{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T17:03:21Z","timestamp":1790787801976,"version":"4.1.0"},"reference-count":42,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T00:00:00Z","timestamp":1790726400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>This study reports the synthesis, characterization, and wastewater treatment performance of a hybrid nanocomposite based on graphene oxide (GO) and \u03b3-alumina (\u03b3-Al2O3). Functionalization was carried out via silanization using GPTMS for GO and APTES for \u03b3-Al2O3, followed by covalent grafting through epoxy\u2013amine linkage. FTIR spectroscopy confirmed successful grafting, showing Si\u2013O\u2013Si stretching and reduced epoxy ring vibrations. BET analysis indicated that the GO\/\u03b3-Al2O3 hybrid (ALGO) preserved a high specific surface area (198.08 m2\/g), comparable to commercial \u03b3-Al2O3, demonstrating that GO did not hinder porosity. ALGO was incorporated into polyurethane foam at loadings of 1\u20135% (ALGO@PU foam) and applied in wastewater treatment. UV-Vis spectroscopy revealed strong affinity for silver ions, evidenced by a decrease in AgNO3 absorbance (~430\u2013600 nm) with increasing AlGO content. Treatment of real industrial wastewater showed significant reductions in chemical oxygen demand (COD), biological oxygen demand (BOD), and turbidity. At 5% loading, COD and BOD decreased from 1162 and 480 mg\/L to 64 and 11 mg\/L, respectively, while turbidity dropped from &gt;1100 NTU to 1.62 NTU. These results demonstrate that ALGO is a functional adsorbent capable of removing ion metals, and improving water clarity, highlighting its potential for industrial wastewater treatment applications.<\/jats:p>","DOI":"10.3390\/nano16191239","type":"journal-article","created":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T16:36:31Z","timestamp":1790786191000},"page":"1239","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Novel Graphene Oxide\/\u03b3-Alumina Hybrid Nano-Adsorbent Integrated into Polyurethane Foam for Adsorption of Industrial Pollutants from Wastewater"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-4950-2445","authenticated-orcid":false,"given":"Salar","family":"Sadri","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering, Shah.C, Islamic Azad University, Shahreza 8648146411, Iran"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"software","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"conceptualization","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-4442-7982","authenticated-orcid":false,"given":"Mohammad Hassan","family":"Vakili","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Shah.C, Islamic Azad University, Shahreza 8648146411, Iran"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"visualization","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"conceptualization","vocabulary":"credit"}]},{"given":"Nader","family":"Mokhtarian","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Shah.C, Islamic Azad University, Shahreza 8648146411, Iran"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"data-curation","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"36837","DOI":"10.1039\/D5RA04106F","article-title":"Heavy metal adsorption by graphene oxide modified with 5-amino-3(2-thienyl)pyrazole using central composite design\/response surface methodology (CCD\/RSM)","volume":"15","author":"Alimohammady","year":"2025","journal-title":"RSC Adv."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"5034","DOI":"10.1039\/C3TA14751G","article-title":"Bio-inspired surface-functionalization of graphene oxide for the adsorption of organic dyes and heavy metal ions with a superhigh capacity","volume":"2","author":"Dong","year":"2014","journal-title":"J. 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