Abstract: An aminated hypercrosslinked macroporous polymeric adsorbent was
synthesized and characterized. Adsorption isotherms for
1-amino-2-naphthol-4-sulfonic acid (1, 2, 4-acid) and 2-naphthol obtained from
various binary adsorption environments can be well fitted by Freundlich
equation, which indicated a favorable adsorption process in the studied range.
Adsorption for 1, 2, 4-acid was an endothermic process in comparison with that
for 2-naphthol of an exothermic process. 2-naphthol molecules put a little
influence on the adsorption capacity for 1, 2, 4-acid. However, the adsorption
to 1, 2, 4-acid depressed that to 2-naphthol in a large extent for the stronger
electrostatic interaction between 1, 2, 4-acid and adsorbent. The predominant
mechanism can be contributed to the competition for adsorption sites. And the
simultaneous environment was confirmed to be helpful to the selective
adsorption towards 1,2,4-acid based on the larger selectivity index.