A one-step synthesis of 4-hydroperoxyifosfamide and 4hydroperoxytrofosfamide is described. The method involves direct ozonation of ifosfamide and trofosfamide and offers improved yields in comparison with Fenton oxidation and greater convenience in comparison with ozonation of the appropriate 3-butenyl phosphorodiamidate. Evaluation of the 4-hydroperoxy derivatives of cyclophosphamide, ifosfami...

A one-step synthesis of 4-hydroperoxyifosfamide and 4hydroperoxytrofosfamide is described. The method involves direct ozonation of ifosfamide and trofosfamide and offers improved yields in comparison with Fenton oxidation and greater convenience in comparison with ozonation of the appropriate 3-butenyl phosphorodiamidate. Evaluation of the 4-hydroperoxy derivatives of cyclophosphamide, ifosfami...

This study presents biotreatment of textile wastewaters using electrocoagulation and ozone processes. Ozonation process gave better results than electrocoagulation process. For electrocoagulation, optimum working conditions were found as follows: pH, 6.5; electrode type, iron electrode; current density, 20 mA/cm2; and reaction time, 15 min. Under these circumstances, values determined for elect...

The possibility of applying main AOP techniques, namely ozonation, H2O2/UV photolysis and TiO2 photocatalysis to provide a significant reduction of toxicity of pharmaceutical mixtures has been evaluated. For the preparation of the mixture six pharmaceuticals were chosen among those found at highest concentrations in Sewage Treatment Plant effluents, namely carbamazepine, clofibric acid, diclofe...

The article evaluated the degradation of the captopril in aqueous solution after ozonation and chlorination. The process was continuously monitored focusing on the identification, mass spectrometry and elucidation of its by-products by applying direct infusion and high performance liquid chromatography, electrospray ionization high resolution mass spectrometry, in the negative ion mode. The cyt...

Process waters in deinking mills often feature a strong coloration, due to dyes and pigments released from the recovered paper. This can usually be remediated by pulp bleaching treatment with appropriate chemicals. However, the red shade (from rhodamine dye) is resistant to conventional bleaching treatments. This largely limits the use of deinked pulp in white paper grades. In this review, the ...

The mechanism of the ozonation of isopropyl alcohol was investigated for the gas and the solution phase using second-order many body perturbation theory and density functional theory (DFT) with the hybrid functional B3LYP and a 6-311++G(3df,3pd) basis set. A careful analysis of calculated energies (considering thermochemical corrections, solvation energies, BSSE corrections, the self-interactio...

The elimimation of mefenamic acid has been carried out by photolysis, ozonation, adsorption onto activated carbon (AC) and combinations of the previous single systems (O3+AC and O3+UV). The results obtained indicate that mefenamic acid is not photo-reactive, showing a relatively low quantum yield of the order of 6 x 10 mol Einstein. Application of ozone to mefenamic aqueous solutions instantane...