Preparation method and application of modified iron-based starch flocculant

By combining the preparation of modified iron-based starch flocculants with electron beam irradiation technology, the problem of low organic matter removal rate in coal chemical tailings water was solved, achieving a highly efficient pollutant removal effect.

CN119100506BActive Publication Date: 2026-07-10CGN DASHENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CGN DASHENG TECH CO LTD
Filing Date
2024-10-25
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing coal chemical wastewater treatment, conventional flocculants do not achieve satisfactory electron transfer rates under electron beam irradiation, making it difficult to effectively remove pollutants, especially high concentrations of recalcitrant organic matter.

Method used

A modified iron-based starch flocculant was prepared by mixing ferrous salt, molybdenum source compound, gadolinium source compound and modified grafted sodium polypropylene thickener to form an Fe/Mo/Gd composite flocculant for the treatment of biochemical wastewater from coal chemical industry. Combined with electron beam irradiation technology, the rates of oxidation, hydrolysis and polymerization reactions were coordinated.

Benefits of technology

It improves the removal efficiency of organic matter in coal chemical tailings by breaking chemical bonds through the generation of free radicals and activated groups, thereby decomposing organic matter and ultimately significantly reducing COD content.

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Abstract

The application provides a preparation method of a modified iron-based starch flocculant. The Fe / Mo / Gd composite flocculant is synthesized through material modification and is used for treating coal chemical biochemical effluent. After starch graft modification, the Fe / Mo / Gd composite flocculant can effectively improve the adsorption bridging and net trapping capacity. In the process of electron beam irradiation, the flocculant is hydrolyzed, ionization or excitation is generated between the electron beam and the hydrolyzed polymer, orbital electrons are released, free radicals are formed and the original molecular structure is changed. The free radicals or other activated groups can form new molecular forms, which can destroy chemical bonds and generate new chemical reactions, decompose organic matters and finally remove organic matters in the coal chemical tail water.
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