A Study in Blue: Secondary Copper‐Rich Minerals and Their Associated Bacterial Diversity in Icelandic Lava Tubes

Kopacz, Nina; Csuka, J.; Baqué, Mickaël; Iakubivskyi, Iaroslav; Guðlaugardóttir, Hrefna; Klarenberg, Ingeborg J.; Ahmed, Mahid; Zetterlind, Alexandra; Singh, Abhijeet; Kate, I. L. ten; Hellebrand, E.; Stockwell, Brent R.; Stefánsson, Árni B.; Vilhelmsson, Oddur; Neubeck, Anna; Schnürer, Anna; Geppert, Wolf D.

doi:10.1029/2022ea002234

Cited by 5 publications

(6 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observation of chrysocolla amorphous phases was supported by the SEM–EDX image data (Figure B), wherein several copper-rich particles, copper, silicon, and aluminum, as the main elements of chrysocolla, could be found together (i.e., particles with light blue color in Figure B). The EDX spot mode was used to acquire semiquantitative elemental composition from those copper-rich particles, and the average copper:silicon:aluminum mole ratio was calculated to be 1.7:1.5:0.12, which are similar to typical chrysocolla values reported in previous studies. − Aside from chrysocolla, copper was also present in the form of malachite (21 wt %), a secondary carbonate copper ore, that was identified together with talc (5 wt %) and muscovite (4 wt %) as the other dominant minerals. Chemical analysis by ICP-OES showed that copper was the main element in the material, corresponding to almost 38 wt %, followed by silicon (12 wt %), while magnesium, iron, and aluminum were present in lower concentrations (Table ).…”

Section: Resultssupporting

confidence: 64%

Solvometallurgical Process for the Recovery of Copper from Chrysocolla in Monoethanolamine

Kamariah

Xanthopoulos

Binnemans

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Difficulties in beneficiation and hydrometallurgical processing limit the potential of chrysocolla as a copper ore mineral. Solvoleaching in a solution of 3 M NH 4 Cl in monoethanolamine (MEA) enabled efficient and selective copper extraction from highgrade chrysocolla ore. The leaching temperature was a decisive parameter; leaching at elevated temperatures progressively improved copper extraction yields, with the highest yield of 88% obtained by leaching at 100 °C for 4 h. SEM−EDX analysis indicated the presence of copper-depleted silica surface layers in residual copper-containing chunks that eventually hinder complete copper extraction. However, it was demonstrated that either milling the leach residue to create fresh accessible surfaces or milling the starting material into finer particle size could improve copper extraction yields. FTIR analysis suggests that the leaching mechanism occurs via coordination of the amine functional group of MEA to copper(II) ions. The ammonium chloride salt in the lixiviant is expected to have provided chloride counteranions that kept the formed copper−ammine complex in solution. Copper was recovered from the pregnant leach solution by sulfide precipitation with an aqueous (NH 4 ) 2 S solution. Copper was precipitated as a covellite phase, with more than 98% recovery yield. Furthermore, reusability of the lixiviant was demonstrated by four leaching−precipitation cycles.

show abstract

Section: Resultssupporting

confidence: 64%

Solvometallurgical Process for the Recovery of Copper from Chrysocolla in Monoethanolamine

Kamariah

Xanthopoulos

Binnemans

et al. 2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…They are widespread in some extreme environments on Earth, such as deep-sea hot springs, volcanic craters and geothermally active areas. 117 While the study of hyperthermophilic bacteria began in the late 1960s and early 1970s, the 1980s was an important period of research, 118 in which in-depth studies of activity mechanisms revealed how these microorganisms survive and proliferate in high-temperature environments. With the development of molecular biology and genomics in the 1990s, scientists began to utilize molecular techniques to study in depth the genome of hyperthermophiles and their mechanisms of gene expression regulation.…”

Section: Application Of Microbial Agents In Compostingmentioning

confidence: 99%

Application of microbial agents in organic solid waste composting: a review

Duan,

Wang,

Wang

et al. 2024

J Sci Food Agric

View full text Add to dashboard Cite

The rapid growth of organic solid waste has recently exacerbated environmental pollution problems, and its improper treatment has led to the loss of a large number of biomass resources. Here, we expound the advantages of microbial agents composting compared with conventional organic solid waste treatment technology, and review the important role of microbial agents composting in organic solid waste composting from the aspects of screening and identification, optimization of conditions, mechanism of action, combination with other technologies and ultra‐high‐temperature and ultra‐low‐temperature microbial composting. We discuss the value of microorganisms with different growth conditions in organic solid waste composting, and put forward a seasonal multi‐temperature composite microbial composting technology. Provide new ideas for the all‐round treatment of microbial agents in organic solid waste in the future. © 2024 Society of Chemical Industry.

show abstract

“…The data supplement to this work is accessible at https://public.yoda.uu.nl/geo/UU01/I32Z95.html, https://doi. org/10.24416/UU01-I32Z95 (Kopacz, 2022). In addition, the raw genetic sequences for this study have been deposited in the European Nucleotide Archive (ENA) at the European Molecular Biology Laboratory-European Bioinformatics Institute (EMBL-EBI) under accession number PRJEB51902 (www.ebi.ac.uk/ena/browser/ view/PRJEB51902) (Klarenberg, 2022).…”

Section: Data Availability Statementmentioning

confidence: 99%