{
  "abstract": "A sustainable adsorbent design strategy integrating circular economy and green chemistry principles was developed by using silica recovered from rice husk ash as a three-dimensional aerogel scaffold, followed by the incorporation of green-synthesized UiO-66-NH₂ and subsequent ethylenediaminetetraacetic acid (EDTA) functionalization. Rather than relying on commercially produced silica or solvent-intensive MOF fabrication, this approach simultaneously valorizes agricultural waste and constructs a hierarchical composite in which the mesoporous silica aerogel (SA), microporous UiO-66-NH₂, and EDTA coordination sites act cooperatively to maximize Pb²⁺ uptake. Structural characterization by XRD, FT-IR, SEM, TEM, and BET verified the successful integration of all components, revealing homogeneous dispersion of UiO-66-NH₂ throughout the aerogel framework together with an increased density of accessible adsorption sites. Under the optimized synthesis conditions, the composite achieved a Pb²⁺ uptake efficiency of 98.12% and a maximum Langmuir uptake ability of 383.33 mg g⁻¹, and reached uptake equilibrium within 15 min. Adsorption kinetics were well represented by the second-order model (R ² = 0.999), whereas the removal mechanism was dominated by coordination between Pb²⁺ and the -COO⁻, -NH₂, and Zr-O functional sites, assisted by electrostatic attraction. In addition, the adsorbent exhibited excellent selectivity toward Pb²⁺ in multi-ion solutions and maintained 82.27% removal efficiency after five adsorption-desorption cycles. These findings highlight the effectiveness of coupling biomass-derived silica with environmentally benign MOF synthesis to produce high-performance adsorbents, providing a viable platform for sustainable remediation of heavy-metal-contaminated wastewater.",
  "abstract_shown": true,
  "affiliations": [
    "Optical Materials Research Group, Science and Technology Advanced Institute, Van Lang University Ho Chi Minh City Vietnam.",
    "Faculty of Applied Technology, Van Lang School of Technology, Van Lang University Ho Chi Minh City Vietnam.",
    "Center for Environmental Intelligence, VinUniversity Hanoi Vietnam.",
    "School of Chemistry and Life Science, Hanoi University of Science and Technology Hanoi Vietnam tuan.vuanh@hust.edu.vn."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Van-Doan Nguyen",
      "orcid": "0009-0006-2678-0908"
    },
    {
      "affs": [
        2
      ],
      "name": "Danh Cuong Do"
    },
    {
      "affs": [
        3
      ],
      "name": "Anh Tuan Vu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9hegez9k14sdk.bib",
  "cited_by": 0,
  "doi": "10.1039/d6na00777e",
  "fulltext_url": "https://europepmc.org/articles/PMC13701112",
  "id": "9hegez9k14sdk",
  "issns": [
    "2516-0230"
  ],
  "landing_url": "https://europepmc.org/article/MED/42936221",
  "language": "eng",
  "licence": "CC-BY-NC",
  "licence_label": "CC BY-NC",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2312|Adsorption and biosorption for pollutant removal"
    ]
  ],
  "openalex": "W7223699382",
  "pdf_url": "https://europepmc.org/articles/PMC13701112?pdf=render",
  "pmcid": "PMC13701112",
  "pmid": "42936221",
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9hegez9k14sdk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:12Z",
      "native_id": "MED:42936221",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42936221"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:2312|Adsorption and biosorption for pollutant removal",
      "subfield": "hydrology-soils"
    }
  ],
  "title": "Rice husk ash-based silica aerogel/UiO-66-NH₂ hybrid for fast and highly selective Pb(ii) capture: a green route toward advanced water treatment.",
  "title_text": "Rice husk ash-based silica aerogel/UiO-66-NH₂ hybrid for fast and highly selective Pb(ii) capture: a green route toward advanced water treatment.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:22:12Z",
  "url": "https://research.draconitic.com/paper/9hegez9k14sdk",
  "venue": "Nanoscale advances",
  "versions": []
}