PJB-2020-345
Risk Of Heavy Metals Accumulation In Vegetables Grown In Wadi Al-Arg, Taif, KSA
Asmaa A Hamad
Abstract
The present study was carry out to estimate heavy metals mobility, bioconcentration and transfer from polluted soil to roots tissues and from roots tissues to aerial parts using bioconcentration factor and translocation factor in eight vegetables species growing at four sites in Wadi Al-Arg, Taif governorate, KSA. The data referred that Mentha longifolia, Cucumis sativus, Capsicum annuum, Lactuca sativa Cucurbita pepo, and Anethum graveolens that grown in sites of investigation could be recognized as suitable for human consumption. These six vegetables accumulate the measured heavy metals in their organs with acceptable quantities, less than the permissible levels of FAO. Otherwise, heavy metal concentrations in Solanum lycopersicum and Solanum melongena parts found to be higher than permissible limits of FAO. S. lycopersicum and S. melongena also showed elevated bioconcentration factors values for most of measured heavy metals. For S. lycopersicum the bioconcentration factor values of Fe, Cd, Cu, Pb, Cr, Mn, Ni, and Zn were found to be 42.150, 27.250, 1.023, 0.000, 5.926, 4.649, 29.409, and 0.459 respectively. While for S. melongena they were 2.360, 21.333, 0.000, 0.170, 0.000, 3.113, 50.318, and 0.623 respectively. The cultivation of S. lycopersicum and S. melongena in heavy metals polluted soil is not suggested without soil remediation. Continuous investigation of eatable parts of the both vegetables grown in soil polluted with heavy metals must be taken into consideration to monitor these toxic elements in human regime and avoid harmful effects on human health.
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