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What is Acid Activation of Bentonite Clays about?
1) The document discusses acid activation of bentonite clays, which increases their surface area and bleaching properties. 2) Acid activation involves leaching interlayer cations and octahedral cations from the bentonite structure, increasing surface area up to 136 m2/gm and 416 m2/gm for the two clay samples. 3) Surface area and bleaching capacity are dependent on the degree of octahedral cation removal by the acid activation process, with optimal dissolution removing around 53% of octahedral ions.
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