title: Phytoremediation of metals using lemongrass (Cymbopogon citratus (D.C.) Stapf.) grown under different levels of red mud in soil amended with biowastes.
abstract: Due to hostile condition of red mud (RM), its utilization for vegetation is restricted. Therefore, RM with biowastes as soil amendment may offer suitable combination to support plant growth with reduced risk of metal toxicity. To evaluate the effects of RM on soil properties, plant growth performance, and metal accumulation in lemongrass, a study was conducted using different RM concentrations (0, 5, 10, and 15% w/w) in soil amended with biowastes [cow dung manure (CD) or sewage-sludge (SS)]. Application of RM in soil with biowastes improved organic matter and nutrient contents and caused reduction in phytoavailable metal contents. Total plant biomass was increased under all treatments, maximally at 5% RM in soil with SS (91.4%) and CD (51.7%) compared to that in control (no RM and biowastes). Lemongrass acted as a potential metal-tolerant plant as its metal tolerance index is >100%. Based on translocation and bioconcentration factors, lemongrass acted as a potential phytostabilizer of Fe, Mn, and Cu in roots and was found efficient in translocation of Al, Zn, Cd, Pb, Cr, As, and Ni from roots to shoot. The study suggests that 5% RM with biowastes preferably SS may be used to enhance phytoremediation potential of lemongrass.
authors.affiliation: a Laboratory of Air Pollution and Global Climate Change, Department of Botany , Institute of Science, Banaras Hindu University , Varanasi , India.
authors.forename: Meenu
authors.initials: M
authors.lastname: Gautam
authors.affiliation: b Stockholm Environment Institute at York, Grimston House , University of York , Heslington, York United Kingdom.
authors.forename: Divya
authors.initials: D
authors.lastname: Pandey
authors.affiliation: a Laboratory of Air Pollution and Global Climate Change, Department of Botany , Institute of Science, Banaras Hindu University , Varanasi , India.
authors.forename: Madhoolika
authors.initials: M
authors.lastname: Agrawal
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D002417:Cattle; D031743:Cymbopogon / Q000378:metabolism*; D007194:India; D007220:Industrial Waste / Q000032:analysis; D008372:Manure / Q000032:analysis*; D008670:Metals / Q000378:metabolism*; D008906:Mining; D012722:Sewage / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D007220:Industrial Waste; D008372:Manure; D008670:Metals; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants
keywords: Cymbopogon citratus; phytoremediation; red mud