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Introduction: The occurrence of plastic waste materials in the aquatic environment is receiving enormous attention all over the world due to its negative impacts on aquatic organisms. Micropellet litters have been found to adsorb and absorbs persistent organic endocrine disrupting chemicals (EDCs). Endocrine disrupting chemicals are recognized toxic chemicals to human and organisms. Aim: This study quantifies occurrence of micropellet particles in Lagos Lagoon and their EDCs contents. Methodology: The sampling was conducted from 2016 to 2018 at eight sampling locations with three points established in each of the sampling station. The chemical analysis of EDCs was conducted by gas chromatography coupled with electron capture detector and flame ionization detector. Results: Micropellet particles occurrence was highest in surface water (67%) compared to (33%) in sediment during the period of sampling. EDCs contents reflect contamination of PCBs and PAHs in the extracted micropellet particles. Some sampling stations contained relatively higher PAHs concentrations but very low concentration of PCBs. Conclusion: Since, micropellet particles and EDCs cannot be removed completely from the aquatic environment; reduction of impending hazards ought to rely on curtailing disposal of plastic materials and sensitizing the populace on general disposal methods in order to minimize interaction of plastic particles with EDCs which are likely to pose significant effects on aquatic fauna.

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Relative acute toxicity of cigarette butts leachate, antioxidant biomarkers; superoxide dismutase (SOD), catalase (CAT), gluthathione (GSH)activity and lipid peroxidation (LPO

Bioaccumulation of Polybrominated Diphenyl Ethers (PBDEs) was investigated in sediment and tissues of the Oyster (Crassostrea tulipa) from Unilag Lagoon Front, Makoko and Oworonshoki sampling stations within the Lagos Lagoon, Nigeria using Gas Chromatography coupled with Electron Capture Detector (GC-ECD). The samples collected were analyzed for PBDEs congeners of BDE 28, 47, 99, 100, 153, 154, 183 and 209. The results of the mean concentration of PBDE congeners detected in sediment and Oyster tissue were BDE 28, 47,183 and BDE 28, 47, 153 respectively, in all sampled stations, which was significantly higher (P < 0.05) comparing with Canadian Federal Environmental Quality Guidelines for PBDEs. Oworonshoki station had the highest concentration of total PBDEs (600.07 ng/g dry weight) while Unilag (386.43 ng/g dry weight) had the least concentration. BDE 28 was detected highest in all stations while congener BDE 183 was lowest in concentration. BDE 28 (70%) was the only congener distributed in the Oyster and sediment samples collected from all the stations and was significantly higher when compared with the Federal Environmental Quality Guidelines for PBDEs. Total PBDE concentration in Oysters showed that Oworonshoki had the highest concentration (615.44 ng/g) while Makoko showed the least (336.22 ng/g). The Biota Sediment Accumulation Factors for BDE 28 (1.181) and BDE 47 (4.990) were greater than 1, an indication of bioaccumulation. The present study established a reflection of the environmental health of the selected sampled areas and therefore, a useful tool for monitoring of PBDEs pollution.