Encyclopedia of Geobiology

2011 Edition
| Editors: Joachim Reitner, Volker Thiel


  • Andreas Reimer
  • Gernot Arp
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-9212-1_8

The term “Alkalinity ,” commonly denoted by TA (also AT, ALK, and others) and then called titration alkalinity or total alkalinity, refers to a very important chemical concept in aquatic chemistry. Total alkalinity is one of the few measurable quantities in natural waters that allows, together with other properties, to calculate concentrations of single species of the carbonate system such as CO2, HCO3, CO32−, H+, and OH (Wolf-Gladrow et al., 2007), and further on, the saturation state of the waters with respect to certain carbonate minerals. Therefore, alkalinity represents a hydrogeochemical key parameter for the understanding of carbonate precipitation, either biologically mediated or not, and its variation through the geological history.


From its determination by titrimetric techniques, alkalinity has historically been defined as the number of equivalents of a strong acid required to neutralize 1 L of water at 20°C. The obtained end-point, corresponding to the second...


Saturation Index Total Alkalinity Proton Donor Soda Lake Carbonate Precipitation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Andreas Reimer
    • 1
  • Gernot Arp
    • 1
  1. 1.Geobiology Group Geoscience CenterUniversity of GöttingenGöttingenGermany