COMPOSITION, STRUCTURE AND TEXTURAL …
funnel was used for filtration and then activated bentonite was flushed with 2% solution of Cа(ОH)2 (to remove excess sulfuric ions and neutralize pH value from 1−2 to 4−5). After filtration and flushing, activated bentonite was dried for 2 h at 110 °C, then ground in a mill and sifted trough a sift with aperture size of 160 μm and 100 μm.
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