Assessments of the potential trace metal contamination of vegetables and the corresponding under root soil in Addis Ababa, Ethiopia and potential health risks

Samenvatting

Cross-sectional study design was employed to collect a total of 28 vegetable and 28 corresponding under root soil samples from five sites in Ethiopia for trace metal analysis. In addition, the relative distributions of metal fractions (exchangeable, reducible, oxidizable and residual fractions) in the soil solid phase and the free metal ions in the soil solution were analysed based on a standard sequential extraction and DGT techniques respectively. We observed that, except Cd, the soil concentrations of the other trace metals were higher at urban sites. Most of the metals originated from anthropogenic activities (Cd, Mn, Ni and Zn) were significantly enriched in the soil and mainly associated with non-residual fractions. The result for the concentration of trace metals in the edible part of mostly consumed vegetables showed that Zn, Pb, Cd, Cu and As were above the permissible limit of WHO and FAO. Leafy vegetables from urban sites contained the highest concentration of trace metals. There was no potential health risk associated with dietary intake of individual trace metals but the combined effect of all the measured trace metals showed the presence of potential health risks for consumers

Datum prijs	2016
Originele taal	English