title: Synthesis and application of a new carboxylated cellulose derivative. Part I: Removal of Co(2+), Cu(2+) and Ni(2+) from monocomponent spiked aqueous solution.
abstract: A new carboxylated cellulose derivative (CTA) was prepared from the esterification of cellulose with 1,2,4-Benzenetricarboxylic anhydride. CTA was characterized by percent weight gain (pwg), amount of carboxylic acid groups (nCOOH), elemental analysis, FTIR, TGA, solid-state (13)C NMR, X-ray diffraction (DRX), specific surface area, pore size distribution, SEM and EDX. The best CTA synthesis condition yielded a pwg and nCOOH of 94.5% and 6.81mmolg(-1), respectively. CTA was used as an adsorbent material to remove Co(2+), Cu(2+) and Ni(2+) from monocomponent spiked aqueous solution. Adsorption studies were developed as a function of the solution pH, contact time and initial adsorbate concentration. Langmuir model better fitted the experimental adsorption data and the maximum adsorption capacities estimated by this model were 0.749, 1.487 and 1.001mmolg(-1) for Co(2+), Cu(2+) and Ni(2+), respectively. The adsorption mechanism was investigated by using isothermal titration calorimetry. The values of ΔadsH° were in the range from 5.36 to 8.09kJmol(-1), suggesting that the mechanism controlling the phenomenon is physisorption. Desorption and re-adsorption studies were also performed. Desorption and re-adsorption efficiencies were closer to 100%, allowing the recovery of both metal ions and CTA adsorbent.
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Filipe Simões
authors.initials: FS
authors.lastname: Teodoro
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Stela Nhandeyara do Carmo
authors.initials: SNDC
authors.lastname: Ramos
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Megg Madonyk Cota
authors.initials: MMC
authors.lastname: Elias
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Aparecida Barbosa
authors.initials: AB
authors.lastname: Mageste
authors.affiliation: Grupo de Química Verde Coloidal e Macromolecular, Departamento de Química, Centro de Ciências Exatas, Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n°, 36570-000 Viçosa, Minas Gerais, Brazil.
authors.forename: Gabriel Max Dias
authors.initials: GMD
authors.lastname: Ferreira
authors.affiliation: Grupo de Química Verde Coloidal e Macromolecular, Departamento de Química, Centro de Ciências Exatas, Universidade Federal de Viçosa, Av. P.H. Rolfs, s/n°, 36570-000 Viçosa, Minas Gerais, Brazil.
authors.forename: Luis Henrique Mendes
authors.initials: LHM
authors.lastname: da Silva
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil.
authors.forename: Laurent Frédéric
authors.initials: LF
authors.lastname: Gil
authors.affiliation: Grupo de Físico-Química Orgânica, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário Morro do Cruzeiro, s/n°, Bauxita, 35400-000 Ouro Preto, Minas Gerais, Brazil. Electronic address: legurgel@iceb.ufop.br.
authors.forename: Leandro Vinícius Alves
authors.initials: LVA
authors.lastname: Gurgel
mesh_terms: D000327:Adsorption; D000812:Anhydrides / Q000737:chemistry; D002413:Cations, Divalent; D002482:Cellulose / Q000031:analogs & derivatives / Q000138:chemical synthesis*; D003035:Cobalt / Q000302:isolation & purification*; D003300:Copper / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009532:Nickel / Q000302:isolation & purification*; D013816:Thermodynamics; D014233:Tricarboxylic Acids / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D000812:Anhydrides; D002413:Cations, Divalent; D014233:Tricarboxylic Acids; D014874:Water Pollutants, Chemical; D003035:Cobalt; D003300:Copper; D009532:Nickel; D002482:Cellulose; C069849:trimesic acid
keywords: 1,2,4-Benzenetricarboxylic anhydride; Adsorption; Carboxylated cellulose; Desorption; Isothermal titration calorimetry; Thermodynamics