Chitosan adsorption microspheres coated with magnetotactic bacteria and preparation method of chitosan adsorption microspheres

By preparing chitosan adsorption microspheres coated with magnetotactic bacteria and combining magnetic separation and chemical cross-linking techniques, the adsorption efficiency and separation problems of chitosan adsorbents were solved, achieving efficient and economical treatment of heavy metal ions.

CN121103327APending Publication Date: 2025-12-12SHANDONG ZHITAI MARINE BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511367606.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-24
Publication Date
2025-12-12

AI Technical Summary

Technical Problem

Existing chitosan adsorbents have low porosity, small specific surface area, slow internal mass transfer rate, low adsorption efficiency and rate, and are difficult to separate after adsorption, resulting in serious resource waste and high operating costs.

Method used

Chitosan adsorption microspheres coated with magnetotactic bacteria were prepared by combining chitosan with porous starch and magnetotactic bacteria, and using magnetic separation technology and chemical cross-linking to form a porous structure and a stable cross-linked structure, thereby enhancing biological stability and mechanical properties.

Benefits of technology

This improved the capacity and rate of adsorption of heavy metal ions by the microspheres, enabling rapid and effective separation and recovery, reducing operating costs, and enhancing adsorption efficiency and resource utilization.

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Abstract

The invention provides a magnetotactic bacteria coated chitosan adsorption microsphere and a preparation method thereof, the preparation method comprises the following steps: S1, dissolving chitosan in a dilute acid solution, uniformly stirring, adding porous starch, and fully dissolving to prepare a mixed solution; s2, adding a magnetotactic bacteria solution into the mixed solution, uniformly stirring, homogenizing, and spray-drying to obtain porous starch-chitosan coated magnetotactic bacteria composite microspheres; and S3, adding the composite microspheres into a glutaraldehyde solution, carrying out crosslinking, carrying out solid separation, washing with deionized water, and drying to obtain the chitosan adsorption microspheres. Chitosan is used as a parent body, a chemical adsorption method and a magnetic separation technology are combined, the chitosan adsorption microspheres coated with magnetotactic bacteria are prepared, the capacity and speed of the microspheres for adsorbing heavy metal ions in wastewater are greatly improved, the biological stability and mechanical property of the microspheres are enhanced, and the adsorption capacity of the microspheres is improved. Meanwhile, the adsorption microspheres are quickly and effectively separated from the water body.
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