0000000000541468
AUTHOR
V. Augugliaro
Kinetics of phenol removal by Nocardia species
Phenol removal by pure cultures of Nocardia corallina was studied in a batch reacting system by estimating both the active biomass and the phenol concentration in the liquid during the experiments. A simple kinetic model was tested and the relative constants determined at 37°C.
Kinetic parameter determination in monoculture and monosubstrate biological reactors
The kinetic parameters of a biological reactor, operating under monoculture and monosubstrate conditions, have been determined. Pure cultures of Nocardia corallina and Pseudomonas fluorescens species have been used with phenol as the only organic carbon source. The experimental runs have been carried out both in a batch and in a continuous stirred reactor. The batch results have been interpreted by zero order kinetics in phenol and first order kinetics in biomass. The kinetic-constants have also been calculated. The activation energy has been determined only for the Nocardia species. Using this strain, the continuous reactor, working without biomass recycle, has confirmed the first order ki…
Preparation, Characterization, and Photoactivity of Polycrystalline Nanostructured TiO2 Catalysts.
Various preparations of nanostructured TiO2 starting from Ti(iso-OC3H7)4 or TiCl4 are reported. The samples were characterized by X-ray diffractometry, specific surface area and porosity determinations, scanning and transmission electron microscopy, and diffuse reflectance spectroscopy. 4-Nitrophenol photodegradation in aqueous medium was employed as a probe reaction to test the photoactivity of the catalysts. The photoactivity of some samples derived from Ti(iso-OC3H7)4 was found comparable with that of commercial powders. Calcination after the hydrolysis process was necessary to achieve crystallization of the particles before using them as photocatalysts for the reaction studied. The samp…
Removal of Intermediate Compounds in a Photocatalytic Process
6th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications (SPEA6) -- JUN 13-16, 2010 -- Prague, CZECH REPUBLIC
Glycerol Partial Oxidation in Aqueous Solution by Home Prepared TiO2 Photocatalyst
6th European Meeting on Solar Chemistry and Photocatalysis: Environmental Applications (SPEA6) -- JUN 13-16, 2010 -- Prague, CZECH REPUBLIC
TiO2/ORMOSIL Thin Films Doped with Phthalocyanine Dyes: New Photocatalytic Devices Activated by Solar Light
WOS: 000253222200065
Doped TiO2 Nanomaterials and Applications
This special issue brieflyreviews some trends and factors that have impacted heterogeneous photocatalysis with next generation TiO2 nanophotocatalysts that could absorband make use of both UV (290–400 nm) and visible (400–700 nm) sunlight to enhance process efficiencies, along with some issues of current debate in the fundamental understanding of the science that underpins the field. Preparative methods and some characteristics features of doped TiO2 as well as its environmental applications are presented and described. The next generation of doped TiO2 photocatalysts should enhance overall process photoefficiencies in many cases, since doped TiO2s absorb a greater quantity of solar radiati…
The role of water in the photocatalytic degradation of acetonitrile and toluene in gas-solid and liquid-solid regimes
Photocatalytic degradation of acetonitrile and toluene was carried out both in gas-solid and in liquid-solid regimes by using commercialTiO2samples (Merck and Degussa P25). The investigation was mainly aimed to study the influence of water present in the reaction environment on the mechanism and degradation rate of two probe molecules. In gas-solid regime, the reacting mixture consisted of toluene or acetonitrile, oxygen, nitrogen, and water vapour. The main degradation product of toluene wasCO2with small amounts of benzaldehyde. In the presence of water vapour, the activity ofTiO2Merck remained stable but greatly decreased if water was absent.TiO2Degussa P25 continuously deactivated, even …
Optical properties of TiO2 suspensions: Influence of pH and powder concentration on mean particle size
WOS: 000250584100025
TEMPERATURE DEPENDENCE OF THE OZONE ABSORPTION KINETICS IN AQUEOUS PHENOL SOLUTIONS
(1978). TEMPERATURE DEPENDENCE OF THE OZONE ABSORPTION KINETICS IN AQUEOUS PHENOL SOLUTIONS. Chemical Engineering Communications: Vol. 2, No. 4-5, pp. 219-221.