{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T02:30:10Z","timestamp":1786329010459,"version":"build-2736575974"},"reference-count":52,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T00:00:00Z","timestamp":1776211200000},"content-version":"vor","delay-in-days":14,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T00:00:00Z","timestamp":1775001600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Water Environment Research"],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    In this study, porous iron oxide material (hereinafter referred to as p\u2010FexOy), synthesized on the hard template of Indion 220Na by ion exchange between the sodium and iron ions, was used as a new and potential material for total arsenic (As) removal in real groundwater samples. The physicochemical properties of the materials were determined by advanced methods such as Fourier transform infrared spectroscopy, X\u2010ray diffraction, scanning electron microscopy, energy\u2010dispersive X\u2010ray spectroscopy and mapping, transmission electron microscopy, and Brunauer\u2013Emmett\u2013Teller analyses. Although the study focuses on total As removal to align with the Vietnam National Technical Regulation on groundwater quality, the removal mechanism is discussed in relation to As speciation and surface charge. Selective As(V) removal occurs in acidic media, whereas both As(III) and As(V) are efficiently adsorbed near the point of zero charge (pH\n                    <jats:sub>pzc<\/jats:sub>\n                    \u2009=\u20097.15). The maximum adsorption capacity (Q\n                    <jats:sub>max<\/jats:sub>\n                    ) reached 0.228\u2009mg\/g at a suitable pH range of 7\u20139 and an adsorption equilibrium time of 60\u2009min. The equilibrium data were best described by the Langmuir isotherm model (\n                    <jats:italic>R<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.999), indicating monolayer adsorption on a homogeneous surface, while the adsorption kinetics followed the pseudo\u2010second\u2010order model (\n                    <jats:italic>R<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.9946). These findings suggest that p\u2010FexOy would have many potential applications in environmental remediation.\n                  <\/jats:p>","DOI":"10.1002\/wer.70379","type":"journal-article","created":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T03:05:18Z","timestamp":1776308718000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Efficient Arsenic Removal From Groundwater Using Porous Iron Oxide Material Prepared via Iron\u2010Embedded Cation Exchange Resin Beads"],"prefix":"10.1002","volume":"98","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7691-017X","authenticated-orcid":false,"given":"Trung\u00a0Thanh","family":"Nguyen","sequence":"first","affiliation":[{"name":"Nanomaterial Laboratory An Giang University  Long Xuyen An Giang Province Vietnam"},{"name":"Vietnam National University Ho Chi Minh City  Ho Chi Minh City Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cam\u00a0Tien","family":"Nguyen\u00a0Thi","sequence":"additional","affiliation":[{"name":"Center for Energy and Environmental Materials, Institute of Fundamental and Applied Sciences Duy Tan University  Ho Chi Minh City Vietnam"},{"name":"Faculty of Environmental and Chemical Engineering Duy Tan University  Da Nang City Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thuy\u00a0Duyen","family":"Tran\u00a0Thi","sequence":"additional","affiliation":[{"name":"Vietnam National University Ho Chi Minh City  Ho Chi Minh City Vietnam"},{"name":"Institute for Environment and Resources  Ho Chi Minh City Vietnam"},{"name":"An Giang Natural Resources and Environment Department  Long Xuyen An Giang Province 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