Industrial solid waste treatment method, cementing material and workpiece

Through the mixing treatment of nitrogen-doped biochar and industrial solid waste, heavy metal ions are fixed and gelled materials with high mechanical strength are prepared, which solves the problem of heavy metal ions dissolution in industrial solid waste recycling and utilization, and realizes environmental protection and building material performance promote.

CN119241105AActive Publication Date: 2025-01-03SHENZHEN UNIV
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Patent Information

Application Number
CN202411379928.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-29
Publication Date
2025-01-03
Estimated Expiration
2044-09-29

AI Technical Summary

Technical Problem

The prior art is difficult to effectively recycle industrial solid waste containing heavy metal ions, and these heavy metal ions are easily dissolved after recycling, pollute the environment and affect the strength of building materials.

Method used

Using nitrogen-doped biochar and industrial solid waste to mix, heavy metal ions are fixed through adsorption and complexation of nitrogen-doped biochar to form a precursor of gelling material, and further prepare gelling with high mechanical strength and carbon solid properties. Material.

Benefits of technology

It realizes effective fixation and recycling of heavy metal ions, reduces environmental pollution, improves the mechanical properties of building materials, and gives gelling materials the carbon sequestration effect of adsorbing carbon dioxide.

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Abstract

The invention relates to the technical field of resources and environments, in particular to an industrial solid waste treatment method, a cementing material and a workpiece. The industrial solid waste treatment method comprises the following steps: providing nitrogen-doped biochar, wherein at least the surface of the nitrogen-doped biochar is combined with a nitrogen-containing group; industrial solid waste is provided, wherein the industrial solid waste contains heavy metal ions; the nitrogen-doped biochar and industrial solid waste are subjected to first mixing treatment, a gel material precursor is obtained, the gel material precursor can be further prepared into a gel material, and a workpiece is prepared. Heavy metal ions can be adsorbed and fixed by the nitrogen-doped biochar and are not easy to dissolve out to harm the environment, after adsorption, the mechanical property of a workpiece prepared from the cementing material is also improved, and meanwhile, the cementing material is endowed with a carbon sequestration effect. By means of the treatment method, the industrial solid waste containing the heavy metal ions can be recycled, the treatment method is controllable in process, and the prepared cementing material is excellent in performance.
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Citation Information

Patent Citations

  • Sodium silicate alkali activated slag concrete recycling method

    CN104386991A

  • Nitrogen-doped hierarchical pore biochar prepared by pyrolysis of wet biomass and application of nitrogen-doped hierarchical pore biochar

    CN115043401A

  • Preparation method of in-situ nitrogen-doped caragana microphylla porous biochar material

    CN116440868A

  • Biochar-based geopolymer and application thereof

    CN117843262A

  • Cementitious biochar compositions and methods of making the same

    US20220298073A1

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