title: Pb(II) biosorption from hazardous aqueous streams using Gossypium hirsutum (Cotton) waste biomass.
abstract: Studies on the biosorptive ability of Gossypium hirsutum (Cotton) waste biomass outlined that smaller size of biosorbent (0.355mm), higher biomass dose (0.20g), 5 pH and 100mg/L initial Pb(II) concentration were more suitable for enhanced Pb(II) biosorption from aqueous medium. The Langmuir isotherm model and pseudo second order kinetic model fitted well to the data of Pb(II) biosorption. Highly negative magnitude of Gibbs free energy (DeltaG degrees ) indicated that the process was spontaneous in nature. In addition to this surface coverage and distribution coefficient values of Pb(II) biosorption process were also determined. At optimized conditions Pb(II) uptake was more rapid in case of industrial effluents in comparison to synthetic solutions. FTIR spectroscopic analysis revealed that the main functional groups involved in the uptake of Pb(II) on the surface of G. hirsutum biomass were carboxyl, carbonyl, amino and alcoholic.
authors.affiliation: Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Riaz
authors.forename: Raziya
authors.initials: R
authors.lastname: Nadeem
authors.forename: Muhammad Asif
authors.initials: MA
authors.lastname: Hanif
authors.forename: Tariq Mehmood
authors.initials: TM
authors.lastname: Ansari
authors.forename: Khalil-ur-
authors.initials: KU
authors.lastname: Rehman
mesh_terms: D018533:Biomass; D032561:Cotton Fiber / Q000379:methods*; D015386:Hazardous Substances / Q000032:analysis* / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000032:analysis* / Q000378:metabolism*; D012639:Seeds / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D015386:Hazardous Substances; D014874:Water Pollutants, Chemical; D007854:Lead