A composite material of biochar loaded nano-iron oxide and a preparation method and application thereof

By preparing a composite material of biochar-supported nano-iron oxide, the problems of secondary pollution and instability in biochar modification methods were solved, achieving efficient adsorption and selective removal of heavy metal ions, reducing costs and improving material stability.

CN122399747APending Publication Date: 2026-07-17LULIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LULIANG UNIV
Filing Date
2026-05-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing biochar modification methods suffer from problems such as secondary pollution, unstable doping, difficulty in control, high energy consumption, and high equipment requirements, resulting in poor adsorption capacity and selectivity for heavy metal ions.

Method used

Biochar was prepared using waste biomass materials, and nano-iron oxide was loaded onto it via co-precipitation. The pyrolysis and activation steps were controlled to improve porosity and specific surface area, forming Fe-OC chemical bonds to stabilize the loaded nano-iron oxide.

Benefits of technology

This improved the adsorption capacity and selectivity of biochar for heavy metal ions, reduced preparation costs, avoided secondary pollution, and enhanced the stability and recyclability of the material.

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Abstract

本发明公开了一种生物炭负载纳米氧化铁的复合材料及制备方法和应用，属于去除水中重金属的复合材料的技术领域，其技术方案要点是一种生物炭负载纳米氧化铁的复合材料的制备方法，包括如下步骤：S1、生物炭的制备：S1.1、将废弃生物质材料预处理后粉碎得到生物质粉末；S1.2、将生物质粉末进行热解得到生物炭；S1.3、将生物炭活化获得活化生物炭；S2、生物炭负载纳米氧化铁的制备：在铁盐溶液中加入活化生物炭，通过采用共沉淀法制得生物炭负载纳米氧化铁的复合材料，利用废弃生物质材料制备的生物炭，负载纳米氧化铁后，提高生物炭对重金属离子的吸附能力和选择性。
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