Carbonate Precipitation of Bacterial Strains Isolated from Sediments and Seawater: Formation Mechanisms

被引:30
作者
Andrea Silva-Castro, Gloria [1 ,4 ]
Uad, Imane [1 ]
Rivadeneyra, Almudena [2 ]
Ignacio Vilchez, Juan [1 ]
Martin-Ramos, Daniel [3 ]
Gonzalez-Lopez, Jesus [1 ,4 ]
Angustias Rivadeneyra, Maria [1 ,4 ]
机构
[1] Univ Granada, Inst Water Res, E-18071 Granada, Spain
[2] Univ Granada, Dept Elect, E-18071 Granada, Spain
[3] Univ Granada, Fac Sci, Dept Mineral, E-18071 Granada, Spain
[4] Univ Granada, Fac Pharm, Dept Microbiol, E-18071 Granada, Spain
关键词
Aragonite; Bacillus pumilus; Halomonas sp; Mg-calcite; Pseudomonas grimontii; Thalassospira sp; CALCIUM-CARBONATE; SALINE SOIL; ANHYDRASE; CO2; SEQUESTRATION; BIOMINERALIZATION; MINERALIZATION; OPPORTUNITIES; NUTRIENT; SYSTEM;
D O I
10.1080/01490451.2013.777492
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This article presents a research study on carbonate formation in solid and liquid media by Thalassospira sp., Halomonas sp., Bacillus pumilus, and Pseudomonas grimontii, four bacterial strains isolated from sediments and deep seawater. As part of this study, we analyzed carbonic anhydrase activity, pH, adsorption of calcium and magnesium ions, and total organic and inorganic carbon. The geochemical program PHREEQC was also used to calculate the mineral saturation indexes in all the cultures. The minerals formed were studied with X-ray diffraction, X-ray dispersive energy microanalysis, and scanning electron microscopy. In addition, all four bacterial strains were found to induce carbonate precipitation and to have carbonic anhydrase activity. Sterile control experiments did not precipitate carbonate. In solid M1 and B4 media, all of the strains precipitated magnesium calcite, whereas in the liquid media, they precipitated different percentages of magnesium calcite, aragonite, and monohydrocalcite. In both cases, small amounts of amorphous precipitates were also produced. This article discusses carbonate formation and the possible role played by metabolic activity, bacterial surfaces and carbonic anhydrase in this process. Finally, the results obtained lead to a hypothesis regarding the importance of carbonate precipitation for the survival of bacteria populations in certain habitats.
引用
收藏
页码:840 / 850
页数:11
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