Kinetics and thermodynamics of the attack of fluorapatite by a mixture of sulfuric and phosphoric acids at 55°C

Antar, K.; Jemal, M.

doi:10.1016/j.tca.2006.09.019

Cited by 15 publications

(9 citation statements)

References 7 publications

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“…Due to the low rate of the transformation deconvoluted and recorded curve overlap as shown on figure 11. Figure 12 gives (Antar and Jemal, 2007). It can be noticed that the mean iteration value of Δ dis H of HH (+12.10 kJ mol −1 ) is very close to the opposite of the previous iteration enthalpy of precipitation of hemihydrate (-12.0 kJ per mole of Ca-sulfate).…”

Section: Transformation Of Ca-sulfate Hemihydrate Into Dihydrate At 55°cmentioning

confidence: 74%

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Jemal¹

2011

Application of Thermodynamics to Biological and Materials Science

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Section: Transformation Of Ca-sulfate Hemihydrate Into Dihydrate At 55°cmentioning

confidence: 74%

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Jemal¹

2011

Application of Thermodynamics to Biological and Materials Science

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“…The recorded signals were processed according to the procedure developed in previous papers [24][25][26][27][28] in order to get the deconvoluted curves and to calculate iteratively both thermodynamic and kinetic parameters from the thermogenesis curves.…”

Section: Kinetic Studymentioning

confidence: 99%

Calorimetric and Potentiometric Studies of Ag⁺ Complexation With Tris(Dimethylamino)Phosphine Sulfide in Acetonitrile Solution

Bennis¹,

Brahim

Alouani³

2015

Phosphorus, Sulfur, and Silicon and the Related Elements

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Complexation of Ag + with tris(dimethylamino)phosphine sulfide (TDPS) [as ligand (L)] in acetonitrile solution was investigated using calorimetry and potentiometry. The knowledge of β j formation constants, by the latter technique, allowed the determination of predominant domains for different species in solution and plotting the repartition curves of species in solution as a function of added ligand concentration. The results obtained from both techniques are in good agreement and show the formation of at least two species in acetonitrile solution (i.e. AgL, AgL 2 …). In addition, this study aims at proposing formal mechanisms for the successive reactions and determining thermodynamic and kinetic parameters for each species.Downloaded by [University of Auckland Library] at 16:

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“…Because of the good compatibility between the physicochemical properties of the fluorapatite film and those of marble, the film can adhere firmly to the marble substrate. Compared with calcite, fluorapatite is insensitive to acid [22]. Fluorapatite can therefore act as a protective film and prevent erosion of calcareous relics by acid rain.…”

Section: Assessment Of the Fluorapatite Filmmentioning

confidence: 99%

Biomimetic fluorapatite films for conservation of historic calcareous stones

et al. 2012

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Fluorapatite protective films were prepared on marble substrates using a biomimetic method. By mimicking the mineralization mechanism of enamel, phosphorus and fluorine were introduced on the surface of the marble substrate. In the presence of a biological template, namely collagen, an integrated fluorapatite film was produced and the marble substrate was entirely covered. The prepared fluorapatite films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive X-ray (EDX) spectroscopy. The performances of the fluorapatite films were evaluated by color changes, capillary water absorption, and acid resistance tests. The results revealed that the fluorapatite films had good compatibility with the marble substrate; the physical properties such as color and capillary water adsorption of the marble substrates were unchanged. The fluorapatite films also had good acid resistance and were stable even in heavy acid rain. biomimetic, fluorapatite film, conservation, calcareous stonesCitation:

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Kinetics and thermodynamics of the attack of fluorapatite by a mixture of sulfuric and phosphoric acids at 55°C

Cited by 15 publications

References 7 publications

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Calorimetric and Potentiometric Studies of Ag⁺ Complexation With Tris(Dimethylamino)Phosphine Sulfide in Acetonitrile Solution

Biomimetic fluorapatite films for conservation of historic calcareous stones

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Kinetics and thermodynamics of the attack of fluorapatite by a mixture of sulfuric and phosphoric acids at 55°C

Cited by 15 publications

References 7 publications

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Thermochemistry and Kinetics of the Reactions of Apatite Phosphates with Acid Solutions

Calorimetric and Potentiometric Studies of Ag+ Complexation With Tris(Dimethylamino)Phosphine Sulfide in Acetonitrile Solution

Biomimetic fluorapatite films for conservation of historic calcareous stones

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Calorimetric and Potentiometric Studies of Ag⁺ Complexation With Tris(Dimethylamino)Phosphine Sulfide in Acetonitrile Solution