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Method for purifying in vivo heavy metal of bivalve shell

A bivalve and heavy metal technology, applied in climate change adaptation, fish farming, application, etc., to achieve the effects of great economic and social significance, simple operation, and low purification cost

Inactive Publication Date: 2008-12-24
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] How to efficiently purify heavy metals in bivalve molluscs on an industrial scale has not been reported

Method used

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  • Method for purifying in vivo heavy metal of bivalve shell
  • Method for purifying in vivo heavy metal of bivalve shell
  • Method for purifying in vivo heavy metal of bivalve shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 40 lightly polluted oysters were placed in each of six plastic buckets containing 120L of sand-filtered natural seawater. The salinity of each barrel was 12, 16, 20, 24, 28, 32 (unit: ‰), and the salinity 32 was used as the control group. The experiment was carried out under natural light and room temperature (22-28° C.), the experiment period was 31 days, and the pH value of the water was adjusted to be between 7.6 and 7.9. Except for the control group where no algae was added, each experimental group was regularly fed with flat algae three to four times a day, and the concentration of flat algae in the water body was kept between 20,000 and 40,000 cells / L of water body.

[0019] At the beginning of the experiment, that is, on the 0th day, the contents of heavy metals Cu, Zn, Pb, and Cd in oysters were measured, and 6 surviving oysters were randomly selected from each experimental group on the 2nd, 5th, 10th, 15th, 23rd, and 31st day of the experiment. For oysters, th...

Embodiment 2

[0030] 40 lightly polluted oysters were placed in each of four plastic buckets containing 120L of sand-filtered natural seawater. The salinity of each barrel water body is 32, and the pH value is adjusted to between 7.6 and 7.9. The experiment was carried out under natural light and room temperature (22-28° C.), and the experiment period was 31 days. Except for one bucket used as the control group without algae feed, the other buckets were fed with chlorella, flat algae, and mixed algae (chlorella: flat algae at a ratio of 1:4) every day, and each experimental group was fed regularly every day. Feed the algae material three to four times, and keep the concentration of algae in the water between 20,000 and 40,000 cells / L of water.

[0031] At the beginning of the experiment, that is, on the 0th day, the contents of heavy metals Cu, Zn, Pb, and Cd in oysters were measured, and 6 surviving oysters were randomly selected from each experimental group on the 2nd, 5th, 10th, 15th, 2...

Embodiment 3

[0042] In a plastic bucket filled with 120L of sand-filtered natural seawater, 40 slightly polluted Philippine clams were placed. The salinity of the water body is 28, and the pH value is adjusted to be between 7.6 and 7.9. The experiment was carried out under natural light and room temperature (22-28° C.), and the experiment period was 31 days. Feed the mixed algae (chlorella: flat algae ratio of 1:4) three to four times a day, and keep the concentration of algae in the water between 20,000 and 40,000 cells / L of water.

[0043] At the beginning of the experiment, that is, on the 0th day, the contents of heavy metals Cu, Zn, Pb, and Cd in oysters were measured, and 6 surviving oysters were randomly selected from each experimental group on the 2nd, 5th, 10th, 15th, 23rd, and 31st day of the experiment. For oysters, the contents of heavy metals Cu, Zn, Pb, and Cd were determined, and the results are shown in Table 9.

[0044] Table 9 Contents of heavy metals in Philippine clam...

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Abstract

The invention discloses a method for purifying heavy metals in bivalve molluscs. The purification method is: temporarily raise the bivalve molluscs in the sand-filtered natural seawater with a water temperature of 22-28°C and a salinity of 12-32‰, and keep continuously aerated, and put live microalgae into the sand-filtered natural seawater for many times Carry out purification treatment for 2 to 31 days. By adopting the invention to purify the bivalve shellfish, the heavy metal discharge rate in the shellfish body can reach 40% to 50%, reaching the edible hygienic standard. The purification method of the invention has simple operation, low purification cost and does not affect the quality and taste of the product.

Description

technical field [0001] The invention relates to a purification method of shellfish, especially a purification method of bivalve mollusk. Background technique [0002] Bivalve mollusks such as oysters, scallops, mussels, cockles, razor clams and Philippine clams are popular seafood products and are rich in resources in my country. However, with the development of industrial and agricultural production, the pollution of the marine environment has become increasingly serious, and some aquaculture sea areas have been polluted by heavy metals such as Cu, Pb, Zn, and Cd. Oysters, scallops, mussels, cockles, razor clams and Philippine clams have bioaccumulation effects, and can accumulate very low concentrations of heavy metal ions in the body in a short period of time in the water body. Heavy metals can be passed through the food chain and pose a serious threat to human health. [0003] The Chinese invention patent application with the application number 03134147.0 discloses a b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 江天久牛涛
Owner JINAN UNIVERSITY
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