Many processes affect the behavior of pesticides in the environment, namely adsorption, transfer, breakdown and degradation. Adsorptiondesorption are a dynamic process in which molecules are continually transferred between the bulk liquid and solid surface. Adsorptiondesorption of pesticides in soils depend upon various factors like soil pH, CEC, clay content, organic matter and metal oxides. T...

The activity of Ni supported on mesoporous SBA-15, MCM-41, KIT-6, and a sol-gel prepared Ni/γAl2O3, for catalysing methane dry reforming was investigated. The chemical and physical characteristics of the catalysts before and after catalytic testing were investigated using X-Ray diffraction, X-ray Photoemission Spectroscopy, Transmission Electron Microscopy, Scanning Electron Microscopy / Energy...

The catalytic wet air oxidation (CWAO) of cationic red GTL over the Fe2O3-CeO2-Bi2O3/γ-Al2O3 catalyst was investigated under mild operating conditions in a batch reactor. The catalyst was prepared by wet impregnation, and characterized by N2 adsorptiondesorption (BET measurement), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The effect of the reaction conditions (catalyst...

3D hierarchical Bi2S3 architectures have been successfully synthesized via a simple and effective hydrothermal process. The as-prepared Bi2S3 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorptiondesorption isotherms, and UV-vis diffuse reflectance spectrum (DRS). The observation of field emission sc...

In this work we have analyzed the adsorption-desorption kinetics in the framework of the lattice gas model. We have shown that the coefficients representing the transition probabilities must be carefully chosen even when they fulfill the principle of detailed balance, otherwise the observables arising from the kinetics present anomalous behavior. We have demonstrated that when the adsorption Ai...

Physicochemical processes of single liquid and solid particles have been studied in an electrodynamic chamber (EDC) in the size from 0.1 to 250 micron and in the temperature range 300-3500 K. From the forces applied on a heated particle suspended in an EDC (gravity, electric, free convection, photophoretic, imposed flow) one can deduce valuable information on significant changes that the partic...

To investigate template effect on physicochemical properties of zeolite and enhance the molecular sieving properties, adsorption of methionine amino acid was studied by spectroscopic methods. Four zeolites such as methionine templated analcime, methionine templated zeolite P, N, N-dibenzyl N,N,N,N-tetramethylethylenediamine (DBTMED) templated analcime and free template analcime were synthesized...

Materials and Methods: Ruthenium hexamine chloride, Fullerene, C60, cetyltrimethylammonium bromide (CTAB), Tetraethoxysilane (TEOS, 98%), chloroform and toluene were obtained from Sigma and used as received. Ethanol (95–96%, Carlo Erba) and HCl (36%, Prolabo) were used for precursor hydrolysis and film deposition. TBAPF6 (Aldrich) was dried for 6 h in vacuum before use. Sodium nitrate was obtai...

1 CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 76(1) JANUARY-MARCH 2016 3 ULY-SEPTEMBER The present study was conducted in order to investigate the adsorption and desorption behavior of tetramethylthiuram disulfide (thiram) using the batch equilibration technique in two soil namely: Ultisols and Inceptisols. The adsorptiondesorption isotherms were expressed by the Freundlich equation. The adsorptio...

Cobalt catalysts supported on γ-alumina, ceria and γ-alumina-ceria, with 10 or 20%wt of cobalt load, prepared by the wet impregnation method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), field emission transmission electron microscopy (FETEM), N2 adsorptiondesorption isotherms (BET/BJH methods), energy-dispersive X-ray spectroscopy (EDX), X-ray photoemission ...