Removal of chlorobenzene by adsorption from aqueous solutions on the HDTMA-bentonites as a function of HDTMA/CEC ratio

Current Research in Green and Sustainable Chemistry

Salim Bousba¹  Nabil Messikh²  Pierre Magri³  Fayçal Djazi⁴  Marek Rogalski⁴  Nabil Bougdah⁴ 

[1] Corresponding author.;LRPCSI, Université 20 Août 1955, Skikda, Algeria;Département de Génie des Procédés, Faculté de Génie des Procédés, Université Salah Boubnider Constantine 3, Algeria;Département de Pétrochimie et Génie des Procédés, Faculté de Technologie, Université 20 Août 1955, Skikda, Algeria;

关键词: Adsorption;    Bentonites;    HDTMA;    Chlorobenzene;    Cation exchange capacity (CEC);   

DOI  :  

来源: DOAJ

【 摘 要 】

In this work an Algerian natural bentonite was used in the preparation of new adsorbents by impregnation with different mass ratios of hexadecyltrimethylammonium bromide (HDTMA) surfactant. The HDTMA-bentonites adsorbents were prepared according to the HDTMA/bentonite cation exchange capacity (CEC) ratios (HDTMA/CEC). Five HDTMA/CEC ratios (25%, 50%, 100%, 150% and 200%) were used to investigate the effects on the physicochemical characteristics and the adsorptive power of these clays. The characteristics of these adsorbents were studied by X-ray diffraction (XRD), infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The adsorptive power of these clays was studied by batch adsorption of chlorobenzene from aqueous solutions. FTIR and TGA spectra confirm the modification of bentonites by intercalation with HDTMA. XRD spectra of these adsorbents exhibited interlayer spacings from 13 to 20 Å, with maximum interlayer spacing of 20 Å corresponding to the adsorbent with 100% HDTMA/CEC ratio. Adsorption experiments of chlorobenzene indicate that pseudo first order model was suitable for describing the kinetic results. Regarding the equilibrium results, both Langmuir and Freundlich isotherms were fitted well. The adsorbent impregnated with 100% HDTMA/CEC ratio, shows a high percentage of chlorobenzene removal compared to the other adsorbents.

【 授权许可】

Unknown