Radionuclide contents in sediment and seafood from Makoko Lagoon, Lagos State, Nigeria

Sediment and seafood samples were collected from Makoko Lagoon, Lagos state, Nigeria. Gamma-ray spectrometry was used to determine the activity concentrations of 40K, 226Ra and 232Th in the samples. The average activity concentrations of 40K, 226Ra and 232Th in the sediment were 41.04 ± 6.41, 10.15 ...

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Veröffentlicht in:Marine pollution bulletin 2023-07, Vol.192, p.114992-114992, Article 114992
Hauptverfasser: Jibiri, Nnamdi Norbert, Ugbechie, Andrew, Sowunmi, Akindayo Abiodun, Akomolafe, Idowu Richard
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container_title Marine pollution bulletin
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Ugbechie, Andrew
Sowunmi, Akindayo Abiodun
Akomolafe, Idowu Richard
description Sediment and seafood samples were collected from Makoko Lagoon, Lagos state, Nigeria. Gamma-ray spectrometry was used to determine the activity concentrations of 40K, 226Ra and 232Th in the samples. The average activity concentrations of 40K, 226Ra and 232Th in the sediment were 41.04 ± 6.41, 10.15 ± 3.19 and 4.39 ± 2.10 Bq kg−1, respectively, while the annual effective dose was 0.01 mSv/year. In seafood, the average activity concentrations of 40K, 226Ra and 232Th were 15.66 ± 8.07, 1.72 ± 1.51 and 1.93 ± 0.30 Bq kg−1, respectively. The cumulative effective ingestion dose obtained ranged from 0.016 μSv/year (giant prawn) to 1.08 μSv/year (Parrotgrunt). The mean activity concentrations and absorbed dose rate in sediment were below the worldwide average values. The cumulative dose from the ingestion of seafood was also significantly low. Sediment and seafood from the lagoon in Makoko pose no health risk from a radiological point of view to the population. •Radioactivity measurement and radiological safety level of sediment and seafood from Makoko Lagoon were carried out.•Baseline data of activity concentrations of radionuclides in the sediment samples of Makoko Lagoon was established.•The cumulative dose from the ingestion of seafood is significantly low when compared with the recommended dose level.•Seafood from Makoko Lagoon is radiologically free and safe for human consumption.•Sediments of the Makoko Lagoon pose no health risk from a radiological point of view.
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Gamma-ray spectrometry was used to determine the activity concentrations of 40K, 226Ra and 232Th in the samples. The average activity concentrations of 40K, 226Ra and 232Th in the sediment were 41.04 ± 6.41, 10.15 ± 3.19 and 4.39 ± 2.10 Bq kg−1, respectively, while the annual effective dose was 0.01 mSv/year. In seafood, the average activity concentrations of 40K, 226Ra and 232Th were 15.66 ± 8.07, 1.72 ± 1.51 and 1.93 ± 0.30 Bq kg−1, respectively. The cumulative effective ingestion dose obtained ranged from 0.016 μSv/year (giant prawn) to 1.08 μSv/year (Parrotgrunt). The mean activity concentrations and absorbed dose rate in sediment were below the worldwide average values. The cumulative dose from the ingestion of seafood was also significantly low. 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Gamma-ray spectrometry was used to determine the activity concentrations of 40K, 226Ra and 232Th in the samples. The average activity concentrations of 40K, 226Ra and 232Th in the sediment were 41.04 ± 6.41, 10.15 ± 3.19 and 4.39 ± 2.10 Bq kg−1, respectively, while the annual effective dose was 0.01 mSv/year. In seafood, the average activity concentrations of 40K, 226Ra and 232Th were 15.66 ± 8.07, 1.72 ± 1.51 and 1.93 ± 0.30 Bq kg−1, respectively. The cumulative effective ingestion dose obtained ranged from 0.016 μSv/year (giant prawn) to 1.08 μSv/year (Parrotgrunt). The mean activity concentrations and absorbed dose rate in sediment were below the worldwide average values. The cumulative dose from the ingestion of seafood was also significantly low. 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Gamma-ray spectrometry was used to determine the activity concentrations of 40K, 226Ra and 232Th in the samples. The average activity concentrations of 40K, 226Ra and 232Th in the sediment were 41.04 ± 6.41, 10.15 ± 3.19 and 4.39 ± 2.10 Bq kg−1, respectively, while the annual effective dose was 0.01 mSv/year. In seafood, the average activity concentrations of 40K, 226Ra and 232Th were 15.66 ± 8.07, 1.72 ± 1.51 and 1.93 ± 0.30 Bq kg−1, respectively. The cumulative effective ingestion dose obtained ranged from 0.016 μSv/year (giant prawn) to 1.08 μSv/year (Parrotgrunt). The mean activity concentrations and absorbed dose rate in sediment were below the worldwide average values. The cumulative dose from the ingestion of seafood was also significantly low. Sediment and seafood from the lagoon in Makoko pose no health risk from a radiological point of view to the population. •Radioactivity measurement and radiological safety level of sediment and seafood from Makoko Lagoon were carried out.•Baseline data of activity concentrations of radionuclides in the sediment samples of Makoko Lagoon was established.•The cumulative dose from the ingestion of seafood is significantly low when compared with the recommended dose level.•Seafood from Makoko Lagoon is radiologically free and safe for human consumption.•Sediments of the Makoko Lagoon pose no health risk from a radiological point of view.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>37182242</pmid><doi>10.1016/j.marpolbul.2023.114992</doi><tpages>1</tpages></addata></record>
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subjects Ingestion dose
Lagoon
Lagos
Nigeria
Radiation Monitoring - methods
Radioisotopes - analysis
Radionuclide
Seafood
Seafood - analysis
Sediment
Soil Pollutants, Radioactive - analysis
Spectrometry, Gamma
title Radionuclide contents in sediment and seafood from Makoko Lagoon, Lagos State, Nigeria
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