Radiation Doses in Fishing Water and Coast Soil in Lagos State South West Nigeria

Abstract

Kayode Idowu Ogungbemi*, Williams Igoniye ; Ibitoye Ayo Zaccheaus; Margret Abosede. Adedokun, Olusola Olurotimi Oyebola

This study investigated the radionuclide concentrations in soils and waters of the Coastline and some selected aquatic commonly consumed in this area. Radioactivity levels were evaluated in their natural occurrences in the samples of water, soil and selected aquatic life from three different locations in the Mainland part of Lagos State (Makoko, University of Lagos waterfront and Bariga). Canberra High Purity Germanium Gamma spectrometer was used for the detection of radionuclides and determines the activity. The activity concentrations of Pb-214, Pb-212, Cs-134, and K-40 in the Soil samples of Makoko were found to be 7.89±0.51, 10.20±1.21, 0.69±0.10 and 67.37±2.52 Bq/kg, respectively. From the University of Lagos waterfront, the concentrations of the Soil samples were found to be 8.22±0.51 Bq/kg for Pb-214, 10.54±1.19 Bq/kg for Pb-212, 0.57±0.15 for Cs-134. For the selected Aquatic life (Tilapia Fish, Cat Fish and Crab) from these three locations of interest. The concentrations of K-40 ; Pb-
214;Pb-212 Cd-113; Ni-59 in Tilapia fish from Makoko water body was 24.63 Bq\Kg; 0.568 Bq\Kg; 0.07 Bq\Kg; 0.16 Bq\Kg and ;1.65Bq\Kg , respectively. However recorded concentrations at the Makoko Catfish forK-40; Pb-214; Pb-212; Cd-113 and Ni-59 were11.75 Bq\Kg; 0.20 Bq\Kg; 0.04Bq\Kg;0.13Bq\Kg and 1.05Bq\Kg, respectively. The activity concentration showed insignificant values in the three locations based on Nigerian Basic Ionizing Radiation Regulation 2003, UNSCEAR 2008, ICRP 1983, and IAEA 2011 standards.