Adsorption of bentazon on CAT and CARBOPAL activated carbon: Experimental and computational study

Autor: Silvia Álvarez Torrellas, Juan García Rodríguez, Danila Luján Ruiz, Agustín Spaltro, Alfredo Juan, Sandra Isabel Simonetti, Patricia E. Allegretti
Rok vydání: 2018
Předmět:
Langmuir
ADSORPTION
Físico-Química
Ciencia de los Polímeros
Electroquímica
Inorganic chemistry
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
01 natural sciences
COMPUTATIONAL SIMULATION
BENTAZON
purl.org/becyt/ford/1 [https]
chemistry.chemical_compound
Adsorption
Bentazon
purl.org/becyt/ford/1.4 [https]
medicine
Freundlich equation
0105 earth and related environmental sciences
Chromatography
ISOTHERM MODEL
Ciencias Químicas
Química
Surfaces and Interfaces
General Chemistry
Carbonaceous adsorbents
021001 nanoscience & nanotechnology
Condensed Matter Physics
CARBONACEOUS ADSORBENTS
Surfaces
Coatings and Films
chemistry
Ionic strength
Computational simulation
Absorption (chemistry)
0210 nano-technology
Carbon
CIENCIAS NATURALES Y EXACTAS
Isotherm model
Activated carbon
medicine.drug
Zdroj: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
ISSN: 0169-4332
Popis: Removal of the bentazon by adsorption on two different types of activated carbon was investigated under various experimental conditions.Kinetics of adsorption is followed and the adsorption isotherms of the pesticide are determined. The effects of the changes in pH, ionic strength and temperature are analyzed. Computational simulation was employed to analyze the geometry and the energy of pesticide absorption on activated carbon. Concentration of bentazon decreases while increase all the variables, from the same initial concentration. Experimental data for equilibrium was analyzed by three models: Langmuir, Freundlich and Guggenheim–Anderson–de Boer isotherms. Pseudo-first and pseudo-second-order kinetics are tested with the experimental data, and pseudo-second-order kinetics was the best for the adsorption of bentazon by CAT and CARBOPAL with coefficients of correlation R 2 = 0.9996 and R 2 = 0.9993, respectively. The results indicated that both CAT and CARBOPAL are very effective for the adsorption of bentazon from aqueous solutions, but CAT carbon has the greater capacity.
Laboratorio de Estudio de Compuestos Orgánicos
Databáze: OpenAIRE
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