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Biosorption of Precious Metals Present a

Adriana Jazmín Legorreta-Castañeda, Carlos Alexander Lucho-Constantino

2026enfungal granulesgoldsilverfilamentous fungikinetics

Abstract

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Biosorption on fungal pellets constitutes a promising way of removing precious metals, which are often present at dilute concentrations in wastewater. Herein, we studied the Ag and Au biosorption by Aspergillus tabacinus and Cladosporium cladosporioides pellets. For A. tabacinus pellets the optimum pH values for the biosorption of Ag and Au were 5 and 4, respectively, while for C. cladosporioides granules, the best-suited values were 3 and 4, respectively. Biosorption kinetics of both metals were also studied at low adsorbate concentrations (1 mg/L) and the pH values mentioned above, and the contact times that allow maximum recovery of the two metals were determined. At the pH values estimated as optimum, A. tabacinus pellets absorbed greater amounts of Ag than C. cladosporioides pellets, while for Au the opposite occurred. We found that the pseudo-second-order model adequately represents Ag and Au biosorption kinetics under the conditions tested. Due to the growing demand and limited availability of these metals, their recovery from aqueous residual solutions is economically attractive and desirable in the expanding circular economy scheme.

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Cite This Work

@article{9480b910-2c98-47e6-92dd-032cca913b1c,
  title={Biosorption of Precious Metals Present a},
  author={Adriana Jazmín Legorreta-Castañeda and Carlos Alexander Lucho-Constantino},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Biosorption of Precious Metals Present a
AU  - Adriana Jazmín Legorreta-Castañeda
AU  - Carlos Alexander Lucho-Constantino
PY  - 2026
LA  - en
ER  -

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