Compound bacterium soil remediation agent and preparation method thereof

A technology of soil remediation agent and compound bacteria, applied in the restoration of contaminated soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of low survival rate, limit the wide application of compound bacteria soil remediation agent, and low repair efficiency , to achieve the effect of increasing cross-linking density, enhancing rigidity and enhancing adsorption

Pending Publication Date: 2022-04-12
冯悦如
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the road of researching contaminated soil remediation technology, the compound bacteria soil remediation agent stands out among all kinds of soil remediation agents due to its advantages of environmental protection, low energy consumption, wide source and high remediation efficiency. Extremely high, low remediation efficiency and low survival rate in harsh soil environments with multiple pollutions such as heavy metals, which greatly limits the wide application of compound bacterial soil remediation agents

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  • Compound bacterium soil remediation agent and preparation method thereof
  • Compound bacterium soil remediation agent and preparation method thereof

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Effect test

Embodiment 1

[0035] A composite bacteria soil restoration agent mainly includes 30 parts of carbon gel layer, 40 parts of composite bacteria and 24 parts of microporous layer in parts by weight. The preparation method of described composite bacteria soil restoration agent comprises the following preparation steps:

[0036] (1) Under the conditions of humidity of 38%, discharge distance of 6mm, input power of 70W and nitrogen protection, the cellulose was plasma-treated for 2 minutes to obtain pretreated cellulose; at 24°C and 350r / min, the pretreated The treated cellulose, nickel nitrate, iron nitrate and deionized water were mixed and stirred for 60 minutes at a mass ratio of 1:0.8:0.8:11, frozen at -10°C for 11 hours, and then freeze-dried at -57°C and 12Pa for 47 hours to obtain a composite Cellulose gel; under nitrogen atmosphere, heat up to 780°C at 1°C / min, calcinate the composite cellulose gel for 1.8h, continue to heat up to 1100°C at the same heating rate, calcinate for 1.5h, take...

Embodiment 2

[0041] A composite bacteria soil restoration agent mainly includes 35 parts of carbon gel layer, 50 parts of composite bacteria and 30 parts of microporous layer in parts by weight. The preparation method of described composite bacteria soil restoration agent comprises the following preparation steps:

[0042] (1) Under the conditions of humidity of 40%, discharge distance of 6.5mm, input power of 75W and nitrogen protection, the cellulose was plasma-treated for 2.5min to obtain pretreated cellulose; at 25°C and 400r / min, The pretreated cellulose, nickel nitrate, iron nitrate and deionized water were mixed and stirred for 70 minutes according to the mass ratio of 1:0.85:0.85:11.5, frozen at -7°C for 12h, and then freeze-dried at -56°C and 15Pa for 48h. Obtain a composite cellulose gel; in a nitrogen atmosphere, raise the temperature to 800°C at 2°C / min, calcinate the composite cellulose gel for 1.95h, continue to heat up to 1200°C at the same heating rate, calcinate for 1.65h,...

Embodiment 3

[0047] A composite bacteria soil restoration agent mainly includes 40 parts of carbon gel layer, 60 parts of composite bacteria and 36 parts of microporous layer in parts by weight. The preparation method of described composite bacteria soil restoration agent comprises the following preparation steps:

[0048] (1) Under the conditions of humidity of 42%, discharge distance of 7mm, input power of 80W and nitrogen protection, the cellulose was plasma-treated for 3 minutes to obtain pretreated cellulose; at 26°C and 450r / min, the pretreated The treated cellulose, nickel nitrate, ferric nitrate and deionized water were mixed and stirred for 80 minutes at a mass ratio of 1:0.9:0.9:12, frozen at -4°C for 13 hours, and then freeze-dried at -55°C and 18Pa for 49 hours to obtain a composite Cellulose gel; under nitrogen atmosphere, heat up to 820°C at 3°C / min, calcinate the composite cellulose gel for 2.1h, continue to heat up to 1300°C at the same heating rate, calcinate for 1.8h, tak...

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Abstract

The invention discloses a compound bacterium soil remediation agent and a preparation method thereof, and relates to the technical field of soil remediation agents. The preparation method comprises the following steps: firstly, carrying out a plasma-assisted calcination process by using ferric nitrate, nickel nitrate and cellulose to obtain a carbon gel layer with magnetic and rigid foam structures; soaking the carbon gel layer in a composite strain solution to obtain a carbon gel layer containing a composite strain; finally, 4-aminophenonitrile and pyromellitic dianhydride are used for wrapping the surface of the carbon gel layer containing the composite strains with a microporous layer through a microwave-assisted liquid phase deposition technology, and the composite bacterium soil remediation agent is prepared. Under the illumination condition, organic dye in heavy metal soil can be adsorbed and degraded, and light energy is converted into electric energy to generate micro-current to promote reproduction of compound bacteria. The prepared compound bacterium soil remediation agent is high in adsorbability, easy to recycle and long in service life, organic pollutants in heavy metal contaminated soil can be efficiently degraded under the illumination condition, and remediation of the soil is accelerated by accelerating reproduction of compound bacteria.

Description

technical field [0001] The invention relates to the technical field of soil remediation agents, in particular to a composite bacteria soil remediation agent and a preparation method thereof. Background technique [0002] With the continuous acceleration of the industrialization process, the unreasonable exploitation of mineral resources and their smelting discharge, the long-term sewage irrigation and sludge application to the soil, the atmospheric subsidence caused by human activities, and the application of chemical fertilizers and pesticides, etc., the existing cultivated land in China has Nearly one-fifth of them are polluted to varying degrees. Contaminated soil will lead to crop yield reduction, and may even cause pollutants in agricultural products to exceed the standard, thereby endangering human health. In addition, with the acceleration of economic development and urbanization, the site pollution caused by industrial and mining enterprises is also very serious. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/10
Inventor 冯悦如
Owner 冯悦如
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