Blood lead levels in cows reared around polluted localities and its influence on milk lead levels. [Arabic]

摘要

Lead is pervasive environmental pollutant with potential public health hazard. The present study examines the blood and milk lead level in animals reared in areas around different industrial activities to determine the degree of pollutant and to find the relationship between blood and milk lead levels. The milk and blood samples (n=98) were collected from animals reared around five area, al-psateen farms near the oil refinery (horns) and al-moubarakiea near chemical fertilizer factory (horns) and heat-electricity station (hulfaia-hama) and cement factory (kafer-bu hama) and finally country of Aleppo serve as controls. Significantly (P<0.05) higher milk and blood lead levels was recorded in animals reared around al-psateen farms near the oil refinery (the average concentration 39.2-973 ppb) for milk and blood followed by al-moubarakiea near chemical fertilizer factory plant (the average concentration 24.83-868 ppb) for milk and blood followed by heat-electricity station (hufaia-hama) (the average concentration 23-830 ppb) for milk and blood followed by cement factory (kafer-bu hama) (the average concentration 19.97-823 ppb) for milk and blood and finally control group (the average concentration 17.4-737 ppb) for milk and blood. Concerning the obtained results showed high positive correlation in the same group (lead concentration increase in blood so increase in milk) the average value of this relation were 2.9%.