{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T04:51:19Z","timestamp":1791867079126,"version":"4.3.4"},"reference-count":55,"publisher":"American Chemical Society (ACS)","issue":"3","license":[{"start":{"date-parts":[[2022,1,14]],"date-time":"2022-01-14T00:00:00Z","timestamp":1642118400000},"content-version":"vor","delay-in-days":365,"URL":"https:\/\/pubs.acs.org\/page\/policy\/authorchoice_ccbyncnd_termsofuse.html"}],"funder":[{"DOI":"10.13039\/501100001711","name":"Schweizerischer Nationalfonds zur F\u00f6rderung der Wissenschaftlichen Forschung","doi-asserted-by":"publisher","award":["200021_156392"],"award-info":[{"award-number":["200021_156392"]}],"id":[{"id":"10.13039\/501100001711","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,2,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Manganese is a redox-sensitive element in soils and sediments that plays an important role in the retention of trace elements. Under anoxic conditions, clay minerals were shown to increase Cd retention by favoring the precipitation of Mn(II) phases. In this study, we investigated the influence of aeration on anoxically formed Mn solid phases and its impact on Cd retention in the presence of two clay minerals with low Fe contents, a natural kaolinite (KGa-1b) and a synthetic montmorillonite (Syn-1). Ca-saturated KGa-1b and Syn-1 were pre-equilibrated with Mn2+ and Cd2+ under anoxic conditions for 1 or 30 days and subsequently exposed to air for 1 or 30 days. The analysis with synchrotron X-ray absorption spectroscopy (XAS) revealed that extended anoxic pre-equilibration (30 days) partially prevented the oxidation of sorbed Mn(II) (MnSiO3 and Mn(II)Al-LDH). Extended exposure to ambient air and short anoxic pre-equilibration favored the formation of feitknechtite (\u03b2-MnOOH) and birnessite (\u03b4-MnO2). Aeration resulted in a decrease of pH and a net release of Cd2+ into the solution, indicating that Cd re-sorption by Mn(III\/IV)-phases was insufficient to compensate for the release of Cd2+ due to dissolution of Mn(II)-containing phases and the decrease in pH. Our results demonstrate the significance of clay minerals in the (trans)formation of Mn-containing phases and their impact on trace metal retention in environments undergoing fluctuating redox conditions.<\/jats:p>","DOI":"10.1021\/acs.est.0c05875","type":"journal-article","created":{"date-parts":[[2021,1,15]],"date-time":"2021-01-15T00:01:06Z","timestamp":1610668866000},"page":"1650-1658","source":"Crossref","is-referenced-by-count":43,"title":["The\nEffect of Aeration on Mn(II) Sorbed to Clay Minerals\nand Its Impact on Cd Retention"],"prefix":"10.1021","volume":"55","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7837-3796","authenticated-orcid":true,"given":"Natacha","family":"Van Groeningen","sequence":"first","affiliation":[{"name":"CHN, ETH Zu\u0308rich , , ,","place":["Zu\u0308rich, Switzerland, 8092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0566-8635","authenticated-orcid":true,"given":"Iso","family":"Christl","sequence":"additional","affiliation":[{"name":"CHN, ETH Zu\u0308rich , , ,","place":["Zu\u0308rich, Switzerland, 8092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2587-2430","authenticated-orcid":true,"given":"Ruben","family":"Kretzschmar","sequence":"additional","affiliation":[{"name":"CHN, ETH Zu\u0308rich , , ,","place":["Zu\u0308rich, Switzerland, 8092"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2021,1,14]]},"reference":[{"key":"2026090216070184600_cit1","doi-asserted-by":"publisher","first-page":"524","DOI":"10.1016\/j.chemgeo.2017.07.002","article-title":"Structural alteration\nof hexagonal birnessite by aqueous\nMn(II): Impacts on Ni(II) sorption","volume":"466","author":"Lefkowitz","year":"2017","journal-title":"Chem. Geol."},{"key":"2026090216070184600_cit2","doi-asserted-by":"publisher","first-page":"4886","DOI":"10.1021\/es506019j","article-title":"Impacts of aqueous\nMn(II) on the sorption of Zn(II)\nby hexagonal Birnessite","volume":"49","author":"Lefkowitz","year":"2015","journal-title":"Environ. Sci. Technol."},{"key":"2026090216070184600_cit3","doi-asserted-by":"publisher","first-page":"61","DOI":"10.1071\/SR9800061","article-title":"Adsorption\nof lead and other heavy-metals on oxides of manganese and iron","volume":"18","author":"McKenzie","year":"1980","journal-title":"Aust. J. Soil Res."},{"key":"2026090216070184600_cit4","doi-asserted-by":"publisher","first-page":"3367","DOI":"10.1021\/es025989z","article-title":"Molecular\ninterfacial reactions between Pu(VI) and manganese oxide minerals\nmanganite and hausmannite","volume":"37","author":"Shaughnessy","year":"2003","journal-title":"Environ. Sci. 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Agron."},{"key":"2026090216070184600_cit32","doi-asserted-by":"publisher","first-page":"20","DOI":"10.3390\/soilsystems2020020","article-title":"A comparison of the solubility products\nof layered\nMe(II)-Al(III) hydroxides based on sorption studies with Ni(II), Zn(II),\nCo(II), Fe(II), and Mn(II)","volume":"2","author":"Bhattacharya","year":"2018","journal-title":"Soil Syst."},{"key":"2026090216070184600_cit33","doi-asserted-by":"publisher","first-page":"1355","DOI":"10.1039\/D0EM00063A","article-title":"Interactions of ferrous iron with\nclay mineral surfaces during sorption and subsequent oxidation","volume":"22","author":"Van Groeningen","year":"2020","journal-title":"Environ. Sci.: Process. 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Int."},{"key":"2026090216070184600_cit44","doi-asserted-by":"crossref","unstructured":"Kelly, S. D.; Hesterberg, D.; Ravel, B., Analysis of Soils and Minerals\nUsing X-ray Absorption Spectroscopy., in  Methods of Soil Analysis Part 5\u2500Mineralogical\nMethods, SSSA Book Ser. 5.5. SSSA, L.R.D. A. L., ULERY, Editor. 2008: Madison, WI. p. 387\u2013463.","DOI":"10.2136\/sssabookser5.5.c14"},{"key":"2026090216070184600_cit45","doi-asserted-by":"publisher","first-page":"130","DOI":"10.1007\/s002690050095","article-title":"Pressure dependence of hydrogen bonding\nin metal deuteroxides: a\nneutron powder diffraction study of Mn(OD)2 and beta-Co(OD)2","volume":"25","author":"Parise","year":"1998","journal-title":"Phys. Chem. Miner."},{"key":"2026090216070184600_cit46","doi-asserted-by":"publisher","first-page":"573","DOI":"10.1038\/s41467-019-08494-6","article-title":"Non-equilibrium crystallization\npathways of manganese oxides in aqueous solution","volume":"10","author":"Sun","year":"2019","journal-title":"Nat. Commun."},{"key":"2026090216070184600_cit47","doi-asserted-by":"publisher","first-page":"240","DOI":"10.1346\/CCMN.2004.0520210","article-title":"Synthesis of birnessite from the\noxidation of Mn2+ by O2 in alkali medium: Effects\nof synthesis conditions","volume":"52","author":"Feng","year":"2004","journal-title":"Clays Clay Miner."},{"key":"2026090216070184600_cit48","doi-asserted-by":"publisher","first-page":"10364","DOI":"10.1021\/es402108d","article-title":"Influence\nof pH on the reductive\ntransformation of birnessite by aqueous Mn(II)","volume":"47","author":"Lefkowitz","year":"2013","journal-title":"Environ. Sci. Technol."},{"key":"2026090216070184600_cit49","doi-asserted-by":"publisher","first-page":"821","DOI":"10.1107\/S0567740871002966","article-title":"Structures\nof alpha-Mn2O3,(Mn0.983Fe0.017)2O3 and (Mn0.37Fe0.63)2O3 and relation to magnetic ordering","volume":"27","author":"Geller","year":"1971","journal-title":"Acta Crystallogr. B"},{"key":"2026090216070184600_cit50","doi-asserted-by":"publisher","first-page":"939","DOI":"10.1071\/CH9930939","article-title":"Powder neutron-diffraction\nstudy of pyrolusite, \u03b2-MnO2","volume":"46","author":"Bolzan","year":"1993","journal-title":"Aust. J. Chem."},{"key":"2026090216070184600_cit51","doi-asserted-by":"publisher","first-page":"486","DOI":"10.1006\/jssc.1997.7516","article-title":"Hydrogen bonding and Jahn-Teller\ndistortion in groutite, \u03b1-MnOOH, and manganite, \u03b3-MnOOH,\nand their relations to the manganese dioxides ramsdellite and pyrolusite","volume":"133","author":"Kohler","year":"1997","journal-title":"J. Solid State Chem."},{"key":"2026090216070184600_cit52","doi-asserted-by":"publisher","first-page":"962","DOI":"10.2138\/am-1997-9-1013","article-title":"Structure\nof synthetic monoclinic\nNa-rich birnessite and hexagonal birnessite: II. Results from chemical\nstudies and EXAFS spectroscopy","volume":"82","author":"Silvester","year":"1997","journal-title":"Am. Mineral."},{"key":"2026090216070184600_cit53","doi-asserted-by":"publisher","first-page":"218","DOI":"10.1154\/1.1498279","article-title":"Rietveld refinement\nof a triclinic\nstructure for synthetic Na-birnessite using synchrotron powder diffraction\ndata","volume":"17","author":"Post","year":"2002","journal-title":"Powder Diffr."},{"key":"2026090216070184600_cit54","first-page":"1249","article-title":"Rietveld refinement of the high-pressure\npolymorph of Mn3O4","volume":"75","author":"Ross","year":"1990","journal-title":"Am.\nMineral."},{"key":"2026090216070184600_cit55","doi-asserted-by":"publisher","first-page":"125","DOI":"10.1007\/s10934-010-9430-0","article-title":"Uptake of cadmium, copper, and lead\nby microporous synthetic Na-birnessite","volume":"18","author":"Cho","year":"2011","journal-title":"J. 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