International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Removal of large monovalent cations, as highly toxic thallium (Tl), from the waters is a subject of significant interest due to the hazards its pose. Active materials on the basis of activated carbons intended for removal of Tl ions from drinking water was synthesized and characterized in two stages. During the first, deposition and stabilization of the Fe (3+) phase in the internal surface of activated carbon samples (AC/Fe (3+)) was carry out. During the second, deposition on the AC/Fe (3+) of K4[Fe(CN)6] phase and subsequent chemical reaction were realized. The removal performance of the samples prepared for Tl ions in aqueous solution was investigated by adsorption process. Increased sorption possibilities were observed toward Tl ions as compare to initial carbons.

Canisters for present-day gas masks are usually filled with impregnated ASC Whetlerite activated carbons. To solve the inherent problems of the carbon catalysts new types of Cu/Zn-based impregnated carbons with complete substitution of Cr with Mo and by addition in the impregnating solution of alkaline K2CO3 and TEDA in some cases were prepared. The removal efficiency of these samples against HCN vapours in air tested under standard conditions demonstrated that the content of K2CO3 to ~ 4% in Cu/Zn samples extends the protection effect to practically equal to the same parameter for the ASC Whetlerite. The inclusion of TEDA in the phase composition of the catalysts does not impair the protection properties towards HCN of the carbon catalysts.

A concept is presented for the development of a carbon catalyst for protection from vapours of highly toxic substances, different from the ASC Whetlarite type of impregnated Cu/Cr/Ag carbons, based on the analysis of the disadvantages of the breathing filters of contemporary gas masks. It is concluded that promising carbon catalysts will possess higher stability with respect to aging and better protective properties in regard to a considerable number of industrial toxic compounds.