title: Adsorption of chromium (VI) ion from aqueous solution by succinylated mercerized cellulose functionalized with quaternary ammonium groups.
abstract: Succinylated mercerized cellulose (cell 1) was used to synthesize an anion exchange resin. Cell 1, containing carboxylic acid groups was reacted with triethylenetetramine to introduce amine functionality to this material to obtain cell 2. Cell 2 was reacted with methyl-iodide to quaternize the amine groups from this material to obtain cell 3. Cells 2 and 3 were characterized by mass percent gain, degree of amination and quaternization, FTIR and CHN. Cells 2 and 3 showed degrees of amination and quaternization of 2.8 and 0.9 mmol/g and nitrogen content of 6.07% and 2.13%, respectively. Cell 3 was used for Cr (VI) adsorption studies. Adsorption equilibrium time and optimum pH for Cr (VI) adsorption were found to be 300 min and 3.1, respectively. The Langmuir isotherm was used to model adsorption equilibrium data. The adsorption capacity of cell 3 was found to be 0.829 mmol/g. Kinetic studies showed that the rate of adsorption of Cr (VI) on cell 3 obeyed a pseudo-second-order kinetic model.
authors.affiliation: Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil.
authors.forename: Leandro Vinícius Alves
authors.initials: LV
authors.lastname: Gurgel
authors.forename: Júlio César
authors.initials: JC
authors.lastname: Perin de Melo
authors.forename: Jorge Carvalho
authors.initials: JC
authors.lastname: de Lena
authors.forename: Laurent Frédéric
authors.initials: LF
authors.lastname: Gil
mesh_terms: D000327:Adsorption; D000588:Amines; D000837:Anion Exchange Resins / Q000138:chemical synthesis* / Q000737:chemistry*; D001709:Biotechnology / Q000379:methods; D002482:Cellulose / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry* / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013387:Succinic Anhydrides / Q000737:chemistry*
chemical_list: D000588:Amines; D000837:Anion Exchange Resins; D000644:Quaternary Ammonium Compounds; D013387:Succinic Anhydrides; D002857:Chromium; C074702:chromium hexavalent ion; C031801:succinic anhydride; D002482:Cellulose