CN117069270A - Method for increasing carbon sink of water body and relieving eutrophication of water body - Google Patents
Method for increasing carbon sink of water body and relieving eutrophication of water body Download PDFInfo
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- CN117069270A CN117069270A CN202311047199.9A CN202311047199A CN117069270A CN 117069270 A CN117069270 A CN 117069270A CN 202311047199 A CN202311047199 A CN 202311047199A CN 117069270 A CN117069270 A CN 117069270A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 76
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 230000001965 increasing effect Effects 0.000 title claims abstract description 35
- 238000012851 eutrophication Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 20
- 241000195493 Cryptophyta Species 0.000 claims abstract description 53
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 41
- 239000011707 mineral Substances 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 35
- 229930002875 chlorophyll Natural products 0.000 claims abstract description 19
- 235000019804 chlorophyll Nutrition 0.000 claims abstract description 19
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 claims abstract description 19
- 150000002500 ions Chemical class 0.000 claims abstract description 10
- 230000000243 photosynthetic effect Effects 0.000 claims abstract description 10
- 238000007667 floating Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 8
- 239000013049 sediment Substances 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 7
- 241000192700 Cyanobacteria Species 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 125000005587 carbonate group Chemical group 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 7
- 229910052791 calcium Inorganic materials 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 3
- 230000029553 photosynthesis Effects 0.000 abstract description 3
- 238000010672 photosynthesis Methods 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 8
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- 235000011772 Acer rubrum var tomentosum Nutrition 0.000 description 3
- 235000009057 Acer rubrum var tridens Nutrition 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 241000195628 Chlorophyta Species 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
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- 150000003839 salts Chemical class 0.000 description 2
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- 238000011105 stabilization Methods 0.000 description 2
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- 239000003643 water by type Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 239000002344 surface layer Substances 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Biotechnology (AREA)
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Abstract
The invention discloses a method for increasing carbon sink of a water body and relieving eutrophication of the water body, which comprises the following steps: a. selecting eutrophic lakes in karst areas; b. the sediment traps and the water quality parameter recorder are arranged at the positions with different water depths; c. monitoring the pH value, DO value and EC value of the water body after the ballast mineral powder is sprinkled, and collecting the algae density, organic carbon content, chlorophyll and main ions of the water body after the ballast mineral powder is sprinkled; d. adjusting the adding amount of the ballast mineral powder according to the chlorophyll, the algae density and the algae species change condition of the water body. The addition of the ballast mineral powder forms aggregates of floating algae and mineral powder, quickly sinks, reduces organic carbon decomposition and accelerates carbon burying efficiency; meanwhile, the concentration of DIC is improved, the DIC promotes photosynthesis of aquatic photosynthetic organisms, the carbon sink quantity of water is increased, and the combination of Ca and P can achieve the purpose of P removal and alleviate water quality deterioration.
Description
Technical Field
The invention relates to the field of increasing carbon sink of water bodies, in particular to a method for increasing carbon sink of water bodies and relieving eutrophication of water bodies.
Background
CO 2 Emission reduction is a main measure for controlling greenhouse effect, and carbon fixation, carbon stabilization and regulation mechanisms are key problems of carbon circulation research. The carbonate weathering process driven by water circulation conceals huge carbon sink, and the carbonate weathering carbon sink mode of coupling aquatic photosynthesis combines inorganic and organic, DIC is converted into endogenous organic carbon (AOC) by biochar pumping effect (BCP) and buried in rivers, reservoir lakes and oceans, and finally enters rock circles to become long-term carbon sink. Related studies have shown that in waters with low primary productivity, the organic carbon is instead buried in amounts higher than in waters with high primary productivity.
At present, the known technology for increasing carbon sink of water body is as follows: by improving the DIC or CO2 concentration of the water body, the primary productivity of the water body is improved, and the carbon sink is increased. The decomposition rate of organic carbon of diatom particles is remarkably reduced by adding trace aluminum in the ocean, but aluminum is toxic, can bring potential water safety risks, and is not suitable for being added in water.
At present, the known technology for relieving the eutrophication of the water body is as follows: the eutrophication is improved mainly by controlling the input and concentration of nutrient salts N, P or by removing algae and heavy metals by adding a clay conforming to the modification. However, algae and heavy metals are removed by clay minerals, and are mainly used for treatment of mine sewage. Therefore, the purpose of the method is relatively single, and the method is relatively limited in application, whether the input of nutrient salt is controlled or modified clay is added.
In summary, the known technology can only singly consider increasing carbon sink of the water body or relieving eutrophication of the water body, and has low efficiency and slow effect.
Disclosure of Invention
Aiming at the problems, the method for increasing the carbon sink of the water body and relieving the win-win situation of the eutrophication of the water body is necessary to be provided, and the ballast minerals are added to increase the carbon sink of the water body and simultaneously relieve the eutrophication of the water body, so that the efficiency is high and the effect is quick.
The invention provides a method for increasing carbon sink of a water body and relieving eutrophication of the water body, which comprises the following steps:
a. selecting eutrophic lakes with different dissolved inorganic carbon contents in karst areas, and screening out lakes which have a certain number of floating algae in water bodies and have basic water chemistry parameters meeting preset conditions as objects for increasing carbon sink of the water bodies and relieving eutrophication of the water bodies;
b. installing sediment traps and water quality parameter recorders at different water depths, monitoring the pH value, D0 and EC value of the water body, collecting algae density, organic carbon content, chlorophyll and main ions of the water body, and scattering ballast mineral powder into a selected lake;
c. measuring the pH value, DO value and EC value of the water body after the ballast mineral powder is scattered, generating high-resolution change patterns of the pH value, DO value and EC value of the water body at different water depth positions, collecting samples, measuring the algae density, organic carbon content, chlorophyll and main ion concentration of the water body after the ballast mineral powder is scattered, and generating a sedimentation rate chart and a depth profile chart of the ballast effect;
d. according to the chlorophyll, the algae density and algae species change conditions of the water body, the adding amount of the ballast mineral powder is adjusted, harmful algae related to eutrophication in the water body are settled, the proportion of blue-green algae on the surface of the water body is reduced, the harmful algae and the added ballast mineral powder are promoted to form aggregates, the size of the aggregates is increased, the aggregates are settled to the bottom of a lake, the retention time of organic matters in the water body is reduced, and the degradation of the organic matters is reduced.
In a further technical scheme, in the step a, the method further comprises the following steps:
and (3) selecting lakes or reservoirs with different water depths in the karst region, measuring basic parameters of algae density, aquatic photosynthetic organism community structure, TOC, POC, chlorophyll, water depth and flow velocity, determining eutrophication condition and aquatic photosynthetic organism composition, and judging whether preset selection conditions are reached.
In a further embodiment, in step b, the ballasted mineral powder is carbonate powder from a karst area.
The beneficial effects of the invention are as follows:
1. by scattering ballast mineral powder into the eutrophic aquatic ecosystem, blue algae and mineral powder are gathered and quickly sink, so that decomposition is reduced, and the increase of organic carbon embedding capacity is realized.
2. The ballast minerals have high calcium content, are favorable for co-precipitation with P in the water body, form Ca-P, remove redundant P in the water body and relieve eutrophication.
3. By adding ballast minerals, a water body environment with high C/N, C/P is formed, the growth of submerged plants is facilitated, DIC is greatly utilized as a carbon source in the growth of the submerged plants, and the amount of endogenous organic carbon is further increased, so that carbon sequestration and water environment alleviation are realized.
Drawings
FIG. 1 is a flow chart of a method for increasing carbon sink and relieving eutrophication of a water body according to an embodiment of the present invention;
FIG. 2 is a detailed diagram of a method for increasing carbon sink and alleviating eutrophication of a water body according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the variation of the water chemistry, organic carbon, TN and TP of the added ballast minerals at different depths in the upper, middle and lower sections of a lake according to the embodiment of the invention;
FIG. 4 is a schematic diagram showing the variation of the ratio of the floating algae to the density at different depths in the upper, middle and lower sections of a lake after adding ballast minerals in the practice of the present invention;
FIG. 5 is a schematic diagram showing the variation of the depths of the floating algae species in the upper, middle and lower sections of a lake after adding ballast minerals according to the embodiment of the present invention;
FIG. 6 is a schematic diagram showing the variation of the floating deposition flux at different depths of the upper, middle and lower sections of a lake after adding ballast minerals according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples:
as shown in fig. 1-6, a method for increasing carbon sink and relieving eutrophication of a water body comprises the following steps:
a. selecting eutrophic lakes with different dissolved inorganic carbon contents in karst areas, and screening out lakes which have a certain number of floating algae in water bodies and have basic water chemistry parameters meeting preset conditions as objects for increasing carbon sink of the water bodies and relieving eutrophication of the water bodies;
two artificial shallow lake lotus ponds and small ponds with different dissolved inorganic carbon contents in the national field scientific observation research station of the Prukast ecosystem in Guizhou province are selected as objects for increasing water carbon sink and relieving eutrophication research, and carbonate rock powder scattering experiments of the lake and reservoir ballasting effect are carried out. Wherein the content of the dissolved inorganic carbon in the lotus pool is 0.9mmol/L, and the content of the dissolved inorganic carbon in the small pool is 3.3mmol/L.
b. Installing sediment traps and water quality parameter recorders at different water depths, monitoring the values of pH, DO and EC of the water body, collecting algae density, organic carbon content, chlorophyll and main ions of the water body, and scattering ballast mineral powder into a selected lake;
respectively selecting sediment traps and a water quality parameter recorder at water depths of 20cm, 50cm and 100cm, measuring values of pH, DO and EC of the water body at the upper section of the lake at the position of 20cm, and collecting algae density, organic carbon content, chlorophyll and main ions of the water body; measuring the pH value, DO value and EC value of the middle water body in the lake at 50cm, and collecting algae density, organic carbon content, chlorophyll and main ions of the water body; the pH value, DO value and EC value of the water body at the lower section of the lake are measured at the position of 100cm, and the algae density, the organic carbon content, chlorophyll and main ions of the water body are collected.
c. Measuring the pH value, DO value and EC value of the water body after the ballast mineral powder is scattered, generating high-resolution change patterns of the pH value, DO value and EC value of the water body at different water depth positions, collecting samples, measuring the algae density, organic carbon content, chlorophyll and main ion concentration of the water body after the ballast mineral powder is scattered, and generating a sedimentation rate chart and a depth profile chart of the ballast effect;
d. according to the chlorophyll, the algae density and algae species change conditions of the water body, the adding amount of the ballast mineral powder is adjusted, harmful algae related to eutrophication in the water body are settled, the proportion of blue-green algae on the surface of the water body is reduced, the harmful algae and the added ballast mineral powder are promoted to form aggregates, the size of the aggregates is increased, the aggregates are settled to the bottom of a lake, the retention time of organic matters in the water body is reduced, and the degradation of the organic matters is reduced.
The ballasting effect of minerals is mainly expressed in two ways:
1. adsorbing and aggregating organic molecules into an aggregate, so as to reduce the decomposition rate of organic matters in a water column;
2. increasing the density of the organic matters in the water body so as to increase the sedimentation rate, thereby increasing the sedimentation efficiency of the organic matters;
the ballasting effect adjusts the organic carbon pump efficiency because the ballasting action of the diagenetic particles increases the sinking rate of the agglomerates, thereby increasing the respiratory water depth of the organic matter as it is settled. The ballasting effect has important influence on the burying of the endogenous organic carbon in the reservoir, and has the effect of relieving the eutrophication of the reservoir and the lake. Eutrophication of water body is represented by algae structure mainly comprising blue algae. Although the explosive growth of blue algae can convert inorganic carbon into organic carbon, the blue algae has low density and slow sedimentation, most of blue algae can be decomposed in water columns, and a large amount of dissolved oxygen is consumed to deteriorate water quality. At the moment, by enhancing the ballasting effect, the blue algae cells in the water body are increased to gather and subside, so that the density of blue algae on the surface of the water body is effectively reduced, the decomposition of organic matters in the water is reduced, and the burial of organic carbon is increased.
The invention realizes carbon sequestration and eutrophication relief by adding ballast minerals. Aquatic photosynthetic organisms utilize DIC to form endogenous organic carbon and carbonate deposits, while increasing the density and sedimentation rate of particle aggregates by physical adsorption and mineral phase combination to enhance the burial of organics, achieving stabilization of karst carbon sink by ballasting effect while improving environmental effects. The ballasted minerals can effectively adsorb algae and dissolve organic carbon, quickly settle and reduce decomposition, and realize carbon sequestration; meanwhile, the ballast minerals have high calcium content, are favorable for co-precipitation with P in the water body, form Ca-P, remove redundant P in the water body and relieve eutrophication.
In a further technical scheme, in the step a, the method further comprises the following steps:
and (3) selecting lakes or reservoirs with different water depths in the karst region, measuring basic parameters of algae density, aquatic photosynthetic organism community structure, TOC, POC, chlorophyll, water depth and flow velocity, determining eutrophication condition and aquatic photosynthetic organism composition, and judging whether preset selection conditions are reached.
By the display of the endogenous organic carbon buried flux of the pridine reservoir and the red maple lake water reservoir in the earlier stage, the endogenous organic carbon buried flux is shown as 0.14+/-0.08 g C/m of the red maple lake, although the primary productivity of the red maple lake is the highest and the pridine reservoir is the lowest 2 The reservoir is 0.32+/-0.18 g C/m 2 And/d, mainly because of more ballast minerals entering the ordinary reservoir. In order to compare the influence of the ballasting effect in the carbon sequestration and eutrophication alleviation processes of the water body, two artificial shallow lake lotus ponds and small ponds with different dissolved inorganic carbon contents in a Guizhou Prime test field are selected as objects for increasing the carbon sequestration and alleviating the eutrophication of the water body, and before carbonate rock powder is scattered, the surface algae density, the aquatic photosynthetic organism community structure composition, TOC, POC, chlorophyll and water depth of the lotus ponds are tested, wherein the lotus ponds mainly comprise blue algae and green algae; the small pond is mainly composed of blue algae, green algae and diatom, and the density of algae on the surface layers of the two ponds is 895cells/m respectively 2 And 5622cells/m 2 The method comprises the steps of carrying out a first treatment on the surface of the TOC content is 14.74mg/L and 12.36mg/L respectively; POC content is 10.96mg/L and 10.69mg/L respectively; chlorophyll content was 5.44mg/L and 2.79mg/L, respectively. Preliminary results show that the inorganic carbon enrichment of DIC is increased, and surface water is found after the carbonate rock powder is addedIs removed; in the aspect of biological structural change, after the carbonate powder is added for 54 hours, the proportion of blue algae in surface water is reduced, and correspondingly, the proportion of blue algae in bottom water is improved, which means that blue algae eutrophication is partially relieved after the carbonate rock powder is added at least in a short period of time; the deposition flux in the high DIC environment was much higher than that in the low DIC environment in terms of organic carbon deposition flux, and the flux was 2-40 times that in the low DIC environment after 54 hours of powdering, indicating that the ballasting effect in the high DIC environment was remarkable.
In a further embodiment, in step b, the ballasted mineral powder is carbonate powder from a karst area.
In the embodiment, the ballasted minerals are utilized to increase carbon collection of water bodies and improve water quality, and the addition of the ballasted mineral powder enables floating algae such as blue-green algae to form aggregates with the mineral powder, so that the floating algae sink rapidly, the decomposition of organic carbon is reduced, and the carbon burying efficiency is accelerated; meanwhile, the concentration of DIC can be increased, the photosynthesis of aquatic photosynthetic organisms can be promoted, the carbon sink quantity of water is increased, and the combination of Ca and P can achieve the purpose of P removal and alleviate water quality deterioration.
The foregoing examples merely illustrate specific embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (3)
1. A method for increasing carbon sink and relieving eutrophication of a water body, comprising the steps of:
a. selecting eutrophic lakes with different dissolved inorganic carbon contents in karst areas, and screening out lakes which have a certain number of floating algae in water bodies and have basic water chemistry parameters meeting preset conditions as objects for increasing carbon sink of the water bodies and relieving eutrophication of the water bodies;
b. installing sediment traps and water quality parameter recorders at different water depths, monitoring the values of pH, DO and EC of the water body, collecting algae density, organic carbon content, chlorophyll and main ions of the water body, and scattering ballast mineral powder into a selected lake;
c. measuring the pH value, DO value and EC value of the water body after the ballast mineral powder is scattered, generating high-resolution change patterns of the pH value, DO value and EC value of the water body at different water depth positions, collecting samples, measuring the algae density, organic carbon content, chlorophyll and main ion concentration of the water body after the ballast mineral powder is scattered, and generating a sedimentation rate chart and a depth profile chart of the ballast effect;
d. according to the chlorophyll, the algae density and algae species change conditions of the water body, the adding amount of the ballast mineral powder is adjusted, harmful algae related to eutrophication in the water body are settled, the proportion of blue-green algae on the surface of the water body is reduced, the harmful algae and the added ballast mineral powder are promoted to form aggregates, the size of the aggregates is increased, the aggregates are settled to the bottom of a lake, the retention time of organic matters in the water body is reduced, and the degradation of the organic matters is reduced.
2. The method for increasing carbon sink and alleviating water eutrophication according to claim 1, wherein in step a, the method further comprises the steps of:
and (3) selecting lakes or reservoirs with different water depths in the karst region, measuring basic parameters of algae density, aquatic photosynthetic organism community structure, TOC, POC, chlorophyll, water depth and flow velocity, determining eutrophication condition and aquatic photosynthetic organism composition, and judging whether preset selection conditions are reached.
3. A method of increasing carbon sink and moderating eutrophication of a body of water according to claim 2, wherein in step b the ballasted mineral powder is carbonate powder from karst areas.
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