BENTONITE/CHITOSAN BIOCOMPOSITE AS AN ADSORBENT FOR HEXAVALENT CHROMIUM FROM AQUEOUS SOLUTIONS
Journal Title: JOURNAL OF ADVANCES IN CHEMISTRY - Year 2014, Vol 10, Issue 6
Abstract
The present work focuses on the study of the application of abundant and less expensive materials such as chitosan and bentonite/chitosan biocomposite in the removal of hexavalent chromium. Spectroscopic analysis like techniques FTIR, XRD and BET have been used to characterize the adsorbents. The data indicate that the adsorption of chromium proceeds kinetically according to a pseudo-second order model on both samples and the apparent activation energy (Ea) have been measured to be 22.9 kJ.mol−1 and 84.4 kJ.mol−1 for chitosan and 5%Bt/CS, respectively. The adsorption isotherm experiments show that the adsorption capacity depends on the studied chromium adsorption temperature. It has been found that the data could be well described by the Langmuir as well as the Freundlich models. Thermodynamic parameters (i.e., change in the free energy (DG°), the enthalpy (DH°), and the entropy (DS°) have been also, evaluated.
Authors and Affiliations
Ahlafi Hammou, H. MOUSSOUT, MY. S. SLIMANI, F. BOUKHLIFI, I. DAOU
Keywords
Related Articles
- EP ID EP652757
- DOI 10.24297/jac.v10i6.883
- Views 150
- Downloads 0
A Study on Surface Roughness and Cutting Width for Circular Contour Machining of Stir Cast AA6063/SiC Composites in WEDM
Wire electrical discharge machining is used in machining electric conductive materials with intricate shapes and profiles. This paper presents an experimental investigation on the influence of cutting conditions of WEDM...
Crystal structure and phase transition in the compound [C6H17N3]TlCl5.2H2O
The title compound 1-(2-ammonium-ethyl) piperaziniumpentachlorothallate (III) dihydrate crystallizes in the monoclinic system with space group Cm. The unit cell dimensions are: a = 12.786(5), b = 12.021(5), c = 10.566(5)...
INVESTIGATION OF LIQUID-PHASE OXIDATION OF NAPHTHENE-PARAFFINIC HYDROCARBONS OF BALAKHANY OIL
Liquid-phase aerobic oxidation of naphthene-paraffinic hydrocarbons at 217-330о С of diesel fraction of Balakhany oils in the presence of the mixtures of Mn, Cr salts of natural petroleum acids (MeNPA) has been investi...
Conservation liquids on the bases of turbine oil of grade T-30 and corrosion inhibitor
Conservation liquids have been prepared by adding to T-30 turbine oil different amounts of amidoamine compounds synthesized in 2:1 molar ratio of technical petroleum acids (TPA) to polyethylenepolyamine (PEPA), nitro-com...
Acid Attack on Reinforced Concrete Incorporated with Industrial Wastes
The study was conducted to evaluate the durable characteristics of Reinforced Concrete with silica fume and copper slag. The concrete mix design was done for M40 grade concrete with 7% silica fume as cement and 10 to 30%...