No abstract

This study measured the concentrations of toxic carcinogenic and non-carcinogenic elements present in groundwater using Inductively Coupled-Plasma Mass Spectrometry (ICP-MS). The concentration values obtained were used to calculate the life average daily dose (LADD) exposure of the people whom rely on groundwater for consumption in Abuja, Nigeria. The highest LADD for the carcinogenic toxic element chromium (Cr) was 2.7 x 10 -5 μg kg -1 day -1 , whereas it was 3.3 x 10 -4 μg kg -1 day -1 for the non-carcinogenic toxic element lead (Pb), identified in water samples collected by the Water Board. These LADD magnitudes of 10 -5 and 10 -4 for both carcinogenic and noncarcinogenic toxic elements in groundwater are far below the International Reference Dose according to the United States Environmental Protection Agency (USEPA) in 2008, which has a value of 10 -1 . The low magnitudes found in water samples may not pose significant health risks to the local population. The relevant authorities should, therefore, continue to monitor the impact of human activities on metal pollution in this area and take effective measures to control contamination of the public water supply.

No abstract

226 Ra concentrations were studied to represent the radiological risk of groundwater of the Giri and Kuje areas of Abuja, North-Central Nigeria. Two borehole water samples were collected from the Giri and Kuje areas of Abuja with a hand-dug well and Abuja Water Board as control. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to measure the concentrations of radionuclide of 226 Ra exposed to the dwellers. The activity concentrations of 226 R in groundwater supplies for drinking and domestic purposes ranges from 443 �Bq L -q to 849 �Bq L -1 , with the highest value of 849 �Bq L -1found at the Kuje borehole; the lowest value of 443 �Bq L -q was reported at the Giri borehole. This higher activity value found at the Kuje borehole may be attributed to a basaltic dyke intrusion that outcrops in the region which is used for a quarry. The concentration was used to calculate the Life Average Daily Dose of 226 Ra individuals collected in the area, which was estimated to be 5.0 × 10 -3 μg kg -k day -d and was found to be lower than the International Reference Level. This present study recommends further research on 226 Ra levels and exposure to inhabitants via groundwater for a comprehensive conclusion to be drawn for future toxicity and toxicological health-related diseases.