Photoelectrochemical water treatment apparutus and water treatment method using the same

摘要

The present invention relates to a photoelectrochemical water treatment apparatus capable of advanced oxidation by free chlorine species generated through oxidation of chlorine ions, chlorine-based radicals, and hydroxyl radicals. The photoelectrochemical water treatment apparatus according to the present invention can maximize the external solar irradiation area of the photoacid electrode by arranging the counter electrode (reduction electrode) on the outer side of the photoacid electrode to which the photoelectric catalyst is immobilized, and UV irradiation inside the photoacid electrode is It is possible to promote the generation of photoelectrochemical free chlorine species because the photoelectrocatalytic activity immobilized on the photoacid electrode can be simultaneously utilized by installing a light source unit as much as possible. In addition, the photoelectrochemical water treatment apparatus according to the present invention can promote oxidative decomposition of organic pollutants in water by chlorine-based radicals and hydroxyl radicals generated by dissociation of free chlorine species by ultraviolet rays. In addition, the photoelectrochemical water treatment apparatus according to the present invention measures the concentration of free chlorine species in the reaction tank and stops the operation of the lamp when a concentration of free chlorine species is observed above a certain level, thereby generating chlorine-based disinfection by-products due to further oxidation of free chlorine species. Can be reduced.