Comparison between Calcimetric and Titrimetric Methods for Calcium Carbonate Determination

Maulood, Pakhshan M.; Esmail, Akram Othman; Dohuki, Mohammed S.S.; Darwesh, Dalshad Azeez

doi:10.4236/ojss.2012.23031

Cited by 9 publications

(3 citation statements)

References 6 publications

(4 reference statements)

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“…Sample number % CaCO [18] Maulood et al, (2012) studied the comparison between the titrimetric and calcimetric for CaCO 3 determination in 84 different locations of soils from Iraq. They obtained no significant differences between the two methods and the two method were highly correlated (r = 0.993 to 0.998).…”

Section: Calcimeter Methodsmentioning

confidence: 99%

Assessment of Calcimetric and Titrimetric Methods for Calcium Carbonate Estimation of Five Soil Types in Central Sudan

Elfaki¹,

Gafei²,

Sulieman³

et al. 2016

GEP

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Despite the CaCO 3 estimation using titration method was not reliable, but up to the present time, some soil laboratories in Sudan still used this method. The objective of this study was to compare and assess the results of calcimetric and titrimetric methods of quantitative estimation for soil calcium carbonate of different soils in Sudan. 26 soil samples from five soil profiles were collected from different climatological and ecological regions in central Sudan. CaCO 3 equivalent was estimated using calcimeter and titration methods in order to find accurate, rapid and suitable method for soils of Sudan. The results revealed that there are no significant differences between calcimeter and titration methods for calcium carbonate estimation in all studied samples except in samples from Gedaref area. We concluded that when the Calcimeter method used for CaCO 3 estimation, the differences between one person and another in detecting titration end point would be avoided, rapid and accurate results would be obtained compared to titration method. Additionally, time would be saved; fewer amounts of chemicals would be used. From this study, we highly recommend using calcimeter method for CaCO 3 estimation for soils of Sudan.

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Section: Calcimeter Methodsmentioning

confidence: 99%

Assessment of Calcimetric and Titrimetric Methods for Calcium Carbonate Estimation of Five Soil Types in Central Sudan

Elfaki¹,

Gafei²,

Sulieman³

et al. 2016

GEP

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“…Finally, the extent of precipitation of calcium carbonate was assessed via titration with HCl [50] using approximately 10 grams of randomly subsampled cemented sand from the column.…”

Section: Calcium Carbonate Precipitationmentioning

confidence: 99%

Microbially induced calcite precipitation performance of multiple landfill indigenous bacteria compared to a commercially available bacteria in porous media

et al. 2021

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Microbially Induced Carbonate Precipitation (MICP) is currently viewed as one of the potential prominent processes for field applications towards the prevention of soil erosion, healing cracks in bricks, and groundwater contamination. Typically, the bacteria involved in MICP manipulate their environment leading to calcite precipitation with an enzyme such as urease, causing calcite crystals to form on the surface of grains forming cementation bonds between particles that help in reducing soil permeability and increase overall compressive strength. In this paper, the main focus is to study the MICP performance of three indigenous landfill bacteria against a well-known commercially bought MICP bacteria (Bacillus megaterium) using sand columns. In order to check the viability of the method for potential field conditions, the tests were carried out at slightly less favourable environmental conditions, i.e., at temperatures between 15-17°C and without the addition of urease enzymes. Furthermore, the sand was loose without any compaction to imitate real ground conditions. The results showed that the indigenous bacteria yielded similar permeability reduction (4.79 E-05 to 5.65 E-05) and calcium carbonate formation (14.4–14.7%) to the control bacteria (Bacillus megaterium), which had permeability reduction of 4.56 E-5 and CaCO3 of 13.6%. Also, reasonably good unconfined compressive strengths (160–258 kPa) were noted for the indigenous bacteria samples (160 kPa). SEM and XRD showed the variation of biocrystals formation mainly detected as Calcite and Vaterite. Overall, all of the indigenous bacteria performed slightly better than the control bacteria in strength, permeability, and CaCO3 precipitation. In retrospect, this study provides clear evidence that the indigenous bacteria in such environments can provide similar calcite precipitation potential as well-documented bacteria from cell culture banks. Hence, the idea of MICP field application through biostimulation of indigenous bacteria rather than bioaugmentation can become a reality in the near future.

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“…Microbial induced carbonate precipitation (MICP) involves the use of a biochemical process that results in sustainable soil, improvement by decreasing water permeability and increasing soil strength (Harkes et al, 2010). Presence of calcium carbonate in soil plays an important role on soil in maintaining soil pH and nutrient availability (Maulood et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Biofilm Formation and Calcium Precipitation in Bacillus Licheniformis and Alcaligenes Faecalis for Soil Improvemen

Zeb

2023

PJS

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Calcium precipitation and biofilm formation in halophilic bacteria were investigated in the current study. The strain SMK (Bacillus licheniformis) was isolated from plant rhizosphere and and AQ-1 (Alcaligenes faecalis) from marble crushing soil in Lahore. Bacterial growth, biofilm formation and CaCO3 precipitation of both strains was determined under varying stress (pH, temperature, agitation and salinity). Soil aggregation was investigated under salt stress (NaCl and MgSO4). Results showed that pH 8.0, temperature 42°C, 1.5 M salt (NaCl and MgSO4) stress without agitation was favorable for biofilm formation. Both strains were able to precipitate CaCO3 in media specially at margins of colonies in AQ-1. Effervescence of crystals with addition of concentrated HCl showed confirmatory results. Stereomicroscopic analysis of aggregates in inoculated soil and sand showed precipitation under salt stress. SMK (Bacillus licheniformis) showed high aggregation in soil. From the results, it was concluded that these indigenous strains have potential for sustainable agriculture by improving disturbed soil.

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Comparison between Calcimetric and Titrimetric Methods for Calcium Carbonate Determination

Cited by 9 publications

References 6 publications

Assessment of Calcimetric and Titrimetric Methods for Calcium Carbonate Estimation of Five Soil Types in Central Sudan

Assessment of Calcimetric and Titrimetric Methods for Calcium Carbonate Estimation of Five Soil Types in Central Sudan

Microbially induced calcite precipitation performance of multiple landfill indigenous bacteria compared to a commercially available bacteria in porous media

Biofilm Formation and Calcium Precipitation in Bacillus Licheniformis and Alcaligenes Faecalis for Soil Improvemen

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