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

Autor: Samira Maria Leão de Carvalho, Marcelo Oliveira Lima, Davi do Socorro Barros Brasil, A. S. C Lopes, Rosivaldo de Alcântara Mendes
Rok vydání: 2015
Předmět:
Zdroj: American Journal of Analytical Chemistry. :528-538
ISSN: 2156-8278
2156-8251
DOI: 10.4236/ajac.2015.66051
Popis: 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.
Databáze: OpenAIRE