Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by J.C. Akan
Total Records ( 5 ) for J.C. Akan
  E.I. Uwah , J.C. Akan , E.A. Moses , J. Abah and V.O. Ogugbuaja
  Levels of nitrate, nitrite, phosphate and sulphate concentrations of edible parts of some fresh vegetable samples obtained from Alau dam and Gongula in Maiduguri, Borno State, Nigeria were determined. The anions were determined from samples of spinach, lettuce, cabbage, carrot, onion, tomato, beans, groundnut and garlic during their harvesting stages. The anions were determined by Uv-Visible spectrophotometry. The results showed no significant difference between anion levels in vegetable from the two sampling areas p< 0.05. The values obtained were below the tolerance levels recommended by World Health Organization (WHO). Therefore, the consumption of these vegetables as food does not pose health hazard to human and animal as a result of these anions.
  J.C. Akan , F.I. Abdulrahman , J.T. Ayodele and V.O. Ogugbuaja
  Levels of Copper (Cu), Cobalt (Co), Zinc (Zn), Iron (Fe), Lead (Pb), Manganese (Mn), Chromium (Cr), as well as pH, redox potential (Eh), Dissolved Oxygen (DO), Total Dissolved Solid (TDS), temperature, nitrate, sulphate and phosphate were determined in River Challawa, Kaon State, Nigeria. These parameters were simultaneously monitored. Physio-chemical examination revealed that the levels of pH (6.81±0.10 and 10.23±0.32 mg L 1), Eh (-46.31.34 to -87.21.54m/v), TDS (40.33.24 to 70.18.40 mg L 1), temperature (8.20.14 to 12.80.24 C), sulphate (22.60.21 to 43.50.31 mg L 1) and nitrate (1.110.02 to 4.040.03 mg L 1) were below the maximum permissible limits set by WHO and FEPA for drinking water and aquatic ecosystem. Concentration of heavy metals; Cu, Co, Zn, Fe, Pb, Mn and Cr were significantly above the maximum allowable levels set by United State Environmental Protection Agency (USEPA) and WHO levels for drinking water and for protection of aquatic ecosystem. The levels of DO and phosphate in the water samples exceeded the Nigeria Federal Environmental Protection Agency (NFEPA) tolerance limits for drinking water and water meant for domestic uses. This may have deleterious effect on aquatic ecosystem and the health of the rural dweller that use the river water directly for domestic purposes without treatment.
  G.A. Dimari , F.I. Abdulrahman , J.C. Akan and V.O. Ogugbuaja
  Atmospheric air was collected using Absorption train method from Shukwari Ward of Maiduguri Metropolis, Nigeria between the periods of January to December, 2004 and was analyzed for nitrogen dioxide by colorimetric method. The sulphur dioxide ranged from 0.321-0.078082 g m 3. for day times hours (8:00am-5:0pm), while for night times it could also be observed that concentrations between the soft hours of 1:00-3:00 am were relatively stable for the period of analysis with the exception of December, May and June, 2004. The mean day times concentrations with error bars of NO2 ranged from 0.253 0.101-0.159 0.082 g m 3. The highest mean concentration was determined in March while the lowest was observed in December, 2004. The highest night time concentration peaked in June while the lowest was determined in November. Statistical data handling by regression analysis (p< 0.05) of day and night concentrations of NO2 showed no correlation (r = 0.4). From the results, the concentration of NO2 was within the World Health Organization and other national guideline values for clean air.
  J.C. Akan , V.O. Ogugbuaja , F.I. Abdulrahman and J.T. Ayodele
  Concentration of dissolved copper (Cu), cobalt (Co), zinc (Zn), iron (Fe), lead (Pb), manganese (Mn), chromium (Cr), as well as pH, redox potential (Eh), dissolved oxygen (DO), Total Dissolved Solid (TDS), temperature, nitrate, sulphate and phosphate were determined in River Challawa and tap water from Challawa, Sharada and Bompai industrial areas, Kano State, Nigeria. Samples were collected for a period fifteen weeks. River Challawa is the main water supply source for Kano town and numerous industries within this area. Apart from being a source of water supply, it serves as a sink for industrial and municipal wastes. These parameters were simultaneously monitored. Physico-chemical examination revealed that the levels of pH (6.81±0.10 to 10.23±0.32), Eh (-46.3±1.34 to -87.2±1.54 mV), TDS (40.3±3.24 to 70.1±8.40 mg L-1), temperature (8.2±0.14 to 12.8±0.24°C), sulphate (22.6±0.21 to 43.5±0.31 mg L-1) and nitrate (1.11±0.02 to 4.04±0.03 mg L-1) in River Challawa and tap water from Challawa, Sharada and Bompai industrial areas were below the maximum permissible limits set by WHO and Federal Environmental Protection Agency (FEPA) Nigeria for drinking water and aquatic ecosystem. Concentration of heavy metals; Cu, Co, Zn, Fe, Pb, Mn and Cr in River Challawa were significantly above the maximum allowable levels set by United State Environmental Protection Agency (USEPA) and WHO levels for drinking water and for protection of aquatic ecosystem, while for tap water the concentration of heavy metals were within safe limits. The levels of DO and phosphate in River Challawa exceeded the FEPA tolerance limits for drinking water and water meant for domestic uses. This may have deleterious effect on aquatic ecosystem and the health of the rural dwellers that use the river water directly for domestic purposes without treatment.
  M.Y. Mahre , J.C. Akan , E.A. Moses and V.O. Ogugbuaja
  The aim of this study is to determine pollutant indicators in River Kaduna, Kaduna State Nigeria. Water and Sediment samples from River Kaduna, Nigeria were collected and analyzed for pH, temperature, total dissolved solid, phosphate, nitrate, sulphate and the organic pollution indicators. These include Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) content of the water samples and Total Organic Carbon (TOC) of the sediment samples. The water and sediment samples were also analyzed for the following metal contents, As, Cd, Cr, Cu, Fe, Mn, Pb and Zn using Atomic Absorption Spectrophotometer (Unicam, Model, SOLAAR 969), while Hg was determined using cold vapour Atomic Absorption Spectrophotometer model AA-670. Organic pollutants were analyst using standard procedure. Correlation coefficients of organo-pollutants with each metal determined were used to establish the relationships between the metals and the organic pollution indicators, notably COD, BOD5 and % TOC. The metal levels correlated highly with BOD, COD and %TOC, which indicate the ability of the organo-pollutants to scavenge the metal ions. The levels of metals found in water samples varied from 0.04-0.29 mg L-1 for Mn, 0.05-0.32 mg L-1 for Cu, 0.10-3.62 mg L-1 for As, 0.08-0.10 mg L-1 for Cd, 0.22-1.10 mg L-1 for Fe, 0.25-0.70 mg L-1 for Zn, 1.72-2.50 mg L-1 for Hg and 0.50-0.90 mg L-1 for Pb. From the results, the concentration of heavy metals in water and sediment samples, BOD and COD were found to be above the recommended permissible limits set by Federal Environmental Protection Agency (FEPA) Nigeria, World Health Organization (WHO)/European Union (EU). It is inevitable that protective measurement must be started very soon as this may have deleterious effect on aquatic ecosystem and the health of the rural dwellers that use the river water directly for domestic purposes without treatment.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility