Novel tannin cured chitosan heavy metal ion dynamic absorption device and preparation method thereof

Abstract

The invention particularly relates to a novel tannin cured chitosan heavy metal ion dynamic absorption device and a preparation method thereof. The device comprises a casing (1), wherein two ends of the casing (1) are respectively provided with an inlet (2) and an outlet (3), the inner part of the casing (1) is filled with a novel tannin cured chitosan heavy metal ion absorbing agent (4) from bottom to top, and the inlet (2) and the outlet (3) of the casing (1) are respectively closed and provided with permeable materials (5 and 6). The preparation method of the device comprises the steps of: weighting the prepared novel tannin cured chitosan heavy metal ion dynamic absorbing agent, and loading into an inner cavity of the inner part of the casing (1) from bottom to top; filling up and making the novel tannin cured chitosan heavy metal ion dynamic absorbing agent even, tamping to ensure that the novel tannin cured chitosan heavy metal ion dynamic absorbing agent is loosened uniformly; and respectively closing the inlet (2) and the outlet (3) of the casing (1) by using the permeable materials (5 and 6). The device can be circularly used for at least more than 200 times, has the service life of reaching at least 6 months, can be used for treating heavy metal ion sewage, enriching the trace heavy metal ions and recycling the precious heavy metal ions, and has low cost.

Description

technical field [0001] The invention relates to a novel tannic acid solidified chitosan heavy metal ion dynamic adsorption device and a preparation method thereof. Background technique [0002] Chitosan is a derivative of chitin hydrolyzed under alkaline conditions and part of the acetyl group is removed. It is also known as chitin, aminopolysaccharide, chitosan, etc., and its chemical name is β-(1→4)-2-amino - 2-deoxy-D-glucose. In nature, the annual biosynthesis of chitin is about 10 billion tons. It is the second largest organic resource on the earth except cellulose, and it is a huge treasure house of resources fully utilized by human beings. Therefore, the source of chitosan is quite abundant. The coordination between chitosan and its derivatives and metal ions is mainly due to the presence of a large number of functional groups such as hydroxyl and amino groups in the molecular chain, which can form cage-like molecules with a similar network structure by means of hyd...

AI Technical Summary

Problems solved by technology

One of the existing problems is that the number of cycles of the adsorbent is low, and the cost of the adsorbent is expensive; the second is that all research on adsorption and desorption studies is done under static conditions, and there is a lack of dynamic adsorption research.

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