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Method for repairing rare earth pollution by using coupling between suaeda glauca and immobilized microbial agent

A microbial agent and rare earth pollution technology, applied in the field of remediation of rare earth contaminated soil, can solve the problems of large impact and restrictions on the living and growth environment of microorganisms, achieve superior growth space, low production cost, and prevent soil moisture from evaporating

Inactive Publication Date: 2014-09-10
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an emerging repair method, microorganisms are characterized by low cost and environmental friendliness, but the survival and growth of microorganisms are greatly affected by the environment and are limited in the application process.

Method used

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  • Method for repairing rare earth pollution by using coupling between suaeda glauca and immobilized microbial agent
  • Method for repairing rare earth pollution by using coupling between suaeda glauca and immobilized microbial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Put the pretreated rare earth contaminated soil into a box with a width of 80 cm and a length of 150 cm, take the cultured Suaeda salsa seedlings (about 15 cm), and transplant them into the rare earth contaminated soil. Each seedling is spaced 30cm apart, which is conducive to the growth of branches.

[0025] b. Sprinkle the prepared immobilized bacterial agent 1:10 v / w into the box prepared in step a, keep the water at 20-30%, and cultivate at 28°C for 90 days, and measure the rare earth in the soil every 10 days Residual amount, the total amount of rare earth in Suaeda salsa was determined at the seedling stage, branching stage and mature stage. During the growth period, there is no need to fertilize, because the immobilized carrier is a by-product of crops, and the selected immobilized mixed bacteria can also decompose phosphorus and potassium, and can release phosphorus and potassium in the carrier, which is enough for plant growth.

Embodiment 2

[0027] a. Take the seeds of Suaeda salsa, cultivate until the seeds germinate, and transfer the germinated seeds to the pretreated rare earth-contaminated soil. Keep moisture 20-30%, temperature 28 ℃. Calculate the survival rate. Cultivate until the seedlings grow to about 15cm.

[0028] b. Sprinkle the prepared immobilized bacterial agent 1:10 v / w into the box prepared in step a, keep the moisture at 20-30%, and cultivate at 28°C for 120 days (the extension of the cultivation time is mainly due to the increase of Suaeda salsa From germination to the time when the seedling is 15cm high), the residual amount of rare earth in the soil was measured every 10 days, and the total amount of rare earth in Suaeda salsa was measured at the seedling stage, branch stage and mature stage. During the growth period, there is no need to fertilize, because the immobilized carrier is a by-product of crops, and the selected immobilized mixed bacteria can also decompose phosphorus and potassium...

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Abstract

The invention relates to a technology for repairing rare earth-polluted soil by using immobilized mixed fungicide and adsorbed pollutants of suaeda glauca and a preparation method. The method achieves an effect of repairing the rare earth-polluted soil by using high adsorbability of the suaeda glauca to rare earth and the coupling of the suaeda glauca with immobilized microorganism mixed bacteria to adsorb the rare earth. The combined immobilized fungicide uses two silicate bacteria of bacillus megaterium and bacillus mucilaginosus as the mixed fungicide; and a crop byproduct is adopted as an immobilized carrier. The adsorption rate of the rare earth in the soil reaches 68.91% through the combination of the suaeda glauca with the microbial agent. The method selects a plant and microbial agent coupling manner to adsorb the soil pollutants, and has such advantages as low carbon, environmental protection, no damage to original places and application to large-area pollution abatement.

Description

technical field [0001] The present invention relates to a technique for repairing rare earth-contaminated soil by coupling Suaeda salsa with immobilized microbial agent, specifically, a technology for repairing rare earth-contaminated soil with immobilized mixed bacterial agent and adsorbed pollutants of Suaeda salsa. Preparation. Background technique [0002] Rare earth metals, also known as rare earth elements, are the general term for the 17 elements of scandium, yttrium, and lanthanide in group IIIB of the periodic table of elements, and are often represented by R or RE. In terms of rare earth agricultural use, my country's rare earth agricultural use began in 1972 and has achieved world-renowned achievements over the past 30 years. First, rare earths can promote seed germination, rare earths can significantly improve seed germination and vigor, and promote protein and fat degradation in seeds. Promote the absorption of soluble sugar by the germ, improve the activity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 郑春丽张雪峰司万童王建英陈敏洁王亚琴聂立程昊
Owner INNER MONGOLIA UNIV OF SCI & TECH
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