title: Phytoremediation of iron from red soil of tropical region by using Centella asiatica.
abstract: The accumulation and removal efficiency of Fe by Centella asiatica was carried out at various Fe concentrations in soil treatments (0, 50, 100, 150 and 200 mg Fe/kg soil). Iron accumulation in different parts of C. asiatica (leaf, stem and root) was analyzed by atomic absorption spectrophotometer (AAS). Factorial experiment with a completely randomized design and Duncan's test were used for data analyses. The results revealed that C. asiatica have the ability to uptake and accumulate Fe significantly (p < 0.05; r  =  0.977) in the aerial parts. The different soil treatments had significant effect on the total Fe accumulations in C. asiatica (p < 0.05). The potential of C. asiatica as a metal hyperaccumulator plant, harvested for analysis, shows efficient accumulation of Fe at high concentration (p < 0.05; r  =  0.977). The root showed the highest accumulation of Fe followed by the leaves (p < 0.05) and the stem (p < 0.05). The Pearson correlation coefficient between leaves and root have showed highly significant correlation (p < 0.01; r  =  0.785) as compared to the leaves and stem (p < 0.01; r  =  0.780). The efficiency of Fe removal by C. asiatica from the contaminated soil has been evaluated by bioconcentration factor and translocation factor, found to be >1 and <1, respectively, further supporting its metal hyperaccumulator properties.
authors.affiliation: a Faculty of Earth Science, University Malaysia Kelantan , Kelantan , Malaysia.
authors.forename: Irshad Ul Haq
authors.initials: IU
authors.lastname: Bhat
authors.affiliation: a Faculty of Earth Science, University Malaysia Kelantan , Kelantan , Malaysia.
authors.forename: Eddma Nathan
authors.initials: EN
authors.lastname: Mauris
authors.affiliation: b Faculty of Agro Based Industry, University Malaysia Kelantan , Kelantan , Malaysia.
authors.forename: Zakia
authors.initials: Z
authors.lastname: Khanam
mesh_terms: D001673:Biodegradation, Environmental; D028041:Centella / Q000378:metabolism*; D007501:Iron / Q000378:metabolism*; D008296:Malaysia; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000378:metabolism; D018520:Plant Shoots / Q000378:metabolism; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism*; D013054:Spectrophotometry, Atomic
chemical_list: D012987:Soil; D012989:Soil Pollutants; D007501:Iron
keywords: Centella asiatica; bioconcentration factor (BCF); phytoremediation; translocation factor (TF)