Comment on The experimental determination of hydromagnesite precipitation rates at 22.5-75°C by Berninger, U.-N., Jordan, G., Schott, J. and Oelkers, EH
[ X ]
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Mineralogical Soc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this work, we tested the equilibrium constant of hydromagnesite [Mg-5(CO3)(4)(OH)(2) center dot 4H(2)O] at 22.5 degrees C proposed by Berninger et al. (2014) against field observations. By field observations we mean that analytical results originate from samples in the natural environment. In our test, we calculated saturation states of hydromagnesite, using the equilibrium constant of hydromagnesite at 22.5 degrees C from Berninger et al., for the carbonate lakes in Qinghai-Xizang Plateau in China and for Salda Lake in Turkey, based on the hydrochemical data from literature. The predictions based on this equilibrium constant indicate that all of these lakes are strongly under-saturated with respect to hydromagnesite. However, hydromagnesite has been shown to form in all of these lakes. Therefore, this equilibrium constant is clearly in direct contradiction with field observations, leading to the conclusion that the equilibrium constant of hydromagnesite of Berninger et al. (2014) is not suitable for geochemical modelling.
Açıklama
Anahtar Kelimeler
hydromagnesite precipitation, Qinghai-Xizang Plateau, China, Berninger, Salda Lake, Turkey
Kaynak
Mineralogical Magazine
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
81
Sayı
3
