Catalyst for activating persulfate and application of catalyst in catalysis of persulfate for contaminant removal

Abstract

The invention discloses a catalyst for activating persulfate and application of the catalyst in catalysis of persulfate for contaminant removal. The solid catalyst is prepared by using the following steps: (1) immersing a carrier in water completely, performing stirring so as to wet the carrier sufficiently and obtain slurry; (2) adding a metal salt including a copper salt to the slurry, performing thorough and even mixing, controlling the pH value at 3 or below, and performing impregnation so as to load metal ions onto the carrier; (3) adding an alkaline substance to the mixed system obtainedin the step (2) so as to control the pH value of the system at 7 or above, performing stirring for a reaction at 10-40 DEG C for 30-240 minutes, and separating the solid; (4) washing the solid with water at a pH value of 7-14; and (5) performing drying or natural airing on the solid obtained in the step (4) at 100 DEG C or below so as to obtain the solid catalyst for activating persulfate. The catalyst can be applied to catalysis of persulfate for contaminant removal, high-oxidbility free radicals can be generated by the catalyzed persulfate, and the catalyst has the advantages of safety, high efficiency, stability and wide application.

Description

Technical field

[0001] The invention relates to the technical field of environmental pollutant treatment, and more specifically, to a catalyst for activating persulfate and its application in catalyzing persulfate to remove pollutants. Background technique

[0002] Humans pollute the environment through production activities such as the discharge of domestic sewage and industrial wastewater, solid waste and landfill leachate leakage, environmental emergencies, etc., and the global hydrological cycle causes drinking water sources, rainwater, groundwater, river water bodies, reclaimed water, etc. The widespread pollution of environmental media such as lake water, sea water and soil poses threats to ecological safety and human health. It is urgent to develop safe, efficient and stable treatment technologies to treat sewage, wastewater, solid waste, landfill leachate and other sources. Effective control of organic pollutants, effective removal of pollutants in surface water, groundwa...

Images