Measurement of Metals and Radionuclide Concentrations of Water for Domestic and Other Purposes in Ozoro, Delta State, Nigeria [ READ ]
K. Emumejaye and J.O.Ekibade
A survey of radionuclide concentrations in the various sources of water for domestic `and other purposes (like poultry, fish farming, recreation etc.) of the crude oil producing community of Ozoro, Delta State, Nigeria was carried out using a high purity germanium (HPGe) detector and atomic absorption spectrophotometer (heavy metals). The study area was divided into three sections for the purpose of sample collection namely; Okpaile, Polytechnic environs and NDC. Samples of well-water, rain and bore-hole water were collected from these areas and analyzed for heavy metals and radioactivity concentrations. The results indicated that values for 40K in Bq/l ranged from 12.68 – 769.68, 232Th < 0.12 – 3.38 and 0.62 – 1.48 of 238U. Annual effective doses computed from measured concentrations showed low values: 0.03 – 1.74 for K-40; 0.16 – 0.37 for Th – 232 and 0.01- 0.34 for U – 238 in mSv/y. For lead (Pb) (0.181 – 0.245 mg/l), copper (0.000 to 0.007 mg/l) Zinc (0.001 to 019gm/l), Nickel (0.1-0.13mg/l), iron (0.02 – 1.42mg/l) manganese (0.008 – 0.032 mg/l) and cadmium below detection limit. Some of these concentration levels in samples from Okpaile for both well and rain water are above World Health Organization (WHO) maximum permissible limits for Pd and Fe. The general results showed that water in the study area had acceptable quality for domestic utilization except the ones that contain excess lead and iron which may require treatment.
K. Emumejaye and J.O.Ekibade
A survey of radionuclide concentrations in the various sources of water for domestic `and other purposes (like poultry, fish farming, recreation etc.) of the crude oil producing community of Ozoro, Delta State, Nigeria was carried out using a high purity germanium (HPGe) detector and atomic absorption spectrophotometer (heavy metals). The study area was divided into three sections for the purpose of sample collection namely; Okpaile, Polytechnic environs and NDC. Samples of well-water, rain and bore-hole water were collected from these areas and analyzed for heavy metals and radioactivity concentrations. The results indicated that values for 40K in Bq/l ranged from 12.68 – 769.68, 232Th < 0.12 – 3.38 and 0.62 – 1.48 of 238U. Annual effective doses computed from measured concentrations showed low values: 0.03 – 1.74 for K-40; 0.16 – 0.37 for Th – 232 and 0.01- 0.34 for U – 238 in mSv/y. For lead (Pb) (0.181 – 0.245 mg/l), copper (0.000 to 0.007 mg/l) Zinc (0.001 to 019gm/l), Nickel (0.1-0.13mg/l), iron (0.02 – 1.42mg/l) manganese (0.008 – 0.032 mg/l) and cadmium below detection limit. Some of these concentration levels in samples from Okpaile for both well and rain water are above World Health Organization (WHO) maximum permissible limits for Pd and Fe. The general results showed that water in the study area had acceptable quality for domestic utilization except the ones that contain excess lead and iron which may require treatment.
