CN115428726A - Method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation - Google Patents
Method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation Download PDFInfo
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- CN115428726A CN115428726A CN202210995840.0A CN202210995840A CN115428726A CN 115428726 A CN115428726 A CN 115428726A CN 202210995840 A CN202210995840 A CN 202210995840A CN 115428726 A CN115428726 A CN 115428726A
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G33/00—Cultivation of seaweed or algae
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Abstract
The invention discloses a method for sequestering carbon dioxide into the ocean by supplementing a phosphorus source, comprising the following steps: assembling a phosphorus source loader, and carrying out marine transportation through a ship; selecting a nutrient salt resource deficient area, transporting the phosphorus source loader to a continental shelf and then releasing the phosphorus source loader; opening a switch of a phosphorus source loader, and allowing the phosphorus source substances loaded inside to enter the ocean through the switch to form a nutrient plume; the nutrient plume is mixed and diffused to a vacuum area through the ocean and is continuously conveyed to a remote sea area through the ocean current on the seabed; the phosphorus source and sunlight cause phytoplankton in the euphotic layer to proliferate in large numbers as the phosphorus source and other added nutrients or naturally occurring nutrients are consumed. The photosynthesis of marine phytoplankton is increased by delivering a source of phosphorus into the ocean to increase the number of phytoplankton species in the true light layer. The photosynthesis converts atmospheric carbon dioxide into organic matters, and the organic matters are settled to the seabed, so that the sealing amount of the ocean to the carbon dioxide is realized, and the concentration of the carbon dioxide in the atmosphere is reduced.
Description
Technical Field
The invention belongs to the technical field of carbon sequestration, and particularly relates to a method for sequestering carbon dioxide into ocean by supplementing a phosphorus source.
Background
The ocean plays an important role in the global carbon cycle. As a huge carbon sink, carbon can be stored for a long time. Relevant studies have shown that 25% of the total carbon dioxide increase in deep water is due to dissolution of calcium carbonate and 75% is due to decomposition of organic matter. The method can promote the process of converting carbon dioxide in the atmosphere into organic carbon by stimulating the photosynthetic activity of the marine phytoplankton population, and can realize the sealing of carbon dioxide gas.
Nitrogen and phosphorus are the major limiting factors for phytoplankton growth in the ocean. Since nitrogen directly participates in the circulation of the atmosphere and is a main relevant element for global problems such as greenhouse effect, global warming and acid rain, the related research on the relationship between the circulation of nitrogen and global changes at home and abroad is abundant. In contrast, studies related to phosphorus have not attracted sufficient attention.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a technical scheme of a method for sequestering carbon dioxide into the ocean by supplementing a phosphorus source.
The method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation is characterized by comprising the following steps:
(1) Assembling a phosphorus source loader, and carrying out marine transportation through a ship;
(2) Selecting a nutrient salt resource deficient area, transporting the phosphorus source loader to a continental shelf, and then releasing the phosphorus source loader to enable the phosphorus source loader to be placed in the ocean and float along with the ocean current;
(3) Opening a switch of a phosphorus source loader, and enabling the phosphorus source substances loaded inside to enter the sea through the switch to form a nutrient plume;
(4) The nutrient plume is mixed and diffused to a vacuum area through the ocean and is continuously conveyed to a remote sea area through the ocean current on the seabed;
(5) The phosphorus source and sunlight cause phytoplankton in the euphotic layer to proliferate in large numbers as the phosphorus source and other added nutrients or naturally occurring nutrients are consumed;
(6) The phytoplankton is decomposed into organic matters after death, carbon carrying atmospheric carbon dioxide is deposited to the seabed, and the carbon is sealed in a deep ocean layer or the seabed.
Further, the phosphorus source loader is made of polycaprolactone and is decomposed by contacting with seawater;
and a polycaprolactone degrading strain is smeared and arranged inside the switch of the phosphorus source loader.
Further, after phytoplankton proliferates, large phytoplankton patches are formed, and photosynthesis proceeds during the maintenance period, converting carbon dioxide in the atmosphere into organic carbon.
Furthermore, after the phytoplankton is proliferated, zooplankton and high-nutrition-level fishes are increased, the zooplankton and the fishes are decomposed into organic matters after death, carbon carrying atmospheric carbon dioxide is deposited to the seabed, and the carbon is sealed and stored in a deep ocean layer or the seabed.
Further, phosphorus source particles including CaHPO are filled in the inner cavity of the phosphorus source loader 4 、Ca(H 2 PO 4 ) 2 、Ca 3 (PO 4 ) 2 And (NH) 4 ) 3 PO 4 、(NH 4 ) 2 HPO 4 。
Further, the phosphorus source particles are insoluble in water.
Further, the depth of the organic matter deposition area is at least 1km.
Further, the phosphorus source loader can float in the true light layer of the ocean and cannot sink to the dull light layer.
Compared with the prior art, the invention has the following advantages:
compared with pipeline transportation, the cost of pipeline facility construction and later maintenance is saved. The pipeline transportation is adopted, the putting place of the phosphorus source is fixed, and the ship transportation has higher fluidity and flexibility.
And, increasing the photosynthesis of the marine phytoplankton by delivering a source of phosphorus into the ocean to increase the number of phytoplankton species in the true light layer. The photosynthesis converts atmospheric carbon dioxide into organic matters, and the organic matters are settled to the seabed, so that the sealing amount of the ocean to the carbon dioxide is realized, and the concentration of the carbon dioxide in the atmosphere is reduced.
Drawings
FIG. 1 is a schematic diagram of the process of the present invention;
FIG. 2 is a schematic diagram of the phosphorus source loader according to the present invention.
In the figure: 1, a ground surface; 2, a continental shelf; 3, a seabed; 4, a ship; 5, ocean currents; 6, a nutrient plume; 7 organic matter; 8, a phosphorus source loader; 9 switch.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1-2, a method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation, comprising the steps of:
firstly, assemble phosphorus source loader 8 at ground 1, phosphorus source loader 8 is made by degradable material, and this embodiment uses polycaprolactone to make, decomposes with the sea contact, can not cause secondary pollution and harm to the ocean after the complete decomposition. The phosphorus source loader is transported on the sea by a ship 4, which can be a fishing boat or a cargo ship, generally selects a nutrient salt resource deficient area, and the addition of the phosphorus source can not cause water eutrophication. Transporting the phosphorus source loading area to the vacuum area of the area, and adding the phosphorus source to increase the number of phytoplankton in the area. Phosphorus source particles are filled in the inner cavity of the phosphorus source loader and can be calcium orthophosphate salts such as CaHPO4, ca (H2 PO 4) 2, ca3 (PO 4) 2 and the like and ammonium phosphate salts such as (NH 4) 3PO4, (NH 4) 2HPO4 and the like.
The transportation to the vacuum area by ships can be realized by the following steps: the phosphorus source loader is transported to the continental shelf 2 and released, so that the phosphorus source loader is placed in the ocean and floats with the ocean current. And opening a switch 9 of the phosphorus source loader, allowing the phosphorus source substances loaded inside to enter the sea through the switch 9 to form a nutrient plume 6, and smearing polycaprolactone degrading strains inside the switch of the phosphorus source loader to accelerate the decomposition of the switch and release the phosphorus source in time.
The nutrient plume 6 is mixed and diffused to a sunlight area through the ocean and is continuously conveyed to a remote sea area through ocean currents on the seabed 3, and in the transportation process, the phosphorus source loader can float in the sunlight layer of the ocean and cannot sink to a lightless layer.
The phosphorus source and sunlight cause phytoplankton in the euphotic layer to proliferate in large numbers as the phosphorus source and other added nutrients or naturally occurring nutrients are consumed. After the phytoplankton proliferates, large phytoplankton patches are formed, and photosynthesis proceeds during the maintenance period, converting carbon dioxide in the atmosphere into organic carbon. After phytoplankton is proliferated, zooplankton and high-nutrient fish increase, and move around phytoplankton plaques.
Dead phytoplankton and other living systems are broken down by bacteria into organic matter 7. The organic matter 7 carries carbon from atmospheric carbon dioxide to the seabed for efficient sequestration of the carbon into the deeper ocean layers or seabed 3. The depth of the organic matter 7 deposition area is sufficient to allow the organic matter into which dead phytoplankton and other living systems are broken down to fall. At least 1000 meters, preferably the depth of the deposition area is 1500 meters.
By increasing the phosphorus source, the fishes and shrimps can also increase along with the increase of primary producers, and the phosphorus source has a certain promotion effect on the recovery of marine fishery resources. The phosphorus source assembler can be completely decomposed without causing redundant pollution to the ocean. The ship transportation has higher flexibility and mobility, and fixed-point delivery can be realized.
The principle of the method is to increase the carbon fixation amount of the biological pump. The photosynthesis of marine phytoplankton is increased by delivering a source of phosphorus into the ocean to increase the number of phytoplankton species in the true light layer. The photosynthesis converts the carbon dioxide in the atmosphere into organic matters, and the organic matters settle to the seabed, thereby realizing the sealing amount of the ocean on the carbon dioxide and reducing the concentration of the carbon dioxide in the atmosphere.
Specifically, the method transfers a phosphorus source to the true light layer of the ocean, phytoplankton utilizes the phosphorus source to carry out photosynthesis to convert atmospheric carbon dioxide into organic carbon, the phytoplankton is predated by zooplankton and higher nutrition level, dead phytoplankton and other ecological systems are decomposed into organic matters by bacteria, and the organic matters fall into the deep ocean. Organic carbon is present in the organic matter, thereby achieving sequestration of the carbon. And a phosphorus source is added to the true light layer, so that the effect of ocean carbon sink is enhanced, and the concentration of carbon dioxide in the atmosphere is reduced.
On the other hand, the phosphorus source loader is made of a novel polyester composite material Polycaprolactone (PCL). The polycaprolactone has good mechanical property, and can be processed and manufactured into the loader by injection molding, blow molding, die pressing, extrusion and other forming methods. Polycaprolactone is easily decomposed into water and carbon dioxide by microorganisms and enzymes in nature, and redundant pollution to the sea can not be caused. In soil and water environment, polycaprolactone can be completely decomposed in more than 6 months, high-concentration inorganic salt has certain promotion effect on the non-enzymatic hydrolysis process, the polycaprolactone can be decomposed in a seawater environment only for several days, and the complete decomposition time can be greatly shortened.
The melting point of polycaprolactone is 60 ℃, which is far higher than the temperature of seawater and can not be melted by seawater. The density of polycaprolactone at 25 deg.C is 1.146, and the density of seawater is generally between 1.02 and 1.07, depending on temperature, salinity and pressure (or depth). This provides a reliable basis for the phosphorous source loader to float in the true light layer. Polycaprolactone is well soluble in aromatic compounds, ketones and polar solvents, is insoluble in phosphate, and is a superior loader for the phosphorus source of the present invention.
Compared with pipeline transportation, the cost of pipeline facility construction and later maintenance is saved. The pipeline transportation is adopted, the putting place of the phosphorus source is fixed, and the ship transportation has higher fluidity and flexibility.
The marine true light layer in the target area for transporting the phosphorus source is also called a light transmission zone, which refers to the part of the water layer with light transmission, is the water layer with the most active ecological effect of marine organisms, and is also the zone with the highest primary productivity. Typically, the true light zone extends from the ocean surface to a depth of about 50 meters. The actual depth of the light zone depends on many factors, including wind strength and heat loss due to the temperature difference between the surface water of the ocean and the lower atmosphere. The true light region of the partial region may extend to a depth of 100 meters or more.
The phosphorus source herein refers to one or more phosphorus-containing compounds that phytoplankton may utilize. In an embodiment of the invention, the phosphorus source used is orthophosphate. Orthophosphoric acid is a tribasic acid, with three orthophosphates: dihydrogen phosphate MH2PO4, hydrogen phosphate MHPO4 and orthophosphate M3PO4.M can be monovalent metal such as sodium and potassium, and can also be other valence state metals such as calcium and ammonium.
Ocean currents refer to currents that include a region of the ocean where a source of nitrogen and phytoplankton can be transported directly to the ocean at a selected location in the ocean. The following may also be understood: at least one or more water streams at or near the selected location carry the phosphorus source and phytoplankton to more remote areas where prevailing water streams move the phosphorus source and phytoplankton to the ocean area.
Carbon that settles into the seabed as organic matter can be sequestered from the atmosphere for at least 100 years, and may be as long as 500 or 1000 years, or even longer, depending on the location of its settlement and the carrying and transporting action of the ocean currents.
Claims (8)
1. A method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation, characterized by comprising the steps of:
(1) Assembling a phosphorus source loader, and carrying out marine transportation through a ship;
(2) Selecting a nutrient salt resource deficient area, transporting the phosphorus source loader to a continental shelf, and then releasing the phosphorus source loader to enable the phosphorus source loader to be placed in the ocean and float along with the ocean current;
(3) Opening a switch of a phosphorus source loader, and allowing the phosphorus source substances loaded inside to enter the ocean through the switch to form a nutrient plume;
(4) The nutrient plume is mixed and diffused to a vacuum area through the ocean and is continuously conveyed to a remote sea area through the ocean current on the seabed;
(5) The phosphorus source and sunlight cause phytoplankton in the euphotic layer to proliferate in large numbers as the phosphorus source and other added nutrients or naturally occurring nutrients are consumed;
(6) The phytoplankton is decomposed into organic matters after death, carbon carrying atmospheric carbon dioxide is deposited to the seabed, and the carbon is sealed and stored in a deep ocean layer or the seabed.
2. The method of sequestering carbon dioxide into the ocean by phosphorus source supplementation of claim 1, wherein the phosphorus source loader is made of polycaprolactone, decomposes upon contact with seawater;
and a polycaprolactone degrading strain is smeared and arranged inside the switch of the phosphorus source loader.
3. The method of claim 1, wherein the phytoplankton are grown to form large phytoplankton patches, and photosynthesis is performed during the maintenance period to convert atmospheric carbon dioxide to organic carbon.
4. The method of sequestering carbon dioxide into the ocean by phosphorus source supplementation according to claim 3, wherein after phytoplankton proliferation, zooplankton and high trophic fish increase, and after death, zooplankton and fish decompose into organic matter, carbon carrying atmospheric carbon dioxide deposits to the ocean floor, sequestering carbon in deep ocean layers or the seabed.
5. The method of sequestering carbon dioxide in the ocean by phosphorous source supplementation according to claim 1, wherein phosphorous source loader lumen is filled with phosphorous source particles comprising CaHPO 4 、Ca(H 2 PO 4 ) 2 、Ca 3 (PO 4 ) 2 And (NH) 4 ) 3 PO 4 、(NH 4 ) 2 HPO 4 。
6. The method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation according to claim 5, characterized in that the phosphorus source particles are insoluble in water.
7. The method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation according to claim 1 or 4, characterized in that the depth of the organic matter deposition area is at least 1km.
8. The method for sequestration of carbon dioxide into the ocean by phosphorus source sequestration as claimed in claim 1, wherein the phosphorus source cartridge is capable of floating in the true optical layer of the ocean without sinking to a matte layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210995840.0A CN115428726A (en) | 2022-08-19 | 2022-08-19 | Method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation |
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| CN202210995840.0A CN115428726A (en) | 2022-08-19 | 2022-08-19 | Method for sequestration of carbon dioxide into the ocean by phosphorus source supplementation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220411590A1 (en) * | 2021-06-29 | 2022-12-29 | National Tsing Hua University | Nanonetwork with controlled chirality and manufacturing method thereof |
| WO2024075126A1 (en) | 2022-10-06 | 2024-04-11 | Gigablue Ltd | Population of particles, method for preparation and uses thereof |
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2022
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220411590A1 (en) * | 2021-06-29 | 2022-12-29 | National Tsing Hua University | Nanonetwork with controlled chirality and manufacturing method thereof |
| US11827751B2 (en) * | 2021-06-29 | 2023-11-28 | National Tsing Hua University | Nanonetwork with controlled chirality and manufacturing method thereof |
| WO2024075126A1 (en) | 2022-10-06 | 2024-04-11 | Gigablue Ltd | Population of particles, method for preparation and uses thereof |
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