ACTIVATED CARBON FIBROUS MATERIAL FOR CLEANING WATER FROM TOXIC CHEMICALS AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2020 - IPC B01J20/20 B01J20/28 B01J20/32 C01B32/348 B01D39/08 A62D3/00 C02F1/28 C02F101/10 C02F101/18 C02F101/36 C02F103/04 A62D101/02 A62D101/22 A62D101/26 A62D101/41 A62D101/45 

FIELD: ecology.

SUBSTANCE: invention relates to ecology, in particular to sorption purification of aqueous solutions from toxic compounds fluoroanhydride of methyl fluorophosphonic acid CH₃POF₂, cyanides and arsenical compounds, and can be used in filters for water treatment of collective use and in field facilities of water supply. Disclosed is an activated carbon fibrous material, which is a high-porosity carbon fiber based on carbon fabric such as BUSOFIT T-55, consisting of thin threads with diameter of 5 to 15 mcm, mainly formed by carbon atoms, wherein activated carbon fibrous material contains copper oxide in amount of 2.0–3.0 wt%. and iron hydroxide in amount of 12.0–14.0 wt%. Method of producing activated carbon fiber material involves preparing an impregnation solution by diluting a concentrated solution of iron salts and copper with distilled water heated to 30–40 °C from 0.340 kg/dm³ of ferric chloride and 0.06 kg/dm³ of copper sulphate, loading of activated carbon material into mixing apparatus, impregnation of sorption fabric with prepared solution while stirring during 10–15 minutes in an impregnating solution heated to 55–70 °C and taken in amount of 0.35 kg/dm³ to loaded active fabric, followed by treatment with sodium hydroxide solution with concentration of 10 wt% for precipitation of iron and copper compounds, unloading product for outdoor lazing for 1.5–2.0 h, heat treatment in furnace with slit-type retort at temperature 120 °C for 40–70 minutes, wherein preliminarily carbon fiber material is subjected to activation by carbonisation in presence of steam at temperature of 900 °C with flow rate of 5–8 m/h and steam flow rate of 12–14 l/h to obtain activated carbon material with activation degree of 40–50 %, which is then washed in water using drum type washing machines in 3–5 sessions for 9–25 minutes and dried at 120–150 °C for 2–5 hours. Number of added additives provides equal time of protective action from different types of toxic water contaminants, at the same time number of operations and solutions is reduced when producing this material.

EFFECT: obtained material has high adsorption activity compared to existing granulated sorbents in extracting fluoroanhydride of methyl fluorophosphonic acid from water, equal to 1–6 mg/g, cyanides – 2_1 mg/g and arsenical compounds – 2_3 mg/g.

2 cl, 1 ex