{
  "abstract": "Wildfires are increasingly transforming the nanoscale geochemistry of terrestrial systems, yet the persistence and environmental pathways of fire-derived nanoparticles (NPs) remain largely unexplored. This study examines the production, composition, and post-fire mobility of metallic and multimetallic NPs generated by the 2023 megafires in the Biobío Region of south-central Chile. Field sampling of burned soils, vegetation, and surface waters, complemented by controlled combustion experiments, revealed abundant metal-bearing NPs in post-fire compartments, including complex particles such as Fe–Mn, Fe–Ti–Mn, and Ti–Zn. Intermediate fire temperatures produced the highest NP yields and compositional diversity, whereas the highest-temperature treatment favoured a lower-yield, Mn-selective ultrafine assemblage. Mn-bearing NPs emerged as a selective pyrogenic signal in burned vegetation and surface soils, while Fe–Ti-bearing particles formed a more recurrent, mass-dominant soil reservoir. Post-fire streams contained Fe-bearing colloids (108–109 NPs L−1), highlighting their occurrence in surface waters more than a year after the fire. Hydrochemical patterns further suggested a soluble post-fire component, with a positive relationship between Cl−/Na+ and S/Na+ consistent with an anion-rich salt-leaching fingerprint. Recurrent nanoparticle signatures—such as Fe–Ti–Mn, Ti–Zn, and Ce–La associations—emerged as potential indicators of combustion conditions and post-fire redistribution. These findings indicate that large fires can leave a post-fire nanogeochemical signature, highlighting nanoparticles as sensitive tracers of combustion processes and potential carriers of metals in fire-affected landscapes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "name": "Cristian Suárez-Oubiña"
    },
    {
      "name": "Sélène Calvel"
    },
    {
      "name": "Mickael Tharaud"
    },
    {
      "name": "Nirina Taraconat"
    },
    {
      "name": "Véronique Michot"
    },
    {
      "name": "Emma Andrieux"
    },
    {
      "name": "Marc Benedetti"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9cjj6detr79jy.bib",
  "cited_by": 0,
  "doi": "10.1039/d6en00462h",
  "fulltext_url": null,
  "id": "9cjj6detr79jy",
  "issns": [
    "2051-8153"
  ],
  "landing_url": "https://cnrs.hal.science/hal-05753298v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "0.sde"
    ],
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.chim.anal"
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      "hal",
      "1.sdu.stu"
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      "hal",
      "2.sdu.stu.gc"
    ],
    [
      "openalex",
      "2306|Fire effects on ecosystems"
    ]
  ],
  "openalex": "W7211945263",
  "pdf_url": "https://cnrs.hal.science/hal-05753298/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "Royal Society of Chemistry",
  "ris": "https://research.draconitic.com/paper/9cjj6detr79jy.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:35Z",
      "native_id": "hal-05753298",
      "source": "hal",
      "url": "https://cnrs.hal.science/hal-05753298v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.anal",
      "subfield": "analytical"
    },
    {
      "field": "earth",
      "origin": "hal:0.sde",
      "subfield": "environmental-science"
    },
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.gc",
      "subfield": "geology-geochemistry"
    }
  ],
  "title": "Wildfire legacy and nanoparticle occurrence across post-fire landscapes of south-central Chile",
  "title_text": "Wildfire legacy and nanoparticle occurrence across post-fire landscapes of south-central Chile",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:35Z",
  "url": "https://research.draconitic.com/paper/9cjj6detr79jy",
  "venue": "Environmental science‎.Nano",
  "versions": []
}