A method for green resource treatment of rare earth ammonium sulfate waste liquid

By adding KOH modified fly ash material to the rare earth ammonium sulfate waste liquid, the problem of removing heavy metals and ammonia nitrogen in the waste liquid is solved, the removal of harmful components and the retention of beneficial components is achieved, and the utilization value of waste liquid in saline-alkali soil is enhanced.

CN119263441BActive Publication Date: 2025-04-01INNER MONGOLIA UNIV OF SCI & TECH +1
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Patent Information

Application Number
CN202411798326.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-09
Publication Date
2025-04-01
Estimated Expiration
2044-12-09

AI Technical Summary

Technical Problem

Rare earth ammonium sulfate waste liquid contains harmful components such as ammonia nitrogen and heavy metals, which are difficult to effectively remove, and its resource utilization is restricted by the negative accumulation effect of soil and plants.

Method used

KOH modified fly ash material is used to mix it with rare earth ammonium sulfate waste liquid, and is prepared by dry modification treatment and dissolving solution to achieve precipitation removal of heavy metal ions and retention of ammonia nitrogen, and potassium ions are introduced to improve the saline-alkali soil environment.

Benefits of technology

It effectively removes heavy metal ions in rare earth ammonium sulfate waste liquid, retains beneficial components, improves water quality, enhances the application value of waste liquid in saline-alkali soil, and promotes the growth and development of crops.

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Abstract

The invention provides a method for green resource treatment of rare earth ammonium sulfate waste liquid, relates to the technical field of wastewater treatment, and comprises the following steps: S1, drying a fly ash sample to constant weight; S2, pre-grinding lamellar KOH to 200 meshes, drying to constant weight, and obtaining KOH powder; S3, mixing the KOH powder with fly ash in a mass ratio of 2:3, and performing dry modification treatment on the fly ash by using KOH to obtain a KOH-fly ash composite material; S4, dissolving the KOH-fly ash composite material in deionized water to obtain a KOH-modified fly ash material; S5, taking 10 mL of the KOH-modified fly ash material and adding it to 200 mL of rare earth ammonium sulfate waste liquid, stirring, and standing for treatment; the invention proposes for the first time to add the KOH-modified fly ash material to the rare earth ammonium sulfate waste liquid, thereby avoiding the cost of directly treating ammonia nitrogen and heavy metals in the waste liquid, and the process is simple, thereby providing a new way to utilize the rare earth ammonium sulfate waste liquid.
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