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Fast and Efficient Removal of Hexavalent Chromium from Water by Iron Oxide Particles |
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| รหัสดีโอไอ | |
| Creator | Duangta Kitkaew, Athit Phetrak, Sumate Ampawong, Rachaneekorn Mingkhwan, Doungkamon Phihusut, Kamolnetr Okanurak and Chongrak PolprasertChongrak Polprasert |
| Title | Fast and Efficient Removal of Hexavalent Chromium from Water by Iron Oxide Particles |
| Publisher | Faculty of Environment and Resource Studies, Mahidol University |
| Publication Year | 2561 |
| Journal Title | Environment and Natural Resources Journal |
| Journal Vol. | 16 |
| Journal No. | 1 |
| Page no. | 91 to 100 |
| Keyword | Hexavalent chromium/ Iron oxide particles/ Adsorption/ Pseudo-second order model |
| ISSN | 1686-5456 |
| Abstract | Iron oxide particles (IOPs) were synthesized by chemical co-precipitation technique and further used as an adsorbent in removing hexavalent chromium (Cr(VI)) from aqueous solutions during batch adsorption. The IOP adsorbent had specific surface area of 65 m2/g, total pore volume of 0.25 cm3/g and mostly contained a mesoporous structure. The analysis of scanning and transmission electron microscopy indicated that the adsorbent contained a substantial amount of iron oxide of about 66%, which was well distributed throughout the adsorbent. The IOP adsorbent showed a rapid and efficient Cr(VI) removal that followed Langmuir adsorption isotherm model with maximum adsorption capacity of 2.39 mg-Cr(VI)/g-IOP, demonstrating a monolayer formation on the adsorptive sites of IOP. The kinetic adsorption of Cr(VI) on the IOP followed the pseudo-second-order model, suggesting chemisorption. Thus, the IOP adsorbent provides a potentially effective technology in eliminating of Cr(VI) from water since it can remove appreciable amounts of Cr(VI) with a relatively short contact time of 30 min. |
