The reaction of thiodiglycol on metal-impregnated carbon

In order to investigate the reactive removal of persistent chemical warfare (CW) gases, active carbons, grade 80 CTC, and active carbon impregnated wi th cobalt(II), chromium(VI), nickel (II), cadmium(II) or copper(II) salts w ere saturated at room temperature with the vapours of thiodiglycol (TDG), a hydrolysis product of sulphur mustard. The carbons exposed to TDG were sub jected to thermogravimetric analysis (TGA). The thermograms indicated the r eactions of metal salts with the adsorbate, as was confirmed by GC-MS after extracting the reaction products from TDG-exposed carbon impregnated with a mixture of chromium(VI) salt and sodium hydroxide. The extractants used w ere dichloromethane and methanol. 1,4-Oxathiane and 1,4-oxathiane,4-oxide w ere the reaction products on Cr(VI) plus NaOH impregnated carbon. The react ion mechanisms are also proposed. (C) 2001 Elsevier Science Ltd. All rights reserved.