{
  "abstract": "The sustainable green synthesis of MnO2 nanoparticles (NPs) was optimized using response surface methodology (RSM) based on a central composite design (CCD). The developed quadratic model was highly significant (F = 21.28, p < 0.0001) with strong predictability (R2 = 0.9551). The optimized synthesis conditions for the reproducible formation of MnO2 NPs were identified as 20 g precursor, 500 mL extract, 75 °C, and pH 6. The synthesized NPs displayed characteristic absorption maxima at 266 nm and were phase-pure α-MnO2 with a tetragonal structure, nanoscale size (7–8 nm), and defect-rich crystalline nature. Surface characterization proved good colloidal stability (− 28.8 mV) along with the presence of phytochemical-derived functional groups, indicating effective bio-reduction and capping. Under the optimized conditions, the synthesized MnO2 NPs displayed excellent efficiency for the removal of 4-Chlorophenol (98.47%) and Bisphenol A (97.61%). RSM analysis proved that the adsorbent dosage and contact time were the dominant factors for the removal of pollutants. Kinetic studies proved that the removal of pollutants followed a pseudo-second-order model and proved the involvement of chemisorption in the removal process. Isotherm and thermodynamic analyses revealed favorable, spontaneous, and endothermic adsorption, with a higher affinity toward 4CP. The high qmax values of 16.26 mg g-1 for 4CP and 11.93 mg g-1 for BPA indicate the superior adsorption capacity of MnO2 NPs. Mechanistic investigations using HPLC, LC–MS/MS, and FT-IR proved a synergistic adsorption–oxidation pathway with the involvement of reactive oxygen species (ROS), leads to progressive degradation into low-molecular-weight intermediates. The nanoparticles retain > 90% removal efficiency after five reuse cycles, indicates good stability and reusability. Overall, this study demonstrates a green and scalable synthesis approach for MnO₂ NPs with dual adsorption–catalytic functionality, offering an effective strategy for the removal of phenolic contaminants from aqueous systems.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry, FED, PVP Siddhartha Institute of Technology"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Pavani Peddi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fe0rr8thbg0t7.bib",
  "cited_by": 0,
  "doi": "10.1038/s41598-026-63791-7",
  "fulltext_url": "https://doi.org/10.1038/s41598-026-63791-7",
  "id": "fe0rr8thbg0t7",
  "issns": [
    "2045-2322"
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  "landing_url": "https://doi.org/10.1038/s41598-026-63791-7",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "Q"
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      "lcc",
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      "openalex",
      "2312|Adsorption and biosorption for pollutant removal"
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  "openalex": "W7170569521",
  "pdf_url": "https://www.nature.com/articles/s41598-026-63791-7_reference.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-01",
  "publisher": "Nature Portfolio",
  "ris": "https://research.draconitic.com/paper/fe0rr8thbg0t7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T13:45:52Z",
      "native_id": "25ff04f3bf4d45db86f9f5f97e790525",
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      "url": "https://doi.org/10.1038/s41598-026-63791-7"
    }
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  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:2312|Adsorption and biosorption for pollutant removal",
      "subfield": "hydrology-soils"
    }
  ],
  "title": "Integrated response surface methodology for the optimization of green-synthesized MnO2 nanoparticles and their application in phenolic pollutant removal",
  "title_text": "Integrated response surface methodology for the optimization of green-synthesized MnO2 nanoparticles and their application in phenolic pollutant removal",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:45:52Z",
  "url": "https://research.draconitic.com/paper/fe0rr8thbg0t7",
  "venue": "Scientific Reports",
  "versions": []
}