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KMID : 1024520140230091583
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Journal of the Environmental Sciences
2014 Volume.23 No. 9 p.1583 ~ p.1591
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Preparation of PVA-D2EHPA/TOPO Beads by Immobilizing Extractants D2EHPA and TOPO with PVA and Removal Characteristics of Copper Ions from Aqueous Solution
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Kam Sang-Kyu
Park Jeong-Min
Lee Min-Gyu
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Abstract
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PVA-D2EHPA/TOPO beads containing two extractants, di-(2-ethylhexyl) phosphoric acid (D2EHPA) and trioctylphoshine oxide (TOPO) were prepared for the removal of copper ions from aqueous solution. The prepared PVA-D2EHPA/TOPO beads were characterized by SEM and FT-IR. The removal characteristics of copper ions by PVA-D2EHPA/TOPO beads was investigated using batch and continuous systems. In batch experiments, the maximum removal capacity calculated from Langmuir isotherm model was 18.6 mg/g and the optimal pH was in the range of 4.5~6. The continuous experiments showed that the removal capacity of copper ions increased with increasing inlet copper ion concentrations and bed heights, but decreased with increasing inlet flow rates.
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KEYWORD
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Copper, Di-(2-ethylhexyl) phosphoric acid (D2EHPA), Extraction, Immobilization, Polyvinyl alcohol (PVA), Trioctylphoshine oxide (TOPO)
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