Removal of Phenol by Using Montmorillonite, Clinoptilolite and Hydrotalcite

Abstract

This work is to study the removal of phenol from aqueous solutions by adsorption using three different adsorbents, clinoptilolite, montmorillonite, and hydrotalcite (HT). Except for montmorillonite, the other adsorbents were treated. Clinoptilolite was modified using cetyltrimethylammonium bromide (CTAB) and hydrotalcite was calcined by heating to 550 • C. Adsorption isotherms of phenol on all of the mentioned adsorbents was determined by using the batch equilibration technique and indicated that, the adsorption behavior could be modelled by using the Modified Freundlich equation. The differences observed in the isotherms were explained by the variations in adsorbent-adsorbate interactions under the effects of the different surface structures of adsorbents and the pH dependent ionization behavior of phenol. Calcined hydrotalcite (HTC) was found to be the best among the studied adsorbents since it can adsorb 52% of phenol from a solution containing initially 1 g/L phenol for the 1/100 adsorbent solution ratio while the others can adsorb only 8% of phenol for the same concentration and adsorbent solution ratio.

Adsorption of phenolic compounds on low-cost adsorbents: A review

“…The amount of adsorption was found to be dependent on the relative energies of adsorbent-adsorbate, adsorbate-solvent and adsorbate-adsorbate interaction. The removal of phenol from aqueous solutions by adsorption using three different adsorbents, clinoptilolite, montmorillonite, and hydrotalcite (HT) was studied by Yapar and Yilmaz [27]. Clinoptilolite was modified using cetyltrimethylammonium bromide (CTAB) and hydrotalcite was calcined by heating to 550°C.…”

Phenol sorption on surfactant-modified Mexican zeolitic-rich tuff in batch and continuous systems

“…Furthermore, the sorption of phenol was favorable at pH 6, when the phenol molecule is neutral and the sorption takes place through the partition mechanism [7,9]. Li and Bowman [33] mentioned that HDTMA sorption on other minerals suggests that the packing of HDTMA changes in going from monolayer to bilayer coverage.…”

“…Adsorption in particular has been an effective separation process for a wide variety of applications [5,6]. Sorption of phenol has been studied in different materials such as activated carbon, calcined hydrotalcites, organoclays and zeolites [7][8][9][10][11][12][13][14][15][16][17].…”

The Biosorption of Phenol from Petroleum Refinery Wastewater Using Spent Waste Biomass

“…The last process is the most widely used for treating domestic and industrial effluents due to its relatively simple implementation and low operation costs. However, in water treatment, the most widely used adsorbents are activated carbon (Hanchao et al, 2011), silica (Forland and Blokhus, 2007), montmorillonite (Yapar and Yilmar, 2004), and organophilic clays (Navarro et al, 2009). In recent years, there have been many investigations with the aim of finding more economic, practical, and effective adsorbents for the treatment of phenolic aqueous wastes.…”