Comparative Assessement Of Heavy Metal Levels In Soil, Vegetables And Urban Grey Waste Water Used For Irrigation In Yola And Kano

Published on Jan 1, 2014
Hymore F. K1
Estimated H-index: 1
Abstract
The heavy metal levels in grey waste water, soil and vegetables from urban irrigation sites of Yola and Kano were investigated. The concentrations in the irrigation waters are above the maximum permissible levels of 0.5 µg/ml, 0.2 µg/ml, 0.2 µg/ml and 0.017 µg/ml for Fe, Zn, Mn and Cu respectively for irrigation waters used on all types of soils. The concentrations of Cu in all the farm soils are above the maximum permissible level in soils. The Kano farm soils showed higher levels of heavy metal soil contamination compared to Yola farm soils. The extent of metal in irrigation waters and farm soils from the two study areas ranged from very severe pollution to excessive pollution and slight contamination to severe pollutions respectively. The heavy metals also showed similar distribution pattern in parts of the same species of vegetables from both sites. Hence higher concentrations were observed in vegetable parts from the Kano sites compared to those from Yola sites.
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