LAUSR

The combination of electrochemical and adsorption methods has shown efficient reduction of total organic carbon (TOC) and removal of Padan 95SP (95% Cartap) from water due to its oxidation and adsorption on granular activated carbon. The influence of supporting electrolytes, flow rate, bed height, number of repeated adsorption cycles as well as initial concentration was studied in order to determine their effect on TOC and Cartap removal. The concentration of Cartap was determined by UV-vis spectroscopy according to 5,5′-dithiobis-(2-nitrobenzoic acid)-procedure. This combination of methods provides more than 90% of Cartap removal and approximately 75% of TOC reduction. Increase of the bed height and repeated adsorptive treatment of the solution do not increase the TOC removal remarkably. High performance liquid chromatography was used to characterize the formation of electrochemical by-products. Granular activated carbon used in the adsorption steps were examined before and after usage with FT-IR spectroscopy.