Arsenate hydroxyapatite: A physico-chemical and thermodynamic investigation

Mahapatra, P. P.; Mahapatra, L. M.; Mishra, Braja Kishori

doi:10.1016/s0277-5387(00)80953-5

Cited by 14 publications

(4 citation statements)

References 4 publications

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“…The thermodynamic solubility products for Ca 5 (AsO 4 ) 3 OH were 10 -45.20 at 35°C, 10 -45.28 at 40°C, 10 -45.34 at 45°C and 10 -45.46 at 50°C in Mahapatra ' s study [20]. And he thinks the solubility product exhibit a similar temperature dependence.…”

Section: Advanced Materials Research Vols 518-523mentioning

confidence: 86%

“…There are few experimental data on the thermodynamic properties of calcium arsenate hydroxyapatite [Ca 5 (AsO 4 ) 3 OH] in literature. The solubility of Ca 5 (AsO 4 ) 3 OH is significantly greater than that of Ca 5 (PO 4 ) 3 OH [17,20,21,22,23,24] which suggested that phosphate substitution in the arsenate compound could significantly reduce their solubilities [8,24,25].…”

Section: Solubility Of Ca 5 (Aso 4 ) 3 Oh (X=0)mentioning

confidence: 99%

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Research Progress on Solubility of Ca5(PxAs1-XO4)3(OH) and Ca5(PxAs1-XO4)3F

Zhu

et al. 2012

AMR

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Solubility studies of apatite in water and acidic media have been focused on the solubility products. Aim at highlighting on current developments, the solubility products of calcium arsenate-phosphate hydroxyapatite/fluorapatite [Ca5(PxAs1-xO4)3(OH)/Ca5(PxAs1-xO4)3 F, 1≥x≥0] in literature is sorted out. Literature values of the solubility products vary greatly. These discrepant solubility products can be due to differences between the minerals, the way the experiments in the studies have been conducted, the failure to achieve equilibrium.

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Section: Advanced Materials Research Vols 518-523mentioning

confidence: 86%

Section: Solubility Of Ca 5 (Aso 4 ) 3 Oh (X=0)mentioning

confidence: 99%

Research Progress on Solubility of Ca5(PxAs1-XO4)3(OH) and Ca5(PxAs1-XO4)3F

Zhu

et al. 2012

AMR

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“…The modelling using JESS predicts that all the arsenic will be present as the solid species Ca 10 (OH) 2 (AsO 4 ) 6 (Mahapatra et al, 1987) The available thermodynamic data for antimony have been recently critically reviewed and evaluated (Filella and May, 2003) and represent the best information available at present on antimony equilibria in aqueous solutions. The most relevant and recommended stability constants are shown in (Bagnall, 1973;Ahmad et al, 1987 and altaite (PbTe) (Ellis, 2005).…”

Section: Arsenic Antimony and Bismuthmentioning

confidence: 99%

Review of trace toxic elements (Pb, Cd, Hg, As, Sb, Bi, Se, Te) and their deportment in gold processing. Part 1: Mineralogy, aqueous chemistry and toxicity

et al. 2011

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with further research based on gaps in the current knowledge of the thermodynamics and kinetics of these systems, will support the development of computer models to predict the chemical speciation and deportment of these elements through the various stages of the gold cyanidation process. The review covers lead, cadmium, mercury, arsenic, antimony, bismuth, selenium, and tellurium. Presented in this paper is the first part of this review which is a collation of the relevant information on trace element mineralogy, aqueous solution chemistry and toxicity.Although there is much information available about the aqueous solution chemistry of the trace elements, their chemistry in cyanide leach solutions remains largely unexplored. Chemical speciation modelling can assist in understanding the chemistry of the trace elements in gold cyanidation solutions, however, many significant differences exist between the predicted speciation of these trace elements for different types of modelling software. This is due to differences in the thermodynamic data used, the paucity of data that exists under appropriate non-ideal conditions, and the methods used by the software packages to estimate thermodynamic parameters under these conditions.The trace elements reviewed, particularly the species that exist in aqueous solutions, generally have significant toxicities to humans, and more so to plants and animals.Cadmium, mercury and arsenic are classified as human carcinogens whereas selenium is an essential trace element for human health, but is toxic in excess. This review

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“…However, since arsenate (AsO4 3-) may substitute for phosphate (PO4 3-) in laboratorysynthesised samples of hydroxyapatite (e.g. Lee et al, 2009;Mahapatra et al, 1987), this has also been posited for diagenetic replacements in skeletal bioapatite (Dudgeon et al, 2016;Shafer et al, 2008). In order to evaluate if diagenetic uptake of As may be distinguished from biogenically incorporated As, Dudgeon et al studied the spatial distribution of As in archaeological bones and teeth (Dudgeon et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Potential dietary, non-metabolic accumulation of arsenic (As) in seaweed-eating sheep's teeth: Implications for archaeological studies

Blanz

Britton

Grant

et al. 2018

Journal of Archaeological Science

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Evaluating the extent of an individual's exposure to arsenic, (potentially) indicative of proximity to smelting activities, poisoning, or dietary history, has proven difficult in archaeological contexts due to uncertainties surrounding how arsenic biogenically accumulates in the tissues commonly found at archaeological sites such as bone and tooth, in addition to issues of diagenesis. In this study, teeth of modern sheep naturally exposed to high amounts of arsenic by means of seaweed in their diet are compared to the teeth of a less exposed 'control group' of modern sheep consuming predominantly grass. Through analysis of total arsenic and other element concentrations in samples of enamel, cementum and dentine by hydride generation atomic fluorescence spectrometry (HG-AFS), as well as by bioimaging of radial tooth sections of sheep molars by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), this research demonstrates that arsenic in the teeth of sheep exposed to dietary arsenic predominantly accumulates in the infundibulum and occlusal dentine. The major route of uptake of arsenic in these teeth is therefore likely not by ingestion and metabolisation during growth of the tooth, as is thought to be the case for lead and barium, but rather due to direct surface contact, potentially even occurring during mastication. The implications of this type of in vivo chemical alteration of teeth for archaeological trace element studies are explored.

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Arsenate hydroxyapatite: A physico-chemical and thermodynamic investigation

Cited by 14 publications

References 4 publications

Research Progress on Solubility of Ca<sub>5</sub>(P<sub>x</sub>As<sub>1-X</sub>O<sub>4</sub>)<sub>3</sub>(OH) and Ca<sub>5</sub>(P<sub>x</sub>As<sub>1-X</sub>O<sub>4</sub>)<sub>3</sub>F

Research Progress on Solubility of Ca<sub>5</sub>(P<sub>x</sub>As<sub>1-X</sub>O<sub>4</sub>)<sub>3</sub>(OH) and Ca<sub>5</sub>(P<sub>x</sub>As<sub>1-X</sub>O<sub>4</sub>)<sub>3</sub>F

Review of trace toxic elements (Pb, Cd, Hg, As, Sb, Bi, Se, Te) and their deportment in gold processing. Part 1: Mineralogy, aqueous chemistry and toxicity

Potential dietary, non-metabolic accumulation of arsenic (As) in seaweed-eating sheep's teeth: Implications for archaeological studies

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