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Electrolytic manganese residue secondary resource

Process residue from electrolytic manganese production, including the manganese-electrolysed slag sampled from a disposal dam near Jishou, Hunan, in Cao et al. This heterogeneous secondary resource is distinct from manganese ore, elemental manganese, and manufactured electrolytic manganese metal or dioxide. Its composition is sample dependent; no constituent-element criticality designation is inherited.

Microbial & Biochemical Mechanisms (1)

Fusarium culture-associated manganese mobilization from electrolytic residue

bioleaching Microbial

Associated Organisms: Fusarium (NCBITaxon:5506)

An indigenous isolate reported as Fusarium sp. increased solution-phase Mn relative to uninoculated cultures. Organic-acid action remains a hypothesis; this laboratory assay establishes neither an isolated manganese product nor industrial recovery.

Experimental Context & Analytical Limits:
Cao et al. sampled a slag dam 40 km south of Jishou and stored material at 4 degrees C for 24 h. Triplicate flask assays used 100 mL sterilized sucrose-containing Czapek medium, nominal 2% v/v inoculum, initial pH 4, 28 degrees C and 150 rpm, monitored through 144 h. Solid loading and feed pretreatment are insufficiently specified. Centrifuged supernatant was analyzed by AAS, which does not independently establish Mn oxidation state. Inoculum mass wording is ambiguous. The genus identifier preserves the source-level identification without resolving the strain.
Curated Evidence Points:
Sections 2.4 and 3.2 and Figures 2-4 report 71.6% at 72 h, calculated as medium Mn mass divided by initial slag Mn mass. Uninoculated release is nonzero and lower; later inoculated values decline. No precise control percentage is digitized.
Figures 2-5 show changing pH, without an abiotic comparator matched through that trajectory. Section 3.2.5 explicitly leaves organic acids unverified; operational BCR fractions in Figure 6 are not mineral identifications or full mass balance. Methods describe 26S/J62, while Section 3.1 says 16S. Figure 4 labels pH 4, 6, 7 and 8, conflicting with the prose upper bound 9.6.
The cited accession actually identifies CJB1 and partial 28S, not J62/26S. This supports Fusarium provenance but does not establish that J62 and CJB1 are the same isolate; no strain-level taxon is assigned.

Sources & References

  1. cao_2012: Cao, Li, Ouyang, Zheng, Wang, Shen, Yue and Yang (2012). Manganese-electrolysed slag treatment: bioleaching of manganese by Fusarium sp. Environmental Technology 33(11):1307-1312. DOI 10.1080/09593330.2011.624125; Sections 2-3, Figures 1-6. Full publisher PDF inspected from the Hunan University author site.
    https://doi.org/10.1080/09593330.2011.624125 (accessed 2026-10-11)
  2. ncbi_fusarium: NCBI Taxonomy 5506: Fusarium, genus; identifies neither an experimental strain nor a resolved species.
    https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=5506&mode=Info (accessed 2026-10-11)
  3. genbank_fj532369: GenBank FJ532369.1, Fusarium sp. CJB1 partial 28S ribosomal RNA gene, 538 bp; record dated 17 January 2009. Conflicts with the paper's J62 designation and ribosomal-marker wording.
    https://www.ncbi.nlm.nih.gov/sviewer/viewer.fcgi?id=FJ532369.1&db=nuccore&report=genbank&retmode=text (accessed 2026-10-11)

Curation History

Timestamp Curator Action Summary
2026-10-11T11:41:43.881318+00:00 Codex (GPT-6; Codex) CREATE Created the process-defined residue record from a complete primary fungal assay, preserving source taxonomy contradictions, missing loading, abiotic-control limits and laboratory scope.

Record source: data/records/electrolytic-manganese-residue.yaml