METHOD AND APPARATUS FOR PRODUCING SORBENT, MAINLY FOR REMOVING ARSENIC FROM DRINKING WATER

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to a method and apparatus for producing a sorbent, mainly for removing arsenic from drinking water. The method involves the following steps: saturating a water-absorbent wettable organic carrier material with an aqueous solution of a water-soluble iron salt, filtration thereof and drying to constant weight, saturating the carrier material with a stoichiometric amount of oxalic acid and/or a water-soluble salt of oxalic acid, followed by filtration thereof and drying to constant weight, with conversion of iron ions to a water-insoluble iron oxalate, converting the saturated carrier material to activated carbon by anaerobic heating, subjecting the saturated carrier material to anaerobic cooling with decomposition of iron oxalate to iron and carbon dioxide, pre-oxidation of iron particles of the activated carbon with a water-soluble peroxide compound, filtering the activated carbon and washing until complete removal of salt therefrom, followed by filtration and drying thereof once more, converting iron hydroxide formed on the surface of iron particles to magnetite by anaerobic heating of the activated carbon, followed by anaerobic cooling of the sorbent to room temperature.;EFFECT: invention provides efficient and cheap removal of arsenic.;20 cl, 1 dwg, 1 ex