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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 microbe immobilizing agent as well as a preparation method and applications of the microbe immobilizing agent. According to the microbe immobilizing agent, charcoal is taken as a carrier, Fe2O3 and Fe3O4 are loaded, based on the weigh percentage, the loading amount of Fe2O3 is 5-25 %, the grain diameter of Fe2O3 is 10-100 nm, the loading amount of Fe3O4 is 5-15 %, and the grain diameter of Fe3O4 is 10-100 nm. According to the microbe immobilizing agent, the charcoal is taken as the carrier, Fe2O3 and Fe3O4 are loaded, and when the microbe immobilizing agent is taken as the immobilizing agent of microbes, the specific surface and adsorption capacity of the charcoal are improved, the adhering area of the to-be-immobilized microbes is increased, and the treatment effect for heavy metal pollutants in wastewater is improved; in addition, Fe2O3 is taken as the photocatalyst, Fe3O4 is taken as the photocatalysis promoter, and finally, the treatment effect for the organic pollutants in the wastewater is obviously improved.

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
CPCY02W10/37
Inventor 徐灿灿刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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