Potential utilization of fungi in biomining as  biological engines for the alteration of sulfide and carbon matrices

Hein, Guillermo; Mahandra, Harshit; Ghahreman, Ahmad

doi:10.1007/s11157-023-09661-4

Cited by 3 publications

(4 citation statements)

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“…In the extractive industry, the development a symbiotic relationship between the mining process and the surrounding ecosystem is an essential step in addressing carbon and mineral lock-in. Based on bioprocesses, research into the use of fungi in mining processes could contribute to the emergence of a biomine, through niche innovation (Geels and Schot 2007;Hein et al 2023;Jones and Bismarck 2024). Thus, the development of such socio-technical systems leads to a symbiotic lock-in, resulting in a patterned interaction with the natural environment, which enters into a transitioning path.…”

Section: Governance Issuesmentioning

confidence: 99%

The quest for a sustainable industry: mining, path dependency and post-carbon regime in the European Arctic

Vidal

2024

Miner Econ

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The goal of the European Union’s Green Deal industrial plan is to achieve an ecological transition over the next three decades. This transition includes the electrification of energy and transport systems. Achieving such a transformation requires access to critical raw materials for the technologies that will enable the post-carbon transition of European societies. In this context, the European Arctic (also referred to as the Barents region) is seen as a key asset that can contribute to the EU’s green plan, in particular due to its high potential for mineral resources. Since the 19th century, Europe’s northernmost regions have developed a long tradition of mining activities (e.g., Swedish iron ore, which has been mined by LKAB). Fennoscandia’s mineral potential opens up new prospects for the industry. However, fundamental challenges lie ahead, such as the impact of climate change, pollution management, and social acceptability. Although the Nordic countries have based the economic development of their northern regions on sustainable principles, the concept of sustainable mining and its operational implementation have their shortcomings, such as sustained land use conflicts with the Sámi people. In addition, the possibility of missing some key governance linkages may lead to new path dependencies due to a lack of a systemic vision. Once these issues are addressed, the Nordic mining industry could spearhead this defining process for Europe’s ecological transition.

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Section: Governance Issuesmentioning

confidence: 99%

The quest for a sustainable industry: mining, path dependency and post-carbon regime in the European Arctic

Vidal

2024

Miner Econ

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“…The mechanism of the white-rot fungi to alter reduced sulfur species depends on the secretion of extracellular enzymes, including LiP and MnP. The catalytic cycle of oxidative enzymes has been explained in previous publications [4,6] and essentially consists of a chain of oxidation-reduction reactions favoring the oxidation of reduced sulfur species and the reduction of enzymatic compounds secreted by P. chrysosporium. However, the mechanism still needs further research to fully understand this type of system.…”

Section: Effect Of CM On Sulfide Bio-oxidationmentioning

confidence: 99%

“…The concentration of metabolites is a limitation that might also have restricted further oxidation. Therefore, more research should be done in that direction by considering bioengineered microorganisms that would improve the fungal activity under the studied experimental conditions [4].…”

Section: Implications and Limitationsmentioning

confidence: 99%

“…A bio-oxidation process avoiding extremely acidic pH requires microorganisms, e.g., fungi or bacteria, capable of growing at pH > 4.0. However, the use of these types of microorganisms to catalyze the oxidation of sulfidic ores in biomining has been barely investigated in comparison to acidophilic bacteria [2,4]. Recent investigations have shown a limited capacity of neutrophilic bacteria to oxidize solid matrices, while fungi have exhibited a more significant potential to assist the oxidation of sulfidic ores [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Modified Culture Conditions for Fungal Bio-Oxidation of Sulfidic Gold Ores Performed at Circumneutral pH

Hein,

Mahandra,

Ghahreman

2023

Sustainability

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The significant neutralization of waste streams required after the acidic bio-oxidation of sulfidic gold ores could be avoided by performing a novel treatment at circumneutral pH with an in situ neutralization. For the first time, the white-rot fungus Phanerochaete chrysosporium was incubated in a modified culture medium containing corn steep, an industrial waste product, to support microbial activity and, subsequently, the oxidation of a sulfidic ore at an initial circumneutral pH environment. In this investigation, the concentration of the native culture medium ingredients was first evaluated with response surface methodology to attain maximum sulfide oxidation. The statistical analysis proposed a modified culture medium composed of 12.86 g/L glucose, 2.20 g/L malt extract, 1.67 g/L yeast extract, and 0.49 g/L MgSO4·7H2O to reach a maximum of 28.7% sulfide oxidation after 14 d-bio-oxidation. pH-controlled batch cultures showed that an increase in initial pH in the range of 5.8 to 7.0 reduced the microbial activity, affecting sulfide oxidation. In addition, the modified culture medium at which yeast extract was substituted with 1.67 g/L corn steep produced comparable microbial activity and sulfide oxidation after 14 d, attaining 21.6% at 5% w/v with a maximum 39 U/L lignin peroxidase and 116 U/L manganese peroxidase. A 40.6% sulfide oxidation and 43.8% gold recovery were obtained after 42 d three-cycle replenishing bio-oxidation and 24 h cyanidation, respectively. Overall, corn steep waste showed the potential to substitute more expensive culture medium ingredients, supporting microbial activity and oxidation of sulfidic gold ores at an initial circumneutral pH and contributing to circularity of waste management.

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Application of Phanerochaete chrysosporium for enhancing gold recovery via bio-oxidation of refractory sulfidic ores in a circumneutral environment

Hein

Mahandra

Ghahreman

2023

Process Safety and Environmental Protection

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Potential utilization of fungi in biomining as biological engines for the alteration of sulfide and carbon matrices

Cited by 3 publications

References 123 publications

The quest for a sustainable industry: mining, path dependency and post-carbon regime in the European Arctic

The quest for a sustainable industry: mining, path dependency and post-carbon regime in the European Arctic

Assessment of Modified Culture Conditions for Fungal Bio-Oxidation of Sulfidic Gold Ores Performed at Circumneutral pH

Application of Phanerochaete chrysosporium for enhancing gold recovery via bio-oxidation of refractory sulfidic ores in a circumneutral environment

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