{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T09:03:26Z","timestamp":1790067806413,"version":"4.0.1"},"reference-count":33,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T00:00:00Z","timestamp":1789603200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Projects of Talents Recruitment of GDUPT","award":["2023rcyj2006"],"award-info":[{"award-number":["2023rcyj2006"]}]},{"name":"Characteristic Innovation Projects in Ordinary Universities in Guangdong Province","award":["2025KTSCX079"],"award-info":[{"award-number":["2025KTSCX079"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["2024A1515110011"],"award-info":[{"award-number":["2024A1515110011"]}]},{"name":"Guangdong Basic and Applied Basic Research Foundation","award":["2026A151010932"],"award-info":[{"award-number":["2026A151010932"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The development of high-performance adsorbents with porous structure is very important for efficient uranium extraction from complex aqueous media. Here, porous poly (amidoxime)\/poly (vinyl alcohol) (PAO\/PVA) microspheres were fabricated by liquid nitrogen-assisted molding and subsequent vacuum freeze-drying procedures. The as-prepared composites with a PAO:PVA mass ratio of 4:1 have the superior adsorption capability at an optimal pH of 6. Its theoretical maximum adsorption capacity was estimated to be 330.2 mg g\u22121 using the Langmuir model. It also exhibited good reusability for U(VI) uptake with a high capacity retention of more than 85% after five consecutive adsorption\u2013desorption cycles. In simulated seawater containing competing ions, the PAO\/PVA microspheres can preferentially capture U(VI), achieving the highest adsorption capacity of 5.06 mg g\u22121, largest distribution coefficient of 65.71 L g\u22121 and greatest removal efficiency of 77%. The mechanism of PAO\/PVA for U(VI) adsorption was further studied by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) measurements. It was found that the N\/O donor atoms derived from amidoxime were the main binding sites for U(VI). This work may provide motivation for the rational design and construction of efficient PAO-based composites for uranium adsorption.<\/jats:p>","DOI":"10.3390\/ma19183950","type":"journal-article","created":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T11:41:35Z","timestamp":1789645295000},"page":"3950","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Porous PAO\/PVA Microspheres for Efficient U(VI) Capture"],"prefix":"10.3390","volume":"19","author":[{"given":"Zenghui","family":"Wan","sequence":"first","affiliation":[{"name":"Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, 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and Intelligent Equipment, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"}]},{"given":"Jingshui","family":"Xu","sequence":"additional","affiliation":[{"name":"Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China"},{"name":"Guangdong Provincial Key Laboratory of Petrochemical Equipment Fault Diagnosis, School of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"resources","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"}]},{"given":"Suhua","family":"Wang","sequence":"additional","affiliation":[{"name":"Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"resources","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"120945","DOI":"10.1016\/j.jece.2025.120945","article-title":"Uranium extraction from seawater: Progress and challenges","volume":"14","author":"Yang","year":"2026","journal-title":"J. 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