Preparation method for jointly modifying biochar by utilizing ferric chloride and calcium chloride and method for enhancing phosphate adsorption
By modifying biochar with ferric chloride and calcium chloride, the problem of insufficient adsorption capacity of primitive biochar with phosphate is solved, the adsorption efficiency is significantly improved, and it has good eutrophication and repair effect of water body.
CN119746816AActive Publication Date: 2025-04-04CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Patent Information
- Application Number
- CN202411951152.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2044-12-27
AI Technical Summary
Technical Problem
The adsorption capacity of primitive biochar is limited to phosphate, making it difficult to effectively remove phosphate from water bodies, resulting in the problem of eutrophication of water bodies.
Method used
By mixing and impregnating the original biochar with ferric chloride and calcium chloride solutions, a biochar with ferric chloride combined modified calcium chloride is formed, which improves its adsorption performance on phosphate.
Benefits of technology
The modified biochar significantly improves the adsorption capacity and removal efficiency of PO43-, can achieve an adsorption efficiency of more than 80% at room temperature, and efficiently remove phosphate from water under conditions of more than 96%.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses ferric chloride and calcium chloride combined modified biochar, a preparation method thereof and a method for enhancing phosphate adsorption, and the preparation method comprises the following steps: (1) mixing and dipping original biochar with a ferric chloride and calcium chloride solution, and fully shaking and shaking up the mixed solution; (2) carrying out suction filtration on the mixed solution to remove supernate, and drying residual solid substances to obtain a modified biochar material; and (3) putting the modified biochar material into a tubular furnace, continuously introducing nitrogen into the tubular furnace, carrying out high-temperature carbonization at 600 + / -5 DEG C for 2 + / -0.1 h, cooling the tubular furnace to room temperature, taking out, cleaning, and drying to obtain the biochar jointly modified by ferric chloride and calcium chloride. Adsorption active sites of the biochar can be increased after joint modification of ferric chloride and calcium chloride, the specific surface area of the biochar is increased, the structure of the biochar is looser, and the adsorption effect is enhanced.
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