Keiko Sasaki, Takuya Kaseyama
Preferential sorption of Co2+ ions over Ni2+ ions was achieved using biogenic Mn oxides produced by the Mn-oxidizing fungus Paraconiothyrium sp. WL-2 strain, achieving a maximum selectivity coefficient (αco/ Ni) of 18. This study aimed to elucidate the selective sorption mechanisms by analyzing the differences in how Co2+ and Ni2+ ions interact with the unique properties of biogenic Mn oxides. The methodology involved detailed spectroscopic analysis, comparing the sorption behaviors and mechanisms of Co2+ and Ni2+ ions in biogenic versus synthetic Mn oxides. The results indicated that octahedral Co2+ ions occupy vacancies in the Mn oxide structures, leading to their immobilization through oxidation. In contrast, Ni2+ ions primarily adhere to layer edges without oxidation, highlighting the contrasting sorption pathways. Moreover, the biogenic Mn oxides demonstrated higher Mn(III) content and larger specific surface areas, which contribute to their greater selectivity for Co2+ over Ni2+. This research underscores the potential of utilizing biogenic materials for selective ion removal in various environmental and industrial applications.
@article{de4b1e0c-73d2-4e65-94fd-b63340fc26fc,
title={Selective Sorption of Co2 over Ni2 Using},
author={Keiko Sasaki and Takuya Kaseyama},
year={2026},
language={en}
}TY - JOUR TI - Selective Sorption of Co2 over Ni2 Using AU - Keiko Sasaki AU - Takuya Kaseyama PY - 2026 LA - en ER -
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