Adsorption of Procion Blue MX-R dye from aqueous solutions by lignin chemically modified with aluminium and manganese.
A macromolecule, CML, was obtained by purifying and carboxy-methylating the lignin generated from acid hydrolysis of sugarcane bagasse during bioethanol production from biomass. The CMLs complexed with Al(3+) (CML-Al) and Mn(2+) (CML-Mn) were utilised for the removal of a textile dye, Procion Blue MX-R (PB), from aqueous solutions. CML-Al and CML-Mn were characterised using Fourier transform infrared spectroscopy (FTIR), scanning differential calorimetry (SDC), scanning electron microscopy (SEM) and pHPZC. The established optimum pH and contact time were 2.0 and 5h, respectively. The kinetic and equilibrium data fit into the general order kinetic model and Liu isotherm model, respectively. The CML-Al and CML-Mn have respective values of maximum adsorption capacities of 73.52 and 55.16mgg(-1) at 298K. Four cycles of adsorption/desorption experiments were performed attaining regenerations of up to 98.33% (CML-Al) and 98.08% (CML-Mn) from dye-loaded adsorbents, using 50% acetone+50% of 0.05molL(-1) NaOH. The CML-Al removed ca. 93.97% while CML-Mn removed ca. 75.91% of simulated dye house effluents.
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil; Department of Chemical Sciences, Ajayi Crowther University, PMB 1066 Oyo, Oyo State, Nigeria.
Matthew A
MA
Adebayo
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
Lizie D T
LD
Prola
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil. Electronic address: eder.lima@ufrgs.br.
Eder C
EC
Lima
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
M J
MJ
Puchana-Rosero
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
Renato
R
Cataluña
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
Caroline
C
Saucier
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
Cibele S
CS
Umpierres
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, Postal Box 15003, 91501-970 Porto Alegre, RS, Brazil.
Julio C P
JC
Vaghetti
Institute of Chemistry, Federal University of Uberlândia (UFU), AV. João Naves de Ávila 2121 block 1D-Campus Santa Mônica, 38400-902 Uberlândia, MG, Brazil.
Leandro G
LG
da Silva
Institute of Chemistry, Federal University of Uberlândia (UFU), AV. João Naves de Ávila 2121 block 1D-Campus Santa Mônica, 38400-902 Uberlândia, MG, Brazil.
Reinaldo
R
Ruggiero
D000327:Adsorption; D000535:Aluminum / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D015394:Molecular Structure; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014227:Triazines / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D012996:Solutions; D014227:Triazines; D014874:Water Pollutants, Chemical; C036598:procion blue MX-R; D008345:Manganese; D008031:Lignin; D000535:Aluminum
Adsorption; General order kinetic model; Lignin complex; Nonlinear isotherm fitting; Procion Blue MX-R dye