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KMID : 1024520180270121215
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Journal of the Environmental Sciences
2018 Volume.27 No. 12 p.1215 ~ p.1226
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Removal of Cu and Sr Ions using Adsorbent Obtained by Immobilizing Zeolite Synthesized from Jeju Volcanic Rocks in Polyacrylonitrile
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Lee Chang-Han
Lee Min-Gyu
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Abstract
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In this study, PAN-SZ (polyacrylonitrile scoria zeolite) beads were prepared by immobilizing Na-A zeolite (SZ-A) synthesized from Jeju volcanic rocks (scoria) on the polymer PAN. FT-IR and TGA analysis results confirmed that the SZ-A was immobilized in the PAN-SZ beads. SEM images showed that the PAN-SZ beads are a spherical shape with 2 mm diameter and exhibit a porous inner structure inside the bead. The most suitable mixing ratio of PAN to SZ-A as the adsorbent for removing Sr ions was PAN/SZ-A = 0.2 g/0.3 g. The adsorption kinetic data for Cu and Sr ions were fitted well with the pseudo-second-order model. The Cu and Sr ion uptakes followed a Langmuir isotherm model and the maximum adsorption capacities at 20°C were 84.03 mg/g and 75.19 mg/g, respectively. The amount of Sr ion adsorbed by SZ-A on the PAN-SZ beads was about 160 mg/g, which was similar to that adsorbed by SZ-Apowder. Thus, the PAN-SZ beads prepared in this study are considered to be effective adsorbents for removing metal ions in aqueous solutions.
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KEYWORD
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Adsorption, Polyacrylonitrile, Strontium, Copper, Volcanic rock, Scoria, Zeolite
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