Adsorption of metal ions and dyes on brewer's refuse and its chemically modified products

To use brewer's refuse as adsorbent adsorption of metal ions and dyes on it and its chemically modified products were examined. The refuse samples use d in the present study are protein rich fraction(Pr) and cellulosics rich f raction(Hr) obtained by sifting brewer's refuse. Adsorption experiments wer e conducted by a batchwise method. The ability of Hr to adsorb acid dye increased by chemical modification, es pecially did remarkably by diethylaminoethylation. The degree of increase g reatly exceeded that by crosslinking reported in previous paper. The adsorp tion ability of Pr for metal ions and acid dyes decreased sharply when it w as treated with alkali. However, the adsorption ability of Pr for metal ion s and a basic dye could be greatly raised by treating with hydrochloric aci d.