Cadmium (Cd) Removal from Aqueous Solution by Iron Enhanced Pellets Made from Fly Ash

Abstract

In this research cylindrical shaped pellets made from fly ash bind by bentonite were fixed with iron to produce a new adsorbent material Fe-FB. The new adsorbent was then evaluated for Cd2+ removal using kinetic models. The optimum time and mass ratio of Fe3+:FB to fix iron was determined at 1h and 1:5 respectively. SEM-EDX analysis confirmed that iron was fixed on the FB and it had many porous structures. Removal can be described by the pseudo second order model. Importantly, it is superior to most powdered adsorbents due to its ability to be easily separated from wastewater when exhausted.