Adsorption of Cu(II), Cd(II), and Pb(II) from aqueous single metal solutions by cellulose and mercerized cellulose chemically modified with succinic anhydride.
This work describes the preparation of new chelating material from mercerized cellulose. The first part treats the chemical modification of non-mercerized cellulose (cell 1) and mercerized cellulose (cell 2) with succinic anhydride. Mass percent gains (mpg) and degree of succinylation (DS) of cell 3 (from cell 1) and cell 4 (from cell 2) were calculated. Cell 4 in relation to cell 3 exhibited an increase in mpg and in the concentration of carboxylic functions of 68.9% and 2.8 mmol/g, respectively. Cells 5 and 6 were obtained by treatment of cells 3 and 4 with bicarbonate solution to release the carboxylate functions and characterized by FTIR. The second part compares the adsorption capacity of cells 5 and 6 for Cu2+, Cd2+, and Pb2+ ions in an aqueous single metal solution. Adsorption isotherms were developed using Langmuir model. Cell 6 in relation to cell 5 exhibited an increase in Qmax for Cu2+ (30.4 mg/g), Cd2+ (86.0 mg/g) and Pb2+ (205.9 mg/g).
Gurgel
Leandro Vinícius Alves
LV
Departamento de Química, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, 35400-000, Ouro Preto, Minas Gerais, Brazil.
Júnior
Osvaldo Karnitz
OK
Gil
Rossimiriam Pereira de Freitas
RP
Gil
Laurent Frédéric
LF
D000327:Adsorption; D002104:Cadmium; D002482:Cellulose; D002854:Chromatography, Paper; D003300:Copper; D003461:Crystallography; D006863:Hydrogen-Ion Concentration; D007854:Lead; D008628:Mercury; D008670:Metals / Q000737:chemistry*; D012996:Solutions; D013387:Succinic Anhydrides; D014867:Water
D008670:Metals; D012996:Solutions; D013387:Succinic Anhydrides; D002104:Cadmium; D014867:Water; D007854:Lead; C031801:succinic anhydride; D003300:Copper; D002482:Cellulose; D008628:Mercury