Browsing by Author "Elueze, A. A."

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"Geoenvironmental assessment of the environs of the Aluminium Smelting Company in Ikot Ahasi, southeastern Nigeria "
(Nigerian Mining and Geosciences Society, 2009) Elueze, A. A.; Ekwere A. S.; Nton, M.E.
" The Aluminium Smelting Company, located in Ikot Abasi area, lies within the dominantly clastic rocks of the Benin Formation of the eastern Niger Delta. In order to evaluate the level of environmental contamination associated with this major industrial project, concentrations of trace elements and major elements in representative samples of soil, stream sediments and water in the vicinity of the industrial complex were determined by ICP-OES (for soil and stream sediments) and Atomic Absorption Spectrophotometer (AAS) (for water). Samples from a control site, about 3km from the complex were also collected and analyzed for the same set of elements, Results revealed that concentrations of all the elements in the sampled materials were within background levels in comparison with those from the control site. The trace and major element variations show some slight decreasing concentration with increase distance from the factory site for mostly Pb, Zn Cu, Ni for the trace elements and Ca for the major element. There is no significant variation in the soil profile with depth for the elements. Generally, concentration of elements is in the order: Zn>Pb>Ni>Cu and Fe>Al>Ca>Mg>Na>K for the trace and major elements respectively. Computation of geo-accumulation index for the soils revealed no secondary enrichment. Application of R-mode factor analysis shows four groupings, reflecting lithological and environmental controls. The stream sediments show generally low concentrations that fall within the concentration range of sediments of similar provenance elsewhere. Metal concentration levels in the water show higher values for the surface water. Both hydrophysical and chemical parameters have slight elevated values when compared with the control and reflect a dominant geogenic source. Generally, they lie within the ambits of the World Health Organization (WHO) Standards of water quality and pose no threat to aquatic or human community. "
Hydogeochemical assessment of surface water and ground water quality in Agbowo-Orogun area of Ibadan, southwestern Nigeria
(Bachudo Science, 2007) Nton, M. E.; Adejumo, S. A.; Elueze, A. A.
"The Agbowo-Orogun area of Ibadan, which is within the basement complex of southwestern Nigeria, is underlained by banded gneiss of the migmatites-gneiss complex. A total of thirty-five water sample, made up of thirty-two from groundwater and three from surface water, were analyzed for their physico-chemical characteristics with the aim of assessing their quality and usability. Results of some physico-chemical parameters show average values of 8.61 pH; 749 49ps/cm EC; 218 50 mg/l TDS; 84.40 turbidity; 323.14 pt/co unit colour; 54.94 mg/l Na‘; 49.75mg/l Ca2*; 28.24mg/l Mg , 23 54 mg/l K*. 1 05 mg/l Fe* 229 14 mg/l HCO; 128.23 mg/l Cl'; 14 86mg/l NO3; 7.30mg/l SO<2; 4 60 mg/l PO<3 and 1 31 mg/l F Average values of total hardness (TH) and sodium absorption ratio are 230 68 mg/l and 1 95 respectively. The relative abundance of cations is in the order of Na*>Ca2*>Mg2*>K*>Fe2* while those of anions are; HC03'>Cr>N0j'>S0«2'>P042 --F R-mode factor analysis shows five factor loadings and bi-log plots of TDS versus Na*/ (Na* ♦ Ca2*) all indicate that the bulk of the chemistry of the water is modified by weathering of the associated rocks. Six water groups were identified, based on characterization using the pipor bilinear diagram These include; Ca- (Mg)-Na- HCO3, Ca-(Mg)-Na-CI-(SO<)-HC03, Ca-(Mg)-HC03, Ca-Mg-(S04>-HC03, Ca-(Mg)-SC>4 and Na-(K)-HC03 thus reflecting diverse effects of bedrock lithologies, base exchange processes, precipitation and weathering Both water sources are in general, slightly alkaline with low to medium sodium hazards The pH, Ca2* and SO42' are within tns permissible limits of WHO standard for both water sources. Concentrations of Na*, NO3 Cl', HCO3 conductivity and TDS are higher than maximum permissible limits for the surface water and may be attributed to anthropogenic effects However it can be observed that both the groundwater and surface water sources are suitable for agricultural purposes while the groundwater in particular, is acceptable for domestic uses. "
Hydrochemical assessment of surface water in part of South-eastern Nigeria
(Mineral wealth, 2001) Elueze, A. A.; Ephraim, B. E.; Nton, M. E.
"The area of study occurs mainly within the Calabar Flank and part of the adjacent basement terrain of the Oban Massif. The latter is composed of mainly migmatitic gneisses, phyllites, amphibolites, granites, schists and granodiorites, while the major lithologies of the Calabar Flank include carbonates, shales, claystones and sandstones. This study aims at determining the quality and usability of the water, in addition to ascertaining the possible pollutants and ways to ameliorate their effects. Results of some physical and hydrochemical parameters have average values of 5.53pH, 77.4mg/I TDS, 17.8mg/l Na+, 5.5mg/l Ca2+, 13.2mg/l Cl , 3.3mg/l S042', 0.7mg/I NO'3, and 49.6ms/cm conductivity. The water hardness and sodium absorption ratio (SAR) are respectively 20.5mg/l and fi.fi. The total hardness, Ca2+, S042' are higher for the water draining the carbonate rock environs, while the TDS, Na+, conductivity and Cl"" are greater in the basement rock areas. Hydrochemical parameters in the piper trilinear diagram, as well as the Gibbs plot, respectively suggest that the water is of sodium bicarbonate facies, and dissolved solids are mostly products of weathering. Application of R-mode factor analysis suggests that the main components of the water characteristics are related to hydrological, lithological and environmental controls. The factor containing CO32- and HCO3"", is derived from the carbonate rocks in the area, whereas Na+ and K+ which are possibly transported in solution as base exchange of clay minerals, notably characterize the basement rocks. The group showing enrichment in Cl , Mg2+ and NO3 is considered to be associated with environmental control, through precipitation of meteoric water, while the presence of S042"" is linkable to the aeration of sulfide minerals in the area. On the whole, the water is slightly acidic with low sodium hazard. It therefore satisfies the World Health Organisation (WHO) standards for domestic, agricultural and other industrial uses requiring usual treatment such as filtration and disinfection."
University of Ibadan inaugural lectures: 1998 - 2002
(Ibadan University Press, 2009) Abogunrin, S. O.; Falayajo, W.; Olufemi, B. E.; Abumere, S.; Akingbala, J. O.; Malik, S. H. A.; Osonubi, O.; Ajayi, F.; Obigbesan, G. O.; Alonge, O.; Egunjobi, L.; Longe, R.; Ilevbare, J. A.; Okorie, D. A.; Adewole, I. F.; Faturoti, E. O.; Adeniyi, F. A. A.; Alabi, B.; Ojo, J. D.; Dada, A.; Oladosu, L. A.; Elueze, A. A.; Bolarinwa, A. F.; Soyanwo, O. A.; Olawoye, J. E.; Osuagwuh, A. I. A.; Ikporukpo, C. O.; Fagbenle, O.