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Micro-nano bubble releasing material for repairing natural water body and preparation method thereof

A technology for water body restoration and material release, applied in water aeration, separation methods, chemical instruments and methods, etc., can solve problems such as increasing the concentration of nitrate nitrogen in water bodies, high power and operating costs, and remediation of water bodies that are difficult to anoxic. Achieve the effect of no secondary pollution, improve self-purification ability, and abundant reserves

Inactive Publication Date: 2019-08-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first is the aeration and oxygenation technology. Aeration can effectively increase the DO of the water body, but this method has high power and operating costs, and may lead to sediment resuspension, bottom water heating and water destratification, etc. It may lead to the risk of technology implementation failure; the second is sediment calcium nitrate injection technology. Ions can combine with phosphate in the sediment to form insoluble "calcium phosphorus", thereby reducing the endogenous load of the sediment, but this technology will increase the concentration of nitrate nitrogen in the water body and have the risk of ecological toxicity; Calcium oxide (magnesium) is the main component of the solid oxygen release agent covering technology. The oxygen release agent reacts with water to generate corresponding alkali and oxygen, and then oxygenates the surface of water and sediments. Although most oxygen release agents use The form of coating reduces the reaction rate of calcium peroxide (magnesium) and water and increases its action time, but it will inevitably cause the pH of the surrounding water to rise, and the more oxygen is generated, the corresponding alkalinity will be generated. more substances
These three technologies are difficult to be applied to the actual anoxic water restoration on a large scale due to technical defects.

Method used

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  • Micro-nano bubble releasing material for repairing natural water body and preparation method thereof
  • Micro-nano bubble releasing material for repairing natural water body and preparation method thereof
  • Micro-nano bubble releasing material for repairing natural water body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The oxygen micro-nano bubble release performance of embodiment 1 natural zeolite

[0025] The natural clinoptilolite is ground and sieved, the 2-4mm particles are taken, fully washed with deionized water and the powdery particles are washed out, drained and dried overnight at 80°C, taken out and placed in a muffle furnace at 350°C Burn for 4 hours, cool down and set aside. Take a certain amount of washed and fully dehydrated zeolite samples and place them in a closed stainless steel device with independent inlet valves and exhaust valves and withstand a certain high pressure and vacuum degree for vacuum pressure swing adsorption. The vacuum condition is set to -0.09MPa for 2h , O 2 The high-pressure adsorption condition is 0.45MPa for 0.5h, and the vacuum swing operation steps are cycled 3 times, and the last high-pressure equilibrium time is not less than 12h. After the material is depressurized, it is immediately put into a plexiglass column (inner diameter 64mm, he...

Embodiment 2

[0026] The particle size distribution of the oxygen nano-bubbles released by the natural zeolite of embodiment 2

[0027] The natural clinoptilolite is ground and sieved, and the particles of 0.35-0.60mm are taken, fully washed with deionized water and the powdery particles are washed out, drained and dried overnight at 80°C, taken out and placed in a muffle furnace at 350°C Under burning 4h, cooling stand-by. Take a certain amount of washed and fully dehydrated zeolite samples and place them in a closed stainless steel device with independent inlet valves and exhaust valves and withstand a certain high pressure and vacuum degree for vacuum pressure swing adsorption. The vacuum condition is set to -0.09MPa for 2h , O 2 The high-pressure adsorption condition is 0.15MPa for 0.5h, and the cycle vacuum swing operation steps are 3 times, and the last high-pressure equilibrium time is not less than 12h. After the material is decompressed, put it into a beaker filled with ultrapure...

Embodiment 3

[0028] Embodiment 3 Air Micro Bubble Morphology Released by Diatomite Mineral Particles

[0029] The natural mineral diatomite is ground and sieved, and the particles of 0.355-0.425mm are taken, fully washed with deionized water and the powdery particles are washed out, after draining the water, dry at 80°C overnight, take it out and put it in a vacuum oven at 90°C Medium treatment for 12 hours, the pressure is less than -0.095MPa, and the temperature is lowered for later use. Take a certain amount of processed diatomite particles and place them on a glass slide, submerge them with ultra-pure water with a plastic dropper, use an inverted microscope to observe the process of diatomite releasing micro-bubbles, and take pictures of the micro-bubbles released by it Photo( image 3 ).

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Abstract

The invention belongs to the fields of micro-nano bubble preparation technologies and water environment pollution treatment, and discloses a micro-nano bubble releasing material for repairing a natural water body and a preparation method thereof. After the material is added into a target water body, a large amount of micro-nano bubbles is generated in water, bulk phase micro-nano bubbles are dispersed in overlaying water, the oxygen content of the overlaying water is quickly increased, in the interface, micro-nano bubbles are adhered on the material interface, and thus exist in the covering layer; micro-nano bubbles directly contact with anaerobic deposits, the redox potential of the deposits-water interface is inverted for a long term, and the surface layer deposits are passivated. By controlling the properties of the material, the micro-nano bubble releasing performance is regulated. The provided method for treating a natural water body is ecologically safe and active for a long term, does not used any chemical agent, is nontoxic and harmless, can relieve the oxygen deficiency of the natural water body, avoids the generation of black and odor water, promotes the oxidation and degradation of reducing substances in overlaying water, and creates good conditions for the ecological restoration of polluted water.

Description

technical field [0001] The invention relates to a micro-nano bubble releasing material used for natural water restoration and a preparation method thereof, and belongs to the fields of micro-nano bubble preparation technology and water environment pollution control. Background technique [0002] Dissolved oxygen (DO) is an important environmental factor in aquatic ecosystems, and plays an irreplaceable role in maintaining aquatic life activities and self-purification of aquatic ecosystems. However, as the eutrophication of rivers and lakes becomes more and more serious, harmful algal blooms occur frequently, and the easily degradable algal cells die and settle to the surface of the sediment. Their decay and decomposition cause a rapid decline in the concentration of DO in the overlying water body, resulting in The phenomenon of hypoxia not only seriously deteriorates the water quality, aquatic biome and sediment quality, but also destroys the balance and self-regulation abil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F7/00C02F1/00B01D53/04
CPCB01D53/04C02F1/00C02F7/00C02F2103/007Y02W10/10
Inventor 潘纲苗肖君毕磊张美一
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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