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ISSN Print: 2381-1013 ISSN Online: 2381-1021

American Journal of Agricultural Science

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Bioaccumulation of Heavy Metals in Cucurbita maxima Duch. and Telfairia occidentalis Hook. F. Grown on Crude oil Polluted Soil

American Journal of Agricultural Science
Vol.4 , No. 4, Publication Date: Aug. 21, 2017, Page: 88-93

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Authors

[1]	Okon Okon Godwin, Department of Botany and Ecological Studies, Faculty of Science, University of Uyo, Uyo, Nigeria.

Abstract

This research examines the effect of crude oil polluted soil and heavy metal uptake and accumulation in crude commonly consumed vegetables Cucurbita maxima and Telfairia occidentalis grown and harvested at both crude oil polluted and unpolluted sites and the health implications of consuming these food crops. Heavy metal concentrations of Cucurbita maxima and Telfairia occidentalis were analyzed. Results showed higher increased values of Cr, Cu, Cd and Zn in both plants when compared to results obtained from the ones planted on unpolluted soils indicating that there is significant difference between both soils. Zn and Cu showed high accumulation in both food crops suggesting that there is a likely possibility of Zn and Cu poisoning if contaminated food crops are ingested. This study revealed that crude oil pollution negatively affected the Physiochemical Properties of the Experimental Soils, increased heavy metal accumulation in Cucurbita maxima and Telfairia occidentalis which are among the most frequently consumed vegetables in Southern Nigeria, reducing its edibility and quality. These heavy metals even at permissible limits with gradual and steady deposition of such heavy metals in the soils, it may build-up to toxicity level. However, Cucurbita maxima and Telfairia occidentalis is vulnerable to the effect of oil spill and heavy metals pollution which is common in Southern Nigeria as shown from the present study. Thus, these crops should not be cultivated as a sole crop in areas polluted with crude oil and its associated products as plant parts can serve as sink to heavy metals which are dangerous to human health.

Keywords

Bioaccumulation, Cadmium, Copper, Cucurbita maxima, Heavy Metals, Telfairia occidentalis, Zinc

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