{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T17:59:37Z","timestamp":1784829577725,"version":"3.55.0"},"reference-count":45,"publisher":"Public Library of Science (PLoS)","issue":"5","license":[{"start":{"date-parts":[[2025,5,9]],"date-time":"2025-05-09T00:00:00Z","timestamp":1746748800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>Ni-Mn ferrites magnetic nanoparticles (MNPs) were successfully prepared through the ethanol solution combustion-calcination process, and characterized by SEM, TEM, XRD, VSM, BET, and FTIR techniques. For smaller particle size and suitable magnetic property, the optimum element ratio of the material was Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub>, and the optimal preparation conditions were appropriate ethanol dosage to attain Fe<jats:sup>3+<\/jats:sup> concentrations of approximately 0.85 M, calcination temperature of 400 \u00b0C, and calcination time of 2\u2009h, their specific surface area was 136.5 m<jats:sup>2<\/jats:sup>\/g, and their average particle size and saturation magnetization were 35\u2009nm and 21.66 emu\/g, respectively. The adsorption process of methyl blue (MB) onto Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> MNPs conformed to the pseudo-second-order adsorption kinetic model in the initial concentrations of 100\u2013250\u2009mg\/L. In comparison with Langmuir and Freundlich adsorption isotherm models, the Temkin model (R<jats:sup>2<\/jats:sup> = 0.9865) was observed to better demonstrate the state of MB onto Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> MNPs, revealing that the adsorption mechanism of MB onto Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> MNPs was the multi-molecular chemical process. The adsorption capacity of Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> MNPs for MB still maintained about 90% of the initial adsorbance after 6 times cyclic utilization of the nanoparticles by recalcination method, suggesting that Ni<jats:sub>0.9<\/jats:sub>Mn<jats:sub>0.1<\/jats:sub>Fe<jats:sub>2<\/jats:sub>O<jats:sub>4<\/jats:sub> MNPs had excellent regeneration performance. In general, these results coupled with its environmental friendliness attributed the potential candidates for effluent remediation.<\/jats:p>","DOI":"10.1371\/journal.pone.0321741","type":"journal-article","created":{"date-parts":[[2025,5,9]],"date-time":"2025-05-09T17:55:12Z","timestamp":1746813312000},"page":"e0321741","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Preparation of Ni-Mn ferrites magnetic nanoparticles through the ethanol solution combustion-calcination process for the adsorption of methyl 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