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Crosslinked chitosan-biochar microsphere adsorbing material and preparation method thereof

A cross-linked chitosan and microsphere adsorption technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, water pollutants, etc. secondary pollution and other problems, to achieve significant beneficial effects, suitable for application and promotion, and developed pore structure.

Pending Publication Date: 2019-02-22
SHANDONG ANALYSIS & TEST CENT
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Most of the reported applications of biochar in pollutant removal are carried out in suspension systems, which may cause secondary pollution problems due to the difficulty in separating biochar from the purification solution.
This issue limits the full application of biochar in water treatment

Method used

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  • Crosslinked chitosan-biochar microsphere adsorbing material and preparation method thereof
  • Crosslinked chitosan-biochar microsphere adsorbing material and preparation method thereof
  • Crosslinked chitosan-biochar microsphere adsorbing material and preparation method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] The cross-linked chitosan-bio-char microsphere of the present invention is made up of chitosan, bio-char powder and cross-linking agent, chitosan and bio-char powder are evenly mixed, for chitosan, add bio-char and cross-link The biochar enhances the mechanical properties of chitosan, and the cross-linking agent enhances the acid resistance of chitosan, which is beneficial to the recovery of biochar to avoid secondary pollution. The mass ratio of chitosan to biochar powder is preferably 1:0.3-0.8, and the biochar powder is prepared from biological straw, such as reed straw. The cross-linking agent can be selected glutaraldehyde. The preparation principle of the cross-linked chitosan-biochar microspheres of the present invention is as follows: add chitosan into dilute acid solution, stir to form a sol; then add biochar powder, stir to form a mixe...

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Abstract

The invention discloses a crosslinked chitosan-biochar microsphere adsorbing material. The material is prepared from chitosan, biochar powder and a crosslinking agent, and chitosan and the biochar powder are uniformly mixed. A preparation method of the material comprises the steps as follows: firstly, adding chitosan to a diluted acid solution and performing stirring to form sol; then, adding thebiochar powder to the sol and performing stirring to form mixed sol; next, dropping the mixed sol in an alkaline solution to form microspheres; after washing the microspheres to be neutral, soaking the microspheres in a crosslinking agent, and washing the microspheres with deionized water to be neutral after soaking. According to the crosslinked chitosan-biochar microsphere adsorbing material andthe preparation method thereof, the prepared crosslinked chitosan-biochar microspheres have the characteristics of advanced, rough and complex pore structures, have larger specific surface area, havegood adsorption capacity for heavy metal ions and organic dyes in water and can be completely recovered after use, and the secondary pollution problem due to the fact that chitosan and biochar are difficult to recover completely when adsorbed in the form of powder is solved.

Description

technical field [0001] The invention relates to a cross-linked chitosan-biochar microsphere adsorption material and a preparation method thereof, in particular to a cross-linked shell which can be used to adsorb pollutants such as heavy metals and organic dyes in water bodies Polysaccharide-biochar microsphere adsorption material and preparation method thereof. Background technique [0002] Due to the rapid development of industrialization and the serious exploitation of natural resources, water pollution has become one of the biggest threats to the protection of the environment. If the content of pollutants in the water body exceeds the environmental carrying limit, the self-purification ability of the environment will be weakened, thereby destroying the balance of the aquatic ecosystem and posing a huge threat to human health. Heavy metal wastewater mainly comes from industrial and mining enterprises. It is non-biodegradable and can enter the human body through the food c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28C02F101/22
CPCB01J20/20B01J20/24B01J20/267B01J20/28021C02F1/285C02F2101/22
Inventor 陈庆锋郭贝贝杨朝
Owner SHANDONG ANALYSIS & TEST CENT
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