Effect of surfactants on Fenton's reagent-mediated degradation of Kraft black liquor.
One of the limitations of the biodegradation of hydrophobic chemical compounds, like lignins, is their low solubility in the aqueous solution where this process takes place. To resolve this problem, surfactants have been used to improve the solubility of these hydrophobic compounds. In this investigation, we studied the effect of surfactants (anionic, cationic, and non-ionic) on the treatment of Kraft black liquor with Fenton's reagent. In the Fenton reaction, H2O2 (two different concentrations, 10 mM and 20 mM), FeCl2 (1 mM) and surfactant solution (10%) were used. Black liquor degradation was determined by UV/Visible spectrophotometry and by measuring phenolic groups. In the presence of Fenton's reagent, the optimum conditions for the oxidative degradation of black liquor were 10 mM H2O2, 1 microL of 10% solution of anionic surfactant (SDS). The importance of the use of surfactants for preparing black liquor for subsequent Fenton's reagent-mediated degradation was discussed.
Escalante
Maybeth
M
Laboratorio de Bioquímica Adaptativa, Departamento de Bioquímica, Facultad de Medicina, Universidad de Los Andes, Mérida-5101,Venezuela.
Rodríguez-Malaver
Antonio J
AJ
Araujo
Elisa
E
González
Aura M
AM
Rojas
Orlando J
OJ
Peñaloza
Nancy
N
Bullón
Johnny
J
Lara
Mayra A
MA
Dmitrieva
Natalia
N
Pérez-Pérez
Elizabeth
E
D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry*; D010636:Phenols / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
C045076:Fenton's reagent; D010636:Phenols; D013501:Surface-Active Agents; C076151:Kraft lignin; D008031:Lignin; D006861:Hydrogen Peroxide; D007501:Iron