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Articles by G.A. Dimari
Total Records ( 2 ) for G.A. Dimari
  G.A. Dimari , F.I. Abdulrahman , J.C. Akan and S.T. Garba
  An analysis of intestine, liver, stomach and gill tissue concentrations of heavy metals (Cu, Co, Pb, Cr, Mn, Fe, Ni, Cd and Zn) in three commercially important fish species (Tilapia gallier, Crarias lazera and Osteoglossidae. caught within Alau Dam between the periods of January to August, 2007. These heavy metals were determined using Perkin-Elmer AAnalyst 300 Atomic Absorption Spectroscopy (AAS). Heavy metals contents varied significantly (p>0.05) depending on the fish species and on the types of tissues. The concentration of heavy metals in livers and gills tissue were relatively higher than the intestine and stomach tissues of the three species. The distribution of copper and cobalt were in the order of gills>stomach>liver>intestine in the entire fish samples, while the distribution of (Pb, Cr, Mn, Fe, Ni, Cd and Zn) were in the order of liver>gills>stomach>intestine. The concentrations of the entire elements in the three species were within tolerance limits that are safe for human consumption, with exception of lead in gills.
  G.A. Dimari , F.I. Abdulrahman , J.C. Akan and V.O. Ogugbuaja
  Total suspended particulate matter was collected using SKC side kick sampling pump method from Shukwari Ward of Maiduguri Metropolis, Nigeria between the periods of January to December, 2004 and was analyzed for 13 elements by Atomic Absorption Spectrophotometric (AAS) method. The concentrations of the elements in the entire quarter range from 0.02-5.12 μg m-3. The highest elemental concentrations were observed in the order second quarter (April-June) >first quarter (January-March) >forth quarter (October-December) >third quarter (July-September). The results showed that the concentration of Na, Zn and Ni were highest in the suspended particulate matter, while Cr, Mn and Mg were low. Significant positive linear correlation coefficients among elements in the suspended particulate matter were established, indicating common sources of heavy metal pollution. The concentration of SO4-2- ranged from 250 to 312.50 μg m-3 while NO3- ranged from 9900.00 to 15033.33 μg m-3. The concentrations of the elements, SO42- and NO3 in the suspended particulate matter exceeded the limits set by WHO and FEPA.
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