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To address this bottleneck problem, an advanced strategy for selectively extracting\n                    <jats:sup>212<\/jats:sup>\n                    Pb and\n                    <jats:sup>212<\/jats:sup>\n                    Bi from the decay chain of\n                    <jats:sup>232<\/jats:sup>\n                    Th is first proposed by using an efficient porous silica\u2010supported anion exchanger in bromide medium. The selective adsorption mechanisms of the resin for Pb(II) and Bi(III) in bromide medium are first clarified through spectroscopic analyses and theoretical calculations. Using the novel method and exchanger, 2.07 MBq of\n                    <jats:sup>212<\/jats:sup>\n                    \u00a0Pb is successfully separated from\n                    <jats:sup>232<\/jats:sup>\n                    Th and its daughters, with a record\u2010breaking chemical yield of 88.2% and an estimated radionuclide purity of over 99.9%. Mechanism analysis suggests that Pb(II) and Bi(III) can form anionic complexes in the HBr medium, with [PbBr\n                    <jats:sup>3<\/jats:sup>\n                    ]\n                    <jats:sup>\u2212<\/jats:sup>\n                    and [BiBr\n                    <jats:sub>5<\/jats:sub>\n                    ]\n                    <jats:sup>2\u2212<\/jats:sup>\n                    being the main species captured; while Th(IV), Ac(III) and Ra(II) mainly exist as cationic forms and thus can't be fixed. To date, this represents the first report of successfully extracting\n                    <jats:sup>212<\/jats:sup>\n                    Pb\/\n                    <jats:sup>212<\/jats:sup>\n                    Bi from\n                    <jats:sup>232<\/jats:sup>\n                    Th and its daughters using anion exchanger in bromide medium, as well as the mechanism illustrations, which enables the supply of\n                    <jats:sup>212<\/jats:sup>\n                    Pb\/\n                    <jats:sup>212<\/jats:sup>\n                    Bi directly from the abundant natural thorium resource to be possible.\n                  <\/jats:p>","DOI":"10.1002\/advs.74721","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T15:01:44Z","timestamp":1773068504000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Highly Efficient Extraction of\n                    <sup>212<\/sup>\n                    \u00a0Pb\/\n                    <sup>212<\/sup>\n                    Bi from the Decay Chain of\n                    <sup>232<\/sup>\n                    Th\u2010Based on Anion Exchange in Bromide Medium"],"prefix":"10.1002","volume":"13","author":[{"given":"Lifeng","family":"Chen","sequence":"first","affiliation":[{"name":"School of Nuclear Science and Technology University of South China  Hengyang P. R. China"},{"name":"Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of Education  Hengyang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wannian","family":"Feng","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology University of South China  Hengyang P. R. China"},{"name":"Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of Education  Hengyang P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuezhou","family":"Wei","sequence":"additional","affiliation":[{"name":"School of Nuclear Science and Technology University of South China  Hengyang P. R. China"},{"name":"Key Laboratory of Advanced Nuclear Energy Design and Safety Ministry of Education  Hengyang P. R. China"},{"name":"Institute of Nuclear Fuel Cycle and Materials, School of Mechanical Engineering Shanghai Jiao Tong University  Shanghai P. R. 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