title: Iron-based adsorbent prepared from Litchi peel biomass via pyrolysis process for the removal of pharmaceutical pollutant from synthetic aqueous solution.
abstract: A porous iron-based adsorbent obtained from litchi peel via pyrolysis process was prepared in this work, in order to evaluate its adsorptive potential for the removal of a pharmaceutical dye (amaranth) from aqueous solution. The material was characterized by X-ray diffraction, nitrogen adsorption-desorption isotherms, and scanning electron microscopy. Several isotherm and kinetic models were tested aiming to represent the amaranth dye adsorption. The prepared sample presented magnetic property, and a mesoporous texture constituted of graphite and three iron-based phases. The adsorption kinetics of amaranth on the adsorbent followed the pseudo-second-order model, whereas the equilibrium data were in good agreement with the BET isotherm, being represented by a sigmoid-shaped adsorption isotherm. The maximum adsorption capacity for the amaranth dye was found to be 44.87 mg g-1, demonstrating that the material prepared in this work showed to be a promising adsorbent for the removal of amaranth from aqueous solution.
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil.
authors.forename: Vitória Segabinazzi
authors.initials: VS
authors.lastname: Foletto
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil.
authors.forename: Ananda Bulegon
authors.initials: AB
authors.lastname: Ferreira
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil.
authors.forename: Eric
authors.initials: E
authors.lastname: da Cruz Severo
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil.
authors.forename: Gabriela Carvalho
authors.initials: GC
authors.lastname: Collazzo
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil.
authors.forename: Edson Luiz
authors.initials: EL
authors.lastname: Foletto
authors.affiliation: Chemical Engineering Department, Federal University of Santa Maria (UFSM), 1000 Roraima Avenue, Santa Maria, 97105-900, Brazil. guilherme_dotto@yahoo.com.br.
authors.forename: Guilherme Luiz
authors.initials: GL
authors.lastname: Dotto
mesh_terms: D000327:Adsorption; D018533:Biomass; D004396:Coloring Agents; D006863:Hydrogen-Ion Concentration; D007501:Iron; D007700:Kinetics; D032125:Litchi; D014874:Water Pollutants, Chemical
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D007501:Iron
keywords: Adsorption; Amaranth dye; Equilibrium; Iron-based adsorbent; Kinetics