Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions
Because of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially availabl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-02-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/11/2/297 |
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| author | Jongho Kim Chan Woo Park Kune-Woo Lee Taek Seung Lee |
| author_facet | Jongho Kim Chan Woo Park Kune-Woo Lee Taek Seung Lee |
| author_sort | Jongho Kim |
| collection | DOAJ |
| description | Because of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially available, gel-type, anion-exchange resins (AERs), which are based on cross-linked polystyrene with positive tertiary amine groups. Because of the positive charge on AERs, they could adsorb EDTA effectively even in a solution mixed with ions of cesium (Cs) via electrostatic attraction. Because EDTA adsorption by cation-exchange resins (CERs) was not possible, it was concluded that the negative charges on CERs do not contribute to the interaction with EDTA. The maximum adsorption capacity (<i>q</i><sub>max</sub>) of AER (2 g/L) for EDTA removal, calculated by the Langmuir isotherm model was 0.47 mmol/g for initial EDTA concentrations in the range of 0.01⁻1 mM in the EDTA/Cs mixed solution. The Langmuir isotherm model was found to be suitable for EDTA adsorption on AERs, indicative of monolayer adsorption. The results clearly suggested that the AERs could efficiently remove EDTA, regardless of the presence of nuclides, such as Cs ions in the aqueous solution. |
| first_indexed | 2024-04-11T22:55:46Z |
| format | Article |
| id | doaj.art-c0f184de23da4fe6a258a11b16c64b44 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-04-11T22:55:46Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-c0f184de23da4fe6a258a11b16c64b442022-12-22T03:58:25ZengMDPI AGPolymers2073-43602019-02-0111229710.3390/polym11020297polym11020297Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs IonsJongho Kim0Chan Woo Park1Kune-Woo Lee2Taek Seung Lee3Organic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, KoreaDecontamination and Decommissioning Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, KoreaOrganic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, KoreaOrganic and Optoelectronic Materials Laboratory, Department of Organic Materials Engineering, Chungnam National University, Daejeon 34134, KoreaBecause of its excellent chelating property, ethylenediaminetetraacetic acid (EDTA) is used as a complex agent, not only for heavy metals, but also for radioactive isotopes during the decontamination of nuclear facilities. The removal of EDTA was investigated by adsorption with commercially available, gel-type, anion-exchange resins (AERs), which are based on cross-linked polystyrene with positive tertiary amine groups. Because of the positive charge on AERs, they could adsorb EDTA effectively even in a solution mixed with ions of cesium (Cs) via electrostatic attraction. Because EDTA adsorption by cation-exchange resins (CERs) was not possible, it was concluded that the negative charges on CERs do not contribute to the interaction with EDTA. The maximum adsorption capacity (<i>q</i><sub>max</sub>) of AER (2 g/L) for EDTA removal, calculated by the Langmuir isotherm model was 0.47 mmol/g for initial EDTA concentrations in the range of 0.01⁻1 mM in the EDTA/Cs mixed solution. The Langmuir isotherm model was found to be suitable for EDTA adsorption on AERs, indicative of monolayer adsorption. The results clearly suggested that the AERs could efficiently remove EDTA, regardless of the presence of nuclides, such as Cs ions in the aqueous solution.https://www.mdpi.com/2073-4360/11/2/297ethylenediaminetetraacetic acidion exchange resinCs ionsradioactive liquid wasteadsorption |
| spellingShingle | Jongho Kim Chan Woo Park Kune-Woo Lee Taek Seung Lee Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions Polymers ethylenediaminetetraacetic acid ion exchange resin Cs ions radioactive liquid waste adsorption |
| title | Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions |
| title_full | Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions |
| title_fullStr | Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions |
| title_full_unstemmed | Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions |
| title_short | Adsorption of Ethylenediaminetetraacetic Acid on a Gel-Type Ion-Exchange Resin for Purification of Liquid Waste Containing Cs Ions |
| title_sort | adsorption of ethylenediaminetetraacetic acid on a gel type ion exchange resin for purification of liquid waste containing cs ions |
| topic | ethylenediaminetetraacetic acid ion exchange resin Cs ions radioactive liquid waste adsorption |
| url | https://www.mdpi.com/2073-4360/11/2/297 |
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