scholarly journals Micropellet Particles: A Vector of Hydrophobic Endocrine Disrupting Chemicals in Lagos Lagoon

2019 ◽  
pp. 1-14
Author(s):  
Olushola A. Abiodun ◽  
Fidelia I. Osuala ◽  
Adebayo A. Otitoloju ◽  
Carine M. D. Fotsing3 ◽  
Derek T. Ndinteh
Keyword(s):  
Aquatic Environment ◽  
Endocrine Disrupting Chemicals ◽  
Aquatic Organisms ◽  
Sampling Station ◽  
Flame Ionization ◽  
Plastic Materials ◽  
Sampling Locations ◽  
Endocrine Disrupting ◽  
Lagos Lagoon ◽  
Negative Impacts

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.

scholarly journals Partitioning, bioavailability and effects of oestrogens and xeno-oestrogens in the aquatic environment

2005 ◽  
Vol 85 (1) ◽  
pp. 1-31 ◽  
Author(s):  
W.J. Langston ◽  
G.R. Burt ◽  
B.S. Chesman ◽  
C.H. Vane
Keyword(s):  
Endocrine Disruption ◽  
Aquatic Environment ◽  
Endocrine Disrupting Chemicals ◽  
Estuarine Sediments ◽  
Food Chains ◽  
Benthic Organisms ◽  
Nonyl Phenol ◽  
Model Compounds ◽  
Endocrine Disrupting

This review provides insights into the distribution and impact of oestrogens and xeno-oestrogens in the aquatic environment and highlights some significant knowledge gaps in our understanding of endocrine disrupting chemicals. Key areas of uncertainty in the assessment of risk include the role of estuarine sediments in mediating the fate and bioavailability of environmental (xeno)oestrogens (notably their transfer to benthic organisms and estuarine food chains), together with evidence for endocrine disruption in invertebrate populations.Emphasis is placed on using published information to interpret the behaviour and effects of a small number of ‘model compounds’ thought to contribute to oestrogenic effects in nature; namely, the natural steroid 17β-oestradiol (E2) and the synthetic hormone 17α-ethinyloestradiol (EE2), together with the alkylphenols octyl- and nonyl-phenol (OP, NP) as oestrogen mimics. Individual sections of the review are devoted to sources and concentrations of (xeno)oestrogens in waterways, sediment partitioning and persistence, bioaccumulation rates and routes, assays and biomarkers of oestrogenicity, and, finally, a synopsis of reproductive and ecological effects in aquatic species.

scholarly journals The utilization of the freshwater invertebrates hyalella azteca and daphnia magna for use in assessing potential endocrine distruption in aquatic systems

2021 ◽  
Author(s):  
Sean Doobay
Keyword(s):  
Daphnia Magna ◽  
Morphological Changes ◽  
Endocrine Disrupting Chemicals ◽  
Aquatic Organisms ◽  
Hyalella Azteca ◽  
Sexual Cycle ◽  
Screening Assay ◽  
Endocrine Disrupting ◽  
And Gender ◽  
Endocrine Distruption

The chronic physiological effects of the compounds Atrazine, Tributyltin and 17 α-ethinylestradiol were tested on the freshwater aquatic organisms; Hyalella azteca and Daphnia magna. Daphnia magna were exposed to a series of conditions designed to minimize the parthenogenetic cycle of and maximize the sexual cycle resulting in the formation of males and ephippia to be used as a screening assay for potentially endocrine disrupting chemicals. Hyalella azteca were exposed to the three contaminants during a 42-day chronic toxicity assay and analyzed for morphological changes to male secondary gnathopods, female brood pouches and gender ratios. It was found that atrazine, tributyltin and 17 α-ethinylestradiol had no significant effects on the gender ratios or secondary sexual physiology of Hylalla azteca.

scholarly journals Distribution and bioaccumulation of Endocrine Disrupting Chemicals (EDCS) in Lagos Lagoon water, sediment and fish

2020 ◽  
Vol 22 (2) ◽  
pp. 057-074 ◽  
Author(s):  
A.A. Adeyi
Keyword(s):  
Aquatic Ecosystems ◽  
Endocrine Disrupting Chemicals ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Contaminants ◽  
Sediment Samples ◽  
Lagoon Water ◽  
Fish Samples ◽  
Endocrine Disrupting ◽  
Lagos Lagoon ◽  
Pre Treatment

Toxic chemical contaminants released from industrial, agricultural, and municipal sources continues to threaten aquatic ecosystems. Aquatic  ecosystems act as the final sinks accumulating and transporting numerous chemicals such as octylphenol (OP), nonylphenol (NP) and bisphenol-A (BPA). These chemicals are undesirable as they have been reported to possess endocrine disrupting properties. This study therefore assessesthe distribution and bioaccumulation of endocrine disrupting chemicals (EDCs) in Lagos Lagoon. Water and sediment samples were collected at nine different locations on the lagoon. Five different species of fishes were also collected, identified and homogenized prior to sample pre-treatment. Samples were extracted, clean-up, derivatized and analysed by gas chromatography–mass spectrometry. Physicochemical properties of  the samples were also determined. In the water samples, BPA was not detected in all the samples collected at the different locations while the concentrations of NP and OP ranged from ND-102 ng/L and ND-127 ng/L, respectively. The concentrations of the targeted compounds in the sediment samples ranged from ND- 5.08 μg/g BPA, ND-1.90 μg/g NP, and ND- 2.51 μg/g OP while the concentrations ranged from ND-1139 ng/g BPA, ND-476 ng/g NP, and ND-643 ng/g OP in the fish samples. This study revealed the occurrence of EDCs in Lagos lagoon water and their  accumulation in biota therein, which can have detrimental effects on other organisms across the food chain. Thus, the need to monitor these endocrine disrupting chemicals is imperative. Keywords: EDCs; BPA; OP; NP; Lagos lagoon

scholarly journals Effects of Endocrine Disrupting Chemicals on Aquatic Organisms

1998 ◽  
Vol 64 (5) ◽  
pp. 898-898 ◽  
Author(s):  
Yuji Oshima ◽  
Shinsuke Tanabe ◽  
Shinya Hashimoto ◽  
Toshihiro Horiguchi
Keyword(s):  
Endocrine Disrupting Chemicals ◽  
Aquatic Organisms ◽  
Endocrine Disrupting
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