 | Barnes, Ivan, Presser, T.S., Saines, Marvin, Dickson, Peter, Van Groos, A.F.Koster (1982) Geochemistry of highly basic calcium hydroxide groundwater in Jordan. Chemical Geology, 35 (1) 147-154 doi:10.1016/0009-2541(82)90024-9 | Journal (article/letter/editorial) | | OF HIGHLY BASIC CALCIUM HYDROXIDE GROUNDWATER IN JORDAN IVAN BARNES A.F. K O S T E R I , T.S. P R E...of highly basic calcium hydroxide groundwater in Jordan. Chem. Geol., 35: 147--154. Highly-alkaline (pH...origin. INTRODUCTION In the Yarmouk River drainage in Jordan, 30 km north of Irbid, travertine depositing...possibly causing the extremely high pH-values found in Jordan, the last possible basic c o m p o n e n t is CaO...Lime, however, is not a c o m m o n mineral. Portlandite [Ca(OH)2] has been reported from calcareous inclusions |  | | Journal (article/letter/editorial) | | analogues, including the hyperalkaline springs at Maqarin, Jordan (more than 100,000 y), saline, alkaline lakes...conditions of hydraulic gradients in fractured rocks (Maqarin), but may be limited to a few centimetres over...fluids include: fluid mixing (alkaline oil floods, Maqarin), ion exchange (alkaline oil floods, Tournemire)...alkaline oil floods, or at fracture margins at Maqarin, Jordan). Data from industrial and natural analogues...barrier performance, hydraulic gradients, Maqarin, Jordan, Tournemire, France. Introduction * E-mail: |  | | Journal (article/letter/editorial) | | interface will impede further degradation. The extended area in the argillaceous rocks displays an elevated pH...95(OH)12.05∙4H2O) at the expense of primary portlandite and calcium aluminate increasing alkalinity (e...(Stage I). After the release of alkali species, portlandite (Ca(OH)2) is expected to dissolve and pH stabilize...leached away (Stage II). The dissolution of portlandite results in Ca2+ and OH− release to solution:...(1) Ca2+ + SO4 2− + 2H2O → CaSO4∙2H2O Once portlandite has been leached out, cement porewater pH will |
|
