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A method for effectively removing cadmium from shellfish polysaccharides

A technology for removing and polysaccharide is applied in the field of effective removal of cadmium in shellfish polysaccharide by modified chitosan, removal of cadmium in health-care polysaccharide, and effective removal of cadmium in shellfish polysaccharide, achieving low cost and high adsorption efficiency. , the effect of less pollution

Inactive Publication Date: 2015-08-26
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal of cadmium in seafood by the attapulgite-chitosan method has not been reported so far, and the success of its research is of great significance to the processing of seafood

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of attapulgite-chitosan particles:

[0031] 1. Attapulgite activation

[0032] (1) Thermal activation: Take 15g of natural attapulgite and place it in a muffle furnace, heat it at 700°C for 4 hours, take it out after cooling down and put it in a dryer to dry to obtain a brick-red heat-activated attapulgite for later use;

[0033] (2) Acid activation: Take 10g of heat-activated attapulgite, add 100mL of hydrochloric acid solution with a concentration of 1moL / L to it, stir at 50°C for 2h, centrifuge at 4000r / min for 10min, discard the supernatant, and wash the precipitate with ultrapure water until Neutral; then add 100mL 10% oxalic acid solution, stir at room temperature for 3h, let stand for 4h, centrifuge at 4000r / min for 10min, discard the supernatant, wash the precipitate with ultrapure water until neutral; dry at 120°C for 4h to obtain an acid-activated orange-yellow concave soil, spare;

[0034] 2. Preparation of chitosan sol

[0035] Dissolve 2g ...

Embodiment 2

[0039] Preparation of attapulgite-chitosan particles:

[0040] 1. Attapulgite activation

[0041] (1) Thermal activation: Take 15g of natural attapulgite and put it in a muffle furnace, heat it at 600°C for 3 hours, take it out after cooling down, put it in a dryer and dry it to get brick-red heat-activated attapulgite for later use;

[0042] (2) Acid activation: Take 10g of heat-activated attapulgite, add 100mL of hydrochloric acid solution with a concentration of 1moL / L to it, stir at 40°C for 3h, centrifuge at 4000r / min for 10min, discard the supernatant, and wash the precipitate with ultrapure water until Neutral; then add 100mL 10% oxalic acid solution, stir at room temperature for 2h, let stand for 2h, centrifuge at 4000r / min for 10min, discard the supernatant, wash the precipitate with ultrapure water until neutral; dry at 100°C for 5h to obtain acid-activated orange-yellow concave soil, spare;

[0043] 2. Preparation of chitosan sol

[0044] Dissolve 2g of chitos...

Embodiment 3

[0048] Preparation of attapulgite-chitosan particles:

[0049] 1. Attapulgite activation

[0050] (1) Thermal activation: Take 15g of natural attapulgite and place it in a muffle furnace, heat it at 800°C for 5 hours, take it out after cooling down and put it in a desiccator to dry to obtain brick-red heat-activated attapulgite for later use;

[0051] (2) Acid activation: Take 10g of heat-activated attapulgite, add 100mL of hydrochloric acid solution with a concentration of 1moL / L to it, stir at 60°C for 1h, centrifuge at 4000r / min for 10min, discard the supernatant, and wash the precipitate with ultrapure water until Neutral; then add 100mL 10% oxalic acid solution, stir at room temperature for 4h, let stand for 3h, centrifuge at 4000r / min for 10min, discard the supernatant, wash the precipitate with ultrapure water until neutral; dry at 110°C for 3h to obtain an acid-activated orange-yellow concave soil, spare;

[0052] 2. Preparation of chitosan sol

[0053] Dissolve ...

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Abstract

The invention discloses a method for effectively removing cadmium from shellfish polysaccharide, which belongs to the technical field of marine product processing. The method comprises the following steps of: taking chitosan as a raw material, sequentially carrying out thermal activation and acid activating treatment on natural attapulgite to obtain the modified attapulgite, taking a chitosan sol subjected to physical modification, adding ultrapure water for diluting, and then slowly adding the modified attapulgite for carrying out primary loading; slowly adding the prepared primary loaded attapulgite to the chitosan sol undiluted, and carrying out secondary loading; and treating the compound with 1.0mol / L of sodium hydroxide solution for 1h, washing to be neutral with ultrapure water, and leaching and drying to obtain attapulgite-chitosan particles of 200 meshes, which are used for removing the cadmium from the shellfish polysaccharide. The method for removing the cadmium from the shellfish polysaccharide has high removal efficiency and little impact on the polysaccharide.

Description

technical field [0001] The invention relates to a method for removing cadmium in health-care polysaccharides, in particular to a method for effectively removing cadmium in shellfish polysaccharides, which belongs to the technical field of heavy metal deodorization of food base materials, and is an effective Method for removing cadmium from shellfish polysaccharides. Background technique [0002] Seawater pollution caused by heavy metals such as cadmium, copper, zinc, chromium and lead has become a worldwide problem. These metals are easy to accumulate in seafood organisms, causing serious food safety problems. [0003] At present, there are many studies on the removal of heavy metals by chitosan derivatives, mainly based on the -NH on the C2 position of the chitosan molecule. 2 , The -OH on the C3 and C6 positions all have strong reactivity, so some chemical modifications have been made to chitosan. In the present invention, the chitosan is physically modified, loaded on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00B01J20/24A23L1/09
Inventor 吴红棉范秀萍钟敏胡雪琼吴文龙
Owner GUANGDONG OCEAN UNIVERSITY
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