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These \u201curban mines\u201d contain valuable and critical metals that must be recovered. Therefore, developing more sustainable and energy\u2010efficient separation techniques is essential. Membrane technology has demonstrated this capability, particularly those based on 2D materials, due to their atomic thickness and the ability to precisely tune pore size. This report introduces a novel nanofiltration membrane fabricated from charged, fully exfoliated, nanoporous 2D nanosheets. Developed for ion separation, it exhibits exceptional selectivity for silver (Ag) over other metals typically found in WEEE leachates\u2014a feature highly relevant for solar panel recycling. Furthermore, its rare stability in acidic media makes such an approach advantageous for hydrometallurgical processes. Notably, we demonstrate that these charged 2D membranes exhibit two distinct ion transport mechanisms, intra\u2010 and inter\u2010 lamellar, to achieve remarkable and rapid separation within 2\u00a0min.<\/jats:p>","DOI":"10.1002\/smll.202512412","type":"journal-article","created":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T08:18:22Z","timestamp":1770279502000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Acid Resistant and Highly Silver Selective Membranes Based on Charged Nanoporous 2D\u2010Materials"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0636-9031","authenticated-orcid":false,"given":"Sarah M.","family":"Chevrier","sequence":"first","affiliation":[{"name":"CEA CNRS NIMBE LICSEN Universit\u00e9 Paris\u2010Saclay  Gif\u2010sur\u2010Yvette France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0005-8018-4114","authenticated-orcid":false,"given":"Thibault","family":"Rosier","sequence":"additional","affiliation":[{"name":"CEA CNRS NIMBE LICSEN Universit\u00e9 Paris\u2010Saclay  Gif\u2010sur\u2010Yvette France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7372-0821","authenticated-orcid":false,"given":"Bo","family":"Han","sequence":"additional","affiliation":[{"name":"SCARCE Laboratory Energy Research Institute @ NTU (ERI@N) Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0002-4895-1182","authenticated-orcid":false,"given":"Lina","family":"Cherni","sequence":"additional","affiliation":[{"name":"CEA CNRS NIMBE LICSEN Universit\u00e9 Paris\u2010Saclay  Gif\u2010sur\u2010Yvette France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fabien L.","family":"Olivier","sequence":"additional","affiliation":[{"name":"CEA CNRS NIMBE LICSEN Universit\u00e9 Paris\u2010Saclay  Gif\u2010sur\u2010Yvette France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5802-369X","authenticated-orcid":false,"given":"H\u00e9l\u00e8ne","family":"Isnard","sequence":"additional","affiliation":[{"name":"Service de Physico\u2010Chimie (SPC) CEA Universit\u00e9 Paris\u2010Saclay  Gif sur Yvette France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0194-683X","authenticated-orcid":false,"given":"Jean\u2010Christophe P.","family":"Gabriel","sequence":"additional","affiliation":[{"name":"CEA CNRS NIMBE LICSEN Universit\u00e9 Paris\u2010Saclay  Gif\u2010sur\u2010Yvette France"},{"name":"SCARCE Laboratory Energy Research Institute @ NTU (ERI@N) Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,2,5]]},"reference":[{"key":"e_1_2_9_2_1","article-title":"International Telecommunication Union (ITU) and United Nations Institute for Training and Research (UNITAR)","author":"Bald\u00e9 C. 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