Solubilization of natural gypsum (CaSO4.2H2O) and the formation of calcium oxalate by Aspergillus niger and Serpula himantioides

Gharieb, Mohammed M.; Sayer, Jacqueline A.; Gadd, Geoffrey Michael

doi:10.1017/s0953756297005510

Cited by 97 publications

(67 citation statements)

References 27 publications

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“…Often times especially with organic acids, this is usually evident through crystal formation in the solubilized zones, underneath growing colonies and elsewhere in the agar. In contrast to previous studies in which such solubilization was demonstrated [18][19][20][21][22] , no visible solubilization of arsenopyrite by these fungi occurred throughout the duration of this study. Also, upon examination under a light microscope, no crystals (usually indicative of cation immobilization as oxalates) were observed underneath growing colonies of the fungi or elsewhere in the agar plates with all amounts of FeAsS.…”

Section: Discussioncontrasting

confidence: 99%

Bioaccumulation of Arsenic by Fungi

Adeyemi¹

2009

American J. of Environmental Sciences

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Problem statement: Arsenic is a known toxic element and its presence and toxicity in nature is a worldwide environmental problem. The use of microorganisms in bioremediation is a potential method to reduce as concentration in contaminated areas. Approach: In order to explore the possible bioremediation of this element, three filamentous fungi-Aspergillus niger, Serpula himantioides and Trametes versicolor were investigated for their potential abilities to accumulate (and possibly solubilize) arsenic from an agar environment consisting of non buffered mineral salts media amended with 0.2, 0.4, 0.6 and 0.8% (w/v) arsenopyrite (FeAsS). Growth rates, dry weights, arsenic accumulation and oxalate production by the fungi as well as the pH of the growth media were all assessed during this study. Results: There was no visible solubilization of FeAsS particles underneath any of the growing fungal colonies or elsewhere in the respective agar plates. No specific patterns of growth changes were observed from the growth ratios of the fungi on agar amended with different amounts of FeAsS although growth of all fungi was stimulated by the incorporation of varying amounts of FeAsS into the agar with the exception of A. niger on 0.4% (w/v) amended agar and T. versicolor on 0.8% (w/v) amended agar. The amounts of dry weights obtained for all three fungi also did not follow any specific patterns with different amounts of FeAsS and the quantities obtained were in the order A. niger > S. himantioides > T. versicolor. All fungi accumulated as in their biomasses with all amounts of FeAsS although to varying levels and T. versicolor was the most effective with all amounts of FeAsS while A. niger was the least effective. Conclusion: The accumulation of arsenic in the biomasses of the test fungi as shown in this study may suggested a role for fungi through their bioaccumulating capabilities as agents in the possible bioremediation of arsenic contaminated environments.

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Section: Discussioncontrasting

confidence: 99%

Bioaccumulation of Arsenic by Fungi

Adeyemi¹

2009

American J. of Environmental Sciences

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“…H + , organic acids and other metabolites. This can result in changes in the mineral microtopography through pitting and etching of surfaces to complete dissolution (Drever & Stillings, 1997;Ehrlich, 1998;Gharieb et al, 1998;Kumar & Kumar, 1999;Adamo & Violante, 2000;Adeyemi & Gadd, 2005;Edwards et al, 2005;Uroz et al, 2009). Mineral dissolution may result in release of toxic (Sayer et al, 1999) or essential metals like K (Lian et al, 2008a, b).…”

Section: Mineral Biodeteriorationmentioning

confidence: 99%

Metals, minerals and microbes: geomicrobiology and bioremediation

2010

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Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. All kinds of microbes, including prokaryotes and eukaryotes and their symbiotic associations with each other and 'higher organisms', can contribute actively to geological phenomena, and central to many such geomicrobial processes are transformations of metals and minerals. Microbes have a variety of properties that can effect changes in metal speciation, toxicity and mobility, as well as mineral formation or mineral dissolution or deterioration. Such mechanisms are important components of natural biogeochemical cycles for metals as well as associated elements in biomass, soil, rocks and minerals, e.g. sulfur and phosphorus, and metalloids, actinides and metal radionuclides. Apart from being important in natural biosphere processes, metal and mineral transformations can have beneficial or detrimental consequences in a human context. Bioremediation is the application of biological systems to the clean-up of organic and inorganic pollution, with bacteria and fungi being the most important organisms for reclamation, immobilization or detoxification of metallic and radionuclide pollutants. Some biominerals or metallic elements deposited by microbes have catalytic and other properties in nanoparticle, crystalline or colloidal forms, and these are relevant to the development of novel biomaterials for technological and antimicrobial purposes. On the negative side, metal and mineral transformations by microbes may result in spoilage and destruction of natural and synthetic materials, rock and mineral-based building materials (e.g. concrete), acid mine drainage and associated metal pollution, biocorrosion of metals, alloys and related substances, and adverse effects on radionuclide speciation, mobility and containment, all with immense social and economic consequences. The ubiquity and importance of microbes in biosphere processes make geomicrobiology one of the most important concepts within microbiology, and one requiring an interdisciplinary approach to define environmental and applied significance and underpin exploitation in biotechnology. Microbes as geoactive agentsMicrobes interact with metals and minerals in natural and synthetic environments, altering their physical and chemical state, with metals and minerals also able to affect microbial growth, activity and survival. In addition, many minerals are biogenic in origin, and the formation of such biominerals is of global geological and industrial significance, as well as providing important structural components for many organisms, including important microbial groups such as diatoms, foraminifera and radiolaria (Ehrlich, 1996;Gadd & Raven, 2010). Geomicrobiology can simply be defined as the roles of microbes in geological processes (Banfield & Nealson, 1997;Banfield et al., 2005; Konhauser, 2007;Ehrlich & Newman, 2009). Metalminera...

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“…Silverman and Munoz, 1970;Arnott, 1982Arnott, , 1995Verrecchia et al, 1993;Garieb et al, 1998;Sayer and Gadd, 1997;Gadd, 1999Gadd, , 2002Garvie et al, 2000;Verrecchia, 2000;Burford et al, 2002;Gadd et al, 2002;Kolo et al, 2002). This is not the case for glushinskite [MgC 2 O 4 ·2(H 2 O)], where its formation in nature and in vitro (this work) shows that a pre-existing Mgrich substrate is a prerequisite.…”

Section: Introductionmentioning

confidence: 99%

In vitro formation of Ca-oxalates and the mineral glushinskite by fungal interaction with carbonate substrates and seawater

Kolo

Claeys

2005

Biogeosciences

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Abstract. This study investigates the in vitro formation of Ca-oxalates and glushinskite through fungal interaction with carbonate substrates and seawater as a process of biologically induced metal recycling and neo-mineral formation. The study also emphasizes the role of the substrates as metal donors. In the first experiment, thin sections prepared from dolomitic rock samples of Terwagne Formation (Carboniferous, Viséan, northern France) served as substrates. The thin sections placed in Petri dishes were exposed to fungi grown from naturally existing airborne spores. In the second experiment, fungal growth and mineral formation was monitored using only standard seawater (SSW) as a substrate. Fungal growth media consisted of a high protein/carbohydrates and sugar diet with demineralized water for irrigation. Fungal growth process reached completion under uncontrolled laboratory conditions. The newly formed minerals and textural changes caused by fungal attack on the carbonate substrates were investigated using light and scanning electron microscopy (SEM-EDX), x-ray diffraction (XRD) and Raman spectroscopy. The fungal interaction and attack on the dolomitic and seawater substrates resulted in the formation of Ca-oxalates (weddellite CaC 2 O 4 ·2(H 2 O), whewellite (CaC 2 O 4 ·(H 2 O)) and glushinskite MgC 2 O 4 ·2(H 2 O) associated with the destruction of the original hard substrates and their replacement by the new minerals. Both of Ca and Mg were mobilized from the experimental substrates by fungi. This metal mobilization involved a recycling of substrate metals into newly formed minerals. The biochemical and diagenetic results of the interaction strongly marked the attacked substrates with a biological fingerprint. Such fingerprints are biomarkers of primitive life. The formation of glushinskite is of specific importance that is related, besides its importance as a biomineral bearing a recycled Mg, to the possibility of its transformation through diagenetic pathway Correspondence to: K. Kolo (kakolo@vub.ac.be) into an Mg carbonate. This work is the first report on the in vitro formation of the mineral glushinskite through fungal interaction with carbonate and seawater substrates. Besides recording the detailed Raman signature of various crystal habits of Mg-and Ca-oxalates, the Raman spectroscopy proved two new crystal habits for glushinskite. The results of this work document the role of microorganisms as metal recyclers in biomineralization, neo-mineral formation, sediment diagenesis, bioweathering and in the production of mineral and diagenetic biomarkers. They also reveal the capacity of living fungi to interact with liquid substrates and precipitate new minerals.

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Solubilization of natural gypsum (CaSO4.2H2O) and the formation of calcium oxalate by Aspergillus niger and Serpula himantioides

Cited by 97 publications

References 27 publications

Bioaccumulation of Arsenic by Fungi

Bioaccumulation of Arsenic by Fungi

Metals, minerals and microbes: geomicrobiology and bioremediation

In vitro formation of Ca-oxalates and the mineral glushinskite by fungal interaction with carbonate substrates and seawater

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