title: Effect of Fenton's reagent on O/W emulsions stabilized by black liquor.
abstract: The effect of Fenton's reagent (FR) on surface and dispersion properties of black liquor (BL) was investigated. These properties were compared to those of indulin C (IC), a commercial lignin, and egg lecithin (Le). FR was applied at two different bulk concentrations of H2O2 (160 and 320 mM). At pH 8, a minimum in surface tension for the Fenton treated BL was observed. The dispersant ability of BL, IC and Le in oil-in-water (O/W) emulsions was studied by measuring emulsion stability and drop size. It was found that the surface activity and emulsifying capability of BL were higher than those of IC. The emulsifying capability of Le was improved by the FR treatment at low H2O2 concentration.
authors.affiliation: Laboratorio de Bioquímica Adaptativa (LBA), Departamento de Bioquímica, Facultad de Medicina, Universidad de Los Andes (ULA), Mérida 5101, Venezuela. lauraitm@ula.ve
authors.forename: Laura I
authors.initials: LI
authors.lastname: Tolosa
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Rodríguez-Malaver
authors.forename: Aura M
authors.initials: AM
authors.lastname: González
authors.forename: Orlando J
authors.initials: OJ
authors.lastname: Rojas
mesh_terms: D004655:Emulsions / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D008031:Lignin / Q000737:chemistry; D009821:Oils / Q000737:chemistry*; D010063:Ovum / Q000737:chemistry; D010209:Paper; D010316:Particle Size; D010713:Phosphatidylcholines / Q000737:chemistry; D028223:Pinus / Q000737:chemistry; D013500:Surface Tension; D013501:Surface-Active Agents / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D004655:Emulsions; C045076:Fenton's reagent; D007220:Industrial Waste; D009821:Oils; D010713:Phosphatidylcholines; D013501:Surface-Active Agents; D014867:Water; D008031:Lignin; D006861:Hydrogen Peroxide; D007501:Iron