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Paper Details

Evaluation of Lead Uptake Potential of Maize (Zea Mays) Seedling Grown in Contaminated Soil

Usman O.A. Shuaibu

Journal Title:Journal of Chemical, Biological and physical sciences

Major sources of lead include frequent use of alkyl lead fuel additives, lead in paints, disposal of discarded batteries, burning of garbage and painted wood, weathering of lead containing paints on building. Lead is a potential environmental hazard which needs to be removed from soil-water environment using environmentally friendly (eco-friendly), safe, cheap and non - convectional method (Phytoremediation). Phytoremediation is a novel, cost effective and eco - friendly `green` remediation technology for environmental cleanup. In the present research uptake of lead by Maize (Zea mays) seedling growing in varying levels of lead metal (as lead nitrate, PbNO3) contaminated soil was evaluated. The different levels of lead metal used were 0, 5, 10, 20 and 50?g/g for soil samples X, A, B, C and D, respectively. Soil sample X serves as control. The experiment was conducted for a period of 42days. Lead uptake by Maize (Zea mays) seedling was high at initial concentrations (5 and 10?g/g) of lead metal but gradually decreases as the lead metal concentration in soil increases. The lead content in the plant tissue and soil were quantified using Atomic Absorption spectroscopy. The result reveals that most of the lead was located in the roots and small amount was translocated to shoots when exposed to 50?g/g concentration of lead. At the end of the experiment (i.e. 42days) the plant was found to have potential to uptake toxic metals like lead from concentration ranging from 5 to 50?g/g. Thus Maize (Zea mays) is a suitable plant for phytoremediation operation.