title: Biosorption kinetics of heavy metals by leaf biomass of Jatropha curcas in single and multi-metal system.
abstract: Biosorption of Cu(2+), Zn(2+), and Cr(6+) from aqueous solutions by leaf biomass of Jatropha curcas was investigated as a function of biomass concentration, initial metal ion concentration, contact time, and pH of the solution systematically. The aim of this study was to optimize biosorption process and find out a suitable kinetic model for the metal removal in single and multi-metal system. The experimental data were analyzed using two sorption kinetic models, viz., pseudo-first- and pseudo-second-order equations, to determine the best fit equation for the biosorption of metal ions Cu(2+), Zn(2+), and Cr(6+) onto the leaf biomass of J. curcas in different metal systems. The experimental data fitted well the pseudo-second-order equation and provided the best correlation for the biosorption process. The findings of the present investigation revealed that J. curcas leaf biomass was an eco-friendly and cost-effective biosorbent for the removal of heavy metal ions from wastewater.
authors.affiliation: Ecotechnology Laboratory, Department of Environmental Science, G.B. Pant University of Agriculture and Technology, Pantnagar, 263 145, India.
authors.forename: Anand Prabha
authors.initials: AP
authors.lastname: Rawat
authors.forename: Krishna
authors.initials: K
authors.lastname: Giri
authors.forename: J P N
authors.initials: JP
authors.lastname: Rai
mesh_terms: D001673:Biodegradation, Environmental; D018533:Biomass; D004784:Environmental Monitoring; D031286:Jatropha / Q000378:metabolism*; D007700:Kinetics; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D062065:Wastewater; D014874:Water Pollutants, Chemical