title: Effect of surfactants on Fenton's reagent-mediated degradation of Kraft black liquor.
abstract: 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.
authors.affiliation: Laboratorio de Bioquímica Adaptativa, Departamento de Bioquímica, Facultad de Medicina, Universidad de Los Andes, Mérida-5101,Venezuela.
authors.forename: Maybeth
authors.initials: M
authors.lastname: Escalante
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Rodríguez-Malaver
authors.forename: Elisa
authors.initials: E
authors.lastname: Araujo
authors.forename: Aura M
authors.initials: AM
authors.lastname: González
authors.forename: Orlando J
authors.initials: OJ
authors.lastname: Rojas
authors.forename: Nancy
authors.initials: N
authors.lastname: Peñaloza
authors.forename: Johnny
authors.initials: J
authors.lastname: Bullón
authors.forename: Mayra A
authors.initials: MA
authors.lastname: Lara
authors.forename: Natalia
authors.initials: N
authors.lastname: Dmitrieva
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Pérez-Pérez
mesh_terms: 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*
chemical_list: C045076:Fenton's reagent; D010636:Phenols; D013501:Surface-Active Agents; C076151:Kraft lignin; D008031:Lignin; D006861:Hydrogen Peroxide; D007501:Iron