Synthesis of biogenic Mn oxide and its application as lithium ion sieve

Qian Qian Yu, Emiko Morioka, Tsuyoshi Hirajima, Keiko Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


Geomimetics, taking lessons from nature's biogenic mineralization mechanisms, can provide powerful tools for advancing biohydrometallurgical processing. Microbial transformations are largely responsible for the Mn oxides found in nature. In this research biogenic birnessite was produced by a manganese-oxidizing fungus, Paraconiothyrium sp. WL-2, at pH 6.5 under room temperature, and characterized by XRD and TG-DTA. Abiotic (chemically synthesized) acidic birnessite was also prepared hydrometallurgically and subjected to a similar battery of characterization techniques. Following thermal treatment the sorption characteristics of these two materials were compared. The biogenic precursor showed several advantages to produce more effective Li-ion sieve than the chemically synthesized precursor. First, a shorter calcination period was required to produce Li4Mn5O12 without other phases; second, a greater content and higher crystallinity of H4Mn5O12 were obtained from the biogenic precursor. These advantages might be caused by poorer crystallinity and around 20 wt% organic matter in biogenic birnessite. While sorption density of Li+ in mmol/g was basically dependent on contents of H4Mn5O12 phase, the unique morphologies and sorption density were maintained with biogenic precursor even after repetition of sorption/desorption of Li+.

Original languageEnglish
Title of host publicationIntegration of Scientific and Industrial Knowledge on Biohydrometallurgy
Number of pages4
Publication statusPublished - 2013
Event20th International Biohydrometallurgy Symposium, IBS 2013 - Antofagasta, Chile
Duration: Oct 8 2013Oct 11 2013

Publication series

NameAdvanced Materials Research
ISSN (Print)1022-6680


Other20th International Biohydrometallurgy Symposium, IBS 2013

All Science Journal Classification (ASJC) codes

  • General Engineering


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