Some Physicochemical Properties Of A Clay Containing Smectite And Palygorskite

摘要

A sample of brown clay from the commercially mined Sungurlu deposit (Corum, Turkey) was examined in terms of its mineralogy, morphology and porosity by particle size analysis, X-ray diffraction, chemical analysis, cation exchange, Fourier transform infrared spectroscopy, Mossbauer spectroscopy, electron microscopy, thermal analysis, and nitrogen adsorption/desorption techniques. The fraction of particles with diameters < 2 μm in the aqueous dispersion was 83% (v,v). The moisture content and cation exchange capacity of the clay were 12.1 mass % and 0.85 eq/g, respectively. Total mass loss between 25-1000 ℃ was 22.1%. Two different recrystallization temperatures for the clay are 860 and 980 ℃. The sample contained iron rich calcium smectite (CaS), fibrous palygorskite (P), and quartz (Q). The specific values of surface area, micropore volume, mesopore volume, and micro-mesopore volume were 208 m~2 g~(-1), 0.074 cm~3 g~(-1), 0.158 cm~3 g~(-1), and 0.232 cm~3 g~(-1) respectively.