Chitosan-calcium carbonate composite adsorbent for adsorption, and preparation method thereof

The invention discloses a chitosan-calcium carbonate composite adsorbent for adsorption, and a preparation method thereof, belonging to the field of modification of organic materials. The chitosan-calcium carbonate composite adsorbent contains chitosan and nanometer calcium carbonate. The preparation method comprises the following steps: dissolving chitosan in an acetic acid solution; adding nanometer calcium carbonate; adding calcium chloride; taking a container, and coating the inner wall of the container with chitosan; transferring a mixture obtained in the previous steps into the container; adding a solution containing OH and CO3; and conducting sealing and standing, and cleaning, drying and grinding a precipitate to obtain a finished product. The method has the advantages of mild experiment conditions, simple operation, simple and convenient reaction post-treatment, and no generation of any by-product; and the finished product prepared by the method can quickly absorb Cuions in wastewater in a