{
  "abstract": "Conventional hydrometallurgical processes for recycling waste SmCo magnets often require substantial reagent consumption and remain cost-intensive, particularly when solvent extraction is employed as a downstream separation step. In the present study, an integrated hydrometallurgical route was developed for the recovery of samarium, cobalt, and copper from SmCo magnet production scrap. More than 99% of samarium, cobalt and iron from the SmCo magnet scrap were leached with sulfuric acid, whereas copper remained in the leaching residue. Samarium was subsequently recovered selectively from the leachate as a high-purity sodium-samarium double sulfate using sodium sulfate as the precipitating agent. Importantly, we developed a selective iron removal step as an integral part of the flowsheet wherein the Fe(ii) present in the solution was oxidized to Fe(iii) using MnO₂, followed by selective precipitation of Fe(iii), aided by MnO. The resulting purified solution, enriched in cobalt and manganese, is suitable for electrowinning wherein cathodic cobalt formation can be simultaneously accompanied with anodic MnO₂ deposition. Overall, the integrated hydrometallurgical process developed in this study is facile, scalable and suitable for recycling complex SmCo magnet production scrap with high iron impurity.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Materials Engineering, Synthesis and Recycling (4MAT), Université Libre de Bruxelles Avenue FD Roosevelt 50, CP165/63 1050 Brussels Belgium prakash.venkatesan@ulb.be.",
    "Department of Metallurgy, Faculté Polytechnique, Université de Lubumbashi Democratic Republic of Congo.",
    "Department of Metallurgical and Materials Engg., IIT Kharagpur Kharagpur WB 721302 India."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Tshipeshi Makina Héritier",
      "orcid": "0009-0001-1215-3798"
    },
    {
      "affs": [
        0
      ],
      "name": "Muthukumar Volga"
    },
    {
      "affs": [
        2
      ],
      "name": "Arundhati Jena"
    },
    {
      "affs": [
        2
      ],
      "name": "Chenna Rao Borra"
    },
    {
      "affs": [
        1
      ],
      "name": "Mwema Mutamba Edouard"
    },
    {
      "affs": [
        0
      ],
      "name": "Prakash Venkatesan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9ca4brc9xqa9y.bib",
  "cited_by": 0,
  "doi": "10.1039/d6ra08919d",
  "fulltext_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13725791/?tool=EBI",
  "id": "9ca4brc9xqa9y",
  "issns": [
    "2046-2069"
  ],
  "landing_url": "https://europepmc.org/article/PMC/PMC13725791",
  "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": [
    [
      "heading",
      "Chemistry"
    ],
    [
      "openalex",
      "2210|Extraction and Separation Processes"
    ]
  ],
  "openalex": "W7225117292",
  "pdf_url": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13725791/pdf/?tool=EBI",
  "pmcid": "PMC13725791",
  "pmid": "42974340",
  "published": "2026-11-02",
  "publisher": "Royal Society of Chemistry",
  "ris": "https://research.draconitic.com/paper/9ca4brc9xqa9y.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T15:20:51Z",
      "native_id": "PMC:PMC13725791",
      "source": "europepmc",
      "url": "https://europepmc.org/article/PMC/PMC13725791"
    },
    {
      "first_seen": "2026-11-04T15:20:47Z",
      "native_id": "MED:42974340",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42974340"
    },
    {
      "first_seen": "2026-11-05T12:22:15Z",
      "native_id": "PMC13725791",
      "source": "pmc",
      "url": "https://doi.org/10.1039/d6ra08919d"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "heading:Chemistry",
      "subfield": "general"
    }
  ],
  "title": "An integrated hydrometallurgical route for recycling SmCo magnets from production waste",
  "title_text": "An integrated hydrometallurgical route for recycling SmCo magnets from production waste",
  "type": "peer-reviewed",
  "updated_at": "2026-11-05T12:22:15Z",
  "url": "https://research.draconitic.com/paper/9ca4brc9xqa9y",
  "venue": "RSC advances",
  "versions": []
}