Metal Concentration In Vegetables Grown In Northern Addis Ababa And Part Of Rift Valley (ziway) Ethiopia

Vegetable samples were collected from northern Addis Ababa and Ziwayrnwhere there were no industrial contaminations. The samples whererncollected in May, 2007 and the concentrations of heavy metals (Cd, Cr,rnPb and Zn) were determined using flame atomic absorptionrnspectrophotometer. The total metal concentration of the soil and thernwater used for irrigation were also determined.rnThe concentration of lead obtained from the majority of the vegetablernfarms in northern Addis Ababa and Ziway surpassed the maximumrnrecommended limit of the metal in the vegetable tissue. The averagernconcentration of lead in Lettuce, Swiss chard, Ethiopian kale were foundrnto be 0.97 mg/kg, 0.3 mg/kg, 0.54 mg/kg and 0.4 mg/kg dry weight,rnrespectively. Although the high concentration of the other metals in thernsoil does not reach the toxicity level. There is a possibility of contaminantrnin the soil of a vegetable farm where there is minor industrialrncontribution.

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