Critical Metal Adsorption by Biotic and Abiotic Hydrous Manganese Oxides: Implications for Acid Mine Drainage Resource Recovery.

ABSTRACT: Acid mine drainage (AMD) remediation facilities can produce treatment byproducts with near ore grade concentrations of rare-earth elements (REEs), cobalt, and manganese. High concentrations of these critical metals in treatment solids are often associated with hydrous manganese oxides (HMOs) through adsorption and/or coprecipitation. Chemical and microbial oxidation processes can influence HMO formation, mineralogy, and sorption efficiency. Here, we investigate the adsorption of rare-earth elements and yttrium (REY), cobalt, and nickel over 31 days by (1) abiotic HMO (δ-MnO₂ and c-disordered H+ birnessite) produced by chemical oxidation and (2) bitotic HMO produced by Mn-oxidizing fungi, Paraphaeosphaeria sporulosa and Stagonospora sp. After 31 days, ∼70% of REY wa

SUBMITTER: Boothe-Lordon TJ 

PROVIDER: S-EPMC12461413 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature