Preparation of Magnetic Chitosan Nanoparticles and Its Method for Treating Heavy Metal Wastewater

A technology of chitosan nano and chitosan acetic acid, which is applied in the fields of alkali metal compounds, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of weak chemical resistance, mechanical strength, limitations, etc., and achieve simple preparation methods , low cost, small footprint
CN102258981AInactive Publication Date: 2011-11-30TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2011-11-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for preparing magnetic chitosan nano particles and processing heavy metal wastewater, belonging to the technical field of material preparation. The method disclosed by the invention comprises the following steps: firstly, weighing ferrous salt and ferric salt as raw materials for preparing a magnetic material, wherein the raw materials are dispersed in a chitosan acetic acid solution after being dissolved; and dropping the mixed liquor into alkali liquor through an injector to obtain the magnetic chitosan particles, wherein the prepared magnetic chitosan particles are provided with a chitosan-nano ferroferric oxide core shell structure and a nano biological absorption material with excellent absorption performance. The method disclosed by the invention is simple and easy to operate. The nano biological absorption material prepared by the method disclosed by the invention is used for processing the heavy metal wastewater.
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Description

technical field

[0001] The invention belongs to the technical field of material preparation, and in particular relates to the preparation of magnetic chitosan nanoparticles and a method for treating heavy metal wastewater. Background technique

[0002] Chitosan is one of the natural polymer materials with excellent properties. Chitin, the precursor of chitosan, widely exists in crustaceans such as shrimp and crab, and is the second largest natural polymer compound after cellulose in the world. Chitosan is the deacetylation product of chitin, and its molecular chain contains active groups -NH 2 With -OH, it has good complexation and can complex heavy metal ions in water.

[0003] However, chitosan also has deficiencies in practical applications. Firstly, weak chemical resistance and mechanical strength limit the application of chitosan gel nanoparticles. Secondly, it is difficult to remove pollutants effectively and quickly after adsorption and removal. Separation from wate...

Claims

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