{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T01:03:22Z","timestamp":1790643802466,"version":"4.1.0"},"reference-count":31,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T00:00:00Z","timestamp":1788307200000},"content-version":"vor","delay-in-days":1,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:00:00Z","timestamp":1788220800000},"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":[[2026,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Fluoride contamination in drinking water poses a significant environmental and public health challenge, necessitating the development of sustainable and efficient remediation materials. In this study, calcium oxide (CaO) nanoparticles were synthesized using banana blossom calyx residue as a renewable biotemplate through a simple precipitation\u2013calcination approach. The porous biomass architecture facilitated calcium ion adsorption and the subsequent formation of nanostructured CaO. Characterization by XRD, TGA\/DTA, UV\u2013Vis spectroscopy, photoluminescence spectroscopy, FTIR, FESEM, and EDS confirmed the formation of crystalline CaO nanoparticles with an average crystallite size of 12\u2009nm. FESEM analysis revealed hierarchical surface morphology with well\u2010defined cubic and rhombohedral particle geometries ranging from 1.65 to 2.0\u2009\u03bcm, composed of aggregated nanocrystalline domains. The synthesized nanoparticles exhibited effective fluoride removal, achieving 100% removal at an initial fluoride concentration of 3.84\u2009mg\u2009L\n                    <jats:sup>\u22121<\/jats:sup>\n                    and a maximum adsorption capacity of 25.12\u2009mg\u2009g\n                    <jats:sup>\u22121<\/jats:sup>\n                    . Adsorption equilibrium followed the Langmuir isotherm model (\n                    <jats:italic>R<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.990), indicating predominant monolayer adsorption. The enhanced fluoride removal was attributed to the synergistic effects of surface adsorption and CaF\n                    <jats:sub>2<\/jats:sub>\n                    precipitation. These findings demonstrate a facile and environmentally sustainable strategy for converting agricultural waste into functional nanomaterials for water purification applications.\n                  <\/jats:p>","DOI":"10.1002\/wer.70544","type":"journal-article","created":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T07:03:21Z","timestamp":1788332601000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Biotemplate\u2010assisted synthesis of CaO nanoparticles from banana blossom calyx residue for efficient fluoride removal from water"],"prefix":"10.1002","volume":"98","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-0300-4725","authenticated-orcid":false,"given":"Singaraju","family":"Revathi","sequence":"first","affiliation":[{"name":"Centre for Interfaces and Nanomaterials, Department of Biotechnology, School of Bioengineering Vel Tech Rangarajan Dr. Sagunthala R&amp;D Institute of Science and Technology  Chennai India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9592-7655","authenticated-orcid":false,"given":"K. Jagajjanani","family":"Rao","sequence":"additional","affiliation":[{"name":"Centre for Interfaces and Nanomaterials, Department of Biotechnology, School of Bioengineering Vel Tech Rangarajan Dr. Sagunthala R&amp;D Institute of Science and Technology  Chennai India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tarangini","family":"Korumilli","sequence":"additional","affiliation":[{"name":"Centre for Biomaterials and Environmental Biotechnology, Department of Biotechnology, School of Bioengineering Vel Tech Rangarajan Dr. Sagunthala R&amp;D Institute of Science and Technology  Chennai 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