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A method for purifying cadmium in bivalve mollusk

A technology for bivalve molluscs and water bodies, which can be applied in the direction of climate change adaptation, application, and fish farming. It can solve the problems of long cycle, high consumption rate, and high cost, and achieve short operation time, low purification cost, and reduced sedimentation. Effect

Active Publication Date: 2020-10-02
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages of long cycle, high consumption rate and high cost of purification technology for cadmium residues in bivalve molluscs in the prior art, and provides an efficient, convenient and cheap method for purifying cadmium in bivalve molluscs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Cadmium purification in polluted clams:

[0026] Implementation time: July 2017, implementation location: Qingjiang base of Zhejiang Institute of Marine Aquaculture, Zhejiang University.

[0027] Take 100 cockles from cadmium-polluted seawater (the concentration of cadmium is 30 μg / L) for 30 days, clean the surface dirt of the shell of the cockles with sand-filtered seawater, place them in a plastic bucket with 30 L of water, and add Nanometer calcium carbonate suspension, magnesium sulfate aqueous solution, vitamin C and casein phosphopeptide were cultured and purified for 7 days. After 7 days of purification, 20 cockles were randomly taken out to measure the residual concentration of cadmium ions in their bodies. The specific operations are as follows:

[0028] (1) cleaning the clam: clean the surface dirt of the shell of the clam with sand filter sea water;

[0029] (2) configuration mother liquor: take by weighing nano-calcium carbonate and put into glass containe...

Embodiment 2

[0043] Cadmium Purification in Contaminated Meretrix Meretrix:

[0044] Time: September 2017, implementation location: Qingjiang Base of Zhejiang Institute of Marine Aquaculture, Zhejiang University.

[0045] Take 100 clams that have been attacked for 30 days in cadmium-polluted seawater (the concentration of cadmium is 25 μg / L), clean the surface dirt of the clam shell with sand-filtered seawater, place them in a plastic bucket with 30L sand-filtered seawater, and add Nanometer calcium carbonate suspension, magnesium sulfate aqueous solution, vitamin C and casein phosphopeptide were cultured and purified for 7 days. After 7 days of purification, 20 clams were randomly taken out, and the residual concentration of cadmium ions in their bodies was measured and compared with the clams of Comparative Example 2. The specific operations were as follows:

[0046] (1) cleaning clams: clean the surface dirt of clams shells with sand filter seawater;

[0047] (2) configuration mother ...

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Abstract

The invention relates to the technical field of purifying heavy metal in edible marine products, and discloses a method for purifying cadmium in bivalve mollusc, which comprises the following steps: adding nano calcium carbonate suspension, magnesium ion water solution, vitamin C and casein phosphopeptide into the water body cultivating the bivalve mollusc; replacing the water body every day, reading nano calcium carbonate suspension, magnesium ion water solution, vitamin C and casein phosphopeptide. According to the invention, the method is simple in operation, the purification cost is low and the operation time is short, the Cadmium ion residue in the edible bivalve bodies can be efficiently purified, and the product quality and flavor are not affected. According to the invention, when the bivalve mollusc polluted by Cadmium is treated by using the method, the removal rate of cadmium in the bivalve mollusk bodies can reach 36.5-38.4% after 7 days.

Description

technical field [0001] The invention relates to the technical field of purification of heavy metals in edible seafood, in particular to a method for purifying cadmium in bivalve molluscs. Background technique [0002] Bivalve mollusk is one of the main cultured species of mariculture in my country. Because of its rich nutrition and health care function, bivalve mollusk is deeply loved by consumers in my country. With the rapid development of industry and agriculture, heavy metal cadmium pollution in the marine environment has become increasingly serious in recent years. Since most edible and farmed bivalve molluscs mainly live in the intertidal zone or near-shore shallow sea area where marine cadmium pollution is high, they can enrich the heavy metal cadmium in the water body while filtering, and there is a high concentration of cadmium. Food safety hazards caused by exceeding the standard. Therefore, how to reduce cadmium residues in edible bivalve molluscs before sale ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/54
CPCA01K61/54Y02A40/81
Inventor 刘广绪施巍管晓帆
Owner ZHEJIANG UNIV
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