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has been cited by the following article:

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

  AUTHORS: Anna Sylmara da Costa Lopes, Samira Maria Leão de Carvalho, Davi do Socorro Barros Brasil, Rosivaldo de Alcântara Mendes, Marcelo Oliveira Lima

  KEYWORDS: Adsorption, Activated Carbon, Surface Modification, Benzene, Toluene

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.6 No.6, May 8, 2015

  ABSTRACT: 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.