Natural Magnesium Hydrous Orthophosphates Bobierrite and Kovdorskite: FTIR, Raman, Thermal, and Thermochemical Study

Ogorodova, L. P.; Gritsenko, Yu. D.; Вигасина, М. Ф.; Kosova, D. A.; Melchakova, L. V.; Fomina, A. D.

doi:10.1134/s0016702920020093

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…The results of FTIR spectra and TG analysis of dried sludge demonstrated the existence of a composition similar to magnesium phosphate hydrate. 23 The XRD analysis results further confirmed that magnesium phosphate (MP) was the major phase and struvite was present as a minor phase in the sludge sample. Details are presented in Text Section S6 in the Supporting Information.…”

Section: Inorganic Crystals and Eps Of Sludgementioning

confidence: 68%

“…To identify the inorganic crystals in the sludge, FTIR, TG, and XRD analyses were used to analyze the dried sludge. The results of FTIR spectra and TG analysis of dried sludge demonstrated the existence of a composition similar to magnesium phosphate hydrate . The XRD analysis results further confirmed that magnesium phosphate (MP) was the major phase and struvite was present as a minor phase in the sludge sample.…”

Section: Resultsmentioning

confidence: 99%

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Simultaneous Nitrogen Removal and Phosphorus Recovery by Anammox-Induced Magnesium Phosphate Mineralization: Interaction Mechanism between Microorganisms and Mineral Formation

Li,

Chen,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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Phosphorus recovery from wastewater is a vital pathway toward sustainable phosphorus utilization. This study established an effective process for simultaneous nitrogen removal and phosphorus recovery by anammox coupled with magnesium phosphate (MP) crystallization. A high removal efficiency of nitrogen (88.5%) and phosphorus (83.8%) was achieved, with the highest nitrogen removal rate and phosphorus removal rate reaching 1.349 kg/(m 3 d) and 0.083 kg/(m 3 d), respectively. Theoretical calculation and experimental validation demonstrated that MP cannot precipitate under abiotic conditions. MP formation is intricately linked to microbial activity, including the ion reservoir effect of microbial consortia, anammox reaction, and conversion of struvite to MP promoted by anammox bacteria (AnAOB). Meanwhile, the granular sludge with biofilm attached to an inorganic core was obtained. Metagenomic analysis revealed that Candidatus Jettenia caeni replaced Candidatus Kuenenia stuttgartiensis as the prevailing AnAOB under the biomineralization environment, and its maximum relative abundance was 15.48%. Concurrently, correlating to gene up or down regulation, the increases in anammox activity and extracellular protein secretion as well as decreases in cell Mg intake were advantageous to MP formation. These findings provided insights into the interaction between microorganisms and crystal formation, highlighting the significance of anammox bacteria and their symbiotic counterparts in the process.

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Section: Inorganic Crystals and Eps Of Sludgementioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Simultaneous Nitrogen Removal and Phosphorus Recovery by Anammox-Induced Magnesium Phosphate Mineralization: Interaction Mechanism between Microorganisms and Mineral Formation

Li,

Chen,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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“…S6A, are ascribable to the main phases typically constituting MPCs prepared upon reaction of TMP and DAHP solutions, i.e., struvite (MgNH 4 PO 4 Á6H 2 O, which is the reaction product) and unreacted TMP. In particular, the O-H stretching, N-H stretching and bending from struvite [55] and P-O stretching due to both struvite and TMP [55,56] are present in the ATR-FTIR spectra. The spectra of the cements containing gelatin microparticles, shown in Fig.…”

Section: Characterization Of Set Cementsmentioning

confidence: 99%

Alendronate-loaded gelatin microparticles as templating agents for macroporous magnesium phosphate-based bone cements

et al. 2022

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Magnesium phosphate-based cements (MPCs) have recently attracted great attention as materials for bone repair. However, the lack of macroporosity, fundamental for cells permeation and bone ingrowth, is one of the main limitations hampering MPCs full exploitation. In this work gelatin microparticles are exploited as templating agents for the creation of macroporosities in MPCs. In addition, gelatin particles were loaded with a well-recognized drug for the treatment of osteoporosis, alendronate, to locally release the therapeutic agent. Gelatin microparticles of different size were prepared with a simple water-in-oil emulsion method and included in MPCs at various concentrations. The properties of both the MPCs and the final material were characterized by assessing the composite in terms of injectability, setting time, infrared spectroscopy, scanning electron microscopy and confocal Raman microscopy. The MPC-gelatin composites were then incubated in water at physiological temperature, to promote the dissolution of the gelatin, obtain a macroporous cement, and release gelatin and alendronate. The obtained results show that gelatin microparticles have a twofold action as they allow for the formation of MPC with an interconnected and hundreds of µm-sized porosity and the local release of alendronate, resulting in a material with ideal features for bone repair. Graphical abstract

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Magnesium phosphate-based cements containing Halloysite nanotubes for cracks repair

Tonelli

Gelli

Ridi

2021

Construction and Building Materials

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Natural Magnesium Hydrous Orthophosphates Bobierrite and Kovdorskite: FTIR, Raman, Thermal, and Thermochemical Study

Cited by 7 publications

References 14 publications

Simultaneous Nitrogen Removal and Phosphorus Recovery by Anammox-Induced Magnesium Phosphate Mineralization: Interaction Mechanism between Microorganisms and Mineral Formation

Simultaneous Nitrogen Removal and Phosphorus Recovery by Anammox-Induced Magnesium Phosphate Mineralization: Interaction Mechanism between Microorganisms and Mineral Formation

Alendronate-loaded gelatin microparticles as templating agents for macroporous magnesium phosphate-based bone cements

Magnesium phosphate-based cements containing Halloysite nanotubes for cracks repair

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