Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres
With the rapid development of nuclear energy, the development of environmentally friendly bio-based adsorbents is of great significance for controlling radioactive nuclide pollution. A novel tannic acid and sodium alginate (TA/SA) composite microsphere was prepared using a mixed crosslinking method....
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Editorial Office of Industrial Water Treatment
2025-01-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1233 |
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| author | LIU Qing HUANG Jianbin LI Weifan ZHAO Guodong YANG Jingjing |
| author_facet | LIU Qing HUANG Jianbin LI Weifan ZHAO Guodong YANG Jingjing |
| author_sort | LIU Qing |
| collection | DOAJ |
| description | With the rapid development of nuclear energy, the development of environmentally friendly bio-based adsorbents is of great significance for controlling radioactive nuclide pollution. A novel tannic acid and sodium alginate (TA/SA) composite microsphere was prepared using a mixed crosslinking method. The effects of TA/SA mass ratio, solution pH, initial concentration of U(Ⅵ), contact time, and temperature on the adsorption behavior of U(Ⅵ) by TA/SA microspheres were investigated, and the adsorption kinetics and thermodynamics were studied. The adsorption mechanism of TA/SA microspheres on U (Ⅵ) was also explored. The results showed that the optimal mass ratio of TA to SA was 1∶2, and pH had little effect on the adsorption of U(Ⅵ) by TA/SA microspheres. When the mass concentration of U(Ⅵ) was 50 mg/L, the dosage of TA/SA microspheres was 0.1 g/L, the solution pH was 4, the temperature was 323 K, and the contact time was 2 hours, the maximum adsorption capacity of TA/SA microspheres for U(Ⅵ) was 263.42 mg/g. The adsorption behavior conformed to the quasi second order kinetic model and Freundlich isotherm adsorption model. The adsorption of U(Ⅵ) by TA/SA microspheres was a spontaneous endothermic process, and the reaction could be divided into three stages, including surface adsorption, mesopore diffusion, and micropore diffusion. TA/SA microspheres had an irregular grooved surface and a three-dimensional network structure with numerous openings inside. The reduction reaction played a dominant role in the adsorption of U (Ⅵ) by TA/SA microspheres. |
| format | Article |
| id | doaj-art-1de074102c974b5ca63bc781db8c830e |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-1de074102c974b5ca63bc781db8c830e2025-01-24T07:59:03ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2025-01-01451586510.19965/j.cnki.iwt.2023-12331005-829X（2025）01-0058-08Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheresLIU Qing0HUANG Jianbin1LI Weifan2ZHAO Guodong3YANG Jingjing4School of Civil Engineering, University of South China, Hengyang421001, ChinaSchool of Civil Engineering, University of South China, Hengyang421001, ChinaSchool of Civil Engineering, University of South China, Hengyang421001, ChinaSchool of Resources, Environment and Safety Engineering, University of South China, Hengyang421001, ChinaSchool of Civil Engineering, University of South China, Hengyang421001, ChinaWith the rapid development of nuclear energy, the development of environmentally friendly bio-based adsorbents is of great significance for controlling radioactive nuclide pollution. A novel tannic acid and sodium alginate (TA/SA) composite microsphere was prepared using a mixed crosslinking method. The effects of TA/SA mass ratio, solution pH, initial concentration of U(Ⅵ), contact time, and temperature on the adsorption behavior of U(Ⅵ) by TA/SA microspheres were investigated, and the adsorption kinetics and thermodynamics were studied. The adsorption mechanism of TA/SA microspheres on U (Ⅵ) was also explored. The results showed that the optimal mass ratio of TA to SA was 1∶2, and pH had little effect on the adsorption of U(Ⅵ) by TA/SA microspheres. When the mass concentration of U(Ⅵ) was 50 mg/L, the dosage of TA/SA microspheres was 0.1 g/L, the solution pH was 4, the temperature was 323 K, and the contact time was 2 hours, the maximum adsorption capacity of TA/SA microspheres for U(Ⅵ) was 263.42 mg/g. The adsorption behavior conformed to the quasi second order kinetic model and Freundlich isotherm adsorption model. The adsorption of U(Ⅵ) by TA/SA microspheres was a spontaneous endothermic process, and the reaction could be divided into three stages, including surface adsorption, mesopore diffusion, and micropore diffusion. TA/SA microspheres had an irregular grooved surface and a three-dimensional network structure with numerous openings inside. The reduction reaction played a dominant role in the adsorption of U (Ⅵ) by TA/SA microspheres.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1233tanninssodium alginateadsorptionradioactive nuclideuranium |
| spellingShingle | LIU Qing HUANG Jianbin LI Weifan ZHAO Guodong YANG Jingjing Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres Gongye shui chuli tannins sodium alginate adsorption radioactive nuclide uranium |
| title | Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres |
| title_full | Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres |
| title_fullStr | Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres |
| title_full_unstemmed | Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres |
| title_short | Performance of U(Ⅵ) enrichment by tannic acid sodium and alginate composite microspheres |
| title_sort | performance of u vi enrichment by tannic acid sodium and alginate composite microspheres |
| topic | tannins sodium alginate adsorption radioactive nuclide uranium |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1233 |
| work_keys_str_mv | AT liuqing performanceofuvienrichmentbytannicacidsodiumandalginatecompositemicrospheres AT huangjianbin performanceofuvienrichmentbytannicacidsodiumandalginatecompositemicrospheres AT liweifan performanceofuvienrichmentbytannicacidsodiumandalginatecompositemicrospheres AT zhaoguodong performanceofuvienrichmentbytannicacidsodiumandalginatecompositemicrospheres AT yangjingjing performanceofuvienrichmentbytannicacidsodiumandalginatecompositemicrospheres |