G
George E. Christidis
Researcher at Technical University of Crete
Publications - 69
Citations - 2294
George E. Christidis is an academic researcher from Technical University of Crete. The author has contributed to research in topics: Volcanic rock & Clay minerals. The author has an hindex of 24, co-authored 66 publications receiving 1975 citations. Previous affiliations of George E. Christidis include University of Leicester.
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Acid activation and bleaching capacity of bentonites from the islands of Milos and Chios, Aegean, Greece
TL;DR: In this paper, an acid activation with HCl of two bentonites from the Aegean Islands of Milos and Chios, Greece, consisting of Chambers and Tatatilla-type and Otay-type montmorillonite, respectively, resulted in a 4 to 5-fold increase of the surface area of the raw materials.
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Comparative study of the mobility of major and trace elements during alteration of an andesite and a rhyolite to bentonite, in the islands of Milos and Kimolos, Aegean, Greece
TL;DR: In this paper, the water:rock (WR) ratio was found to be as high as 13:1 in both profiles, while in the zeolite-bearing zones it is about 5.5:1.
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Geological aspects and genesis of bentonites.
TL;DR: Bentonites are clay rocks consisting predominantly of smectite as discussed by the authors, and they form mainly from alteration of pyroclastic and/or volcaniclastic rocks and are useful for stratigraphic correlation and for interpreting the geodynamic evolution of our planet.
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Chemical and thermal modification of natural HEU-type zeolitic materials from Armenia, Georgia and Greece
George E. Christidis,Daniel Moraetis,E. Keheyan,L. Akhalbedashvili,N. Kekelidze,R. Gevorkyan,H. Yeritsyan,H. Sargsyan +7 more
TL;DR: In this article, three HEU-type zeolites from Armenia, Georgia and Greece formed from alteration of volcanic glass were treated with dilute KOH and subsequently either reacted with 6N HCl or heated at 700 °C.
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Evidence for photochemical production of reactive oxygen species in desert soils
Christos D. Georgiou,Henry J. Sun,Christopher P. McKay,Konstantinos Grintzalis,Ioannis Papapostolou,Dimitrios Zisimopoulos,Konstantinos Panagiotidis,Gaosen Zhang,Eleni Koutsopoulou,George E. Christidis,Irene Margiolaki +10 more
TL;DR: It is shown that desert soils accumulate metal superoxides and peroxides at higher levels than non-desert soils and the photogeneration of equimolar superoxide and hydroxyl radical in desiccated and aqueous soils by a photo-induced electron transfer mechanism supported by their mineralogical composition.