where: “t” is the necessary time(min),for a particle of diameter “d” (mm), to reach a depth of
X (centimeter).
The solid samples were then dried at 105 1C for24 h and then sieved in particles sizes lower than
100 mm. The obtained adsorbents were called; Safi raw clay(SRC),Safi decanted clay(SDC),Berrechid
raw clay(BRC)and Berrechid decanted clay(BDC).
X-ray diffraction(XRD)patterns of the samples were obtained using a PANalytical Xpert Pro model
diffractometer equipped with a monochromatic Cu-Kα (1.541874Å)source operating at 40kV and
40 mA. The diffraction patterns were recorded between 51 and 651 (2θ) degrees.Specific surface area
was determined by using N2 as the sorbate at 77K in a Micromeritics TriStar II 3020 sorptometer.
Samples were out gassed prior to use at 473K a night under vacuum .CEC of the materials was
determined by extensive exchange with 1N ammonium acetate solution,followed by careful washing,
drying and micro-Kjeldahl analysis by acid–base back-titration of the NH3 desorbed from the NH4
homoionized materials.
where: “t” is the necessary time(min),for a particle of diameter “d” (mm), to reach a depth of
X (centimeter).
The solid samples were then dried at 105 1C for24 h and then sieved in particles sizes lower than
100 mm. The obtained adsorbents were called; Safi raw clay(SRC),Safi decanted clay(SDC),Berrechid
raw clay(BRC)and Berrechid decanted clay(BDC).
X-ray diffraction(XRD)patterns of the samples were obtained using a PANalytical Xpert Pro model
diffractometer equipped with a monochromatic Cu-Kα (1.541874Å)source operating at 40kV and
40 mA. The diffraction patterns were recorded between 51 and 651 (2θ) degrees.Specific surface area
was determined by using N2 as the sorbate at 77K in a Micromeritics TriStar II 3020 sorptometer.
Samples were out gassed prior to use at 473K a night under vacuum .CEC of the materials was
determined by extensive exchange with 1N ammonium acetate solution,followed by careful washing,
drying and micro-Kjeldahl analysis by acid–base back-titration of the NH3 desorbed from the NH4
homoionized materials.
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