1. PHYTOREMEDIATION OF POTENTIALLY TOXIC ELEMENTS IN INDUSTRIAL SOIL USING HILDEGARDIA BARTERI (MAST.) KOSTERM
- Author
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Odeyale O.C., Akintola O.O., Arojojoye J.T., and Ogidan O.A.
- Subjects
bioaccumulation ,toxicity ,translocation ,phytoextraction ,urban forestry ,Agriculture (General) ,S1-972 - Abstract
Potentially toxic elements (PTEs) contamination has become a sombre environmental risk. This study selected Hildegardia barteri as remediation specie for reduction of PTEs concentrations in industrial soil (IS). Pots experiment consisting of five treatments: T1 (2kg control soil (CS)), T2 (1.5 kg CS + 0.5kg IS), T3 (1kg CS+1kg IS), T4 (0.5kg CS+1.5kg IS) and T5 (2kg IS) were replicated six times in a completely randomized design. The experiment was done for a period of 12 weeks after transplanting (WAT). Soil samples before and at the end of experiments, the roots and shoots of Hildegardia barteri were analysed for Zn, Cu, Pb, Co and Cr using Atomic Absorption Spectrophotometer (AAS). Data were assessed using bioaccumulation factor (BAF) and translocation factor (TF). The concentrations of PTEs in soil before the experiment in the treatments were Zn (40.11-58.21), Cu (28.91-43.29), Pb (18.05-28.11), Co (8.21-15.85) and Cr (5.78-14.11) in mg/kg. Also, the concentrations of PTEs in soil at the end of the experiment were Zn (15.35-20.51), Cu (15.62-18.73), Pb (10.48-20.37), Co (3.62-6.26) and Cr (2.94-6.21) in mg/kg. Concentrations of PTEs (mg/kg) in shoots were significantly higher at P≤0.05 than those in the roots of Hildegardia barteri. The values of BAF were between 0.68 and 1.23 while TF values ranged from 1.01 to 1.48. Bioaccumulation and translocation factors indicated that Hildegardia barteri can effectively accumulate PTEs (Zn, Cu, Pb, Co and Cr) into the roots and transfer them into their shoot. This study has shown that Hildegardia barteri can reduce the toxicity of the elements in soils. Thus, planting of Hildegardia barteri is recommended for urban forestry in the study area.
- Published
- 2022