Biogenic Orthorhombic α-Calcium Formate from Sediments of Alkali Lake, Oregon, USA

Чуканов, Н. В.; Menor‐Salván, César; Gurzhiy, Vladislav V.; Izatulina, Alina R.; Pekov, Igor V.; Вигасина, М. Ф.; Ксенофонтов, Д. А.; Britvin, Sergey N.

doi:10.3390/min11050448

Cited by 5 publications

(4 citation statements)

References 42 publications

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“…Importantly, the 1356 and 1392 peaks, as well as the 2800 and 2900 peaks, are all co-localized over the same area on the map. This suggests that this area corresponds to Ca(HCOO) 2 formation as previous studies have shown that FA adsorption on HAP (010) occurs through the transfer of the acidic proton on FA to the surface and HCO – bonding to the surface Ca site. ,, Since the confocal Raman analysis depth is several hundred nanometers into the crystal, HAP parent structure peaks were detected in the areas where Ca(HCOO) 2 was detected, as shown in the combined images. Raman mapping indicates the formation of Ca(HCOO) 2 on the HAP particles but localized to distinct parts of the HAP particles.…”

Section: Resultssupporting

confidence: 58%

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Water Sorption on Formic Acid-Modified Hydroxyapatite as a Function of Relative Humidity: Simulated Environmental Aging Effects on Hygroscopicity and Nutrient Release

Silva

Eisa

Ragauskaitė

et al. 2022

ACS Earth Space Chem.

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Phosphate minerals play an important role in the natural cycle of phosphorous, both in the solid form used in agricultural applications and as aerosolized apatite mineral particles. Mineral surface aging processes, such as organic acid processing, have a significant effect on the phosphate particle physicochemical properties, particularly, their hygroscopicity. In this study, hydroxyapatite was used as a model for low solubility apatite phosphate minerals and subjected to acid processing with formic acid (FA) vapor to simulate the atmospheric processing caused by volatile organic compounds present in the troposphere. Hydroxyapatite particles were shown to react with the FA vapor to form Ca(HCOO) 2 on the particle surface, resulting in a heterogeneous microparticle surface, as evidenced by spatially resolved Raman spectroscopy. Due to the more soluble nature of the Ca(HCOO) 2 formed on the surface, the hygroscopicity of the acid-processed particle surfaces was shown to increase using dynamic vapor sorption studies. The maximum water uptake at 95% RH was shown to increase from 0.4 to 0.82% and 3.26% after 24 and 48 h of laboratory acid exposure, respectively. Conventional adsorption models, including Brunauer−Emmett−Teller and Freundlich, were used to fit the adsorption data. The heat of sorption values of the 48 h acid-exposed sample was shown to converge to the heat of condensation of water at higher coverage values compared to untreated and 24 h processed hydroxyapatite.

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Section: Resultssupporting

confidence: 58%

“…In the case of FA-modified HAP, additional peaks at 1356, 1392, 2880, and 2900 cm –1 were observed. These peaks are attributed to the formation of Ca(HCOO) 2 as the FA vapor reacts with HAP and exhibits new C–H and C–O stretching modes. , …”

Section: Resultsmentioning

confidence: 99%

Water Sorption on Formic Acid-Modified Hydroxyapatite as a Function of Relative Humidity: Simulated Environmental Aging Effects on Hygroscopicity and Nutrient Release

Silva

Eisa

Ragauskaitė

et al. 2022

ACS Earth Space Chem.

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“…This effect is well observed in Figure b, in which the vibrations of C–O and C–H bonds at 1354 and 1380 cm –1 are shifted toward higher frequencies in the presence of calcite dissolution (1355 and 1386 cm –1 , respectively). This behavior can be associated with the differences in the cation sizes and their coordination numbers over the vibrational modes of the FM molecule, affecting the Ca 2+ –O and Na–O bond lengths and allowing a certain degree of distortion. , Thus, it is evident that the interaction between FM and Ca 2+ to produce calcium biformate by the ion exchange reaction led to an enhanced level of calcite dissolution.…”

Section: Resultsmentioning

confidence: 99%

“…This behavior can be associated with the differences in the cation sizes and their coordination numbers over the vibrational modes of the FM molecule, affecting the Ca 2+ −O and Na−O bond lengths and allowing a certain degree of distortion. 66,67 Thus, it is evident that the interaction between FM and Ca 2+ to produce calcium biformate by the ion exchange reaction led to an enhanced level of calcite dissolution.…”

Section: Resultsmentioning

confidence: 99%

Geochemical Impact of High-Concentration Formate Solution Injection on Rock Wettability for Enhanced Oil Recovery and Geologic Carbon Storage

Oyenowo,

Wang,

Mirzaei-Paiaman

et al. 2024

Energy Fuels

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This paper presents new data on core-scale wettability alteration of carbonate porous media with FM concentrations up to 30 wt % in NaCl brine. Experimental data from Amott tests, core floods, calcite dissolution experiments, and zeta potential measurements were analyzed to mechanistically understand the wettability alteration observed in the experiments. Static calcite dissolution tests showed that the degree of dissolution increased with increasing FM concentration in NaCl brine, even with an initially neutral pH. For example, the calcium concentration in the 30 wt % FM solution was 15.9 times greater than that in the NaCl brine with an initial pH of 7.0. Furthermore, reducing the initial solution pH from 7.0 to 6.1 for the 30 wt % FM solution caused the calcium ion concentration to increase by a factor of 3.2. Geochemical modeling and Raman analysis indicated that increased calcite dissolution was caused by interactions between calcium and FM ions. The 30 wt % FM solution with an initial pH of 6.1 yielded 4.7 times greater oil recovery than the NaCl brine in the spontaneous imbibition. The resulting Amott index indicated the wettability alteration to a water-wet state by the FM solution. The 30 wt % FM solution with an initial pH of 7.0 yielded only 30% greater oil recovery than the brine in the spontaneous imbibition; however, it reached nearly the same total oil recovery (spontaneous and forced) as the 30 wt % FM solution with an initial pH of 6.1. A numerical model was calibrated using core flood data, based on which the relative permeabilities indicated the core-scale wettability alteration by FM solutions. Results showed that increasing the FM concentration in the injection brine rendered the initially oil-wet core to a more water-wet state and that the in situ solution pH played an important role in wettability alteration by FM solution in carbonate media.

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Utilization of paper sludge in preparation of high-purity calcium formate

Hassan,

Elseoud

et al. 2023

Biomass Conv. Bioref.

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Paper sludge generated from recycling of printed paper is a negative value waste since cellulosic fibers in the sludge are too damaged to be used in paper making and, more important, the sludge has very high content of ash (up to ~ 35%) and ink residues. To be able to utilize cellulosic fibers in bio-conversion industries which depend on saccharification of the fibers into sugars, de-ashing of the sludge is necessary. The major component of the ash is fillers used in paper making, especially calcium carbonate. In the current work, high-purity calcium formate was prepared utilizing calcium carbonate in the paper sludge — as a zero-value precursor — via treatment with formic acid under controlled conditions. The synthesized calcium formate was characterized using Fourier transform infrared (FTIR), X-ray diffraction (XRD), X-ray fluorescence (XRF), thermogravimetric analysis (TGA), and scanning electron microscopy coupled with energy dispersive X-ray analysis (SEM–EDX). Calcium formate synthesized using paper sludge was compared to that prepared by reacting pure precipitated calcium carbonate and formic acid using the aforementioned tools of analyses. The results confirmed successful preparation of calcium formate with high-purity (99%) with orthorhombic crystal structure from paper sludge as pure as that prepared using pure commercially available precipitated calcium carbonate. The results and approach used in the current work could convert paper sludge to value-added products with high profit and at the same time reduce the huge amounts of land-filled sludge. Graphical abstract

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Biogenic Orthorhombic α-Calcium Formate from Sediments of Alkali Lake, Oregon, USA

Cited by 5 publications

References 42 publications

Water Sorption on Formic Acid-Modified Hydroxyapatite as a Function of Relative Humidity: Simulated Environmental Aging Effects on Hygroscopicity and Nutrient Release

Water Sorption on Formic Acid-Modified Hydroxyapatite as a Function of Relative Humidity: Simulated Environmental Aging Effects on Hygroscopicity and Nutrient Release

Geochemical Impact of High-Concentration Formate Solution Injection on Rock Wettability for Enhanced Oil Recovery and Geologic Carbon Storage

Utilization of paper sludge in preparation of high-purity calcium formate

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