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ISSN : 1225-4517(Print)
ISSN : 2287-3503(Online)
Journal of Environmental Science International Vol.27 No.11 pp.1095-1104

Adsorption Characteristics of Bisphenol A Using Activated Carbon Based on Waste Citrus Peel and Surface-Modified with P2O5

Sang-Kyu Kam, Myeong-Chan Kim1), Min-Gyu Lee2)*
Department of Environmental Engineering, Jeju National University, Jeju 63243, Korea
1)Research Institute of Health & Environment, Jeju Special-Governing Province, Jeju 63142, Korea
2)Department of Chemical Engineering, Pukyong National University, Busan 48547, Korea
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*Corresponding author: Min-Gyu Lee, Department of Chemical Engineering, Pukyong National University, Busan 48547, Korea Phone : +82-51-629-6435


The adsorption characteristics of bisphenol A (BPA) were investigated using activated carbon based on waste citrus peel (which is abandoned in large quantities in Jeju Island), denoted as WCP-AC, and surface-modified with various P2O5 concentrations (WCP-SM-AC). Moreover, coconut-based activated carbon (which is marketed in large amounts) was surface-modified in an identical manner for comparison. The adsorption equilibrium of BPA using the activated carbons before and after surface modification was obtained at nearly 48 h. The adsorption process of BPA by activated carbons and surface-modified activated carbons was well-described by the pseudo second-order kinetic model. The experimental data in the adsorption isotherm followed the Langmuir isotherm model. With increasing P2O5 concentration (250-2,000 mg/L), the amounts of BPA adsorbed by WCP-SM-AC increased till 1,000 mg/L of P2O5; however, above 1,000 mg/L of P2O5, the same amounts adsorbed at 1,000 mg/L of P2O5 were obtained. With increasing reaction temperature, the reaction rate increased, but the adsorbed amounts decreased, especially for the activated carbon before surface modification. The amounts of BPA adsorbed by WCP-AC and WCP-SM-AC were similar in the pH range of 5-9, but significantly decreased at pH 11, and increased with increasing ionic strength due to screening and salting-out effects.

P2O5로 표면 개질한 폐감귤박 활성탄에 의한 Bisphenol A의 흡착 특성

감상규, 김명찬1), 이민규2)*
제주대학교 환경공학과, 1)제주특별자치도 보건환경연구원, 2)부경대학교 화학공학과