Keiko Sasaki, Kojo T. Konadu
Double refractory gold ore (DRGO) not only includes ppt levels of gold grains locked in sulfide minerals but also a problematic amount of carbonaceous matter. This combination results in significant recovery loss of gold during cyanidation due to the strong affinity of the Au(CN)₂⁻ with the carbonaceous matter. While combustion can reduce carbonaceous content, it also produces pollutant gases such as CO₂, SO₂, and As₂O₃. As a solution, environmentally-friendly biotechnological approaches have been explored. The chapter presents mineralogical and chemical alterations in solid residues resulting from a sequential biotreatment that effectively liberates gold from sulfides through iron-oxidizers, followed by the decomposition of carbonaceous matter using lignin-degrading enzymes secreted by white rot-fungi. This innovative process has demonstrated a significant improvement in gold recovery rates exceeding 90%. Additionally, the chapter discusses further advancements in biotechnology for enhancing gold recovery from DRGO, addressing both efficacy and environmental considerations.
@article{5faf67f1-c048-47c5-841f-194e4af8c3dc,
title={Biotechnological Approaches to Facilitat},
author={Keiko Sasaki and Kojo T. Konadu},
year={2026},
language={en}
}TY - JOUR TI - Biotechnological Approaches to Facilitat AU - Keiko Sasaki AU - Kojo T. Konadu PY - 2026 LA - en ER -
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