Heavy Metals Levels in Forage Grasses, Leachate and Lactating Cows Reared around Lead Slag Dumpsites in Nigeria
(ندگان)پدیدآور
Ogundiran, M.B.Ogundele, D.T.Afolayan, P.G.Osibanjo, O.نوع مدرک
TextOriginal Research Paper
زبان مدرک
Englishچکیده
A field study was conducted around Pb slag contaminated sites in Ibadan, Nigeria to assess theintake of trace metals by cows reared around the contaminated sites as indication of heavy metals contamination.Levels of Pb, Cd, Cu and Zn in blood, milk and faeces were determined in 20 cows exposed to the sites and 20reference cows from uncontaminated areas. Chemical analysis of pasture grasses and leachate from thecontaminated sites showed high levels of Pb. Range and mean levels of Pb, Cd, Cu and Zn in the forage grassesare: 209-899 (425 ± 79.0), ND-1.87 (0.94 ± 0.23), 4.01-8.78 (6.26 ± 0.62) and 17.4-202 (79.2 ± 23.5) mg/kgrespectively. The mean values of 8.81±0.06, 0.041±0.003, 0.20±0.01 and 1.00±0.004 mg/L were obtained l forleachate Pb, Cd, Cu and Zn. Difference in blood and milk Pb was highly significant (pgroups of animals. Mean, median and range blood Pb concentration of 349±82.0, 312, concentrations of 347 ± 144, 313, mg/kg were found in test animals whereas Pb was not detected in the tissues of the control animals. Analysesof blood, milk and faeces were found to be good indicators of environmental exposure to Pb. Test cowsaccumulated significantly higher levels of Zn in milk than in blood. Reverse is the case for Pb and Cu. The highconcentration of Pb detected in both environmental and biological samples implies the need for sound managementof hazardous waste.
کلید واژگان
Lead slagHeavy metals
lactating cows
Forage grasses
leachate
شماره نشریه
3تاریخ نشر
2012-06-011391-03-12
ناشر
University of Tehran/Springerسازمان پدید آورنده
Analytical/Environmental Unit, Department of Chemistry, University of Ibadan, Ibadan, NigeriaAnalytical/Environmental Unit, Department of Chemistry, University of Ibadan, Ibadan, Nigeria
Analytical/Environmental Unit, Department of Chemistry, University of Ibadan, Ibadan, Nigeria
Analytical/Environmental Unit, Department of Chemistry, University of Ibadan, Ibadan, Nigeria
شاپا
1735-68652008-2304