COMPOSITE SORBENTS OF INORGANIC ION-EXCHANGERS AND POLYACRYLONITRILE BINDING MATRIX .1. METHODS OF MODIFICATION OF PROPERTIES OF INORGANIC ION-EXCHANGERS FOR APPLICATION IN COLUMN PACKED-BEDS

Methods of preparation of granules of inorganic ion exchangers as well as methods for improvement of granular strength of these materials ar e reviewed. The resulting ion exchangers are classified in three group s - ''intrinsic'', supported and composite ion exchangers. Their prope rties are compared and possibilities of their technological applicatio n are evaluated. A new method of preparation of inorganic-organic comp osite sorbents of inorganic ion-exchangers and polyacrylonitrile bindi ng matrix is described, advantages and disadvantages of such sorbents are discussed. Proposed fields of application include tratment of liqu id radioactive and/or hazardous wastes, decontamination of natural wat er as well as analytical applications.