Reproducing Authigenic Carbonate Precipitation in the Hypersaline Lake Acıgöl (Turkey) with Microbial Cultures

Balcı, Nurgül; Menekse, Meryem; Karagüler, Nevin Gül; Sonmez, M. Seref; Meister, Patrick

doi:10.1080/01490451.2015.1099763

Cited by 19 publications

(21 citation statements)

References 55 publications

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“…The water level and depth of the lake changes seasonally, with maxima in March and minima in August. Changes in the lake's water level create dry muds and brine pools that often contain salt precipitation with a unique microbial community [9]. Lake Acıgöl brines are predominantly Na-Cl-SO 4 type with Mg +2 /Ca +2 ratios ranging from 5 to 9 depending on the season (Table 1).…”

Section: Site Descriptionmentioning

confidence: 99%

“…A diverse microbial consortium rather than a single microorganism is commonly involved in carbonate and phosphate precipitation in natural environments [5,9,25,26]. In this respect, saline lakes and their halophilic microorganisms give an opportunity to study effect of abiotic factors on bacterial nanoglobules formation and biomineralization processes under natural conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Much attention has been put on carbonate minerals considered as indicator of biosignatures for extraterrestrial life and of paleo environmental conditions in diverse environments [1][2][3][4][5][6][7]. By regulating C, N and P, microorganisms cause precipitating a wide range of minerals such as carbonates, oxides and phosphates [8][9][10]. It is now widely accepted that formation of carbonates in marine (e.g., foraminiferal calcite, and corals) and fresh water environments (e.g., surface fresh water deposits, and tufas) is influenced by microbial activity.…”

Section: Introductionmentioning

confidence: 99%

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Formation of Carbonate Nanoglobules by a Mixed Natural Culture under Hypersaline Conditions

Balcı

Demirel‐Floyd

2016

Minerals

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Abstract:The present study demonstrated formation of Ca and P rich nanoglobules by a mixed natural halophilic population enriched from hypersaline lake sediments in laboratory culture experiments. Nanoglobules consisting of complex mixture of Ca, P, O, and C with minor amount of Mg occurred in the external envelop of bacterial cell in the first week of incubation at various Mg +2 /Ca +2 ratios and salinity at 30 • C. Unlike the control experiments (e.g., non-viable cells and without cells), later aggregation and transformation of nanoglobules caused the precipitation of calcium and/or magnesium carbonates in variable amount depending on the Mg +2 /Ca +2 ratios of the medium after 37 days of incubation. By showing the nucleation of carbonates on bacterial nanoglobules closely associated with the cell surfaces of mixed natural population this study emphasis that formation of nanoglobules may not be specific to a microbial strain or to activity of a particular microbial group. Formation of carbonate nanoglobules under various conditions (e.g., Mg +2 /Ca +2 ratios, salinity) with the same halophilic culture suggest that the although metabolic activity of bacteria have an influence on formation of nanoglobules the mineralogy of nanoglobules may be controlled by the physicochemical conditions of the precipitation solution and the rate of mineral precipitation.

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Section: Site Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formation of Carbonate Nanoglobules by a Mixed Natural Culture under Hypersaline Conditions

Balcı

Demirel‐Floyd

2016

Minerals

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“…The sediment samples were obtained by Ekman bottom grab sampler and subsequently transported into sterile single-use 50-ml centrifuge tubes using a sterile spatula and stored at -20°C until further microbiological analysis. Microbiological analysis was performed according to the methods applied by Balci et al (2015). Shortly thereafter, genomic DNA from the sediment samples was extracted by using the MoBio UltraClean Microbial DNA Isolation Kit (Catalogue No.…”

Section: Microbiological Analysismentioning

confidence: 99%

“…Microbial diversity of the sediment samples was determined by the 16S rDNA UARR polymerase chain reaction (PCR) method (Li et al 1999;Menekse 2012;Balci et al 2015). A pair of universal primers namely, pA-F (5 0 -AGA GTTTGATCCTGGCTCAG-3 0 ) and pH-R (5 0 -AAGGAGG TGATCCAGCCGCA-3 0 ) were used for amplification (Li et al 1999).…”

Section: Microbiological Analysismentioning

confidence: 99%

Generation of Acid Mine Lakes Associated with Abandoned Coal Mines in Northwest Turkey

Yücel

Balcı

Baba

2016

Arch Environ Contam Toxicol

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A total of five acid mine lakes (AMLs) located in northwest Turkey were investigated using combined isotope, molecular, and geochemical techniques to identify geochemical processes controlling and promoting acid formation. All of the investigated lakes showed typical characteristics of an AML with low pH (2.59-3.79) and high electrical conductivity values (1040-6430 lS/cm), in addition to high sulfate (594-5370 mg/l) and metal (aluminum [Al], iron [Fe], manganese [Mn], nickel [Ni], and zinc [Zn]) concentrations. Geochemical and isotope results showed that the acid-generation mechanism and source of sulfate in the lakes can change and depends on the age of the lakes. In the relatively older lakes (AMLs 1 through 3), biogeochemical Fe cycles seem to be the dominant process controlling metal concentration and pH of the water unlike in the younger lakes (AMLs 4 and 5). Bacterial species determined in an older lake (AML 2) indicate that biological oxidation and reduction of Fe and S are the dominant processes in the lakes. Furthermore, O and S isotopes of sulfate indicate that sulfate in the older mine lakes may be a product of much more complex oxidation/dissolution reactions. However, the major source of sulfate in the younger mine lakes is in situ pyrite oxidation catalyzed by Fe(III) produced by way of oxidation of Fe(II). Consistent with this, insignificant fractionation between d 34 S SO 4 and d 34 S FeS 2 values indicated that the oxidation of pyrite, along with dissolution and precipitation reactions of Fe(III) minerals, is the main reason for acid formation in the region. Overall, the results showed that acid generation during early stage formation of an AML associated with pyrite-rich mine waste is primarily controlled by the oxidation of pyrite with Fe cycles becoming the dominant processes regulating pH and metal cycles in the later stages of mine lake development.Acidic and highly metal-loaded effluents (acid mine drainage [AMD]) resulting from the exposure of pyrite and other metal sulfide minerals to weathering conditions are the principal environmental problems faced by the mining industry today (Dold and Spangerberg 2005).The formation mechanisms of AMD (e.g., oxidation of pyrite and other sulfide minerals) has been extensively studied

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Recombinant production and characterization of a novel esterase from a hypersaline lake, Acıgöl, by metagenomic approach

et al. 2019

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Reproducing Authigenic Carbonate Precipitation in the Hypersaline Lake Acıgöl (Turkey) with Microbial Cultures

Cited by 19 publications

References 55 publications

Formation of Carbonate Nanoglobules by a Mixed Natural Culture under Hypersaline Conditions

Formation of Carbonate Nanoglobules by a Mixed Natural Culture under Hypersaline Conditions

Generation of Acid Mine Lakes Associated with Abandoned Coal Mines in Northwest Turkey

Recombinant production and characterization of a novel esterase from a hypersaline lake, Acıgöl, by metagenomic approach

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