Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent
For the adsorption and recovery of rare earth elements from aqueous nitric acid, solid-phase extraction resins were prepared by impregnating and immobilizing of bis(2-ethylhexyl)phosphoric acid extractant into the macroporous silica-based polymeric (SiO 2 -P) particles. It was found that bis(2-ethyl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2018-05-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617417748112 |
| _version_ | 1797282424466440192 |
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| author | Qiding Shu Afshin Khayambashi Xinpeng Wang Yuezhou Wei |
| author_facet | Qiding Shu Afshin Khayambashi Xinpeng Wang Yuezhou Wei |
| author_sort | Qiding Shu |
| collection | DOAJ |
| description | For the adsorption and recovery of rare earth elements from aqueous nitric acid, solid-phase extraction resins were prepared by impregnating and immobilizing of bis(2-ethylhexyl)phosphoric acid extractant into the macroporous silica-based polymeric (SiO 2 -P) particles. It was found that bis(2-ethylhexyl)phosphoric acid/SiO 2 -P had higher adsorption distribution coefficient for heavy rare earth elements than for light rare earth elements. The adsorption capacity of Gd(III) was observed to be 0.315 mmol g −1 by bis(2-ethylhexyl)phosphoric acid/SiO 2 -P in 0.1 M HNO 3 at 298 K, which increased slightly when increasing temperature from 298 to 323 K. The adsorption isotherms of Gd(III) matched well with the Langmuir and Freundlich models. The obtained thermodynamic parameters (ΔH o and ΔG o ) showed that the adsorption of Gd(III) by bis(2-ethylhexyl)phosphoric acid/SiO 2 -P was a spontaneous and exothermic process. This study also evaluated the chemical stability of bis(2-ethylhexyl)phosphoric acid/SiO 2 -P treated with nitric acid at different temperatures and demonstrated that bis(2-ethylhexyl)phosphoric acid/SiO 2 -P had considerable stability against nitric acid and heat. |
| first_indexed | 2024-03-07T17:12:49Z |
| format | Article |
| id | doaj.art-5a7b2ee20093442aaf5d558605fbb1b7 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:12:49Z |
| publishDate | 2018-05-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-5a7b2ee20093442aaf5d558605fbb1b72024-03-03T00:40:46ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382018-05-013610.1177/0263617417748112Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbentQiding ShuAfshin KhayambashiXinpeng WangYuezhou WeiFor the adsorption and recovery of rare earth elements from aqueous nitric acid, solid-phase extraction resins were prepared by impregnating and immobilizing of bis(2-ethylhexyl)phosphoric acid extractant into the macroporous silica-based polymeric (SiO 2 -P) particles. It was found that bis(2-ethylhexyl)phosphoric acid/SiO 2 -P had higher adsorption distribution coefficient for heavy rare earth elements than for light rare earth elements. The adsorption capacity of Gd(III) was observed to be 0.315 mmol g −1 by bis(2-ethylhexyl)phosphoric acid/SiO 2 -P in 0.1 M HNO 3 at 298 K, which increased slightly when increasing temperature from 298 to 323 K. The adsorption isotherms of Gd(III) matched well with the Langmuir and Freundlich models. The obtained thermodynamic parameters (ΔH o and ΔG o ) showed that the adsorption of Gd(III) by bis(2-ethylhexyl)phosphoric acid/SiO 2 -P was a spontaneous and exothermic process. This study also evaluated the chemical stability of bis(2-ethylhexyl)phosphoric acid/SiO 2 -P treated with nitric acid at different temperatures and demonstrated that bis(2-ethylhexyl)phosphoric acid/SiO 2 -P had considerable stability against nitric acid and heat.https://doi.org/10.1177/0263617417748112 |
| spellingShingle | Qiding Shu Afshin Khayambashi Xinpeng Wang Yuezhou Wei Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent Adsorption Science & Technology |
| title | Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent |
| title_full | Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent |
| title_fullStr | Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent |
| title_full_unstemmed | Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent |
| title_short | Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent |
| title_sort | studies on adsorption of rare earth elements from nitric acid solution with macroporous silica based bis 2 ethylhexyl phosphoric acid impregnated polymeric adsorbent |
| url | https://doi.org/10.1177/0263617417748112 |
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