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http://dx.doi.org/10.4491/KSEE.2017.39.3.112

Chromium(VI) Removal from Aqueous Solution using Acrylic Ion Exchange Fiber  

Nam, Aram (KIST Center for Water Resource Cycle Research)
Park, Jeong-Ann (KIST Center for Water Resource Cycle Research)
Do, Taegu (KIST Center for Urban Energy System Research)
Choi, Jae-Woo (KIST Center for Water Resource Cycle Research)
Choi, Ungsu (KIST Center for Urban Energy System Research)
Kim, Kyung Nam (Graduate school of energy and environment (Green School), Korea University)
Yun, Seong-Taek (Graduate school of energy and environment (Green School), Korea University)
Lee, Sanghyup (KIST Center for Water Resource Cycle Research)
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Abstract
Ion exchange fiber, PADD was synthesized by the reaction between PAN based acrylic fiber and DETA with $AlCl_3{\cdot}6H_2O$, and was analyzed by FT-IR and SEM to investigate its characteristics. The experimental results of Cr(VI) removal by PADD were better fitted with Langmuir adsorption isotherm, and the maximum uptake value ($Q_{max}$) was calculated to be 6.93 mmol/g. The kinetic data can be well described by Lagergen pseudo-second order rate model. The Cr(VI) adsorption capacity of PADD was 4.11 mmol/g at pH 2, which shows the effect of pH changes on the removal of Cr(VI). The adsorption selectivity of Cr(VI) was higher than phosphate and As(V). Total ion exchange capacity of PADD was 4.70 mmol/g, which was measured by acid-base back titration.
Keywords
Chromium (VI); Acrylic Fiber; Ion Exchange Fiber; Removal;
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