120th General Meeting of the KCS

Type Poster Presentation
Area Environmental Energy
Room No. Exhibition Hall 2+3
Time 10월 19일 (목요일) 11:00~12:30
Code ENVR.P-514
Subject Oxidation of Bisphenol A by activated persulfate using Iron(II) entrapped chitosan/alginate substrate
Authors Yu-Gyeong Kang, YOON-SEOK CHANG 1,*
Division of Environmental Science and Engineering, Pohang University of Science and Technology , Korea
1Division of Environmental Science and Engineering, Pohang University of Science and Technology, Korea
Abstract The oxidative ability of persulfate (PS) has been used to effectively treat a wide range of environmental contaminants. A novel Fe(II) containing chitosan/alginate composite (Fe-Chitoal) was prepared by the simple cross-linking reaction for the activation of PS to degrade bisphenol A (BPA). The prepared Fe-Chitoal was characterized by SEM, EDX, FT-IR and XPS. The result indicated that the Fe was imprinted successfully into the composite. The Fe(II) (0.35 mM) was released from Chitoal (1g/L) without PS and Fe(III) was re-adsorbed after reaction with PS. Higher removal efficiency for BPA was obtained with PS/Fe-Chitoal than using homogeneous Fe(II) with PS. Effects of different experimental conditions like PS and Fe-Chitoal dosages, pH and anions (Cl-, SO42-, NO3-, HCO3-) on the removal of BPA were investigated. The removal increased as the PS and Fe-Chitoal dosage increased and high efficiency was maintained in the pH range of 2-10 and decreased dramatically at pH 12. The removal efficiency was also maintained with 100 mM of high anion concentration. The main mechanism of PS/Fe-Chitoal was producing radicals such as ·OH and SO4•−.
E-mail ygkang74@postech.ac.kr