March 2007

Determination of some trace metal levels in Asa river using AAS and XRF techniques

The determination of Fe, Mn, Pb, Zn, Cr and Cu concentrations in Asa River using Atomic Absorption Spectrophotometery (AAS) and X – ray fluorescence (XRF) is discussed. Statistical analysis showed there was no significant difference in the concentrations of Cr, Zn, Pb and Cu using the two techniques but significant differences were observed at 5% probability level for Mn and Fe. This was attributed to differences...

Author(s): Eletta O. A. A.

March 2007

Characterization and physicochemical treatment of wastewater from rubber processing factory

Wastewater collected from rubber processing factory was characterized for their pollution characteristic. Results of the analysis show that the total solids, TS, suspended solid, SS and dissolve solid, DS, were 1528.5, 1078.5 and 450 mg/l respectively, the turbidity was 702 FTU. These values are high when compared to Federal Environmental Protection Agency (FEPA) effluent discharge standard for industrial wastewater....

Author(s): Asia, I. O. and Akporhonor, E. E. 

March 2007

Spectrophotometric study of the solution interactions between riboflavin, sodium salicylate and caffeine

The self-association of Vitamin B2 (Riboflavin, RBF) and its hetero-association with Sodium Salicylate (NAS) and Caffeine (CAF) have been studied in aqueous solution by UV-Vis spectrophotometry. Using modified Benesi-Hildebrand approach equilibrium hetero-association constants were obtained for RBF-NAS [K = (25 ± 4) M-1] and RBF-CAF [K = (69 ± 4) M-1] systems at T = 298K....

Author(s): Bolotin P. A., Baranovsky S. F., Chernyshev D. N. and Evstigneev M. P.

March 2007

Photocatalytic degradation of methyl orange in aqueous TiO2 under different solar irradiation sources

The main causes of surface water and groundwater contamination are industrial discharges. Updating the field of polluted water treatment by photochemical technique has led to an important in oxidative degradation processes applying solar photochemical methods using crystal TiO2 as a catalyst. Photocatalytic oxidation of methyl orange dye under different irradiation sources (Halogen lamp 1000 W, fluorescent lamp and...

Author(s): M. N. Rashed and A. A. El-Amin