The feasibility of the application of the Photo-Fenton process in the treatment of aqueous solution contaminated by Tylosin antibiotic was evaluated. The Response Surface Methodology (RSM) based on Central Composite Design (CCD) was used to evaluate and optimize the effect of hydrogen peroxide, ferrous ion concentration and initial pH as independent variables on the total organic carbon (TOC) removal as the response function. The interaction effects and optimal parameters were obtained by using MODDE software. The significance of the independent variables and their interactions was tested by means of analysis of variance (ANOVA) with a 95% confidence level. Results show that the concentration of the ferrous ion and pH were the main parameters affecting TOC removal, while peroxide concentration had a slight effect on the reaction. The optimum operating conditions to achieve maximum TOC removal were determined. The model prediction for maximum TOC removal was compared to the experimental result at optimal operating conditions. A good agreement between the model prediction and experimental results confirms the soundness of the developed model.

Today, seawater and brackish water desalination is a subject of concern of many researchers all over the world. The recourse to the desalination by distillation using solar energy represents an appreciable element of the water resource and constitutes a realizable, simple, profitable, operational solution technically. The present study, which is essentially experimental, is interested in the effect of the internal parameters on a double slope plane solar still. In this work, the solar still was conceived and realized by our team of research. The experiments were carried out at different conditions. The variation of the different operating parameters of the solar still has been studied. It is found that the distillate production rate increases when the difference between the temperature of water and glass decreases. Distillated water was also, influenced by the presence of wind and the climatic changes which decrease the amount of diffuse solar energy received by the brackish water. The average yield of distilled water was 4 L/m2 /day

The non-biodegradability of textile wastewater is mainly due to the presence of synthetic dyes. Resistance to bacterial degradation led to the development of new techniques where solar photocatalysis appears to be the best method for this type of application. methylene blue (MB) degradation was studied in TiO₂ and ZnO aqueous suspension using solar energy in a tubular reactor. This study was conducted to evaluate the performance of the prototype and explore the feasibility of this concept for solar photocatalytic oxidation. The main objective of this work was to compare the efficiency of two types of catalysts, which are titanium dioxide (TiO₂) and zinc oxide (ZnO). The use of TiO₂ as a catalyst enables a good degradation of MB which can achieve a disposal rate of 98% after 270 min with a TiO₂ concentration of 0.75 g/L. The same removal rate can be achieved by ZnO but for a much smaller concentration which was 0.025 g/L after 140 min.