| Summary: | 碩士 === 弘光科技大學 === 職業安全與防災研究所 === 102 === The main purpose of this study is to develop a novel electrochemical system containing electrocoagulation and electro-Fenton. In the first part, we have developed the electrocoagulation system on treatment of dimethyl phthalate wastewater. For treatment of dimethyl phthalate, several parameters were evaluated to characterize the dimethyl phthalate removal efficiency, such as various current densities and temperatures. The effects of the current density and temperature on the electrical energy consumption were also investigated. The optimum current density and temperature were found to be 20 mA/cm2 and 298 K, respectively. Under these conditions, the dimethyl phthalate concentration of aqueous dimethyl phthalate solutions decreased by more than 90 %. The thermodynamic parameters such as Gibbs free energy, the enthalpy, and the entropy indicated that the adsorption of dimethyl phthalate on metal hydroxides was feasible, spontaneous, and endothermic. The experimental data had also compared to different adsorption isotherm models in order to describe the EC process. The adsorption of dimethyl phthalate was best fitted by the Langmuir adsorption isotherm model.
In the second part, the development of the Electro-Fenton system have designed to treat dimethyl phthalate wastewater. Via cathodically generated hydrogen peroxide. To characterize the generated hydrogen peroxide efficiency, several parameters were evaluated i,e by using different cathodes. The cathodically optimum conditions were found to be on activated carbon fiber. In addition, for treatment of dimethyl phthalate by Electro-Fenton. The optimum para meters like pH of the solution pH, Fe2+, current density and temperature were found to be pH=3, 0.5mM, 4mA/cm2 and 298K, respectively.
|
|---|
