Decomposition of EDTA in aqueous solution by UV / H_2o_2 PROCESS

摘要

The decomposition of EDTA in aqueous solution by UV/H_2O_2 process was studied under various solution pH values, H_2O_2 dosages, UV light intensities, temperatures and concentrations of Cu~2+ in order to determine the completeness of decomposition. The removal and mineraliza- tion rates of EDTA by UV/H_2O_2 process increased with increasing light intensity possibly due to the increased generation rate of hydroxyl free radicals. Free copper ions might serve as catalysts to accelerate the reaction rate, except in alkaline conditions, where copper ion would precipitate ad hydroxide.