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Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material

A composite function, biochemical technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. The effect of great hardness and strength

Active Publication Date: 2014-04-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantages of secondary pollution, blockage, and difficult control of carbon sources in existing polluted groundwater remediation methods, and provides a composite functional material for biochemical joint remediation of polluted groundwater and a preparation method thereof; the present invention is suitable for affected Organic and inorganic pollutants and heavy metal-contaminated groundwater remediation, using carbon source materials that are both environmentally friendly and easily utilized by microorganisms, reduced iron powder that can maintain a certain anaerobic environment in the groundwater environment, and various inorganic bonding raw materials compound formula, uniform spherical shape Granulation, triple controlled release of inner core, filling material layer and outer shell, has the advantages of slow release of carbon source and reduced iron, environmental protection and no pollution, small water resistance coefficient, less bypass flow, etc., can remove target pollutants more efficiently and quickly

Method used

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  • Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material
  • Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material
  • Composite functional material for performing biochemical combined remediation on polluted underwater and preparation method for composite functional material

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Embodiment 1

[0039] The composite functional material of this embodiment carries out the principle of biochemical joint restoration of contaminated groundwater: the carbon-releasing raw materials contained in the material filling layer and the inner wood block can provide the required organic carbon source for the metabolism of heterotrophic microorganisms, and the material filling layer The zero-valent iron released from the groundwater layer can consume dissolved oxygen in the groundwater environment through chemical reactions, providing a good anaerobic environment for heterotrophic microorganisms, which is conducive to the biodegradation of pollutants in groundwater by heterotrophic microorganisms, and the carbon dioxide produced by heterotrophic microorganisms can also Provide the inorganic carbon source required for metabolism of autotrophic microorganisms, two kinds of microorganisms can coexist without competition, heterotrophic microorganisms and autotrophic microorganisms participa...

Embodiment 2

[0053] The composite functional material used in the combined biochemical restoration of contaminated groundwater in this example is basically the same as in Example 1, except that the outer diameter of the composite functional material in this example is 0.9-1.5 cm, and the pore diameter is 10-300 μm. The distance between them is 50-400um. The composite functional material includes an inner core, a material filling layer and an outer shell; the particle size of the inner core is 3mm, and the material filling layer is composed of the following components in mass percentage: 33.3% of carbon-releasing raw material (soybean straw), plastic bonding raw material ( Attapulgite) 33.3%, reduced iron powder 6.7%, and natural binder 26.7%. The shell is composed of the following components by mass percentage: 48% of plastic bonding raw materials (12% for ordinary Portland cement, 36% for attapulgite), 12% for high permeability raw materials (8% for diatomite , fine quartz sand is 4%), t...

Embodiment 3

[0064] The composite functional material used in the combined biochemical restoration of contaminated groundwater in this example is basically the same as in Example 1, except that the outer diameter of the composite functional material in this example is 0.9-1.4 cm, and the pore diameter is 5-350 um. The distance between them is 10-300um. The composite functional material includes an inner core, a material filling layer and an outer shell; the particle size of the inner core is 4 mm, and the material filling layer is composed of the following components in mass percentage: 41.7% of carbon-releasing raw material (wheat straw), plastic bonding raw material ( Attapulgite) 25%, reduced iron powder 3.3%, natural binder 30%. The shell is composed of the following components by mass percentage: 26.6% of plastic bonding raw materials (13.3% for ordinary Portland cement, 13.3% for attapulgite), 40% for high permeability raw materials (diatomaceous earth), this Examples The pore diame...

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Abstract

The invention discloses a composite functional material for performing biochemical combined remediation on polluted underwater and a preparation method for the composite functional material and belongs to the technical field of underground water remediation. The composite functional material disclosed by the invention comprises a core, a material filling layer and a shell, wherein the core is made of a wood block; the material filling layer comprises 20-50 percent of a carbon release raw material, 25-42.8 percent of a plastic sticky raw material, 3.3-8 percent of reducing iron powder and the balance of a natural adhesive; the shell comprises 26.6-60 percent of a plastic sticky raw material, 12-40 percent of a high-permeation raw material and the balance of a natural adhesive. The preparation method for the composite functional material disclosed by the invention adopts a spherical granulation technology and is easy to operate and low in cost. By the adoption of triple controlled release, namely the core, the material filling layer and the shell, the composite functional material has the advantages of capacity of slowly releasing a carbon source and reducing iron, environment-friendliness, no pollution, small water resistance coefficient, low streaming and the like and can remove target pollutants in a more high-efficiency and quicker manner.

Description

technical field [0001] The invention relates to the technical field of combined restoration of polluted groundwater, in particular to a composite functional material for biochemical combined restoration of polluted groundwater and a preparation method thereof. Background technique [0002] With the shortage of water resources and the increasing pollution of rivers, mankind is facing another water crisis - groundwater pollution. Groundwater pollution has become one of the most prominent water resource environmental problems in the world, and it is difficult to discover, detect directly and control. At present, groundwater is widely polluted by inorganic substances, organic substances and heavy metals, and the area of ​​pollution continues to expand, and the degree of pollution is increasing day by day. The preliminary research of the Institute of Environmental Chemistry of the Chinese Academy of Sciences on the organic pollution of groundwater in the Beijing-Tianjin-Tangshan...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28
Inventor 郭红岩张会玲阮晓红季荣尹颖艾弗逊贾军白莹
Owner NANJING UNIV
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