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http://dx.doi.org/10.14478/ace.2014.1126

Effects of the Fluorination of Activated Carbons on the Chromium Ion Adsorption  

Kim, Min-Ji (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Jung, Min-Jung (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Choi, Suk Soon (Department of Biological and Environmental Engineering, Semyung University)
Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Publication Information
Applied Chemistry for Engineering / v.26, no.1, 2015 , pp. 92-98 More about this Journal
Abstract
In this study, phenol-based activated carbons (ACs) were fluorinated at various fluorine partial pressures (0.01~0.03 MPa) and the $Cr^{6+}$ ion adsorption of fluorinated ACs was investigated. According to BET and XPS results, the specific surface area and total pore volume of fluorinated ACs increased by 24.7 and 55.8%, respectively, and fluorine functional groups were introduced to AC surface. The most optimized condition of $Cr^{6+}$ ion adsorption was confirmed at the fluorine partial pressure of 0.02 MPa. And also the removal efficiency of $Cr^{6+}$ ion was up to 98% at 300 mg/L of the initial concentration, and these results showed an approximately three-fold increase compared to that of using untreated ACs. Furthermore, the $Cr^{6+}$ ion adsorption of fluorinated ACs was completed in less than 30 min in contrast with untreated ACs, which was expected to be an increase of the affinity between $Cr^{6+}$ ions and ACs surfaces by fluorination.
Keywords
Cr(VI); removal; adsorption; fluorination; activated carbon;
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