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Preparation method and application of heavy-metal removing agent for temporary shellfish cultivation

A heavy metal and remover technology, which is applied in application, fish farming, climate change adaptation, etc., can solve the problems of poor heavy metal removal effect and inapplicable heavy metal removal, and achieve simple use method, ensure food safety, The effect of simple preparation process

Inactive Publication Date: 2015-11-11
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the removal effect of heavy metals by the clean water storage method is not good and is not applicable to the removal of all heavy metals, possibly due to the different enrichment sites and chemical principles in shellfish

Method used

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  • Preparation method and application of heavy-metal removing agent for temporary shellfish cultivation
  • Preparation method and application of heavy-metal removing agent for temporary shellfish cultivation
  • Preparation method and application of heavy-metal removing agent for temporary shellfish cultivation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: preparation of heavy metal removal agent for temporary cultivation of shellfish

[0020] Get carrageenan oligosaccharide (polymerization degree is 3) and put into phosphate buffer, the volume ratio of phosphate buffer addition and carrageenan oligosaccharide is 40:1, the concentration of phosphate buffer is 0.25mol / L, pH value is 5.5. After the carrageenan oligosaccharide is fully dissolved, then add sodium selenite, the mass ratio of carrageenan oligosaccharide to sodium selenite is 5:1, adjust the pH value of the solution to neutral, and shake and react at room temperature for 2 hours. After the reaction, 3 times the volume of ethanol was added to the reaction solution, alcohol precipitation overnight, vacuum filtration and freeze-drying to obtain the phosphorylated carrageenan oligosaccharide-selenium complex.

[0021] Mix the phosphorylated carrageenan oligosaccharide-selenium complex prepared above, EDTA-sodium iron, EDTA-sodium zinc, β-glucan and Vc...

Embodiment 2

[0022] Embodiment 2: preparation of heavy metal removal agent for temporary cultivation of shellfish

[0023] Get carrageenan oligosaccharide (polymerization degree is 6) and put into phosphate buffer, the volume ratio of carrageenan oligosaccharide adding amount of carrageenan oligosaccharide buffer is 50:1, the concentration of phosphate buffer is 0.1mol / L, pH value is 6.5. After the carrageenan oligosaccharides were fully dissolved, sodium selenite was added, the mass ratio of carrageenan oligosaccharides to sodium selenite was 6:1, the pH value of the solution was adjusted to neutral, and the reaction was shaken at room temperature for 3 hours. After the reaction, 5 times the volume of ethanol was added to the reaction solution, alcohol precipitation overnight, vacuum filtration and freeze-drying to obtain the phosphorylated carrageenan oligosaccharide-selenium complex.

[0024] Mix the phosphorylated carrageenan oligosaccharide-selenium complex prepared above, EDTA-sodiu...

Embodiment 3

[0025] Embodiment 3: preparation of heavy metal removal agent for temporary cultivation of shellfish

[0026] Get carrageenan oligosaccharide (polymerization degree is 9) and put into phosphate buffer, the volume ratio of phosphate buffer addition and carrageenan oligosaccharide is 60:1, the concentration of phosphate buffer is 0.18mol / L, pH value for 6. After the carrageenan oligosaccharide is fully dissolved, then add sodium selenite, the mass ratio of carrageenan oligosaccharide to sodium selenite is 7:1, adjust the pH value of the solution to neutral, and shake and react at room temperature for 4 hours. After the reaction, 5 times the volume of ethanol was added to the reaction solution, alcohol precipitation overnight, vacuum filtration and freeze-drying to obtain the phosphorylated carrageenan oligosaccharide-selenium complex.

[0027] Mix the phosphorylated carrageenan oligosaccharide-selenium complex prepared above, EDTA-sodium iron, EDTA-sodium zinc, β-glucan and Vc ...

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Abstract

The invention relates to a preparation method of a heavy-metal removing agent for temporary shellfish cultivation. The preparation method comprises the following steps that carrageenan oligosaccharide is taken and added into a phosphoric acid buffer solution to be fully dissolved, then sodium selenite is added, the mass ratio of the carrageenan oligosaccharide to the sodium selenite is 5-7:1, the pH value of the solution is regulated to be neutral, and oscillatory reaction is performed at normal temperature for 2 to 4 hours; 3-5 times by volume of ethanol is added after reaction, the ethanol precipitates overnight, and a phosphorylated carrageenan oligosaccharide-selenium element complex is obtained through reduced-pressure suction filtration and freeze drying, and the prepared phosphorylated carrageenan oligosaccharide-selenium element complex, EDTA-sodium iron, EDTA-sodium zinc, beta-glucan and Vc are mixed according to the mass ratio of 16-48:50-70:50-70:10-12:15-35 to obtain the required heavy-metal removing agent for temporary shellfish cultivation. The invention further relates to application of the heavy-metal removing agent prepared by means of the method in temporary shellfish cultivation. The method is low in cost and simple in preparation process, and the removing agent prepared by means of the method is simple in using method and can remarkably remove heavy-metal elements rich in shellfish bodies and ensure the edible safety of people.

Description

technical field [0001] The invention relates to a heavy metal remover, in particular to a preparation method and application of a heavy metal remover for temporary cultivation of shellfish. Background technique [0002] Shellfish belong to the clambranch class in the mollusk phylum. Generally, there are 1 to 2 shells on the outside of the body. The common ones are oysters, mussels, clams, and razor clams. Shellfish are filter-feeding organisms with poor mobility, and most of the breeding bases are in heavily polluted sea areas. Therefore, when they filter-feed bait, they also enrich heavy metals and chemical pollutants in seawater. Studies have shown that from the perspective of single pollution index and pollutant load ratio, cadmium (Cd) has the greatest impact on bivalve molluscs. The average content of Cd in seawater is 0.11ug / L, and fish can enrich 10 3 ~10 5 times, shellfish can be enriched by 10 5 ~10 6 times; shellfish content in polluted areas can be as high as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A23K1/18A23K1/175A23K1/16
CPCY02A40/81
Inventor 张宾房传栋史周荣邓尚贵
Owner ZHEJIANG OCEAN UNIV
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