{
  "abstract": "The typical organic dye rhodamine B (RhB), which poses a serious threat to freshwater safety, could be effectively eliminated via an advanced oxidation technology based on peroxymonosulfate (PMS). Developing efficient catalysts is the key to this process. Herein, CoFe₂O₄ (CFO) catalysts were synthesized via co-precipitation, hydrothermal, and sol-gel methods using an activated acid leaching/extracting/back-extracting process to recover iron from coal gangue as the Fe source and chemically pure cobalt chloride hexahydrate as the cobalt source. The prepared catalysts were applied as a high-efficiency activator of PMS for RhB degradation. As a result, the CFO catalyst prepared by the co-precipitation method could essentially achieve a degradation efficiency of 99.38% for RhB within 20 min; the optimal reaction parameters were a reaction temperature of 20 °C, catalyst concentration of 0.2 g L⁻¹, dye concentration of 30 mg L⁻¹, initial pH of 7, and PMS concentration of 0.7 g L⁻¹. A series of characterizations demonstrated that the catalyst had a large specific surface area, a rich pore structure, and excellent magnetic properties. Combined with radical quenching experiments, EPR and XPS, a possible PMS mechanism was proposed. ¹O₂ was the main active substance for the catalytic system, and SO₄ ⁻ and ˙OH were also produced during the PMS activation process. The work not only provides a valuable reference for the high-value utilization of high-iron coal gangue but also lays the foundation for the wet leaching of iron from coal gangue to prepare efficient PMS activators for treating organic dye wastewater.",
  "abstract_shown": true,
  "affiliations": [
    "School of Civil Engineering and Urban Planning, Liupanshui Normal University Liupanshui 553004 China.",
    "School of Chemistry and Materials Engineering, Liupanshui Normal University Liupanshui 553004 Guizhou China zhengxuemei@lpssy.edu.cn may_kmust11@163.com."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Mingxian Zhang"
    },
    {
      "affs": [
        1
      ],
      "name": "Ying He",
      "orcid": "0009-0001-1269-3102"
    },
    {
      "affs": [
        1
      ],
      "name": "Deshun Kong"
    },
    {
      "affs": [
        1
      ],
      "name": "Jinsong Du"
    },
    {
      "affs": [
        1
      ],
      "name": "Xuemei Zheng"
    },
    {
      "affs": [
        1
      ],
      "name": "Aiyuan Ma",
      "orcid": "0000-0003-4675-779X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5s7jweew688dv.bib",
  "cited_by": 0,
  "doi": "10.1039/d6ra07410c",
  "fulltext_url": "https://europepmc.org/articles/PMC13639864",
  "id": "5s7jweew688dv",
  "issns": [
    "2046-2069"
  ],
  "landing_url": "https://europepmc.org/article/MED/42840851",
  "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|Advanced oxidation water treatment"
    ]
  ],
  "openalex": "W7220735803",
  "pdf_url": "https://europepmc.org/articles/PMC13639864?pdf=render",
  "pmcid": "PMC13639864",
  "pmid": "42840851",
  "published": "2026-10-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5s7jweew688dv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:03Z",
      "native_id": "MED:42840851",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42840851"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:2312|Advanced oxidation water treatment",
      "subfield": "hydrology-soils"
    }
  ],
  "title": "CoFe₂O₄ prepared from cobalt-doped coal-gangue-leached iron as an effective peroxymonosulfate activator to degrade rhodamine B: preparation, application and degradation mechanism.",
  "title_text": "CoFe₂O₄ prepared from cobalt-doped coal-gangue-leached iron as an effective peroxymonosulfate activator to degrade rhodamine B: preparation, application and degradation mechanism.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:03Z",
  "url": "https://research.draconitic.com/paper/5s7jweew688dv",
  "venue": "RSC advances",
  "versions": []
}