Adsorption of p-nitrophenol on activated carbon fixed-bed.
Carbon fixed-beds are usually used to remove organic contaminants. Adsorption in a carbon filter is a dynamic, non-steady process which is not yet completely understood. The objective of this paper is to establish a methodology to simplify the study of this process based on the wave theory, rapid small-scale column test and experimental design/surface response analysis. The constant pattern wave hypothesis was confirmed by the experimental data. The influence of the inlet concentration of p-nitrophenol and the flow rate on dynamic adsorption was studied at 20 degrees C following a central composite design using a second-order model. Both parameters have an important influence on the response variables studied. The methodology used is a useful tool for studying the dynamic process and shows interactions that are difficult to verify by the classical step-by-step method.
Sabio
E
E
Departamento de Ingeniería Química y Energética. Universidad de Extremadura, Avenida. de Elvas s/n, 06071 Badajoz, Spain. Electronic address: esabio@unex.es.
Zamora
F
F
Departamento de Ingeniería Química y Energética. Universidad de Extremadura, Avenida. de Elvas s/n, 06071 Badajoz, Spain.
Gañan
J
J
Departamento de Ingeniería Química y Energética. Universidad de Extremadura, Avenida. de Elvas s/n, 06071 Badajoz, Spain.
González-García
C M
CM
Departamento de Ingeniería Química y Energética. Universidad de Extremadura, Avenida. de Elvas s/n, 06071 Badajoz, Spain.
González
J F
JF
Departamento de Ingeniería Química y Energética. Universidad de Extremadura, Avenida. de Elvas s/n, 06071 Badajoz, Spain.
D000327:Adsorption; D002244:Carbon / Q000737:chemistry* / Q000493:pharmacokinetics*; D005374:Filtration / Q000295:instrumentation; D009596:Nitrophenols / Q000493:pharmacokinetics*; D013499:Surface Properties; D018508:Water Purification / Q000379:methods
D009596:Nitrophenols; D002244:Carbon; C024836:4-nitrophenol