Adsorption kinetic in fixed-bed column using Purolite Resin A400 resin impregnated with Cu metal

摘要

Adsorption method through ion exchange process using resin as the adsorbent is used to remove nitrate contaminant from the water body. The occurrence of nitrate ion adsorption on resin surface is a negative ion interaction having the same charge between nitrate ion and chloride ion on Purolite Resin A400. This study was conducted in a fixed-bed column. The research aimed to determine the effect of loading time on nitrate removal efficiency using Purolite and Purolite-Cu, and to determine the effect of initial nitrate concentration and complementary ions concentration of chloride, sulate, and phosphate on the nitrate adsorption kinetic in the fixed-bed column. Adsorption kinetic in the fixed-bed column is affected by flow rate, initial influent concentration and complementary ions such as chloride, sulfate, and phosphate. Adsorption kinetic has effect on loading time and channeling effect in the fixed-bed column. The increase in loading time causes the decrese in channeling effect, and as the result, removal efficiency is also increased. The highest nitrate removal efficiency using Purolite-Cu is obtained at the loading time of 28 seconds with removal value of 93.4 % at initial nitrate concentration of 60 mg/l.