A method for photocatalytic treatment of landfill leachate based on copper oxide nanoflower

By adjusting the pH value and using intermittent light technology, combined with online monitoring to adjust the light intensity and frequency, the problems of catalyst surface clogging and pH value changes were solved, and efficient and stable photocatalytic treatment of copper oxide nanoflowers in landfill leachate was achieved.

CN119219116BActive Publication Date: 2026-07-10SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Filing Date
2024-11-04
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing photocatalytic methods for treating landfill leachate, the catalyst surface is easily clogged by organic matter, and changes in pH value affect catalytic activity, leading to decreased efficiency and limiting its application effect and stability in complex aquatic environments.

Method used

By adjusting the pH of the landfill leachate to 3-9, using intermittent lighting and stirring, and combining this with online monitoring instruments to dynamically adjust the light intensity and cycle frequency, the catalyst can be ensured to work in a stable environment, preventing the active sites from being blocked.

Benefits of technology

It improves the stability and activity of the catalyst, expands the application potential of photocatalytic treatment, and adapts to efficient treatment under different concentrations of organic matter.

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Abstract

This invention provides a photocatalytic treatment method for landfill leachate based on copper oxide nanoflowers, relating to the field of environmental protection technology. The method includes the following steps: S1 adjusting the landfill leachate to a preset pH value; S2 adding pre-prepared copper oxide nanoflower photocatalyst to the adjusted leachate; S3 conducting a photocatalytic reaction under optimized light conditions; S4 periodically stirring the solution during the reaction to maintain uniform catalyst dispersion; S5 separating and recovering the treated leachate and catalyst after the reaction. By controlling the preset pH value of the leachate and employing intermittent light technology, the problem of catalyst surface active sites being easily blocked by organic matter, leading to a decrease in catalytic efficiency, is effectively solved. Furthermore, an appropriate pH value is beneficial for enhancing the surface charge of the catalyst and improving its ability to adsorb organic pollutants.
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