DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Lee, Jae Woo | - |
dc.contributor.advisor | 이재우 | - |
dc.contributor.author | Bae, Kyeong-Hui | - |
dc.date.accessioned | 2019-09-03T02:43:56Z | - |
dc.date.available | 2019-09-03T02:43:56Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734188&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/266354 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2018.2,[36 p. :] | - |
dc.description.abstract | The potassium copper hexacyanoferrate-immobilized magnetic hydrogel bead (HCF-bead) was synthesized via a double cross-linking with $Fe_{3+}$ ions and freeze-thaw for $Cs_+$ adsorption from contaminated environments. The hydrogel was composed of poly(vinyl alcohol) (PVA) and carboxymethyl cellulose (CMC), in which the citric acid functionalized $Fe_3O_4$ was incorporated to facilitate the dispersion of KCuHCF nanoparticles and magnetic separation of the used adsorbent. The HCF-bead can remove moderately high $Cs_+$ up to 69.2 mg/g. Rapid kinetics enables 99% $Cs_+$ uptake within 4 h from the $Cs_+$ solution (10.5 ppm, V/m = 1000 mL/g). Above all, the HCF-bead exhibits remarkable $Cs_+$ sorption performances in terms of selectivity and stability. The adsorbent still maintains its impressive performances even in seawater with considerably high distribution coefficient Kd value of $1.09 \times 104$ mL/g at an extremely low $Cs_+$ concentration (1.05 ppm). Furthermore, the HCF-bead reveals outstanding pH stability with $Cs_+$ removal efficiency >99.5 % across a broad pH range from 4 to 11. The form of bead allows simultaneous application to the continuous column operation and the batch mode operation for magnetic separation after $Cs_+$ removal. From capable and practical perspectives, the HCF-bead is a highly effective and promising adsorbent for the selective removal of $Cs_+$. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Cesium adsorption▼aPotassium copper hexacyanoferrate▼aPoly(vinyl alcohol) hydrogel▼aCellulose hydrogel▼aMagnetic hydrogel | - |
dc.subject | Bead | - |
dc.subject | 세슘 흡착▼a헥사시아노철산염▼a폴리비닐알코올▼a셀룰로오스▼a자성▼a하이드로겔▼a비드 | - |
dc.title | Synthesis of potassium copper hexacyanoferrate - magnetic hydrogel composite beads for effective cesium adsorption | - |
dc.title.alternative | 효과적인 세슘 흡착을 위한 헥사시아노철산염 - 자성 하이드로겔 복합체 비드 합성 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 배경희 | - |
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