염화철(III)로 표면개질 활성탄을 이용한 비소제거

Abstract

The present study investigates treatment methods for removal of arsenic from wastewater. The granular activated carbon (GAC) with the coating of iron chloride (FeCl3) was used for the treatment of a low concentration of arsenic from wastewater. Batch experiments were performed to investigate the synthesis of Fe-GAC (Iron coated granular activated carbon), effects of pH, adsorption kinetics and the Langmuir model. The synthesized Fe-GAC with 0.1 M FeCl3 shows best removal efficiency. Adsorption studies were carried out in the optimum pH range of 4-6 for arsenic removal. The Fe-GAC showed promising results by removing 99.4% of arsenic. In the adsorption isotherm studies, the observed data fitted well with the Langmuir models, In continuous column study showed that As (V) could be removed to below 0.25 mg/L within 1,020 pore volume, Our results suggest that the surface modified granular activated carbon treated with FeCl3 for effective removal of arsenic from wastewater.