The Effect of Chloride Ions on Alkylbenzenesulfonate Degradation in the Fenton Reagent

Degradation of sodium alkylbenzenesulfonate (ABS) in the Fenton reagent in the presence of Clions has been studied. An anionic surfactant sodium alkylbenzenesulfonate (C11-C14) has been selected as a model compound. The effect of individual components of the reactive system (H2O2, H2O2/Cl -, Fe/H2O2, Fe/H2O2/Cl -) on the degree of ABS degradation has been determined. The degree of ABS degradation has been found to be affected by the presence of Clions and the mutual molar ratios of individual components of the system studied. Moreover, it influences on the composition of the post-reaction mixture. The use of the Fenton reagent in the presence of Clions resulted in the formation of chloroorganic compounds in the solution studied. 2,4,6-trichlorophenol was identified in reaction products and its presence was confirmed using the HPLC MS method and by HPLC with an internal standard. No chloroproducts were identified during degradation of ABS by the system H2O2/Cl -. When only H2O2 was applied, the concentration of the surfactant was unchanged.