Levels of toxic metals in Telefairia occidentalis from a paint industry environment

Abstract

Analyses of samples of the plant Telfairia occidentalis grown on soils receiving paint waste were carried out for five metals (Zn, Pb, Cd, Cu and Cr) using atomic absorption spectrophotometer (AAS). Similar analyses were carried out for the same metals in samples of the plant from background soils. The results obtained showed higher levels of Zn and Cr in samples from soils receiving paint waste than in those from background soils. On the other hand, levels of Pb and Cu were higher in samples from background soils than those from soils receiving paint waste. The possible reason for this abnormality is given in the text. The degrees of accumulation of these metals in the samples of the paint from soils receiving paint waste in relation to their background values were as follows: Zn (1.10), Pb (0.34), Cd (0.00), Cu (0.80) and Cr (2.98) respectively. The effects these metals may likely have on animals and humans have been discussed based on the results, national and international standards as well as on available literature. Recommendations on possible methods of monitoring and controlling the distribution of these metals in the environment have been made.

Journal of Applied Chemistry and Agricultural Research Vol. 1 (1) 1994: pp. 35-42