A stabilized reductive iron-sulfur-based slurry and its preparation method and application

Stabilized reducing iron-sulfur-based slurry was prepared by combining organic matter with coagulants, which solved the problems of unstable storage and easy oxidation and agglomeration of iron-sulfur-based materials in water treatment. It achieved efficient removal of heavy metals from water and avoided secondary pollution, making it suitable for large-scale application.

CN119528315BActive Publication Date: 2026-02-24NANJING NORMAL UNIVERSITY
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Patent Information

Application Number
CN202411851026.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2026-02-24
Estimated Expiration
2044-12-16

AI Technical Summary

Technical Problem

Existing iron-sulfur based materials have problems in water treatment, such as complex preparation process, unstable storage, low iron and sulfur element concentration, easy oxidation and agglomeration, difficulty in large-scale production, and secondary pollution, which affect their application effect and environmental adaptability.

Method used

A stable reducing iron-sulfur-based slurry was prepared by combining organic matter with a coagulant. The organic matter complexes with ferrous ions, enhancing the dispersibility and antioxidant properties of FeS. The organic matter and flocculant encapsulate FeS particles to form a stable suspension, thereby improving its application effect in water treatment.

Benefits of technology

It achieves long-term stability and efficient dispersibility of iron-sulfur based slurry, improves the removal rate of heavy metals in water, avoids secondary pollution, simplifies the preparation process, and is suitable for large-scale application.

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Abstract

The application discloses a kind of stabilized reducing iron sulfur-based slurry and its preparation method and application, the slurry is organic matter-coagulant-ferrous sulfide nanoparticle suspension, including the following components by mass percentage concentration: the slurry includes the following components by mass percentage concentration: organic matter: 0.5-5%, coagulant: 1-10%, ferrous sulfide nanoparticles: balance.It is prepared as follows: organic matter solution is mixed with ferrous sulfate solution and stirred, then mixed with coagulant solution and stirred, then slowly drop sodium sulfide solution, stirring, so that nano ferrous sulfide particles are formed in mixed solution, then centrifuged, and the supernatant is discarded to obtain the slurry.The slurry of the application can be prepared in a short process and at a low cost, can efficiently and quickly treat hexavalent chromium contaminated water, can be stored at normal temperature and pressure for at least one month without deterioration, has a small dosage, the precipitate after treatment is stable, avoids secondary pollution, and has potential application value.
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