Surface Modification of Commercial Activated Carbon (CAG) for the Adsorption of Benzene and Toluene


In this work, we determined the surface characteristics of natural (CA-1) and HNO3 treated (CA-2) CAG. Equilibrium, kinetics and breakthrough for adsorption of benzene and toluene by CA-1 and CA-2 were studied. Concentrations of benzene and toluene (mg/L) were determined by gas chromatography with headspace extraction. The data of adsorption kinetic and equilibrium were best fitted by pseudo-second order model and Langmuir isotherm, respectively. The best results of benzene and toluene adsorption from fixed bed were obtained at volumetric flow rate (Q1 = 70 mL/min) using adsorbent CA-2. The study of inferential statistics revealed that CA-1 and CA-2 adsorbents are statistically different at a 5% significance level.

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da Costa Lopes, A. , de Carvalho, S. , do Socorro Barros Brasil, D. , de Alcântara Mendes, R. and Lima, M. (2015) Surface Modification of Commercial Activated Carbon (CAG) for the Adsorption of Benzene and Toluene. American Journal of Analytical Chemistry, 6, 528-538. doi: 10.4236/ajac.2015.66051.

Conflicts of Interest

The authors declare no conflicts of interest.


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