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Adsorption Characteristics of Atrazine on Granulated Activated Carbon and Carbon Nanotubes
Author(s) -
Rambabu N.,
Guzman C. A.,
Soltan J.,
Himabindu V.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100376
Subject(s) - adsorption , freundlich equation , activated carbon , exothermic reaction , aqueous solution , chemistry , langmuir , carbon nanotube , kinetics , exothermic process , chemical engineering , endothermic process , carbon fibers , thermodynamics , materials science , organic chemistry , composite material , composite number , physics , quantum mechanics , engineering
Adsorption of atrazine (ATZ) from aqueous solutions by granular activated carbon (GAC) and carbon nanotubes (CNT) was studied in a batch‐mode adsorption system at different initial concentrations of ATZ (1.0–30.0 mg L –1 ) and at three temperatures of 288, 296 and 304 K. The adsorption isotherms of Langmuir, Freundlich, Polanyi–Manes, and Brunauer–Emmett–Teller (modified) were used to model the process. The adsorption kinetics followed a pseudo‐second‐order kinetic model. The thermodynamic parameters Δ H 0 , Δ S 0 , and Δ G 0 of the adsorption were estimated. The thermodynamic parameters indicate that the adsorption process is spontaneous and exothermic.