International Science Community Association Research Journal of Chemical Sciences 2231-606X 10 1 2020 02 18 Seasonal occurrence, sources and toxic potential of polycyclic aromatic hydrocarbons (PAHs) in the superficial sediments from Vridi canal (CÔte d\'Ivoire) 23 33 EN Beckley Ikhajiagbe 1 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Boniface O. Edegbai 2 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Melody A. Eweka 3 Environmental Biotechnology and Sustainability Research Group, Department of Plant Biology and Biotechnology, University of Benin, Nigeria Dinesh R. Pandithavidana 1 Department of Chemistry, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri Lanka Rangika K.W. Munaweera 2 Department of Chemistry, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri Lanka Ahola David Oklo 1 Chemistry Department, Benue State University, PMB 102119, Makurdi, Nigeria Maxwell Idoko Ocheri 2 Geography Department, Benue State University, PMB 102119, Makurdi, Nigeria Alimi John Praise 3 Nigerian Stored Products Research Institute, PMB 5044, Dugbe, Ibadan, Nigeria Patricia Ani Aleke 4 Chemistry Department, Benue State University, PMB 102119, Makurdi, Nigeria KONAN Kouadio F. Arthur 1 Department of Mathematics-Physics-Chemistry-Computer Science, Physics Chemistry Laboratory, Jean Lorougnon Guédé University of Daloa, 12 BP V 25 Daloa 12, CÔte d\'Ivoire YAO Marcel Konan 2 Physical Chemistry Laboratory, UFR SSMT, Félix Houphouët-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, CÔte d′Ivoire DONGUI Bini Kouamé 3 Department of Mathematics-Physics-Chemistry-Computer Science, Physics Chemistry Laboratory, Jean Lorougnon Guédé University of Daloa, 12 BP V 25 Daloa 12, CÔte d\'Ivoire TROKOUREY Albert 4 Physical Chemistry Laboratory, UFR SSMT, Félix Houphouët-Boigny University of Cocody Abidjan, B.P. V34 Abidjan, CÔte d′Ivoire > Research Paper 2019 9 6 2020 02 18 The seasonal dynamics of Benzo[a]Anthracene, Pyrene, Benzo[b]Fluoranthene, Benzo[k]Fluoranthene, Benzo[a]Pyrene, Benzo(g,h,i) Perylene, Fluoranthene and Indeno(1,2,3-cd) Pyrene was monitored in the superficial sediments from Vridi canal over a year (from April 2014 to March 2015). In conducting this study, monthly sampling was doing at three different stations in this estuary, a collection of 36 samples over the study period. The extracts of these hydrocarbons, obtained from these samples according to MA.400-HAP 1.1 standard, were assayed by high performance liquid chromatography (HPLC) with UV/fluorescence detectors coupled to a GC-MS mass spectrometer. The results show the absence of Benzo (g,h,i) Perylene and Indeno (1,2,3-cd) Pyrene in these entities over the entire study period. The other six polycyclic aromatic hydrocarbons, with a strong seasonal dynamics, were detected in these substrates only in a few seasons and, this with relatively high concentrations (ranging between 0.020 ± 0.001 and 123.40 ± 6.17mg/kg per dry weight). As a result, significant seasonal mean values of & Copyright@ International Science Community Association 931;8PAHs (ranging between 0.020 ± 0.001 and 158.07 ± 2.13mg/Kg per dry weight) with its annual mean value of 48.08 ± 0.83mg/kg per dry weight were observed on this period. Thus the superficial sediments from Vridi Canal are heavily contaminated by polycyclic aromatic hydrocarbons. The immediate consequence of this situation is the advanced state of degradation of Vridi canal with very high ecological risks as illustrated by four marine sediment quality guidelines (Apparent Effect Threshold Approach Consensus Based Sediment Quality Guidelines Toxic BaP equivalent quotient Hazard quotients) used in this study. This pollution is of petrogenic origin essentially of the only and great oil-producing industrial area of CÔte d\'Ivoire located near of this ecosystem.