Abstract
Monitoring the content of rare metals in environmental objects at the level of their maximumpermissible concentrations is an important environmental task. The widely used physicochemical methods do notalways provide a direct solution to this problem because of the influence of the matrix composition of the sample onthe results of the determinations, as well as low concentrations of the determined elements. This article proposes anew modified sulfonated charcoal based on coal from the Shubarkul deposit for sorption of rare metal ions fromwater bodies. Concentrated sulfuric acid (H2SO4) is used as a modifier. The synthesis of new highly permeable crosslinked, sulfonated cation exchangers and their composition, structure by chemical and physical methods wasinvestigated. The static exchange capacity (SЕС) of sulfonated coal was calculated. The article shows an increase inSEC from the concentration used in the modification of H2SO4. During the synthesis, the static exchange capacity ofsulfonated coal increases at 240 min. heating up. The temperature stability of sulfonated coal is higher to (100-120 °)C. Sulfonated coal refers to medium acid cation exchangers, which work effectively at pH 2-14. The resultingsorption materials are recommended for use in treatment plants for the removal of rare metal ions.
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