The test results have shown that the most adsorbents either
adsorbed both synthetic and natural dyes (like activated carbon), or
showed low adsorption activity towards synthetic dyes. The best
selectivity was shown for chitosan containing adsorbents. In
particularly, chitosan containing adsorbent Riosorb showed the
outstanding adsorption of synthetic dyes represented by the SDI
values, whereas SDI for natural drinks was the lowest of all the SDIs
obtained for other adsorbents