{
  "abstract": "Colloid transport and retention in environmental granular porous media underlie groundwater resource protection from, and remediation using, biological and non-biological nano- and micro-particles (colloids). During transport, colloids periodically intercept grain surfaces and translate along them at separation distances across several tens of nm corresponding to the secondary minimum between the opposing forces of longer-range of van der Waals (VDW) attraction and shorter-range electric double layer (EDL) repulsion. Relatively weak diffusive translation of colloids supports their continued translation in secondary minimum association until they are expelled to bulk fluid at rear flow stagnation zones on grain leeward sides. We herein show that this dynamic focuses colloids into a network of fluid streamlines (incomplete mixing lamellae) that enhances their subsequent likelihood of interception with downgradient grains, i.e., increases the so-called collector efficiency (typically denoted by Greek letter eta). Interception focusing of colloids in granular porous media explains well-observed outcomes of colloid transport under environmental conditions, including nonmonotonic nonexponential profiles of retained colloids and the non-Markovian nature of extended tailing of low colloid concentrations following initial elution. Interception focusing is a fundamental process that distinguishes colloids from solutes and renders inapplicable to colloids the assumption that is often invoked for solutes of complete pore scale mixing in granular porous media.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.09947",
  "author_total": 5,
  "authors": [
    {
      "name": "William P. Johnson"
    },
    {
      "name": "Noah G. Willis"
    },
    {
      "name": "Luis A. Ullauri"
    },
    {
      "name": "Bashar M. Al-Zghoul"
    },
    {
      "name": "Diogo Bolster"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6wcds6s68gqjt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.09947",
  "fulltext_url": null,
  "id": "6wcds6s68gqjt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.09947",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ],
    [
      "arxiv",
      "physics.flu-dyn"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.09947",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6wcds6s68gqjt.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:23Z",
      "native_id": "2611.09947",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.09947"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.flu-dyn",
      "subfield": "fluid-dynamics"
    }
  ],
  "title": "Interception Focusing of Colloid Transport in Granular Porous Media",
  "title_text": "Interception Focusing of Colloid Transport in Granular Porous Media",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:23Z",
  "url": "https://research.draconitic.com/paper/6wcds6s68gqjt",
  "venue": "arXiv",
  "versions": []
}