An Assessment on the Effect of Heavy Metals Accumulation in Sorghum bicolor L., Arachis hypogea L. and Vigna unguiculata L. Grown Along Gusau-Sokoto Major Road
Keywords:
Heavy metals, crops, roadsides, pollution, plants and trafficAbstract
The pollution of soils by chemicals that contain heavy metals from automobile sources is an important environmental issue. Due to this important issue, a research was conducted to Assess the Effect of Heavy Metal Accumulation in Plants along Heavy Traffic Roads in Zamfara State, Nigeria. In this research, some selected edible plants (Sorghum, Cowpea, Groundnut/Peanut) were collected from five different locations along Gusau – Sokoto road as treatment samples. At the same time three plants were collected from Jaurin Rogo, Gusau as control samples. The plants samples after digestion were prepared and analyzed six metals (ZN, Cd, Pb, Cr, Ni, & Cu) by using Atomic Absorption Spectroscopy (AAS) and the results when compared with WHO/FAO (1996) threshold limits of heavy metals in plants, were found to be above permissible limits for two heavy metals (Cd & Cr) in all plant samples. The research findings unveiled the risk associated with planting and rearing besides major traffic roads of the country and recommended proper monitoring of the planting sites and cash crops such as cotton should be planted instead.
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