CN114890831A - Preparation method of modified biochar for immobilizing soil anion nutrient salt - Google Patents
Preparation method of modified biochar for immobilizing soil anion nutrient salt Download PDFInfo
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- CN114890831A CN114890831A CN202210294337.2A CN202210294337A CN114890831A CN 114890831 A CN114890831 A CN 114890831A CN 202210294337 A CN202210294337 A CN 202210294337A CN 114890831 A CN114890831 A CN 114890831A
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- 239000002689 soil Substances 0.000 title claims abstract description 49
- 235000015097 nutrients Nutrition 0.000 title claims abstract description 25
- 150000003839 salts Chemical class 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 150000001450 anions Chemical class 0.000 title claims abstract description 18
- 230000003100 immobilizing effect Effects 0.000 title description 3
- 239000011575 calcium Substances 0.000 claims abstract description 16
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 16
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 13
- 239000010902 straw Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000000197 pyrolysis Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract 2
- 125000000129 anionic group Chemical group 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 12
- 239000011574 phosphorus Substances 0.000 abstract description 12
- 238000002386 leaching Methods 0.000 abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 11
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000005067 remediation Methods 0.000 abstract 1
- 238000003900 soil pollution Methods 0.000 abstract 1
- 238000003911 water pollution Methods 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 description 5
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 238000012851 eutrophication Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 241000586290 Suaeda salsa Species 0.000 description 1
- WQHONKDTTOGZPR-UHFFFAOYSA-N [O-2].[O-2].[Mn+2].[Fe+2] Chemical compound [O-2].[O-2].[Mn+2].[Fe+2] WQHONKDTTOGZPR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000002420 orchard Substances 0.000 description 1
- 239000002686 phosphate fertilizer Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides a preparation method of modified biochar for fixing soil anion nutrient salt, which is characterized in that reed straws and shell powder are used as raw materials, and a calcium-loaded biochar sample is prepared in a co-pyrolysis mode. The prepared modified biochar can adsorb anions through electrostatic attraction in a wider pH range, so that the effect of fixing soil anion nutrient salts is achieved. The calcium-modified biochar prepared by the method is beneficial to enhancing the holding capacity of soil on nitrogen and phosphorus, reducing the risk of leaching loss of nitrogen and phosphorus with water, and has great application potential in the aspects of soil carbon fixation, soil and water pollution remediation, holding of soil anion nutrient salt and the like.
Description
Technical Field
The invention relates to the field of biochar preparation, in particular to a preparation method of modified biochar for fixing soil anion nutrient salt. The calcium modified biochar prepared by the method can adsorb anions through electrostatic attraction in a wider pH range, so that the effect of fixing soil anion nutrient salts is achieved.
Background
The capability of the soil to retain nitrogen and phosphorus refers to the capability of the soil to retain the nitrogen and phosphorus and reduce the loss of the nitrogen and phosphorus. Nitrogen and phosphorus are nutrients necessary for normal growth of plants, but nitrate nitrogen and phosphate are ions which are very easy to dissolve in water and are easy to run off along with the processes of precipitation, irrigation and the like, so that the eutrophication pollution risk of a water body is aggravated. The coastal estuary area is an important 'sink' of land source nitrogen and phosphorus and is also an important barrier for preventing eutrophication pollution of the ocean water body. However, due to excessive interference of human activities and the like on the coastal estuary area, the soil quality degradation research of the area is caused, and the function of nitrogen and phosphorus "sink" is gradually weakened.
With the development of research and application of biochar, more and more nitrogen and phosphorus pollution control starts to depend on good adsorption performance of the biochar. For example: CN109534432A discloses a method for preparing shell biochar loaded with iron-manganese oxide, but the method has the disadvantages of complicated steps and long preparation time; CN113941314A discloses a preparation method of seawater modified biochar for adsorbing phosphorus in a water body, and the preparation method is complex in preparation process, so that the preparation cost of the modified biochar is high, and the popularization and application of the product are influenced. In water environments such as rivers, lakes and the like, calcium phosphate is a form which is difficult to be utilized by microorganisms, and calcium modified biochar can adsorb anions through electrostatic attraction in a wider pH range, so that the effect of retaining soil anion nutritive salt is achieved. Therefore, the research and development of the calcium modified biochar with strong adsorption capacity, simple manufacturing process and low cost becomes an important way for reducing water eutrophication caused by runoff or leaching and reducing the leaching problem of nitrate nitrogen and phosphate in soil.
According to the research, reed straws and shell powder are mixed according to a certain proportion and put into a muffle furnace, and calcium modified biochar is prepared through high-temperature pyrolysis, so that the effects of reducing leaching loss of nitrate nitrogen and phosphate in soil and fixing soil anion nutrient salt are achieved.
Disclosure of Invention
The invention provides a preparation method of modified biochar for retaining soil anionic nutrient salt, which is used for enhancing the retaining capability of soil on nitrogen and phosphorus and reducing the risk of leaching of nitrogen and phosphorus along with water.
The invention relates to a preparation method of modified biochar for immobilizing soil anion nutrient salt, which adopts the following technical scheme:
mixing reed straws and shell powder according to a certain proportion, putting the mixture into a muffle furnace for high-temperature pyrolysis to obtain the calcium modified biochar.
A preparation method of modified biochar for retaining soil anionic nutrient salts comprises the following steps:
(1) washing reed straw with distilled water, drying at 105 deg.C for 24 hr, crushing, and sieving with 10 mesh sieve.
(2) Mixing reed straw and shell powder in a mass ratio of 5: 2.56.
(3) Transferring the mixed sample obtained in the step (2) into a muffle furnace, and performing reaction on the mixed sample in N 2 Pyrolyzing at 900 deg.C for 2h, N 2 The flow rate is stabilized at 200 plus or minus 20ml min -1 Finally obtaining the calcium modified biochar.
The calcium modified biochar used in the invention can be synthesized in a large scale and the synthesis method is simple. The calcium modified biochar prepared by the method can enhance the holding capacity of soil to nitrate nitrogen and phosphate. The invention has simple preparation process, does not need expensive equipment, and has bright prospect in large-scale application of improving soil nutrients and fixing soil anion nutrient salt.
Drawings
Fig. 1 is a process diagram of the production of calcium modified biochar holding soil anionic nutrient salts.
FIG. 2 is a schematic of a laboratory scale soil cultivation/leaching process.
Fig. 3 is SEM, XRD and FTIR images of calcium-modified biochar holding soil anionic nutrient salts.
FIG. 4 is a graph showing the effect of calcium-modified biochar on the leaching behavior of nitrate nitrogen and phosphate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
The invention relates to modified biochar for fixing soil anionic nutrient salt.
The invention provides a preparation method of modified biochar for fixing soil anion nutrient salt, which comprises the following steps:
(1) Washing reed straw with distilled water, drying at 105 deg.C for 24 hr, crushing, and sieving with 10 mesh sieve.
(2) Mixing reed straw and shell powder in a mass ratio of 5: 2.56.
(3) Transferring the mixed sample obtained in the step (2) into a muffle furnace, and performing reaction on the mixed sample in N 2 Pyrolyzing at 900 deg.C for 2h, N 2 The flow is stabilized at 200 +/-20 ml min -1 Finally obtaining the calcium modified biochar.
The present invention will be described in detail with reference to specific examples.
The first embodiment is as follows: two representative soils with significant differences in soil texture were collected: one of the suaeda salsa wetland is collected at a distance of about 1km from the sea; and the other soil is collected in an orchard around the wetland. The device used in the soil culture/leaching experiment is a self-made organic glass leaching column with the inner diameter of 5cm and the height of 50cm, a water outlet arranged at the bottom and an opening at the upper end, and each leaching column is sequentially filled with 3 pieces of filter paper, 3cm of quartz sand, 20cm of wetland soil and 3cm of quartz sand from bottom to top. The amount of nitrogenous fertilizer and phosphate fertilizer is also 0.74g KNO 3 /0.12gKH 2 PO 4 Column -1 (corresponding to 102mg N/28.0mg P column -1 ) The ratio of (a) to (b) is added to the cultured soil. And (3) during the soil leaching experiment, measuring related indexes regularly.
Example two: the specific operation steps and operation conditions of the second embodiment are the same as those of the first embodiment, except that 20cm of wetland soil is replaced by a 20cm of wetland soil-biochar mixture.
Example three: the concrete operation steps and operation conditions of the third embodiment are the same as those of the third embodiment, and the difference is that 20cm of wetland soil is replaced by 20cm of wetland soil-calcium modified biochar mixture.
Example four: the concrete operation steps and operation conditions of the fourth embodiment are consistent with those of the fourth embodiment, and the difference is that 20cm of wetland soil is replaced by 20cm of farmland soil.
Example five: the concrete operation steps and operation conditions of the fifth embodiment are the same as those of the fourth embodiment, except that 20cm farmland soil is changed into 20cm farmland soil-biochar mixture.
Example six: the specific operation steps and operation conditions of the sixth embodiment are the same as those of the fourth embodiment, except that 20cm farmland soil is changed into 20cm farmland soil-calcium modified biochar mixture.
It should be understood that while the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein, and any combination of the various embodiments may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (6)
1. A preparation method of modified biochar for fixing soil anion nutrient salt is characterized by comprising the following steps: mixing reed straws and shell powder according to a certain proportion, putting the mixture into a muffle furnace for pyrolysis, and obtaining the calcium modified biochar. The biochar can adsorb anions through electrostatic attraction in a wider pH range, so that the effect of fixing soil anion nutrient salts is achieved.
2. The preparation method of the modified biochar for retaining soil anionic nutrient salt as claimed in claim 1, wherein the modified biochar is characterized in that: the raw materials for preparing the biochar consist of reed straws and shells.
3. According toThe preparation method of the modified biochar for retaining the soil anionic nutrient salt, which is described in claim 1, is characterized in that: mixing reed straw and shell powder in a certain proportion, and placing the mixture in a muffle furnace to obtain the invented product 2 Pyrolyzing for 2h at 900 ℃ under the environment.
4. The modified biochar holding soil anionic nutrient salts as claimed in claim 1, wherein: the mass ratio of the reed straw to the shell powder is 5: 2.56.
5. The modified biochar holding soil anionic nutrient salts as claimed in claim 1, wherein: the specific surface area of the calcium modified biochar is 153m 2 g -1 Total pore volume of 0.1cm 3 g -1 The average pore diameter was 5.0 nm.
6. The method for preparing modified biochar retaining soil anionic nutrient salts according to any one of claims 1-5, wherein the method comprises the following steps: the preparation method comprises the following steps:
(1) washing reed straw with distilled water, drying at 105 deg.C for 24 hr, crushing, and sieving with 10 mesh sieve.
(2) Mixing reed straw and shell powder in a mass ratio of 5: 2.56.
(3) Transferring the mixed sample obtained in the step (2) into a muffle furnace in N 2 Pyrolyzing at 900 deg.C for 2h, N 2 The flow is stabilized at 200 +/-20 ml min -1 Finally obtaining the calcium modified biochar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210294337.2A CN114890831A (en) | 2022-03-19 | 2022-03-19 | Preparation method of modified biochar for immobilizing soil anion nutrient salt |
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| CN202210294337.2A CN114890831A (en) | 2022-03-19 | 2022-03-19 | Preparation method of modified biochar for immobilizing soil anion nutrient salt |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536704A (en) * | 2016-01-11 | 2016-05-04 | 湖南大学 | Calcium modified biochar and preparation method and application thereof |
| CN109534432A (en) * | 2018-12-17 | 2019-03-29 | 长江水利委员会长江科学院 | The preparation method of the biological carbon modified material of phosphorus in a kind of removal eutrophication water |
| CN110075797A (en) * | 2019-05-06 | 2019-08-02 | 山东省农业科学院家禽研究所 | A method of biological carbon adsorbent is prepared using reed, chicken manure as raw material |
| CN111468078A (en) * | 2020-04-16 | 2020-07-31 | 郑州航空工业管理学院 | Reed stem biochar composite material and application thereof in remediation of cadmium-polluted soil |
-
2022
- 2022-03-19 CN CN202210294337.2A patent/CN114890831A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536704A (en) * | 2016-01-11 | 2016-05-04 | 湖南大学 | Calcium modified biochar and preparation method and application thereof |
| CN109534432A (en) * | 2018-12-17 | 2019-03-29 | 长江水利委员会长江科学院 | The preparation method of the biological carbon modified material of phosphorus in a kind of removal eutrophication water |
| CN110075797A (en) * | 2019-05-06 | 2019-08-02 | 山东省农业科学院家禽研究所 | A method of biological carbon adsorbent is prepared using reed, chicken manure as raw material |
| CN111468078A (en) * | 2020-04-16 | 2020-07-31 | 郑州航空工业管理学院 | Reed stem biochar composite material and application thereof in remediation of cadmium-polluted soil |
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