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Method for preparing composite shellfish toxin adsorbent by coating porous shell particles with chitosan

A technology of shell particles and shellfish toxins, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of unavailable aquatic raw materials, high use costs, and high prices, and reduce preparation costs and use The effect of cost, strong absorption capacity, and large specific surface area

Active Publication Date: 2016-08-24
QINGDAO UNIV OF SCI & TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to remove shellfish toxins in polluted aquatic products, and solve the problem that aquatic raw materials with excessive shellfish toxins cannot be used, pollute the environment after being discarded, and cause economic losses, while chitosan and its derivative microspheres established in the early stage In the removal method, because chitosan and its derivatives are more expensive, the problem of high cost of use also restricts the application. The present invention first adopts shells as raw materials, through dilute pickling, washing, drying, electric furnace burning, and after 500 Calcined at ~800°C, crushed and sieved to obtain shell particles with a large number of micropores, then dissolved chitosan in 1% glacial acetic acid solution to prepare a certain concentration of chitosan solution, and mixed with shell particles according to a certain material Liquid ratio mixing, soaking for a certain period of time, removing and draining, and vacuum drying to prepare a composite adsorbent, which is used for the detoxification of poisoned aquatic raw material slurry. , which reduces the cost of use

Method used

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  • Method for preparing composite shellfish toxin adsorbent by coating porous shell particles with chitosan

Examples

Experimental program
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Embodiment 1

[0023] Weigh the oyster shell, wash the surface with 0.5% dilute hydrochloric acid, rinse it with clean water, dry it with hot air at 100°C, burn it on an electric furnace for 30 minutes, then place it in a muffle furnace at 600°C for 2 hours, cool it, crush it, and pass it for 20 minutes. Mesh sieve to prepare shell particles. Weigh chitosan, dissolve in 1% glacial acetic acid solution, prepare 1% chitosan solution, mix shell particles with chitosan solution according to the ratio of material to liquid 1:5, stir well, soak for 60min, and separate the shells Granules, drain the solution, vacuum degree ≤ 0.10MPa, vacuum drying at 60°C for 4 hours, to obtain a composite adsorbent. Shell the scallops contaminated with paralytic shellfish toxin and take the meat, add 3 times the volume of water, make a pulp, pass through a 200-mesh sieve, put it in a hot and cold cylinder with stirring, add 0.05% of the slurry mass Composite adsorbent, room temperature Adsorption treatment was ca...

Embodiment 2

[0025] Weigh the scallop shell, wash the surface with 0.2% dilute sulfuric acid by volume, rinse it with clean water, dry it with hot air at 80°C, burn it on an electric furnace for 20 minutes, and then calcinate it in a muffle furnace at 700°C for 2 hours. After cooling, crush it. Pass through a 20-mesh sieve to prepare shell particles. Weigh chitosan, dissolve in 1% glacial acetic acid solution, prepare 1.5% chitosan solution, mix shell particles with chitosan solution according to the ratio of material to liquid 1:3, stir well, soak for 40min, and separate shells Granules, drain the solution, vacuum degree ≤ 0.10MPa, vacuum drying at 65°C for 3 hours, to obtain a composite adsorbent. Shell the scallops polluted with paralytic shellfish toxin, add 4 times the volume of water, make a pulp, pass through a 200-mesh sieve, place in a hot and cold cylinder with stirring, add 0.1% of the slurry mass Composite adsorbent, room temperature Adsorption treatment was carried out under ...

Embodiment 3

[0027] Weigh the clam shell, wash the surface with 0.3% dilute acetic acid, rinse it with clean water, dry it with hot air at 70°C, burn it on an electric furnace for 60 minutes, then place it in a muffle furnace at 600°C for 3 hours, cool it, crush it, and pass it for 20 minutes. Mesh sieve to prepare shell particles. Weigh chitosan, dissolve it in 1% glacial acetic acid solution, prepare 3% chitosan solution, mix shell particles with chitosan solution according to the ratio of solid to liquid 1:10, stir evenly, soak for 90min, and separate the shells Granules, drain the solution, vacuum degree ≤ 0.10MPa, vacuum drying at 70°C for 6 hours, to obtain a composite adsorbent. Shell the scallops contaminated with paralytic shellfish toxin, add 5 times the volume of water, make a slurry, pass through a 200-mesh sieve, place in a hot and cold cylinder with stirring, add 0.07% of the slurry mass Composite adsorbent, room temperature Adsorption treatment was carried out under stirrin...

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Abstract

The invention discloses a method for preparing a composite shellfish toxin adsorbent by coating porous shell particles with chitosan. The method comprises the steps of conducting diluted acid washing and water washing on shells (fan shells, oyster shells, clam shell and the like) with shellfish meat removed to remove dirt on the surfaces of the shells, conducting stoving, electric furnace firing, high-temperature calcination, smashing and screening to obtain shell particles, soaking the shell particles in chitosan / acetic acid solution with certain concentration, and conducting draining and vacuum drying to obtain the composite adsorbent with chitosan coatings formed on the inner bore walls of the shell particles and on the surfaces of the particles. The invention further discloses a method for adsorbing shellfish toxins in aquatic products by means of the composite adsorbent and a method for regeneration of the composite adsorbent. By the adoption of the method for adsorbing shellfish toxins in aquatic products by means of the composite adsorbent, shellfish toxins can be removed efficiently, so that polluted aquatic products can be utilized and environment pollution can be reduced.

Description

technical field [0001] The invention belongs to the technical field of preparing shellfish toxin biosorbents for ensuring the safety of aquatic products, and in particular relates to a method for preparing a composite shellfish toxin adsorbent by coating porous shell particles with chitosan and removing shellfish from aquatic raw materials Regeneration of toxins and composite adsorbents. Background technique [0002] Shellfish toxins (STs) are mostly produced by marine red tide algae. Filter-feeding shellfish, some fish and other aquatic animals consume toxic algae, so that the toxins accumulate in their bodies, and then pass through the food chain. serious harm to the industry and human health. Every year around the world, huge economic losses are caused by the ban on fishing of poisoned seafood (shellfish, shrimp, etc.) and the investment in monitoring and early warning, and the poisoning deaths caused by it pose a serious threat to public safety and human health. [000...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J20/34
CPCB01J20/0277B01J20/24B01J20/3475B01J2220/4881B01J2220/46
Inventor 解万翠杨锡洪
Owner QINGDAO UNIV OF SCI & TECH
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