Cape Peninsula University of Technology
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Iron precipitation kinetics during microbial ferrous-ion oxidation

dataset
posted on 2025-03-18, 07:55 authored by Kevin SwamiKevin Swami

2022FEBEREC-STD-027


This study investigates the kinetics of ferric-ion precipitates, particularly potassium jarosite (K-jarosite), formed during microbial ferrous-ion oxidation in bioleaching. Experiments using a mesophilic bacterial culture at temperatures of 30, 35, and 40°C over 14 days revealed that ferric-ion precipitation began after 24 hours, with a maximum of 2.48 grams forming at 40°C. Characterization through XRD, SEM, FTIR, and TGA confirmed the presence and properties of K-jarosite. Kinetic analysis showed that precipitation follows first-order kinetics, with an activation energy of 117.2 kJ/mol, indicating an endothermic and non-spontaneous process. These findings offer insights into controlling jarosite accumulation to enhance bioleaching efficiency.

History

Is this dataset for graduation purposes?

  • Yes

Supervisor email address

OjumuT@cput.ac.za

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