The kinetics of dissolution of calcium sulfate dihydrate

Liu, Sung-Tsuen; Nancollas, G.H.

doi:10.1016/0022-1902(71)80205-1

Cited by 88 publications

(35 citation statements)

References 7 publications

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“…The main difference in the dissolution kinetics between gypsum and anhydrite lies in the power of the term n. It was shown by Zdanovsky (1956), Liu & Nancollas (1971 and James & Lupton (1978) that the gypsum dissolution follows the first order equation, while the dissolution rate of anhydrite obeys the second order equation. The latter reflects partial control of the surface I reaction rate, which is assumed to be hydration.…”

Section: The Dissolution Kinetics Of Gypsum and Anhydritementioning

confidence: 99%

The dissolution and conversion of gypsum and anhydrite

Klimchouk¹

1996

IJS

112

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The development of karst is a complex system driven by the dissolution of a host rock and the subsequent removal of dissolved matter by moving water. It is the process that, at various stages, initiates or triggers associated processes including erosion, collapse and subsidence. The dissolution of sulphate rocks proceeds by different mechanisms and at different rates to those associated with the dissolution of carbonate rocks. For each rock type different factors influence the process. This chapter is an attempt to summarise the present knowledge of the dissolution chemistty and kinetics of gypsum and anhydrite. These are important for the genetic interpretation of karst features in these rocks. The gypsum-anhydrite-gypsum transitions and recrystallization processes are also addressed, because of their importance to karst development.Many studies have been undertaken on the solubility and dissolution of sulphate minerals, in the context of construction engineering and karst processes. Important works include these of

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Section: The Dissolution Kinetics Of Gypsum and Anhydritementioning

confidence: 99%

The dissolution and conversion of gypsum and anhydrite

Klimchouk¹

1996

IJS

112

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“…8,9 Studies of dissolution/growth kinetics and mechanisms are pertinent to all these areas in order to develop knowledge and understanding of natural systems, and to optimize the use of CaSO 4 minerals in technological applications. 10,11 The dissolution of gypsum has been studied by many techniques, ranging from macroscopic kinetic measurements on particulate systems, 12 to high resolution microscopic studies using atomic force microscopy (AFM). 13 A recent review by Colombani 14 sought to correlate various macroscopic kinetic measurements of gypsum dissolution in order to extract a unified surface dissolution rate, by estimating the likely mass transport rates associated with different techniques.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic Kinetics of Gypsum and Calcium Sulfate Anhydrite Dissolution: Surface Selective Studies under Hydrodynamic Control and the Effect of Additives

et al. 2011

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Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes the work of researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-forprofit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. Publisher's statement:This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, © American Chemical Society after peer review. To access the final edited and published work see http://dx.doi.org/10.1021/jp201718b A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription.

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“…Komatsu and Murakami (1994) measured flow speeds of 1.6 cm s Ϫ1 with a current meter, whereas flow-speed estimates using gypsum-dissolution techniques at the same location in a macrophyte forest were much higher at 5.7 cm s Ϫ1 . Mass transfer of gypsum to the water is controlled by the thickness of the diffusive boundary layer around the gypsum objects and the concentration gradient across the diffusive boundary layer (Barton and Wilde 1971;Liu and Nancollas 1971;James and Lupton 1978;Opdyke et al 1987). The diffusive boundary layer is a bottleneck for the transfer of solutes and gases because the transfer is controlled by molecular diffusion in the diffusive boundary layer.…”

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Gypsum dissolution is not a universal integrator of ‘water motion’

Porter

Sanford

Suttles

2000

Limnology & Oceanography

105

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The dissolution of gypsum or plaster of Paris has been widely used as an inexpensive integral measure of 'water motion' in the field and in laboratory tanks for studies of physical-biological interactions. Commonly, gypsumdissolution rates have been calibrated to steady flow speed or velocity in the laboratory and the calibrations have been applied to dissolution (i.e., mass-transfer) rates in the field or in tanks. We evaluated the gypsum-dissolution technique in a steady-flow, a fluctuating-flow, and a mixed-flow environment by comparing dissolution rate to direct flow measurements with an acoustic Doppler velocimeter. We found that dissolution rates were related to steady flow and to fluctuation intensity in the exclusively steady-flow and fluctuating-flow environments, respectively. The relationships were weak in the mixed-flow environment. Finally, dissolution and thus mass-transfer relationships were different in each flow environment, and the effects of steady flow and fluctuation intensity were not additive. Providing that it is rigorously checked and appropriately calibrated, the dissolution technique can be used to measure steady flow speed or fluctuation intensity in a steady-flow or fluctuating-flow environment, respectively. However, comparisons of dissolution rates between steady-flow, fluctuating-flow, and mixed-flow environments or within environments that change over time to determine water motion will be misleading. The gypsum-dissolution technique can be used as a good direct indicator of mass-transfer rates. However, mass-transfer rates are different in different flow environments. The gypsum-dissolution technique is not a universal integrator of 'water motion. ' The dissolution of gypsum or gypsum-based plaster of Paris from ''plaster balls'' or ''clod cards'' was first introduced by Muus (1968) and Doty (1971) as an inexpensive technique to measure water flow in the absence of expensive field instrumentation for direct measurements of water velocity. Effects of temperature, salinity, and water volume on dissolution rates were subsequently investigated by Jokiel and Morrissey (1993) and Thompson and Glenn (1994). Since its first introduction, the gypsum-dissolution technique has been widely used in many habitats and for many applications, especially for studies of physical-biological interactions (Table 1). The gypsum-dissolution technique has been thought to provide a comparative or absolute measure of water movement that ''incorporates any water motion due to tidal as well as wind-wave effects in the same integrated measure' ' (Wildish and Kristmanson 1997). Furthermore, the dissolution technique has expanded to include materials other than gypsum (e.g., Koehl and Alberte 1988;Bartol et al. 1999). AcknowledgmentsWe thank W. Boicourt for letting us participate in the field ''Tower'' experiment and for providing the temperature and salinity data to calibrate the field-dissolution results. We thank K. Sebens, D. Stoecker, V. Kennedy, M. Palmer, and three anonymous reviewers for ...

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The kinetics of dissolution of calcium sulfate dihydrate

Cited by 88 publications

References 7 publications

The dissolution and conversion of gypsum and anhydrite

The dissolution and conversion of gypsum and anhydrite

Intrinsic Kinetics of Gypsum and Calcium Sulfate Anhydrite Dissolution: Surface Selective Studies under Hydrodynamic Control and the Effect of Additives

Gypsum dissolution is not a universal integrator of ‘water motion’

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