, cis- and transheptachlorepoxide, Except for one location, Tanéka-Koko, all areas were contaminated by more thanĢ0 pesticides. Locations along the Ouémé River from upstream to downstream. In this study, organochlorine and organophosphorous pesticide residues were measured in more than 35 sediment samples collected on nine It is 510 km long and its catchment drains 75% of the country. The Ouémé River is one of the most important rivers in the Republic of Bénin. In some areas, the concentrations of organochlorine pesticides in the sediment of the Ouémé River exceeded environmental quality standards and are reason for concern. The organophosphorous pesticide chlorpyrifos, used in a new formulation to protect cotton, was also identified. Organochlorine pesticides identified in sediment samples included pp'-DDE, op'-DDD, pp'-DDD, op'-DDT, pp'-DDT, alpha-endosulfan, beta-endosulfan, endosulfan sulphate, alpha-HCH, beta-HCH, lindane, aldrin, dieldrin, endrin, telodrin, isodrin, cis- and trans-heptachlorepoxide, hexachlorbutadiene, hexachlorobenzene and octachlorostyrene. Except for one location, Tanéka-Koko, all areas were contaminated by more than 20 pesticides. In this study, organochlorine and organophosphorous pesticide residues were measured in more than 35 sediment samples collected on nine locations along the Ouémé River from upstream to downstream. uses the "Restricted To Adults" (RTA) website label to better enable parental filtering.Ĭopyright © 2022, - All rights reserved.The Ouémé River is one of the most important rivers in the Republic of Bénin. To remove physical video file please contact owner of the website where it hosted.Īll models appearing on this website are 18 years or older. We do not control, host, or own any of the content on this site. If you prefer Xxx HD videos, there is an entire section of the website dedicated to that type of porn.ĭisclaimer: is just a search engine for porn videos.
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