Application of catalyst taking waste adsorbent after adsorption-desorption as raw material in treatment of high-salt organic wastewater by activating persulfate

Abstract

The invention relates to an application of a catalyst taking a waste adsorbent after adsorption and desorption as a raw material in treatment of high-salt organic wastewater by activating persulfate.The method comprises the following steps: mixing a waste adsorbent which is desorbed after adsorbing heavy metal ions for multiple times with a nitrogen source, pyrolyzing under an oxygen-free condition to obtain a waste adsorbent-based catalyst, introducing the waste adsorbent-based catalyst into high-salt organic wastewater, and adding persulfate for activating sulfate to generate non-free radicals. Persistent organic pollutants in high-salt organic wastewater are efficiently degraded through non-free radicals, the problem that an adsorbent for adsorbing saturated heavy metal ions cannot beeffectively treated is solved, a new way is provided for degrading pollutants through a non-free radical process of activated persulfate, operation is easy, cost is low, and the method is suitable forindustrial production; meanwhile, the environmental problem can be effectively solved, and waste can be utilized.

Description

technical field [0001] The invention relates to the application of a catalyst using waste adsorbent after adsorption-analysis as a raw material in the treatment of high-salt organic wastewater by activating persulfate, and belongs to the technical fields of waste resource utilization and environment and chemistry. Background technique [0002] In recent years, with the development of my country's industrialization process, the industrial water demand has increased rapidly. At the same time, the resulting volume of industrial wastewater has also surged, putting enormous pressure on current wastewater treatment and reuse technologies. Chemical and pharmaceutical production fields produce a large amount of high-salt organic wastewater, which mainly has the following characteristics: (1) high salt content, up to 10%, has a strong inhibitory effect on microbial treatment; (2) the concentration of organic pollutants in wastewater is high , the composition is complex and affects t...

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Problems solved by technology

However, the regeneration and reuse of the adsorbent saturated with copper ions is also a difficult problem. The adsorbent that adsorbs heavy metals will eventually become solid waste and is called secondary pollution, and there is currently no good treatment method

Because copper ions have good chemical stability after being adsorbed into the adsorbent, they are not easy to be leached out and cannot be effectively treated, so they can only be piled up, which seriously pollutes the environment

[0006] Based on the current problems: the adsorbent for adsorbing copper ions cannot be effectively treated, which seriously pollutes the environment; traditional metal-based catalysts are prone to produce by-products for high-salt organic wastewater, and the treatment effect is low. It is urgent to develop a directional activation process. Catalyst for sulfate degradation of pollutants via non-free pathways

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