Adsorption of Cu²⁺ and a Acid Dye on the Adsorbent Obtained by Crossliking the Residue from Adzuki Bean Paste

Abstract

The residue in the preparation of adzuki bean paste was dried and milled (it was designated AZ). AZ allowed to react with 1, 3, 5-triacryloylhexahydro-1, 3, 5-triazine. The adsorbent obtained was designated TAZ. The adsorptive properties of these substrates were examined for Cu²⁺, C. I. Acid Orange 7 and phenol. The uptakes of these solutes were calculated from the concentration of unadsorbed solute estimated by colorimetry and atomic absorption spectrophotometry. C. I. Acid Orange 7 and Cu²⁺ uptakes (mol/10⁵ g) by AZ were 1.5-5.2 and 3.5-7.5, respectively. On the other hand Cu²⁺ uptake by TAZ was slightly less than that by AZ, but C. I. Acid Orange 7 uptake by TAZ was significant. Phenol was not adsorbed by AZ and TAZ. AZ may be effectively used as coagulating agent for anion ic dyes and Cu²⁺. It seems that TAZ is the superior adsorbent for anionic dyes.