scholarly journals Evaluation of coastal region microbial carbonate precipitation using urease produced microorganisms

2011 ◽  
Vol 6 (2) ◽  
pp. 305-315 ◽  
Author(s):  
Toshiro HATA ◽  
Nao TATENO ◽  
Hirofumi ABE
Keyword(s):  
Coastal Region ◽  
Carbonate Precipitation ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation

scholarly journals A centrifugal model test of microbial carbonate precipitation as liquefaction countermeasure

2011 ◽  
Vol 6 (2) ◽  
pp. 157-167 ◽  
Author(s):  
Yukiko INAGAKI ◽  
Masayoshi TSUKAMOTO ◽  
Hirotoshi MORI ◽  
Susumu NAKAJIMA ◽  
Tetsuya SASAKI ◽  
...  
Keyword(s):  
Model Test ◽  
Carbonate Precipitation ◽  
Centrifugal Model Test ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation ◽  
Centrifugal Model

Using microbial carbonate precipitation to improve the properties of recycled aggregate

2019 ◽  
Vol 228 ◽  
pp. 116743 ◽  
Author(s):  
Weilai Zeng ◽  
Yuxi Zhao ◽  
Chi Sun Poon ◽  
Zhangyao Feng ◽  
Zhenmei Lu ◽  
...  
Keyword(s):  
Recycled Aggregate ◽  
Carbonate Precipitation ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation

scholarly journals Sand Solidification through Microbially Induced Carbonate Precipitation for Erosion Control: Prospects in Bangladesh

2016 ◽  
Vol 9 (1) ◽  
pp. 59-61
Author(s):  
MNH Khan ◽  
S Kawasaki ◽  
MR Hassan
Keyword(s):  
Erosion Control ◽  
Precipitation Method ◽  
Carbonate Precipitation ◽  
Stiffness Properties ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation ◽  
Microbially Induced Carbonate Precipitation ◽  
Strength And Stiffness ◽  
Ureolytic Bacteria

Bio-cementation is a sand consolidation technology, in which ureolytic bacteria release carbonate from urea hydrolysis in the presence of an excess of calcium ions to form calcite (CaCO3) in-situ. Biocementation is to enhance the strength and stiffness properties of soil and rocks though microbial activity or products. This paper addressed the prospect of microbial carbonate precipitation for erosion control in Bangladesh. Bacterial CaCO3 precipitation under appropriate conditions is a general phenomenon where the ureolytic bacteria uses urea as an energy source and produces ammonia which increases the pH in the environment and generates carbonate, causing Ca2+ and CO32- to be precipitated as CaCO3. This CaCO3 join sand particles and forms rocklike materials that auto-repairs by means of sunlight, seawater, and bacteria as microbially induced carbonate precipitation method. These rock particles when produced artificially is called artificial rock and has the potentiality to protect coastlines from erosion.J. Environ. Sci. & Natural Resources, 9(1): 59-61 2016

Improvement of Concrete Materials by Bacterial-Mediated Precipitation

2011 ◽  
Vol 306-307 ◽  
pp. 455-458 ◽  
Author(s):  
Pei Hao Li ◽  
Wen Jun Qu
Keyword(s):  
Laboratory Experiments ◽  
Carbonate Precipitation ◽  
Accelerated Carbonation ◽  
X Ray Diffraction ◽  
Capillary Water ◽  
X Ray ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation ◽  
Concrete Materials ◽  
Capillary Water Uptake

Microbial carbonate precipitation had been proposed as alternative technique for improvement in concrete materials. Laboratory experiments were conducted by bacterially mediated carbonate deposition on the surface and subsurface of concrete specimens. The crystal phase, morphology and growth of the crystal deposited on specimens as well as the efficiency of bonding and protection were analyzed by means of X-ray diffraction (XRD), scanning electron microscope (SEM), and ultrasonic test. Water absorption and the resistance of carbonation of concrete were analyzed by water absorptivity test and concrete accelerated carbonation test, respectively. Results show that phases of crystal are calcite and vaterite. The crystals are deposited uniformly on the surface of specimens. Biodeposotion effectively reduces capillary water uptake and carbonation rate constant.

scholarly journals Carbonate precipitation by the thermophilic archaeon <i>Archaeoglobus fulgidus</i>: a model of carbon flow for an ancient microorganism

2008 ◽  
Vol 5 (4) ◽  
pp. 3409-3432
Author(s):  
L. L. Robbins ◽  
K. A. Van Cleave ◽  
P. Ostrom
Keyword(s):  
Organic Carbon ◽  
Inorganic Carbon ◽  
Isotopic Fractionation ◽  
Archaeoglobus Fulgidus ◽  
Precipitation Process ◽  
Carbonate Precipitation ◽  
Lactate Oxidation ◽  
Thermophilic Archaeon ◽  
Microbial Carbonate ◽  
Microbial Carbonate Precipitation

Abstract. Microbial carbonate precipitation experiments were conducted using the archaeon bacteria Archaeoglobus fulgidus to determine chemical and isotopic fractionation of organic and inorganic carbon into mineral phases. Carbonate precipitation was induced in two different experiments using A. fulgidus to determine the relative abundance of organically derived carbon incorporated into carbonate minerals as well as to define any distinct phases or patterns that could be attributed to the precipitation process. One experiment used a medium containing 13C-depleted organic carbon and 13C-enriched inorganic carbon, and the other used a 14C-labeled organic carbon source. Results indicated that 0.9–24.8% organic carbon was incorporated into carbonates precipitated by A. fulgidus and that this process was mediated primarily by pH and CO2 emission from cells. Data showed that the carbon in the CO2 produced from this microorganism is incorporated into carbonates and that the rate at which precipitation occurs and the dynamics of the carbonate precipitation process are strongly mediated by the specific steps involved in the biochemical process for lactate oxidation by A. fulgidus.

Sign in / Sign up

Export Citation Format

Share Document