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Abstract:
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Phytoremediation is an alternative technology to remove heavy metals in contaminated soil. Vetiver grass (Vetiveria zizanioides (Linn.) Nash) was used for Cadmium (Cd) and Lead (Pb) removal experiments in 4 various soil types: {SI) sandy soil with abundant organic matter; (82) sandy soil with poor organic matter; (83) clay soil with abundant organic matter; (84) clay soil with poor organic matter. Plants were grown for 30 days before transferring to experimental pots. Pb(N03)2 solution was added to Ihe soil types in each experimental pot at O, 100, 300 and 700ppm; similarly CdC12 : O, l O, 30 and 60ppm. Plants were observed for their growth and harvested after 3 months. Cd aud Pb accumulation in roots and shoots was analyzed. The results sho'wed that Vetiver grass grew in 4 various soil types. The statistical analysis indicated that vetiver's uptake ability of Cd and Pb increase as the level of Pb, Cd in various soil types increase. Cd accumulation rates between shoots and roots of vetiver grass were fairly low (<13.32%); on the contrary, the accumulation rates ofPb shoot/ root is very high (9.72%-88.14%). Therefore, vetiver grass can use to phytoextration of Pb and phytostabilization of Cd. |