Special Issue "Interactions between Microbes and Minerals"
A special issue of Minerals (ISSN 2075-163X).
Deadline for manuscript submissions: closed (10 October 2013)
Prof. Dr. Danielle Fortin
Department Earth Sciences, University of Ottawa, Ottawa, ON, K1N 6N5, Canada
Interests: iron cycling; biogenic minerals; iron bacteria; sulfur bacteria; mine tailings; exobiology
Dr. Caroline Peacock
School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
Interests: biogeochemistry; metal-mineral-microbe interactions; mineral-water interfaces; trace-elements; palaeoenvironments; synchrotron spectroscopy
Interactions between microbes and minerals have been shown to occur in a vast array of natural pristine and contaminated environments. Earlier studies have for instance revealed that bacteria are efficient sorbents due to the various binding sites on their cell wall. In a wide array of environments these bacteria are found spatially associated with minerals, including oxides, carbonates, silicates, etc., through mineral nucleation reactions that occur on cell walls under saturation conditions, and mineral precipitation reactions in the presence of both non-Fe and Fe metabolising bacteria. Despite the large body of literature on the topic, there is still a need to further investigate microbe-mineral interactions, especially in the context of mining and mineral processing where microbes can play an important role in metal and metalloid immobilization or remobilization. The goal of this special issue is to gather recent advances in the field of microbe-mineral interactions, with a focus on bacteria, viruses and fungi. We also welcome studies on the discovery of new strains and metabolic pathways which can have implications for metal recovery in the mining sector.
Prof. Dr. Danielle Fortin
Dr. Caroline Peacock
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. Papers will be published continuously (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are refereed through a peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed Open Access quarterly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. For this special issue, the Article Processing Charge (APC) will be waived. English correction and/or formatting fees of 250 CHF (Swiss Francs) will be charged in certain cases for those articles accepted for publication that require extensive additional formatting and/or English corrections.
Article: Potentiostatically Poised Electrodes Mimic Iron Oxide and Interact with Soil Microbial Communities to Alter the Biogeochemistry of Arctic Peat Soils
Minerals 2013, 3(3), 318-336; doi:10.3390/min3030318
Received: 16 August 2013; in revised form: 11 September 2013 / Accepted: 13 September 2013 / Published: 23 September 2013| Download PDF Full-text (1324 KB) | Download XML Full-text
Minerals 2013, 3(4), 337-351; doi:10.3390/min3040337
Received: 29 August 2013; in revised form: 20 September 2013 / Accepted: 23 September 2013 / Published: 9 October 2013| Download PDF Full-text (1077 KB) | Download XML Full-text
Article: Geobiological Cycling of Gold: From Fundamental Process Understanding to Exploration Solutions
Minerals 2013, 3(4), 367-394; doi:10.3390/min3040367
Received: 7 September 2013; in revised form: 16 October 2013 / Accepted: 21 October 2013 / Published: 4 November 2013| Download PDF Full-text (3295 KB) | Download XML Full-text
Article: Microbial Reducibility of Fe(III) Phases Associated with the Genesis of Iron Ore Caves in the Iron Quadrangle, Minas Gerais, Brazil
Minerals 2013, 3(4), 395-411; doi:10.3390/min3040395
Received: 6 September 2013; in revised form: 2 November 2013 / Accepted: 15 November 2013 / Published: 26 November 2013| Download PDF Full-text (1738 KB) | Download XML Full-text
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Type of Paper: Article
Title: Potentiostatically-Poised Electrodes Mimick Iron Oxides and Interact with Soil Microbial Communities to Alter the Biogeochemistry of Arctic Peat Soils
Authors: Elliot S. Friedman 1, Kimberly Miller 2, David A. Lipson 2 and Largus T. Angenent 1
Affiliations: 1 Department of Biological & Environmental Engineering, Cornell University, Ithaca, NY 14853, USA; E-Mails: firstname.lastname@example.org (E.S.F); email@example.com (L.T.A.)
2 Department of Biology, San Diego State University, San Diego, CA 92182, USA; E-Mails: firstname.lastname@example.org (K.M.); email@example.com (D.A.L.)
Abstract: Dissimilatory metal-reducing bacteria, which are ubiquitous in soils worldwide, possess the ability to transfer electrons outside of their cell membranes, and are capable of respiring with various metal oxides or soluble electron shuttles (i.e., riboflavins or phenazines). Reduction of iron oxides is one of the more energetically favorable forms of anaerobic respiration, with a higher energy yield than manganese reduction, sulfate reduction, and methanogenesis. As such, this process could have significant implications for soil carbon balances, especially in the saturated, carbon-rich soils of the northern latitudes. However, the dynamics of these specific microbial processes within the context of the greater soil microbial community remains largely unstudied. Previously we have demonstrated the capability of potentiostatically-poised electrodes to mimick iron(III)- and humic acid-compounds, interact with soil microbial communities, and quantify metal-reducing respiration; here, we extend this work by using poised electrodes to selectively enrich for iron- or humic acid-reducing microorganisms, and observing the effects on both microbial community structure and greenhouse gas emissions. The addition of both un-poised and poised graphite electrodes to soils stimulated methane emissions while enriching proteobacteria, verrucomicrobia, and bacteroidetes phylums. This work demonstrates a new technique for precisely altering redox conditions in-situ and connecting microbial community dynamics with larger ecosystem processes, and provides a foundation for further studies examining the role of dissimilatory metal-reducing bacteria in global biogeochemical cycles.
Keywords: anaerobic respiration; bioelectrochemical systems; microbial food web; Arctic peat soils; tundra biogeochemistry
Type of Paper: Article
Title: Experimental Observations on 3-D Fungal Colonization, Metalophagus Behavior, Tunneling, Bioleaching and Bio-Weathering of Mineral Substrates
Author: Kamal Kolo
Affiliation: Earth System Science, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium; E-Mail: firstname.lastname@example.org
Abstract: In this study are investigated fungi-mineral surface interactions. Substrates from biotite, muscovite, bauxite, chromite, galena, malachite, manganite, and plagioclase were exposed in vitro to free fungal growth under open conditions. The interaction produced strong biochemical and biomechanical alterations of the mineral substrates. We specifically report here on a 3-dimentional thigmotropic colonization pattern of the mineral surfaces associated with possible fungal metalophagus behaviour. Authigenic secondary mineral biomineralization occurred: Ca-oxalates: weddellite (CaC2O4.2H2O), whewellite (CaC2O4.H2O), and Mg-Oxalate: glushinskite (MgC2O4.2H2O); struvite ((NH4)MgPO4.6H2O), gibbsite (Al(OH)3), and gypsum (CaSO4.2H2O). Bioleached metals included: Fe, Pb, S, Cu, Al which formed single crystals or aggregates, amorphous layers, amorphous aggregates, and linear forms influenced by the fungal filaments. Fungi bioleached Fe and Al from bauxite and manganite and deposited the two as separate mineral species. Calcium and sulphur were extracted from the manganite substrate and deposited as gypsum. Other biochemical and biomechanical features such as tunneling, strong pitting, exfoliation, dissolution, perforations, and fragmentation of the mineral surfaces were also produced. The results of this study besides experimentally detailing the role of fungi in bioweathering and mineral alteration also show for the first time, that to produce these alterations, fungi employ guided thigmotropic 3-D colonization of the mineral surfaces that strongly suggests a metalophagus behaviour.
Keywords: biomineralization; bioweathering; 3-D colonization; fungi; metalophagus behavior
Last update: 9 August 2013