Hygiene and Sanitation №2 2008

Malysheva A. G., Lutsevich I. N., Kublanov Ye. Ye., Bezzubov A. A., Teplova T. Yu.

Transformation of surfactants in different ways of water disinfection

Evaluation of the efficacy of oxidants on the destruction of bisquarternary ammonium salts (BAS) in water demonstrated that the highest destruction effectiveness was achieved upon exposure to ozone (87%), potassium permanganate (68.2%), ultraviolet radiation (37.8%), by chlorination with gas chlorine (35.4%), lime chloride (24.1%), the least destruction was achieved by chlorination with sodium hypochlorite (21.9%). There was a more than 2-fold increase in the level of low-molecular impurities upon chlorine exposure of the water containing BAS as a result of transformation processes. In ozone treatment of BAS, unlike its chlorination, there was as high as 2-fold decrease in the concentration of C6-C9 alcohols present in their composition, giving rise to C6-C9 aldehydes (0.5%) and C6-C9 organic acids (as high as 3% of the mass content).