Water quality assessment in Akpabuyo, Cross River basin, South-Eastern Nigeria |
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Authors: | O E Offiong A E Edet |
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Institution: | (1) Department of Chemistry, University of Calabar, Nigeria, NG;(2) Department of Geology, P. O. Box 36 09, University of Calabar, Calabar, Nigeria, NG |
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Abstract: | A baseline study involving analyses of surface and subsurface water samples from the Akpabuyo area was carried out in order
to assess their suitability for drinking, domestic and agricultural purposes. Study results show that the waters are acidic
(3.41≤pH≤6.28), soft (hardness 2.09–10.68 mg/l as CaCO3), fresh (conductivity <1400 μs/cm) and characterised by low sodium adsorption ratio, SAR (0.08–0.59). In addition, the mean
values of the major cations (Ca2+, Mg2+, Na+, K+) and anions (SO4
2–, Cl–, HCO3
–) are all within the World Health Organisation (WHO) standards. Taking all this into consideration (except pH), the waters
may be regarded as excellent for drinking, domestic and agricultural purposes. On the basis of regression equations, the major
cations (K, Na, Ca, Mg) correlate well with conductivity. Finally, results also show that four chemical facies are delineated.
These include Ca-Cl, Na-Cl, Ca-SO4 and Ca-HCO3.
Received: 19 June 1996 / Accepted: 15 April 1997 |
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Keywords: | Water quality assessment Akpabuyo Nigeria |
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