Experimental and numerical study on the degradation of mefenamic acid in a synthetic wastewater

Abstract

The present work aims to study the degradation of mefenamic acid (MFA) in synthetic wastewater experimentally and numerically. The experiments were carried out using utilizing homemade Cu doped TiO2 in a solar irradiated falling film reactor. Two operating variables are investigated; pH of the wastewater in the range of (3-10) and synthesis wastewater flow rate (1-3 L/min). The numerical study involves the optimization of the variables. The multifactorial design method, Design of Experiments (DOE), and Response Surface Methodology (RSM) were used to evaluate the interaction effect of the two variables on the degradation of mefenamic acid. The significance of 0the results was evaluated by statistical analysis of variance (ANOVA). The results show that the removal efficiency increasing with increasing pH and decreases with wastewater flow rate. The results have shown that the interaction effects between mentioned factors were highly significant in influencing MFA degradation by analyzing statistics and ANOVA.

Catalytic Photodegradation of Cyclic Sulfur Compounds in a Model Fuel Using a Bench-scale Falling-film Reactor Irradiated by a Visible Light

“…that enhancing light illumination on a semiconductor surface boosting the rate at which the (e − −h + ) pairs are formed then increasing the generation rate of •OH radicals resulting in more oxidation of DBT. This link is also obvious in the data from [34][35][36]. Furthermore, the behavior of illumination against DBT degradation in Figure 9 shows a linear relation before the parting point (i.e., 40 W/m 2 , 88.1%), and a nonlinear relation after this point [37,38].…”

Photolysis of tolfenamic acid in aqueous and organic solvents: a kinetic study

“…35,58,61,78,81,[86][87][88] A similar viscosity effect was observed when the photodegradation of fenamates was found to lower with an increase in medium viscosity. 89,90 The temperature of the medium plays a vital role in the viscosity effect on the reaction rate. 84 The opposite result has been observed in the case of the thermal degradation of TA in ethanol-water mixtures.…”