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Feeding bait for shellfish and method for removing heavy metals from the shellfish

A technology for heavy metals and shellfish, applied in the field of heavy metal removal, can solve the problems that the removal rate of heavy metals needs to be improved, achieve good removal effect, promote metabolism, and improve the ability to complex heavy metal ions

Inactive Publication Date: 2019-01-15
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal rate of cadmium and lead was only 50% after the polysaccharide complex purified shellfish for 5 days, and the removal rate of heavy metals needs to be improved.

Method used

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  • Feeding bait for shellfish and method for removing heavy metals from the shellfish

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Experimental program
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Effect test

Embodiment 1

[0031] A shellfish feeding bait, comprising: banana stalk cellulose ester, sodium alginate, fragments of mixed algae of Scenedesmus obliques, Phaeodactylum tricornutum and sea chlorella and tea polyphenols. Its preparation method comprises the following steps:

[0032] (1) Preparation of banana stalk cellulose ester: dissolve banana stalk cellulose in toluene, the solid-to-liquid ratio of banana stalk cellulose and toluene is 1g / 12mL, add maleic anhydride, the mixture of banana stalk cellulose and maleic anhydride The molar ratio is 1:3, heated to 100°C, reacted for 3 days, filtered and dried to obtain banana stalk cellulose ester;

[0033] (2) Preparation of microalgae fragments: place Scenedesmus obliques, Phaeodactylum tricornutum and seawater Chlorella with a mass ratio of 2.5:1.5:1 in clean seawater, and add a concentration of 70mg / L containing A mixed solution of Cr, Cd, Pb, Hg ions, induced 8d. Centrifuge the induced mixed algae, remove the supernatant, add water 4 ti...

Embodiment 2

[0039] A shellfish feeding bait, comprising: banana stalk cellulose ester, sodium alginate, fragments of mixed algae of Scenedesmus obliques, Phaeodactylum tricornutum and sea chlorella and tea polyphenols. Its preparation method comprises the following steps:

[0040] (1) Preparation of banana stalk cellulose ester: dissolve banana stalk cellulose in toluene, the solid-liquid ratio of banana stalk cellulose and toluene is 1g / 10mL, add maleic anhydride, the mixture of banana stalk cellulose and maleic anhydride The molar ratio is 1:2, heated to 90°C, reacted for 3 days, filtered and dried to obtain banana stalk cellulose ester;

[0041] (2) Preparation of microalgae fragments: Place Scenedesmus obliques, Phaeodactylum tricornutum and Chlorella seawater with a mass ratio of 2:1:1 in clean seawater, and add a concentration of 80mg / L containing A mixed solution of Cr, Cd, Pb, Hg ions, induced 10d. Centrifuge the induced mixed algae, remove the supernatant, add water 3 times the...

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Abstract

The present invention relates to the technical field of heavy metal removal and discloses a feeding bait for shellfish and a method for removing heavy metals from the shellfish. The feeding bait for the shellfish comprises banana stem cellulose ester, sodium alginate, microalgae fragments and tea polyphenols. The banana stem cellulose ester, sodium alginate, microalgae fragments and tea polyphenols can form a complex three-dimensional network structure. The feeding bait for the shellfish is strong in heavy metal removal ability, increases the metabolism of the shellfish and accelerates the excretion of the heavy metal ions in the shellfish. The method for removing the heavy metals in the shellfish by using the feeding bait for the shellfish is simple. After the feeding bait for the shellfish is recycled and after repeated desorption circulation, the feeding bait still maintains relatively high activity.

Description

technical field [0001] The invention relates to the technical field of heavy metal removal, in particular to a shellfish feeding bait and a method for removing heavy metals from shellfish. Background technique [0002] With the rapid development of my country's economy, the pollution of coastal waters is prominent, and the heavy metal pollution of shellfish caused by heavy metal discharge will have adverse effects on the shellfish farming industry and human health. Therefore, the research and development of heavy metal removal methods in shellfish is necessary and urgent. [0003] The Chinese patent application authorization announcement number is CN101255198B, which discloses a polysaccharide complex for removing heavy metal residues. In this invention, any one of zinc salt, magnesium salt, iron salt, calcium salt, or a mixture of four metal salts is dissolved in acetic acid solution, and after fully mixing, marine polysaccharide is added, reacted for several hours, and th...

Claims

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Application Information

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IPC IPC(8): A23K10/16A23K10/30A23K20/163A23K20/111A23K50/80A01K61/50
CPCA23K10/16A23K10/30A23K20/111A23K20/163A23K50/80A01K61/50Y02A40/81
Inventor 刘俊稚葛亚明许家辉穆军张晓玲
Owner ZHEJIANG OCEAN UNIV