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The removal of phenol compounds (such as phenol (Ph), 4-chlorophenol (4-CPh), and 4-phenolsulfonic acid (4-APS)) was studied using catalytic ozonation and cerium oxide (CeO2) as the catalyst. Conve...

The current study presents the treatment of water contaminated with the dye Direct Red 28 in the presence of Na2SO4 at three different concentrations (10, 40 and 80 g/L) by simple ozonation. This w...

The aim of this article is to study the in vivo effect of the ozonation degree of vegetal oils on two related clinical tests, such as inflammation and wound-healing in healthy and diabetic mice, respectively. Ozonated grape seed (GS) and sunflower (SF) oils were used for this purpose. The ozonation degree (from 0 to 44%) of oils was determined by the total unsaturation method (TU). This technique served to quantify the oxidizable substrate of oils and tissue’s lipids. For inflammation studies, an ear edema was induced by croton oil. The latter was treated with GS and SF oils with different ozonation degree, ozonated physiological solution and indomethacin, as reference. To evaluate the wound-healing effect, a circular section was surgically removed from the dorsal side of mice. The wound was treated with ozonated oils, Furacin® ointment (nitrofurazone 2%) and their combination. The TU of lipids (TUL) extracted from inflamed tissues was proposed to identify the biochemical changes in those tissues....

This article describes the study of the treatment of tequila industry vinasses based on the sequential application of coagulation-flocculation and heterogeneous catalytic ozonation. Coagulation-flocculation treatment used biopolymers to reduce the nondissolved organic matter and to reduce the degree of color units in effluent. Among six different substances, chitosan was the most efficient biopolymer to remove the highest chemical organic demand (COD) concentration (84.0%). The response surface technique was used to obtain the best attainable operation conditions of coagulation-flocculation process. The initial organic matter concentration, the reaction period and biopolymer concentration were selected as the independent variables. Two levels of analysis were performed: optimally and sensibility. The best reaction conditions were 3.23 × 104 mg L−1 of initial COD, 125.4 mg L−1 of chitosan concentration, and 60.0 min of reaction. Ozonation process was performed on the effluent of coagulation-floccul...

Physiological solutions ozonated are widely used in the medical field (dentistry and surgery) as an effective bactericide. In this investigation, the inactivation of Escherichia coli and Pseudomonas aeruginosa by ozone dissolved in physiological solution was studied. There is a poor knowledge of the inactivation efficiency of this solution for different bacteria. The efficiency of the microorganisms’ inactivation was evaluated by the total unsaturation of lipids measured by the so-called Double Bond Index (DB-index). This is a sensitive analysis to evaluate the quantity of carbon-carbon double bonds (>C=C

In this study, a set of municipal wastewater (MWW) samples from an actual residual water treatment plant was treated by ozone. The residual water was characterized in terms of organic load and biological contaminants: total coliforms (TC), fecal coliforms (FC) and helminth eggs (HE). Initial values of these parameters were 2.8 × 107 MPN/100 mL, 8.48 × 106 MPN/100 mL, and 470 L−1, respectively. The experimental setup considered the modification of pH and ozone dose as independent variables. Three different initial pH values (4.0, 7.0, and 11.0) and three different ozone concentrations (6, 15, and 30 mg/L) were used to investigate the pH ozone dose effect. The efficiency of ozone-based treatment was determined by the reduction of the microbiological indicators (TC, FC, and HE) and physicochemical parameters (COD and turbidity). The response surface method was used to determine suboptimal reaction conditions. These conditions were obtained using a two-stage procedure. The conditions under which both microbio...