Sediment geochronology and spatio-temporal and vertical distributions of radionuclides in the Upper Bonny Estuary (South Nigeria)

Omokheyeke, O.; Sikoki, F.D.; Laissaoui, A.; Akpuluma, D. A.; Onyagbodor, Peter Oghogho; Benkdad, Azzouz; Benmansour, M.

doi:10.2478/s13386-013-0164-z

Cited by 7 publications

(3 citation statements)

References 20 publications

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“…The aquatic environments are the ultimate receivers of spills and other discharges from oil and gas exploration and production (Joel 2010). The sediment in any aquatic environment stores pollutants which remain toxic and are released slowly over time (Omokheyeke et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

2015

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Oil and gas exploration and production in Nigeria is geared towards meeting the energy need of its populace and also generate revenue. However, oil field chemicals used in oil and gas activities are sources of environmental pollution, causing various degrees of harm especially to the aquatic components of the environment. Most ascertained detrimental effects of oil field chemicals on organisms are generally laboratory based investigations. These have not considered synergistic and antagonists effects of these chemicals under various environmental conditions on organisms and the ecosystem. A research that incorporates both field and laboratory studies to investigate the effects of oil field chemicals in the natural environment would be of great use to provide a wholistic data for scientists. Such research would consider both synergistic and/or antagonistic effects of these chemicals under the natural environment with its varing conditions. The result obtained from such study would significantly enhance -integrated catchment management (ICM), further limnological studies/assessment, information for policy redress on contamination and pollution abatement, and remedial activities to ensure a sustainable healthy environment.

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Section: Introductionmentioning

confidence: 99%

Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

2015

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“…This flooding also greatly impacts on water bodies by increasing the amount of debris from land. The social, economic, and ecological problems associated with flooding are cumbersome and detrimental [6]. Nigeria owes it as duty to be active players in all global programmes that will ensure the sustainability of our ocean and marine environment as this is in the best interest of the National and International communities.…”

Section: Introductionmentioning

confidence: 99%

Suspended Marine Litter in Akwa Ibom State, Nigeria: A Case Study of Cross River, QUA Iboe River and Jaja Creek

Babatunde¹,

Uche

2018

JGEESI

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A study of Ten coastal communities along the Cross River, Qua Iboe River and Jaja Creek (all in Akwa Ibom, Nigeria) was conducted to: Identify and Geo-reference affected navigable channels in Akwa Ibom State; create a map of affected navigable channels in the state; qualitatively and quantitatively characterize floating marine debris in affected channels; Delineate the affected channels; and create awareness among coastal communities on marine litter dangers. The data for average depth revealed that the water body in Essene had the highest depth (13m) while Ufak had the least (3m); average width was highest (850m) at Akpam Nfrugam and Enitan while the least width (250m) was recorded in Ikot Ibritan; and the average flow velocity was highest (1.1 m/s) at Akpam Nfrugam and Essene, least (0.4 m/s) at Edik Ipa and Akuakpa Urang. The result of the characterization of the suspended debris showed that the debris comprised of plastic, nylon, can, foil and "others". "Others" was made up of mainly nypa palm and unidentified objects. Nylon

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“…Anthropogenic radionuclides from atmospheric fallout have been widely used as a tracer of sedimentation processes in the Northern Hemisphere (Abril, 2003;Alhajji et al, 2014;Ketterer et al, 2004a;Omokheyeke et al, 2014;Pourcelot et al, 2003;Quinto et al, 2013;Todorović et al, 2013;Wu et al, 2011;Zheng and Yamada, 2004), and 240+239 Pu atomic ratios have been used with great success in fresh water lake studies (Cao et al, 2017;Ketterer et al, 2004a;Łokas et al, 2017;Mietelski et al, 2016a;Wu et al, 2011). Furthermore, plutonium radioisotopes ( 239+240 Pu) have been successfully used as a chronostratigraphic marker in Australia and New Zealand (Everett et al, 2008;Leslie and Hancock, 2008;Sanders et al, 2016;Tims et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

<sup>240+239</sup>Pu depositional signatures as a viable geochronological tool in the Amazon Basin

et al. 2017

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Anthropogenic radionuclide signatures associated with nuclear testing are increasingly utilized in environmental science to explore recent sedimentation. In this study, we assess the suitability of Pu radioisotope analysis in floodplain lake environments in the Amazon Basin to form geochronologies during the 20 th century. The 240 Pu + 239 Pu ( 240+239 Pu) signatures in six sediment cores indicate sediment accumulation rates in the floodplain lakes of the major rivers; Amazon (2.3 mm year -1 ), Tapajos (10.2 and 2.4 mm year -1 ) and Madeira (3.4, 4.2 and 6.2 mm year -1 ). The results from this study show that 240+239 Pu fallout activities, and the well documented ( 240 Pu/ 239 Pu) atomic ratios of the above ground nuclear tests which began in the 1950's, are sufficient and well preserved in Amazon floodplain lake sediments to infer chronologies. Lead-210 dating analyses in the same sediment cores produced comparable sediment accumulation rates at three of the six sites. The differences between dating methods may be attributed to the different time scale these dating methods represent and/or in the solubility between Pb and Pu along the sediment column. The geochronologies derived from the 240+239 Pu and 210 Pb dating methods outlined in this work are of interest to identify the effects of changing sediment accumulation rates during the previous century as a result of development, including deforestation, along the Amazon Basin which increased towards the middle of the 20 th century. This study shows that Pu dating provides a viable alternative geochronology tool for recent sediment accumulation (previous ~60 years) along the Amazon Basin.

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Sediment geochronology and spatio-temporal and vertical distributions of radionuclides in the Upper Bonny Estuary (South Nigeria)

Cited by 7 publications

References 20 publications

Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

Biological And Chemical Changes Associated With Exposure Of Cyprinid Fishes To Some Oil Field Chemicals In The Niger-Benue River System, Nigeria

Suspended Marine Litter in Akwa Ibom State, Nigeria: A Case Study of Cross River, QUA Iboe River and Jaja Creek

<sup>240+239</sup>Pu depositional signatures as a viable geochronological tool in the Amazon Basin

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