JOURNAL of the Tunisian Chemical Society

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Removal of heavy metals from aqueous solutions using Tunisian smectite clay intercalated by functionalized crown ethers

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Solid-liquid extraction is one of the most used methods for the environment protection and especially for removal of heavy metals. The solid phase used in this work was a Tunisian smectite clay saturated by Na+ , and intercalated by functionalized crown ethers: Dibenzo-14-Crown-4 (NO2)2 (1), Dibenzo-14-Crown-4(NO2)2(Br)2 (2), Dibenzo-14-Crown-4(Br)4 (3) and Dibenzo-14-Crown-4(COOH)2 (4). These new obtained hybrid materials were firstly characterized by X-ray diffraction (XRD), IR spectroscopy and thermal analysis (DSC and DTA-TGA). After that they were used to extract heavy metals (Fe, Cu, Cd, Zn, Pb ,Mn and Co). Extraction percentages by modified clays varied in the following decreasing order Fe3+ ≥ Cu2+ ≥ Pb2+ > Co2+ ≥ Mn2+ > Cd2+ ≈ Zn2+.

B. Chrayet, F. Ammari, A. Ouerghui, F. Meganem

Functionalized crown ethers, Intercalation, Removal of heavy metals, Tunisian Smectite

Pages: 256-263

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