REMOVAL OF AMMONIUM FROM AQUEOUS SOLUTIONS BY USING APATITE ORE/Fe3O4 NANOPARTICLES

Abstract

Removal of ammonium from aqueous solution by using apatite ore/Fe₃O₄ nanoparticles was investigated in the present study. Characterizations of the material were examined by SEM and TEM. The concentration of ammonium was measured by Ultraviolet-visible spectroscopy (UV-Vis). The optimum conditions for examining ammonium by UV-Vis were systematically studied and found as wave length 420 nm; pH 1-2; time 30 min. The experiments were conducted using the following parameters: absorbent mass 0.1 g; the solution volume 25 mL; pH 7,0 – 8,0; shaking speed 200 rounds/min; contact time 150 min at room teperature (25 ± 2⁰C). In the temperature range of 298 ÷ 338K, the ammonium adsorption capacity and the ammonium effective adsorption were reduced when the temperature increased. Maximum ammonium adsorption capacity on the material was calculated by the Langmuir adsorption isotherm model as 13.69 mg/g at 25 ± 2⁰C.