Date

2010-08-01

Author

Tuerkmenoglu, Asuman Guenal
Göktürk, Emine Hale

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This special issue contains articles based on selected contributions presented during the “Fourth Mediterranean Clay Meeting” held on 5–10 September 2006 at the Middle East Technical University, Ankara. The contents of this special issue originated from the considerable amounts of interest in common between chemists, engineers and geologists, particularly with respect to both mineralogy–chemistry-characterization of clays, and their applications to environmental and engineering problems. In total ten articles are included in this special issue. Hidalgo et al. deal with a degraded soil ecosystem in Mexico because of its important ecological, social and economic consequences. Aringhiari and Lelli present the results of their kinetic study on the decomposition rate and hydrolysis of Na-montmorillonite in aqueous suspensions. The study foresees the behavior of clays under natural environmental conditions in order to understand in more detail the physical degradation of the soil ecosystems. In the research by Píšková et al. High Temperature XRD is used as a tool to characterize the intercalation of smectites and layered double hydroxides with small inorganic and large organic ions in their interlayer space. Koutsopoulou et al. determine the suitability and function of clay materials used in a landfill area and suggest that clay mineral surfaces may serve to retain pollutants. Khodja et al. deal with the optimisation of drilling conditions in an Algerian field. The rheological and filtration characteristics of water based muds mixed with different inhibitory polymers are investigated. Akgün points out to the role of clays as sealing material to protect the natural environment against the possible penetration of radionuclides in the proximity of a high-level nuclear waste repository. Çokça and Tilgen investigate the relationship between shear strength and soil suction of compacted Ankara clay and point out the importance of these variables in civil engineering applications. Vizcayno et al. compare the pozzolanic activity of metakaolin obtained by thermal treatment and amorphous kaolin produced by a mechanochemical treatment. The study shows that active pozzolans could be obtained by both types of treatments of the raw kaolins. Further, Budak et al. investigate the pozzolanic character of heated clays for the purpose of restoration and conservation of historic buildings. Özkan et al. examine the usability of the clay by-product of a gold mine as a secondary raw material in the manufacture of floor tile ceramics while also reducing the environmental problems that are a consequence of its disposal. Overall, the Fourth Mediterranean Clay Meeting succeeded in its aims of bringing scientists together from different fields and from many institutions and countries with common scientific and technical interests in clays and clay minerals. In conclusion, this special issue reflects clearly the current progress and some of the recent findings in Clay Science and in its applications.

Subject Keywords

Geology, Geochemistry and Petrology

URI

https://hdl.handle.net/11511/56568

Collections

Department of Chemistry, Article