REMOVAL OF CHROMIUM IONS FROM WATER USING ACID-ACTIVATED BENTONITES AND ADSORPTION MECHANISMS
Referat
The adsorption capacity of activated adsorbents for Cr₂O₇²⁻ ions in water was analyzed, and their adsorption activity sequence was determined as DB15 > DB25 > DB. To enhance the efficiency of the adsorption process, the optimal stirring speed was established at 150 rpm. The most effective adsorbent dose for efficient Cr₂O₇²⁻ ion sorption was found to be 3.0 g/L. The effect of pH on the adsorption process was investigated, revealing that the maximum adsorption efficiency for activated adsorbents was observed at pH = 4.0. The adsorption mechanism was explained by electrostatic interactions, diffusion processes within meso- and macropores of the adsorbent, and complex formation with functional groups on the adsorbent surface.
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