Defatting Carica papaya seed adsorbent (DPS) increased its
adsorption capacity for MB dye from 769.23 to 1250 mg g−1. FT-IR
analysis of the DPS adsorbent suggests the presence of ,-
unsaturated ketone, -keto (enolic) esters, Lactones, quinones and
carboxylic acids which were absent in the Undefatted sample. This
was confirmed from chemical analysis of DPS adsorbent. It was
observed that acidic groups were responsible for the adsorption
of MB dye from aqueous solution