Prevention of calcium sulfate formation in seawater desalination by ion exchange

2011 ◽  
pp. 57-64
Author(s):  
Li Zhu ◽  
Cesar B. Granda ◽  
Mark T. Holtzapple
Keyword(s):  
Ion Exchange ◽  
Calcium Sulfate ◽  
Seawater Desalination ◽  
Sulfate Formation

Prevention of calcium sulfate formation in seawater desalination by ion exchange

2011 ◽  
Vol 36 (1-3) ◽  
pp. 57-64 ◽  
Author(s):  
Li Zhu ◽  
Cesar B. Granda ◽  
Mark T. Holtzapple
Keyword(s):  
Ion Exchange ◽  
Calcium Sulfate ◽  
Seawater Desalination ◽  
Sulfate Formation

Self-Hardening of a Gypsum

2017 ◽  
Vol 737 ◽  
pp. 517-521 ◽  
Author(s):  
Victoriya Petropavlovskaya ◽  
Аleksandr Buryanov ◽  
Тatyana Novichenkova ◽  
Kirill Petropavlovskii
Keyword(s):  
Mechanical Properties ◽  
Calcium Sulfate ◽  
The Self ◽  
Limiting Factor ◽  
Sulfate Formation

In this article the self-hardening structure of stone based on calcium sulfate formation is described. Increase of strength of gypsum is possible by additional reinforcing of a stone ettringite crystals. The form and character of the formed crystals is defined by size рН. Dependence рН from the maintenance of additives was investigated in work. The limiting factor of formation of crystals of an ettringite of a necessary look is the maintenance of an additive. In work gypsum composites with the improved physical-mechanical properties on the basis of the modifying complex are received and investigated.

Hydrochemistry of the Dammam Unconfined Aquifer Southern Desert, West Iraq

2020 ◽  
Vol 54 (1A) ◽  
pp. 84-98
Author(s):  
Ali Hussein Ali
Keyword(s):  
Ion Exchange ◽  
Calcium Sulfate ◽  
Unconfined Aquifer ◽  
Water Type ◽  
Dammam Aquifer ◽  
West Iraq ◽  
Poor Class

The type of groundwater in the studied area is slightly brackish. In general, the dominant water type is calcium-sulfate. The reasons behind these different chemical groundwater types can be referred to the active ion exchange between the groundwater of the Dammam aquifer and Rus Formation. The groundwater of the Dammam unconfined aquifer is not suitable for human drinking in all the parameters properties. The groundwater class is fair in the Qasir Al-Ukhaider area, while the Shebcha area and Al-Salman area are poor class except the eastern part of Al-Salman area is very poor.

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