Phosgene toxic effects and influence of a new impregnant on protection

Abstract

Phosgene is a gas which affects the respiratory organs, causes pulmonary edema and suffocation. For the protection, activated carbon based filters are used. The filters are universal and used for a big number of pollutants. The objective of this study was to determine a new impregnant which would provide the respiratory protective filter with a greater adsorption capacity and longer service life. The activated carbon impregnation was performed with sodium and the filters were tested on a dynamic- sorption apparatus. The study results show that the optimal amount of sodium over activated carbon is 1.3 mal/dm³ and this amount of sodium provides the filter with the sorption capacity of 16.96 g and service life of 1532 s. Adsorbed water also has an effect on both the sorption capacity and service life of the filter. The study shows that the optimal amount of the adsorbed water in the filter activated carbon is 23% and it increases the filter sorption capacity by 18.49% and the service life up to 1674 s.