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Method for using living seaweed to repair seawater nuclide strontium pollution

A seawater and living technology, applied in the field of remediation of nuclide pollution, can solve problems such as coastal water pollution, and achieve the effects of fast adsorption, low cost and high efficiency

Inactive Publication Date: 2018-10-16
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strontium-90, cesium-137, and cobalt-60 are relatively common nuclide pollutants, even at low concentrations, they will cause serious pollution problems in coastal waters

Method used

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  • Method for using living seaweed to repair seawater nuclide strontium pollution
  • Method for using living seaweed to repair seawater nuclide strontium pollution
  • Method for using living seaweed to repair seawater nuclide strontium pollution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Detection and comparison of the ability of kelp and copper algae to enrich strontium under equilibrium state

[0025] Take kelp and copper algae seedlings with a length of about 10cm in a 1L beaker and place them at a temperature of 15°C and a light intensity of 40μmolphotons m -2 the s -1 , photoperiod 12h (L): 12h (D) in the incubator aerated culture; Fill in the beaker of the natural seawater that contains the strontium of different concentrations in the incubator, each group of experiments is set up 3 parallels, cultivate 7 days and take out appropriate amount of kelp and Copper algae sample, the content of strontium in the algal body under different conditions is detected through ICP-OES (see figure 1 );

[0026] Wherein, the final concentrations of strontium in seawater containing different concentrations of strontium are set to 7.4, 13.4 and 19.4mg / L, and the concentration of strontium in the natural seawater is 7.4mg / L.

[0027] See the test results figure 1...

Embodiment 2

[0028] Embodiment 2 Sea-tangle removes the water tank simulation experiment of strontium ion

[0029] Add live kelp with a fresh weight of about 2.5kg in a 90L glass tank, and inflate it for cultivation. The final concentration of strontium in seawater is set to 24mg / L. Samples of algae and seawater are taken every 2h, and the content of strontium is detected respectively (see figure 2 with 3 ).

[0030] Depend on figure 2 with 3 The results showed that under artificial simulation conditions, the repair process of kelp to seawater nuclide strontium was basically completed in about 12 hours, after which the algae could be considered to be recycled, and fresh kelp could be added again until the strontium in seawater was completely removed.

[0031] At the same time, according to the above method, the content and enrichment factors (bioconcentration factors, BCFs) of strontium in other common and large biomass seaweeds in my country's coastal areas were compared, and it was ...

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Abstract

The invention relates to a technology for repairing nuclide pollution, in particular to a method for using living seaweed to repair seawater nuclide strontium pollution. According to the method, living Saccharina japonica or Sargassum horneri are used to repair the pollution of nuclide strontium in seawater. The method has the advantages of good adsorption effect, low cost and simple and convenient operation, and laying an important foundation for in situ bioremediation of near-shore radionuclide-contaminated sea areas.

Description

technical field [0001] The invention relates to a technique for remediating nuclide pollution, in particular to a method for remediating seawater nuclide strontium pollution by using living algae. Background technique [0002] In recent years, with the continuous development of nuclear technology, the number of coastal nuclear power plants has increased significantly, and radionuclide pollution has become an increasingly serious problem that needs to be solved urgently. Strontium-90, cesium-137, and cobalt-60 are relatively common nuclide pollutants. Even at low concentrations, they can cause serious pollution problems in coastal waters. [0003] Algae have attracted extensive attention because of their high enrichment ability for metal elements and their application potential as pollution indicators and nuclide scavengers. Compared with physical adsorbents, living seaweed not only has stronger metal adsorption capacity, but also can survive and even grow in polluted waters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12
CPCG21F9/12
Inventor 王雪妹单体锋逄少军
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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