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A kind of microorganism immobilization agent and its preparation method and application

A microbial immobilization and biochar technology, which is applied in the field of environmental engineering and pollution treatment engineering, can solve the problems of treatment technology reports, etc., and achieve the effects of wide sources, increased adhesion area, and improved specific surface and adsorption capacity

Active Publication Date: 2019-07-02
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there are relatively few reports on the treatment technologies that can recycle heavy metals and organic waste water at the same time.

Method used

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  • A kind of microorganism immobilization agent and its preparation method and application
  • A kind of microorganism immobilization agent and its preparation method and application
  • A kind of microorganism immobilization agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] One, the preparation method of microorganism immobilization agent

[0046] (1) Preparation of biochar: Take the straw, wash it, air dry it, crush it, pass it through a 2mm sieve, and pyrolyze it under anaerobic conditions at 600°C for 2 hours, and then carbonize it; after the carbonized product is naturally cooled, grind it and take 200-400 mesh The retentate between the sieves was treated with 1mol / L hydrochloric acid for 2 hours to remove ash, washed with distilled water until the washing liquid was neutral, and dried at 80°C to obtain biochar.

[0047] (2) Fe 2 o 3 , Fe 3 o 4 load of:

[0048] a: Take 100g of biochar obtained in step (1) and add it to 1L biochar containing 0.25mol FeCl 3 In the aqueous solution, add NaOH solution again, after stirring for 4h, collect the precipitate; Fe 3+ The molar ratio with NaOH is 1:7;

[0049] b: Wash the precipitate with deionized water for 6 times, mix the precipitate with NaOH solution and place it in a hydrothermal ke...

Embodiment 2

[0085] In recovery example 1, the modified biochar IV loaded with nano-CdS after the treatment of heavy metal and organic waste water was washed 5-6 times with deionized water, dried at 80°C, and used to treat Cr(VI): 85.2 mg / L, 4-chloroaniline: 27.9mg / L, 4-chlorophenol: 31.8mg / L, rhodamine B dye: 25.3mg / L, waste water with a pH of 6.5. The material dosage is 15g / L.

[0086] Under the condition of stirring, the removal rates of Cr(VI), 4-chloroaniline, 2,4-chlorophenol and rhodamine B dyes were 99.1%, 99.2%, 98.2% and 96.8% respectively after light reaction for 8 hours.

Embodiment 3

[0092] One, the preparation method of microorganism immobilization agent

[0093] (1) Preparation of biochar: Take the straw, wash it, air dry it, crush it, pass it through a 2mm sieve, and pyrolyze it under anaerobic conditions at 600°C for 2 hours, and then carbonize it; after the carbonized product is naturally cooled, grind it and take 200-400 mesh The retentate between the sieves was treated with 1mol / L hydrochloric acid for 2 hours to remove ash, washed with distilled water until the washing liquid was neutral, and dried at 80°C to obtain biochar.

[0094] (2) Fe 2 o 3 , Fe 3 o 4 load of:

[0095] a: Take 100g of biochar obtained in step (1) and add it to 1L biochar containing 0.3125mol FeCl 3 In the aqueous solution, add NaOH solution again, after stirring for 4h, collect the precipitate; Fe 3+ The molar ratio with NaOH is 1:7;

[0096] b: Wash the precipitate with deionized water for 6 times, mix the precipitate with NaOH solution and place it in a hydrothermal ...

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Abstract

The invention discloses a microbial immobilizing agent and its preparation method and application. The microbial immobilizing agent uses biochar as a carrier and loads Fe. 2 O 3 and Fe 3 O 4 , in mass percentage, the Fe 2 O 3 The loading amount is 5-25%, and the particle size is 10-100nm; the Fe 3 O 4 The loading amount is 5-15%, and the particle size is 10-100nm. The microbial immobilizing agent of the present invention uses biochar as a carrier and loads Fe 2 O 3 and Fe 3 O 4 , used as a fixative for microorganisms, not only improves the specific surface and adsorption capacity of biochar, increases the attachment area of ​​microorganisms to be immobilized, and improves the treatment effect of heavy metal pollutants in wastewater, but also uses Fe 2 O 3 is the photocatalyst, Fe 3 O 4 As a photocatalytic accelerator, it can significantly improve the treatment effect of organic pollutants in wastewater.

Description

technical field [0001] The invention relates to the technical fields of environmental engineering and pollution treatment engineering, in particular to a microorganism immobilizing agent and its preparation method and application. Background technique [0002] With the development of modern industry, a large amount of heavy metal wastewater is produced every year. The toxicity of heavy metals is persistent, and they are a type of potentially harmful pollutants. If they are not treated, they will definitely pose a serious threat to the ecological environment and human health. However, as a class of important precious resources, heavy metals have high use value. Therefore, how to effectively control heavy metal pollution in water, protect human health and the ecological environment, and recycle heavy metals to alleviate the pressure on my country's resources and environment is currently impossible. Ignore the problem. [0003] Heavy metal sulfides are an important means to rem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N11/14B01J27/043C01G49/06C01G49/08C02F3/34C02F101/20
CPCC12N11/14C01G49/06C01G49/08C02F3/34B01J27/043C02F2101/20B01J35/39Y02W10/37
Inventor 徐灿灿刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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