{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,19]],"date-time":"2026-04-19T17:20:35Z","timestamp":1776619235781,"version":"3.51.2"},"reference-count":100,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,2,11]],"date-time":"2023-02-11T00:00:00Z","timestamp":1676073600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["U1967218"],"award-info":[{"award-number":["U1967218"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["11975082"],"award-info":[{"award-number":["11975082"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12275124"],"award-info":[{"award-number":["12275124"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Gels"],"abstract":"<jats:p>Although Cs(I) and Sr(II) are not strategic and hazardous metal ions, their recovery from aqueous solutions is of great concern for the nuclear industry. The objective of this work consists of designing a new sorbent for the simultaneous recovery of these metals with selectivity against other metals. The strategy is based on the functionalization of algal\/polyethyleneimine hydrogel beads by phosphonation. The materials are characterized by textural, thermo-degradation, FTIR, elemental, titration, and SEM-EDX analyses to confirm the chemical modification. To evaluate the validity of this modification, the sorption of Cs(I) and Sr(II) is compared with pristine support under different operating conditions: the pH effect, kinetics, and isotherms are investigated in mono-component and binary solutions, before investigating the selectivity (against competitor metals) and the possibility to reuse the sorbent. The functionalized sorbent shows a preference for Sr(II), enhanced sorption capacities, a higher stability at recycling, and greater selectivity against alkali, alkaline-earth, and heavy metal ions. Finally, the sorption properties are compared for Cs(I) and Sr(II) removal in a complex solution (seawater sample). The combination of these results confirms the superiority of phosphonated sorbent over pristine support with promising performances to be further evaluated with effluents containing radionuclides.<\/jats:p>","DOI":"10.3390\/gels9020152","type":"journal-article","created":{"date-parts":[[2023,2,13]],"date-time":"2023-02-13T01:48:56Z","timestamp":1676252936000},"page":"152","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Phosphonation of Alginate\u2013Polyethyleneimine Beads for the Enhanced Removal of Cs(I) and Sr(II) from Aqueous Solutions"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6117-6753","authenticated-orcid":false,"given":"Khalid A. M.","family":"Salih","sequence":"first","affiliation":[{"name":"School of Metallurgy and Environment, Central South University, Changsha 410083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kanggen","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Metallurgy and Environment, Central South University, Changsha 410083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8935-6884","authenticated-orcid":false,"given":"Mohammed F.","family":"Hamza","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, University of South China, Hengyang 421001, China"},{"name":"Nuclear Materials Authority, POB 530, El-Maadi, Cairo 11728, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hamed","family":"Mira","sequence":"additional","affiliation":[{"name":"Nuclear Materials Authority, POB 530, El-Maadi, Cairo 11728, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3821-9078","authenticated-orcid":false,"given":"Yuezhou","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, University of South China, Hengyang 421001, China"},{"name":"School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9573-5960","authenticated-orcid":false,"given":"Shunyan","family":"Ning","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology, University of South China, Hengyang 421001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2767-6305","authenticated-orcid":false,"given":"Eric","family":"Guibal","sequence":"additional","affiliation":[{"name":"Polymers Composites and Hybrids (PCH), IMT Mines Ales, CEDEX, F-30319 Al\u00e8s, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Waheed M.","family":"Salem","sequence":"additional","affiliation":[{"name":"Medical Labs Department, Faculty of Applied Health Science Technology, Menoufia University, Shebine El-Koam 6131567, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,11]]},"reference":[{"key":"ref_1","unstructured":"RSC (2021, May 05). 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