Thorium ions adsorption from aqueous solution by amino naphthol sulphonate coupled chitosan

A designed new adsorbent by coupling chitosan and 1-Amino-2-naphthol-4-sulphonic acid to get an excellent synergistic effect of 1-Amino-2-naphthol-4-sulphonic coupled chitosan (ANSC) which used for the removal of tetravalent thorium ions. The modified chitosan adsorbent was identified by BET isotherm studies, elemental analysis, SEM, EDX and FT-IR, techniques. The FT-IR confirmed the structure of the modified chitosan. Langmuir isotherm model described the adsorption results with the 252.57 mg/g maximum adsorption capacity. It should be perceived that the thorium ions adsorption matched more careful with the kinetics pseudo-second-order. It was found that the adsorption of Th(IV) is strongly dependent on pH and time.