一种用于环境保护的重金属土壤钝化修复方法
By coating zero-valent iron onto the surface of biomass activated carbon with FeNi@TA-AC composite material and introducing tannic acid modification to form a core-shell structure, multiple needs for heavy metal adsorption, reduction and stabilization are met, achieving efficient heavy metal soil remediation effect, and possessing stability and environmental friendliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INNER MONGOLIA NO 3 GEOLOGICAL & MINERAL EXPLORATION & DEV CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot simultaneously meet the multiple requirements of heavy metal adsorption, reduction and stabilization. Conventional biochar is prone to desorption under acidic conditions, and zero-valent iron nanoparticles are easily oxidized in soil environments and pose a risk of secondary pollution.
The FeNi@TA-AC composite material is used to coat the surface of biomass activated carbon with zero-valent iron and introduce tannic acid to form a core-shell structure. This, combined with the porous structure and functional groups, synergistically enhances the adsorption and reduction capacity of heavy metals. Furthermore, the aggregation of zero-valent iron is prevented by Ni-catalyzed electron transfer and steric hindrance.
It achieves efficient passivation of heavy metals, improves the stability and remediation effect of materials, reduces the content of available heavy metals in soil, and can be recycled and reused through magnetic separation, thus having green and environmentally friendly advantages.
Smart Images
Figure CN120362240B_ABST