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Slow oxygen releasing material for repairing underground water and preparation method for slow oxygen releasing material

A technology for groundwater remediation and slow-release oxygen, applied in aerobic process treatment, sustainable biological treatment, etc., can solve the problems of short oxygen-releasing cycle of oxygen-releasing materials, high pH value of groundwater, low strength of oxygen-releasing materials, etc. Low, no environmental pollution, obvious advantages

Active Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the groundwater restoration process such as the low strength of the oxygen-releasing material, the high pH value of the groundwater after the oxygen-releasing material is used, and the short oxygen-releasing cycle of the oxygen-releasing material, the present invention provides a groundwater restoration Slow-release oxygen material and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Proportion The slow-release oxygen material for groundwater restoration of the present invention, the weight ratio of each component in the core material is: 60% magnesium peroxide; 12% ordinary Portland cement, 8% attapulgite; 4% kaolin, 6% Tourmaline; 3% quartz sand, 7% diatomaceous earth.

[0031] The shell material is added, and the weight ratio of the components of the shell material is: 12% ordinary portland cement, 31% montmorillonite; 15% fly ash, 35% tourmaline; 2% quartz sand, 5% diatomite.

[0032] Wherein, the particle diameter of the core is 0.5 cm, and the thickness of the shell is 0.05 cm. The spherical material is placed in a closed space for curing for 2 days.

[0033] The particle strength is about 30N when the particle size is 0.55cm. In the static test with an dosage of 2g / L, the dissolved oxygen reached a static equilibrium of 10mg / L in 20 days, the pH was 10.3-10.5, and the oxygen release cycle was 6 months. In the dynamic test with a flow rate ...

Embodiment 2

[0035] Proportion The slow-release oxygen material for groundwater restoration of the present invention, the weight ratio of each component in the core material is: 50% magnesium peroxide; 11% ordinary portland cement, 11% composite portland cement, 10% attapulgite Stone; 3% kaolin, 3% tourmaline, 2% fly ash; 3% quartz sand, 2% diatomaceous earth, 5% expanded perlite.

[0036] Add the shell material, the weight ratio of each component of the shell material is: 12% ordinary Portland cement, 10% composite Portland cement, 10% attapulgite, 11% montmorillonite; 15% fly ash, 20% Tourmaline, 15% kaolin; 2% quartz sand, 2% diatomaceous earth, 3% expanded perlite.

[0037] Among them, the core particle diameter is 0.67cm, and the shell thickness is 0.05cm. The spherical material was placed in a closed space for curing for 3 days.

[0038] The particle strength is about 25N when the particle size is 0.72cm. In the static test with an dosage of 2g / L, the dissolved oxygen reached a st...

Embodiment 3

[0040] Proportioning The slow-release oxygen material for groundwater restoration of the present invention, the weight proportion of each composition in the core material is: 80% calcium peroxide, 10% ordinary Portland cement, 1% kaolin, 9% diatomaceous earth slow-release oxygen core material.

[0041] The shell material is added, and the weight ratio of the components of the shell material is: 40% montmorillonite, 10% diatomite, and 50% tourmaline.

[0042] Among them, the core particle diameter is 0.7cm, and the shell thickness is 0.05cm. The spherical material is placed in a closed space for curing for 2 days.

[0043] The particle strength is about 25N when the particle size is 0.75cm. In the static test with an dosage of 2g / L, the dissolved oxygen reached a static equilibrium of 10.5mg / L in 18 days, the pH was 10.6-10.8, and the oxygen release cycle was 6 months. In the dynamic test with a flow rate of 5ml / min and a dosage of 40g, the dissolved oxygen in the effluent i...

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Abstract

The invention discloses a slow oxygen releasing material for repairing underground water and a preparation method for the slow oxygen releasing material, and belongs to the field of materials for treating sewage. The slow oxygen releasing material for repairing the underground water comprises a kernel material and a shell material, wherein the kernel material consists of an oxygen releasing agent, a plastic adhesive ore, a pH buffering agent and a high-permeability material; and the shell material consists of a plastic adhesive ore, a pH buffering agent and a high-permeability material. The preparation method for the slow oxygen releasing material comprises the following steps of: (1) smashing all the raw materials except for the high-permeability base material; (2) smashing all components in the high-permeability base material except for quartz sand; (3) uniformly mixing the materials, and granulating; (4) adding the shell material into the mixture; and (5) maintaining. The material can effectively increase the dissolved oxygen content in an underground water environment, so that the dissolved oxygen in the underground water can meet a requirement.

Description

technical field [0001] The invention belongs to the field of sewage treatment materials, and more specifically relates to a material used for groundwater pollution restoration and a preparation method thereof. Background technique [0002] Groundwater is a general term for various forms of water that exist in the voids of rock (soil) layers below the surface. The groundwater mainly comes from the infiltration of atmospheric precipitation and surface water; at the same time, it recharges rivers, lakes and swamps through underground seepage, or directly injects into the ocean; the water in the upper soil is evaporated or absorbed by plant roots and then released into the air. Returning to the atmosphere, it actively participates in the water cycle process on the earth, as well as processes such as dissolution, landslides, and soil salinization that occur on the earth. Therefore, the groundwater system is an important subsystem of the large water cycle system in nature. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 阮晓红李明尹琳朱晓明
Owner NANJING UNIV
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