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Method for efficiently purifying heavy metals in bodies of cultured oysters

A technology for heavy metals and oysters, applied in chemical instruments and methods, testing metals, fish farming, etc., can solve problems such as unreported, and achieve the effect of low price and short cycle

Inactive Publication Date: 2017-09-05
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Asparagus, Gracilaria, Ulva and other macroalgae have been confirmed by many studies to have the ability to reduce heavy metal ions in water, but their application in the purification of heavy metals in shellfish, especially in oysters, has not been reported.
In addition, there is no report on the use of macroalgae and chitosan to purify heavy metals in shellfish, especially in oysters.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Cu for cultured Portuguese oysters 2+ take off

[0029] Time: November 2016, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0030] 100kg of 9-month-old Portuguese oysters were washed with sand-filtered seawater and placed in a 10 m 3 Put 10kg of fresh Gracilaria into the cement pool with sand-filtered seawater, and add chitosan solution at a concentration of 1mg / L to cultivate oysters for 7-14 days. time and add chitosan, inflate continuously, and take samples regularly for testing. The operation steps are:

[0031] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0032] (2) Prepare chitosan solution: weigh a certain amount of chitosan and put it into a glass container, and dissolve it with dilute acetic acid to prepare a chitosan solution with a concentration of 10g / L;

[0033] (3) Clean culture: put 10m 3 The injection volume of sand-filtered seawater is 20 m 3 The...

Embodiment 2

[0037] Example 2: Cd of cultured Portuguese oyster + take off

[0038] Time: January 2017, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0039] After washing 200kg of 12-month-old Portuguese oysters with sand-filtered seawater, they were placed in a 10-m 3 Put 50kg of fresh asparagus in the cement pond with sand filtered seawater for 7-14 days, add chitosan solution at a concentration of 10 mg / L to cultivate oysters for 7-14 days, and throw sub-heart-shaped oysters every day Algae, change the water once every 2 days and add chitosan, continuously inflate, and take samples regularly for testing. The operation steps are as follows:

[0040] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0041] (2) Prepare chitosan solution: weigh a certain amount of chitosan and put it into a glass container, and dissolve it with dilute acetic acid to prepare a chitosan solution with a concentration of ...

Embodiment 3

[0046] Example 3: Pb in cultured Portuguese oysters 2+ take off

[0047] Time: March 2017, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0048] 150 kg of 14-month-old Portuguese oysters were washed with sand-filtered seawater and placed in a 10-m 3 Put 25kg of fresh asparagus and 25kg of fresh Ulva in the cement pool with sand filtered sea water for 7-14 days, and add chitosan solution at a concentration of 5mg / L to cultivate oysters for 7-14 days, daily Throw in flat algae, change the water once every 2 days and supplement chitosan, inflate continuously, and take samples regularly for testing. The operation steps are as follows:

[0049] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0050] (2) Prepare chitosan solution: weigh a certain amount of chitosan and put it into a glass container, and dissolve it with dilute acetic acid to prepare a chitosan solution with a concentration of ...

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PUM

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Abstract

The invention relates to a method for efficiently purifying heavy metals in bodies of cultured oysters. The method comprises the steps of utilizing fresh macroalgae such as gracilaria lemaneiformis, gracilaria and ulva to be combined with chitosan and the oysters for carrying out mixed cultivation for 7-14 days, wherein the ratio of the algae to seawater is equal to (1-5)kg to 1m<3>, the ratio of the oysters to the seawater is equal to (10-20)kg to 1m<3>, and the concentration of the chitosan is 1-10mg / L; feeding the oysters with a right amount of platymonas subcordiformis, periodically replacing the seawater and supplementing the chitosan, carrying out continuous air inflation, and the like; the method can efficiently purify heavy metal ions in the bodies of the oysters; the heavy metal content of the purified oysters is significantly lower than the safety limit of first class or second class GB18421-2001 of the standard of China; the Cu<2+> purification efficiency and the Pb<2+> purification efficiency of the method are respectively 87.63-93.73% and 78.21-96.11%. The method is high in efficiency, short in period, high in practicality, environment-friendly and safe; a new method is provided for the purification of the heavy metal ions in the bodies of the oysters, and a new idea is provided for the purification of heavy metal ions in the bodies of marine shells.

Description

[0001] 【Technical field】 [0002] The invention relates to a method for purifying heavy metals in cultured oysters. Specifically, it relates to a method for purifying heavy metals in cultured oysters by using macroalgae. [0003] 【Background technique】 [0004] Oysters are the most productive marine shellfish. Oysters are called "sea oysters" in the north of my country and "oysters" in the south. Because of their delicious taste, rich in glycogen, protein, amino acids, vitamins, trace elements and other nutrients, they are known as "sea milk". Good reputation, also known as "man's gas station, woman's beauty salon". my country is a big country in oyster farming. In 2015, the output reached 4.57337 million tons, accounting for 33.67% of the total production of cultured shellfish (China Fishery Statistical Yearbook, 2016), 25% of the total production of mariculture, and more than 70% of the total production of oysters in the world. However, in recent years, the pollution prob...

Claims

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Application Information

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IPC IPC(8): A01K61/54G01N33/20C02F3/32C02F101/20
CPCA01K61/54C02F3/322C02F2101/20G01N33/20Y02A40/81
Inventor 郑怀平叶挺赵明明马庆涛林清
Owner SHANTOU UNIV
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