Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Ryu, Jungho | - |
dc.contributor.author | Kim, Soonhyun | - |
dc.contributor.author | Hong, Hye-Jin | - |
dc.contributor.author | Hong, Jeongsik | - |
dc.contributor.author | Kim, Minsun | - |
dc.contributor.author | Ryu, Taegong | - |
dc.contributor.author | Park, In-Su | - |
dc.contributor.author | Chung, Kang-Sup | - |
dc.contributor.author | Jang, Jum Suk | - |
dc.contributor.author | Kim, Byoung-Gyu | - |
dc.date.available | 2017-07-04T00:48:19Z | - |
dc.date.created | 2017-04-10 | - |
dc.date.issued | 2016-11-15 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11750/2128 | - |
dc.description.abstract | Strontium ion (Sr2+) separation from seawater has attracted attention for radioactive pollutants removal and for Sr2+ recovery. Herein, we synthesized titanate nanotubes (TiNTs) via a simple hydrothermal reaction, characterized their physicochemical properties, and systematically evaluated Sr2+ sorption behavior under various reaction conditions corresponding to seawater environments. The synthesized TiNTs exhibited a fibril-type nanotube structure with a high specific surface area (260m2/g). Sr2+ adsorption on TiNTs rapidly occurred following a pseudo-second-order kinetic model and was in good agreement with the Langmuir isotherm model, indicating a maximum adsorption capacity of 97mg/g. Based on the Sr2+ uptake and Na+ release with a stoichiometric balance, the Sr2+ sorption mechanism on TiNTs was ion exchange between Na+ in the TiNT lattice and Sr2+ in the solution phase, as confirmed by XRD and Raman analysis. Among the competitive ions, Ca2+ significantly hindered Sr2+ sorption on TiNTs, whereas Na+ only slightly affected Sr2+ sorption, despite the Na+ exchange sorption mechanism. The effect of Ca2+ on Sr2+ sorption was evaluated by introducing a distribution coefficient (Kd) as a critical factor in determining the selectivity, which revealed a slightly higher selectivity for Sr2+. The Sr2+ adsorption-desorption test in a real seawater medium enabled the determination of Kd and the concentration factor (CF) for co-existing matrix ions in seawater; these values were evaluated for Sr2+ removal and recovery from seawater. TiNTs were regenerated by acid treatment and reused through consecutive adsorption-desorption experiments. While most studies addressing Sr2+ sorption using TiNTs aimed for extraction from wastewater and radioactive wastewater, this study elucidated Sr2+ sorption behavior under seawater conditions and provided insights into developing the removal and recovery processes from seawater. © 2016 | - |
dc.publisher | Elsevier | - |
dc.title | Strontium ion (Sr2+) separation from seawater by hydrothermally structured titanate nanotubes: Removal vs. recovery | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2016.06.131 | - |
dc.identifier.scopusid | 2-s2.0-84977110972 | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.304, pp.503 - 510 | - |
dc.subject.keywordAuthor | Strontium | - |
dc.subject.keywordAuthor | Seawater | - |
dc.subject.keywordAuthor | Titanate nanotubes | - |
dc.subject.keywordAuthor | Recovery | - |
dc.subject.keywordAuthor | Separation | - |
dc.subject.keywordPlus | ADSORBENTS | - |
dc.subject.keywordPlus | Adsorption | - |
dc.subject.keywordPlus | COMPOSITE | - |
dc.subject.keywordPlus | DESORPTION | - |
dc.subject.keywordPlus | Distribution Coefficient | - |
dc.subject.keywordPlus | EFFICIENT | - |
dc.subject.keywordPlus | EXCHANGE | - |
dc.subject.keywordPlus | EXTRACTION | - |
dc.subject.keywordPlus | FUKUSHIMA | - |
dc.subject.keywordPlus | HEAVY-METAL IONS | - |
dc.subject.keywordPlus | High Specific Surface Area | - |
dc.subject.keywordPlus | Ion Exchange | - |
dc.subject.keywordPlus | Ions | - |
dc.subject.keywordPlus | Isotherms | - |
dc.subject.keywordPlus | Langmuir Isotherm Models | - |
dc.subject.keywordPlus | Mesoporous Materials | - |
dc.subject.keywordPlus | NANOTUBES | - |
dc.subject.keywordPlus | Physicochemical Property | - |
dc.subject.keywordPlus | Pseudo-Second-Order Kinetic Models | - |
dc.subject.keywordPlus | Radioactive Pollutants | - |
dc.subject.keywordPlus | RADIOACTIVE STRONTIUM | - |
dc.subject.keywordPlus | Radioactivity | - |
dc.subject.keywordPlus | RECOVERY | - |
dc.subject.keywordPlus | Removal and Recoveries | - |
dc.subject.keywordPlus | Seawater | - |
dc.subject.keywordPlus | Separation | - |
dc.subject.keywordPlus | Sorption | - |
dc.subject.keywordPlus | Strontium | - |
dc.subject.keywordPlus | Strontium Titanates | - |
dc.subject.keywordPlus | Titanate Nanotubes | - |
dc.subject.keywordPlus | Titanium Compounds | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | Yarn | - |
dc.citation.endPage | 510 | - |
dc.citation.startPage | 503 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 304 | - |
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