Solubility limits of CaSO4 polymorphs in seawater solutions

Marina Lisitsin-Shmulevsky, Xianhui Li, David Hasson, Hilla Shemer, Raphael Semiat

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The solubility limits of CaSO4 polymorphs are of critical importance for determining working conditions of thermal desalination processes. This is because fractional fresh water recoveries in these processes are limited by the threshold precipitation limits of calcium sulfate polymorphs. Partial removal of calcium ions from seawater extends the solubility limits of the CaSO4 polymorphs and enables higher water recoveries. However, information on calcium sulfate solubilities in saline solutions is inadequate as available empirical models display significant deviations between solubilities predicted by the different models. The objectives of the present study were to verify the solubility limits of CaSO4 species in seawater concentrates of reduced calcium content. This was achieved by theoretical extension of the Fabuss and Lu's solubility model followed by experimental verification of the theoretical results using XRD analyses to distinguish between the different CaSO4 polymorphs
Original languageEnglish
Article number114200
JournalDesalination
Volume475
Number of pages7
ISSN0011-9164
DOIs
Publication statusPublished - 2020

Cite this

Lisitsin-Shmulevsky, M., Li, X., Hasson, D., Shemer, H., & Semiat, R. (2020). Solubility limits of CaSO4 polymorphs in seawater solutions. Desalination, 475, [114200]. https://doi.org/10.1016/j.desal.2019.114200
Lisitsin-Shmulevsky, Marina ; Li, Xianhui ; Hasson, David ; Shemer, Hilla ; Semiat, Raphael. / Solubility limits of CaSO4 polymorphs in seawater solutions. In: Desalination. 2020 ; Vol. 475.
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abstract = "The solubility limits of CaSO4 polymorphs are of critical importance for determining working conditions of thermal desalination processes. This is because fractional fresh water recoveries in these processes are limited by the threshold precipitation limits of calcium sulfate polymorphs. Partial removal of calcium ions from seawater extends the solubility limits of the CaSO4 polymorphs and enables higher water recoveries. However, information on calcium sulfate solubilities in saline solutions is inadequate as available empirical models display significant deviations between solubilities predicted by the different models. The objectives of the present study were to verify the solubility limits of CaSO4 species in seawater concentrates of reduced calcium content. This was achieved by theoretical extension of the Fabuss and Lu's solubility model followed by experimental verification of the theoretical results using XRD analyses to distinguish between the different CaSO4 polymorphs",
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Lisitsin-Shmulevsky, M, Li, X, Hasson, D, Shemer, H & Semiat, R 2020, 'Solubility limits of CaSO4 polymorphs in seawater solutions', Desalination, vol. 475, 114200. https://doi.org/10.1016/j.desal.2019.114200

Solubility limits of CaSO4 polymorphs in seawater solutions. / Lisitsin-Shmulevsky, Marina; Li, Xianhui; Hasson, David; Shemer, Hilla; Semiat, Raphael.

In: Desalination, Vol. 475, 114200, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Solubility limits of CaSO4 polymorphs in seawater solutions

AU - Lisitsin-Shmulevsky, Marina

AU - Li, Xianhui

AU - Hasson, David

AU - Shemer, Hilla

AU - Semiat, Raphael

PY - 2020

Y1 - 2020

N2 - The solubility limits of CaSO4 polymorphs are of critical importance for determining working conditions of thermal desalination processes. This is because fractional fresh water recoveries in these processes are limited by the threshold precipitation limits of calcium sulfate polymorphs. Partial removal of calcium ions from seawater extends the solubility limits of the CaSO4 polymorphs and enables higher water recoveries. However, information on calcium sulfate solubilities in saline solutions is inadequate as available empirical models display significant deviations between solubilities predicted by the different models. The objectives of the present study were to verify the solubility limits of CaSO4 species in seawater concentrates of reduced calcium content. This was achieved by theoretical extension of the Fabuss and Lu's solubility model followed by experimental verification of the theoretical results using XRD analyses to distinguish between the different CaSO4 polymorphs

AB - The solubility limits of CaSO4 polymorphs are of critical importance for determining working conditions of thermal desalination processes. This is because fractional fresh water recoveries in these processes are limited by the threshold precipitation limits of calcium sulfate polymorphs. Partial removal of calcium ions from seawater extends the solubility limits of the CaSO4 polymorphs and enables higher water recoveries. However, information on calcium sulfate solubilities in saline solutions is inadequate as available empirical models display significant deviations between solubilities predicted by the different models. The objectives of the present study were to verify the solubility limits of CaSO4 species in seawater concentrates of reduced calcium content. This was achieved by theoretical extension of the Fabuss and Lu's solubility model followed by experimental verification of the theoretical results using XRD analyses to distinguish between the different CaSO4 polymorphs

U2 - 10.1016/j.desal.2019.114200

DO - 10.1016/j.desal.2019.114200

M3 - Journal article

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JO - Desalination

JF - Desalination

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