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Preparation of Acid-Activated Montmorillonite and Its Application
The natural Na-type montmorillonite (Na-MMT) was treated with HNO 3 to obtain acid-activated montmorillonite (acid-MMT). The materials were characterized by XRD, XRF, SEM, and N 2 adsorption-desorption at low temperature. Results indicated that the structure and textural properties of MMT were significantly changed via acid activation. Meanwhile, the potential use of acid-MMT as adsorbent for the removal of phenol from aqueous solution was evaluated. Important parameters which affected adsorption, such as contact time, pH of solution, and mass of acid-MMT had been investigated. The removal of phenol was decreased with the increase of pH value, and increased with the increase of contact time and mass of acid-MMT. The equilibrium data in aqueous solutions were well represented by the Freundlich isotherm.
Preparation of Acid-Activated Montmorillonite and Its Application
The natural Na-type montmorillonite (Na-MMT) was treated with HNO 3 to obtain acid-activated montmorillonite (acid-MMT). The materials were characterized by XRD, XRF, SEM, and N 2 adsorption-desorption at low temperature. Results indicated that the structure and textural properties of MMT were significantly changed via acid activation. Meanwhile, the potential use of acid-MMT as adsorbent for the removal of phenol from aqueous solution was evaluated. Important parameters which affected adsorption, such as contact time, pH of solution, and mass of acid-MMT had been investigated. The removal of phenol was decreased with the increase of pH value, and increased with the increase of contact time and mass of acid-MMT. The equilibrium data in aqueous solutions were well represented by the Freundlich isotherm.
Preparation of Acid-Activated Montmorillonite and Its Application
Zhao, Yong-Hua (author) / Ma, Fei / Tang, Ke
2016
Article (Journal)
English
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