Calcium alginate composite modified biochar gel ball and preparation process and application thereof

By preparing magnetically modified biochar and calcium alginate composite gel spheres, the problems of low adsorption efficiency and difficult recycling in water microplastic treatment were solved, achieving efficient, low-cost, and recyclable microplastic treatment results.

CN122298372APending Publication Date: 2026-06-30GUILIN UNIV OF TECH AT NANNING
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
GUILIN UNIV OF TECH AT NANNING
Filing Date
2026-05-26
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing water microplastic treatment technologies suffer from insufficient adsorption efficiency, difficulty in material recycling, poor environmental adaptability, high cost, and the risk of secondary pollution. Traditional powdered biochar has low adsorption efficiency in dynamic water flow environments and is difficult to collect in a concentrated manner.

Method used

Using sugarcane bagasse as raw material, magnetically modified biochar is prepared by co-pyrolysis of hematite and zinc chloride. This modified biochar is then combined with sodium alginate and carrageenan to form calcium alginate-modified biochar gel spheres. These spheres possess high specific surface area, hierarchical pore structure, and magnetic response properties, enabling convenient recycling and efficient adsorption of the material.

Benefits of technology

It improves the adsorption efficiency of microplastics, reduces the difficulty of recycling, and uses green, low-cost, and biodegradable materials. It is suitable for a variety of microplastic treatment scenarios, with an adsorption efficiency of 96% to 99%, and can be recycled.

โœฆ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122298372A_ABST
    Figure CN122298372A_ABST
Patent Text Reader

Abstract

This invention relates to the field of microplastic adsorbent materials technology, specifically to a calcium alginate composite modified biochar gel ball, its preparation process, and its application. The process includes the following steps: Sugarcane bagasse powder is mixed with iron salt and an activator in a specific ratio and stirred thoroughly. The mixture is placed in a tube furnace, and a nitrogen protective atmosphere is introduced. The furnace is then heated for pyrolysis, and cooled to room temperature under nitrogen protection. The solid product is removed, washed, filtered, dried, and sieved to obtain magnetically modified biochar. Sodium alginate and carrageenan are added to deionized water and stirred until fully dissolved to form a homogeneous colloidal solution. Magnetically modified biochar is added, and the solution is ultrasonically dispersed and stirred to obtain a mixed colloid. The mixed colloid is then added dropwise to a CaCl2 solution for cross-linking and curing. The gel balls are removed and washed with deionized water to obtain calcium alginate composite modified biochar gel balls.
Need to check novelty before this filing date? Find Prior Art