R Andreozzi

..The use of kinetic constants from the literature in the model allows to simulate the system behavior by taking into account the influence of pH, hydrogen peroxide, Fe(III) and sulfate concentrations and the ionic strength...

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..The temperature dependence of rate parameters for the proposed model is also assessed...

..The possibility of removing CBZ from STP effluents is studied by characterizing its ozonation process through the assessment of kinetics and the distribution of oxidation products...

..A model previously developed for the oxidation of 3,4-dihydroxybenzoic acid has been satisfactorily used to describe the oxidation of 1,2-benzenediol (catechol), 2-aminophenol and 2,3-dihydroxybenzoic acid...

..Isothermal experiments are carried out in various conditions to assess the involved reaction network and reaction kinetics...

..This effect has been correctly described in the terms of a complex formed with the low oxidation-state manganese, which successively reacts with the dissolved ozone...

..A moderate pressure increase has been recorded at the end of all runs. Many thiophosphoric compounds have been identified among the decomposition products...

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..A proper mathematical model has been developed and used to simulate the system behaviour..

..In particular, it has been investigated in adiabatic conditions both the batch addition of acetic anhydride and the effect of an initial temperature higher than those required by the process...

..This approach is suggested as a preliminary screening to identify the hazards associated with an accidental decomposition either of pure chemicals or of mixtures of compounds...

..Subsequent oxidative ring cleavage leads to carboxylic acid fragments via classic degradation pathways. In the pH range 5.0-6.0 kinetic constants (1.76 x 10(4)-1.84 x 10(4) M(-1) s(-1)) were estimated for diclofenac ozonation...

..The occurrence of internal mass-transfer limitation for the adopted granulometric fraction of the catalyst is demonstrated...

..The assessment of by-products biodegradability and acute toxicity demonstrates that ozonation is a suitable technique to improve the biodegradability and reduce the toxicity of waters containing BZF...

..58-3.78 Lmol(-1)s(-1) and 0.69-0.78 Lmol(-1)s(-1) for the systems irradiated by UV lamp and sunlight, respectively...

..53 x 10(5) M(-1)s(-1) at pH = 3.0 and 4.93 x 10(5) M(-1)s(-1) at pH = 6.7) and OH radicals (4.37 x 10(9) M(-1)s(-1) at pH = 5.5 and 4.59 x 10(9) M(-1)s(-1) at pH = 7.5) are also evaluated...

..e., -OH, -CH3, -Cl, -NO2) into the aromatic structures. The search for easy structure-reactivity relationships is also attempted by means of contributing group methods...

..No direct evidences of attack on sulfur atom with sulfoxide formation are found. A kinetic investigation is carried out allowing the assessment of the kinetics of direct ozone attack and that of OH radicals to amoxicillin...

..A kinetic model is developed and used to simulate the behaviour of the system...

..Main reaction intermediates and products are identified for both systems by HPLC and GC-MS analyses and a kinetic characterization is achieved...

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..A validation of assessed kinetics at clofibric acid concentrations as low as those found in STP effluents is presented for both systems...

..The dependence of reaction kinetics on the temperature in the range of 285-308K has also been investigated...

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..The operating costs are estimated for the solar modified photoFenton-ozonation process...

..When present, humic acids act as inner filters towards carbamazepine and diclofenac, and as photosensitizers towards sulphamethoxazole, clofibric acid, oflaxocin and propranolol...