Article Details
THE CHARACTERIZATION STUDIES OF THE NORTHWEST ANATOLIAN HALLOYSITES/KAOLINITES
Indexed In
Volume 145 / 2012Authors:
Saruhan SAKLAR, Haşim AĞRILI, Okan ZİMİTOĞLU, Bülent BAŞARA, Uğur KAANKeywords:
Halloysite, kaolinite, characterization, leaching.Abstract:
The extraction and characterization studies were carried out on representative samples which were taken from iron bearing parts of halloysite, halloysite/kaolin deposits located in Çanakkale – Balıkesir vicinities in Northwest Anatolia. Halloysites in these samples are generally in the form of hydro halloysite (10 Å) and kaolinite could also be encountered in some parts. Minerals for primary source of pollution in halloysite and kaolin deposits are limonite (geothite) and muscovite. These minerals might contain clay minerals such as; quartz, feldspar, gibbsite, smectite and anatase in their structures. The iron content of the clays can be reduced signifi cantly by hydrochloric or oxalic acid treatments. Transmission electron Microscope (TEM) and Scanning Electron Microscope (SEM) analyses on Halloysite samples were carried out and it was noticed that halloysite tubes were in cylindrical shape, and in some cases; pores on their surfaces could be observed as a structural feature. In samples studied, tube lengths were measured up to 5 μm by means of SEM analyses, however; TEM analyses have indicated that internal diameters of tubes could decrease down to 5nm and their average diameters ranged in between 40 – 50 nm.
