CN106006814A - Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof - Google Patents
Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof Download PDFInfo
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Abstract
The invention relates to a sediment/zeolite nitrogen control material prepared from lake sediment, a method and application thereof. The method includes: collecting lake sediment as the raw material, conducting freeze drying, grinding and sieving to obtain sediment powder for standby use; taking zeolite, conducting grinding and sieving to obtain zeolite powder for standby use; then subjecting the treated sediment powder to constant temperature heating treatment, and then performing cooling for standby use; adding the zeolite powder into the sediment powder in proportion, mixing the substances evenly, then adding water to infiltrate the mixed raw materials, carrying out extrusion molding and roasting so as to obtain the sediment/zeolite nitrogen control material. The method provided by the invention adopts lake sediment as the raw material, and combines zeolite, so that the sediment/zeolite nitrogen control material has significantly improved ammonia nitrogen adsorption performance and significantly decreased ammonia nitrogen desorption capacity. The raw materials are cheap, the safety is high, the social and economical benefits are good, also the material has no ecological risk to lake water, is energy saving and environment-friendly, and can significantly reduce the ammonia nitrogen concentration of sediment interstitial water in the application process to achieve the purpose of impeded control of lake sediment ammonia nitrogen release.
Description
Technical field
The invention belongs to bottom mud in lake pollution control technology field, be specifically related to one and utilize bottom mud in lake system
Standby deposit/zeolite control nitrogen material and method, application.
Background technology
Ammonia nitrogen is the important pollutant in water body, essentially from various industrial wastewaters and urban life effluent sewage
Deng.Ammonia-nitrogen content in water body exceeds standard, and can cause body eutrophication, produces aquatile and poisons
Effect, causes black and odorous water, makes quality of water environment deteriorate, and increases degree of difficulty and the cost of Water purification,
Thus affect human health.Deposit is also called bed mud, is to enter the pollution of water such as river, lake
The important home to return to of thing and accumulation storehouse, be again the endogenous of overlying water pollution.Particularly pollute when external source and had
After effect controls or is truncated completely, deposit can become the important next of surface water body overlying water pollutant
Source.It is the important next of eutrophic lake overlying water nitrogen owing to deposit discharges nitrogen, particularly ammonia nitrogen release
Source, therefore the resistance control to the release of nutrition enriched shallow lake deposit ammonia nitrogen is particularly important.
The processing method of ammonia nitrogen waste water mainly has blow-off method, break point chlorination, ion exchange etc. to pass at present
System processing method, and for the ammonia nitrogen research in eutrophic lake water/sediment interface release resistance prosecutor face
Less.Existing in-situ treatment technology is broadly divided into for nutrition enriched shallow lake deposit treatment technology
With dystopy treatment technology two kinds.Dystopy processes mainly Sediment Dredging engineering；In-situ treatment can be divided into physics,
Chemistry and biologic treating technique.Wherein, physical processing techniques mainly has covering and artificial aeration in situ；Change
Learn treatment technology and be mainly chemical passivation technology and chemical enhancement；Biologic treating technique mainly have animals and plants,
Microorganism and restoration of the ecosystem treatment technology.It is to excavate contaminated deposit to be sent to other place that dystopy processes
Processing, dystopy processes predominantly technology for environmental dredging, but, when the measure taked in dredging work
Improper, it will to have serious consequences, as improper in dredging depth control, deep layer pollutant can discharge into water
Body, breaks original nitrogen, phosphorus dissolution equilibrium, and after causing dredging, bed mud is chronically at release conditions, simultaneously
Dredging Process can affect original aquatic ecosystem in Water Environment In Lakes, destroys benthic existence ring
Border, affects the recovery of lake ecosystem, and dredges and need high capital, and control expense is sufficiently expensive.
In-situ treatment technology situ soverlay technique, also known as closing, macking technique, is on marine sediments surface
Place one layer of cleaning covering, thus stop a kind of method that pollutants in sediments discharges to water body, but its
There is also many deficiencies:
(1) cover material and need to clean the materials such as silt in a large number, originate more difficult；
(2) when covering, its uniformity is difficult to ensure that, adds and can increase bed mud thickness, reduces water depth；
(3) in water body flow waters faster, covering material easily by naughty erosion, dwelt life in the end by soverlay technique simultaneously
State system also has certain destructiveness.
In in-situ treatment technology, chemical treatment method is by using chemical reagent to pollutant in deposit
Play fixation.But, use chemical reagent can there is the problem that Chemical lab management safety is poor, to water
In body, biotic influence is relatively big, and the public is difficult to accept, and easily causes the secondary pollution of water body.
In in-situ treatment technology, biologic treating technique is to utilize organism, by add plant, animal,
Microorganism is degraded deposit, pollutant, eliminates or reduces its toxicity, in recent years, study both at home and abroad
Person, by the artificial ecosystem (such as artificial floating island, artificial swamp etc.) building simulation, by microorganism, plants
Thing, the repair of animal are unified mutually, form the bioremediation technology of compartmentalization, and it is real to be applied to engineering
In trampling, achieve good environmental benefit, ecological benefits and economic benefit, but, ecological reestablishment
Cycle is longer, in a short time DeGrain.Owing to lake sediment-water interface is a complex environment,
Its environmental condition slight change, the Nutrient release risk such as nitrogen, phosphorus can be the biggest.Ask for this in the world
Topic, attempts utilizing adsorption technology to control the release of nutrition enriched shallow lake water/sediment interface ammonia nitrogen, because
Adsorption technology possess simple to operate, rapidly and efficiently, the advantage such as non-secondary pollution and the repeatable utilization of adsorbent.
The water/sediment interface ammonia nitrogen absorption material of main employing is: active bio charcoal, phosphorus
Lime stone, organic clay, natural and modified zeolite and calcite etc..Wherein, zeolite has bigger ratio because of it
Surface area and cation exchange capacity (CEC), demonstrate good ammonia nitrogen absorption performance.Such as Chinese patent literature
The in-situ remediation method of a kind of pollution of water bed mud disclosed in CN102674646, by by nitrate
Inject bed mud and utilize the organic pollution in nitrate removal bed mud, and suppress the release of phosphorus, then by activity
Covering material and be added in bed mud-water termination be formed one layer of active cover layer system, activity covers in material and wraps
Include natural zeolite or the zeolite of cationic surfactant modification, utilize described activity cover layer system to control
The ammonia nitrogen discharged in bed mud, and stop the migration to overlying water of nitrate in pore water and prevent
Cover the pollution of the nitrate of water.Can be realized the surface water body bed mud such as Hu Bo, river by such scheme
In-situ immobilization, controls the organic release such as Nitrogen In Sediment, phosphorus.But, such scheme there is also as follows
Many deficiencies: 1, modified zeolite need in modifying process use cationic surfactant, due to sun from
Sub-surface activating agent price comparison is high, substantially increases and is using modified zeolite to pollution of water bed mud
The cost of in-situ immobilization；2, zeolite carries out modified needing distilled water in cationic surfactant mixing
Cleaning, when cleaning thorough, the possible interim storage of partial cation surfactant is at the vestibule of zeolite
In, when this modified zeolite is for the in-situ immobilization of surface water body, unadsorbed cation form in zeolite
Face activating agent can be discharged in overlying water, causes the secondary pollution of water body；3, due in this in-situ method
Chemical reagent nitrate has been arrived in use, enters the ratio in overlying water to reduce the nitrate nitrogen of nitrate,
It is added to bed mud-hydrosphere with the modified zeolite of geotextiles parcel or the mixture of modified zeolite and natural zeolite
Face, but even if the ratio in reducing the nitrate nitrogen entrance overlying water reducing nitrate, it is still and cannot keep away
Exempting from nitrate to enter in overlying water, cause the pollution of water body, ecological security is poor, and uses soil
It is comparatively laborious that the modified zeolite of work cloth parcel covers bed mud, bigger for geotextiles demand, Er Qiexu
Periodic replacement, improves rehabilitation cost；4, in this in-situ remediation method, nitrate adds the main of bed mud
Effect is degraded and goes removal organic polluter and the migration of suppression sedimentary phosphate, for absorption and the control of ammonia nitrogen
Release that rely primarily on is the mixture of modified zeolite or modified zeolite and natural zeolite, however modified zeolite and
The ammonia nitrogen absorption amount of natural zeolite is limited, if in order to improve ammonia nitrogen absorption and controlled release, need to improve modified zeolite
Or the usage amount of the mixture of modified zeolite and natural zeolite, it is greatly improved cost.From the foregoing,
Water/sediment interface ammonia control field, does not find suitable, cheap, green and ecological safety
Property high ammonia nitrogen absorption controlled-release material.How to find suitable ammonia nitrogen absorption controlled-release material to change deposition
The micro environment of thing-water termination, thus control deposit endogenous pollution load, in order to the water body later stage is ecological
Reparation is an emphasis of research.
At " Taihu Lake Sediment nitrogen phosphorus adsorption/desorption feature analysis " (Jiang Xia, Wang Qiujuan, Wang Shuhang etc., ring
Border science, 2011, (05), and 1285-1291) middle disclosure, Taihu Lake Sediment ammonia nitrogen average adsorption amount is
23.55mg/kg, in seriously polluted region, adsorbance is bigger, it is seen then that ammonia nitrogen is had necessarily by lake sediment
Absorbability.But, owing to lake sediment is affected by multiple environmental factors, with seasonal variety
Nutrient is existed the process of source-sink transition, specifically can be found in " Taihu Lake Sediment-water termination source of students want
Element migration mechanism and the spatial diversity of quantification 1. ammonium nitrogen rate of release and source-Correspondent amount " (Fan Chengxin,
Zhang Lu, Qin uncle is strong, lake science, and 2004, (01), 10-20).Due to the source-sink transition mistake to deposit
Journey is difficult to control to, and causes using deposit to there is risk as ammonia nitrogen absorption controlled-release material, easily aggravates water
The pollution of body, causes the secondary pollution of water body, and ecological security is poor, therefore comes about with lake sediment
Prepare ammonia nitrogen adsorbent pertinent literature report the most few.As prior art relates to prepare with deposit
Adsorbent is not used to absorption and the controlled release of ammonia nitrogen in waste water, but for heavy metal ions in wastewater
Absorption, discloses a kind of Sediments of Dian Chi Lake in Chinese patent literature CN104437374A and prepares adsorbent
Method and application, by bed mud distilled water immersion, repeat washing by soaking and dry, adding glutaraldehyde activated
The chemical reagent such as agent, then carry out being acidified, carbonization, washing the adsorbent of drying, it is heavy to make use of
The advantages such as the absorption property of long-pending thing is strong, cheap and energy-conserving and environment-protective, greatly reduce cost, and obtain and show
The adsorption effect write.But the adsorbent using bed mud to prepare in such scheme is only for Adsorption of Heavy Metals
Ion, not mentioning this adsorbent can adsorb the ammonia nitrogen in the lake of eutrophication or river
And control, it is seen that the adsorbent prepared even with deposit has inexpensively, absorption property strong and energy-saving ring
The advantages such as guarantor, but due to deposit, to prepare ammonia nitrogen absorption and controlled-release material risk big, in prior art also
Do not occur the ammonia nitrogen control nitrogen material prepared with deposit for raw material.To this end, the invention provides one
Utilize deposit/zeolite control nitrogen material and method, application prepared by bottom mud in lake, reach " treatment of wastes with processes of wastes against one another "
Purpose, reduces cost, and the control nitrogen material safety prepared is high, for absorption and the control of ammonia nitrogen
Effect is excellent, does not has any ecological risk to water body in lake.
Summary of the invention
The technical problem to be solved is that in prior art, ammonia nitrogen controlled-release material is to ammonia nitrogen absorption amount
Apply DeGrain the most by force, especially in the release resistance control of water/sediment interface nitrogen, and cost is high, life
State poor stability, economic and social benefits are low, and then provide a kind of higher to ammonia nitrogen absorption ability, the most heavy
Long-pending thing-water termination ammonia nitrogen release resistance control effect is more preferable, and inexpensively, environmental protection and the high profit of ecological security
Deposit/zeolite control the nitrogen material prepared with bottom mud in lake and method, application.
To this end, a kind of side utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material that the present invention provides
Method, comprises the steps:
(1) gathering bottom mud in lake, freeze-dried, grinding is sieved, and obtains deposit powder body, standby；
(2) taking zeolite, grinding is sieved, and obtains zeolite powder body, standby；
(3) take step (1) to process the described deposit powder body that obtains and carry out heated at constant temperature process, then
Cooling, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into step (2) to process
The described zeolite powder body obtained, mix homogeneously, standby；
(5) in step (4), the raw material of mixing adds water infiltration, extruded, then carry out roasting,
Obtain described deposit/zeolite control nitrogen material.
In described step (4), described zeolite powder body accounts for the 10-90% of the gross mass of mixed raw material.
Preferably, in described step (4), described zeolite powder body accounts for the gross mass of mixed raw material
40-70%.
It is furthermore preferred that described zeolite powder body accounts for the 40% of the gross mass of mixed raw material.
In described step (3), the temperature of described heated at constant temperature is 100-800 DEG C.
Preferably, in described step (3), the temperature of described heated at constant temperature is 400-600 DEG C.
It is furthermore preferred that the temperature of described heated at constant temperature is 600 DEG C.
In described step (3), the time that described heated at constant temperature processes is 1-3 hour.Preferably, described
Heating treatment time is 3 hours.
In described step (5), the raw material of described mixing carries out the temperature of roasting and is 500-700 DEG C, described
The time of roasting is 1-3h.
Preferably, it is 600 DEG C that the raw material of described mixing carries out the temperature of roasting, and the time of described roasting is
2h。
In described step (1), described bottom mud in lake ground 50-150 mesh sieve.Preferably, described lake
Pool ground 100 mesh sieves of bed mud.
In described step (2), described zeolite ground 50-150 mesh sieve.Preferably, described zeolite grinds
Honed 100 mesh sieves.
In described step (5), being shaped as of described deposit/zeolite control nitrogen material is spherical, lamellar,
Bulk or cellular.Preferably, being shaped as of described deposit/zeolite control nitrogen material is spherical, a diameter of
3-10mm。
The water yield of described addition is the 10%-50% of the weight of the raw material of described mixing, it is preferred that described addition
The 10%-15% of weight of the raw material that the water yield is described mixing.
Described bottom mud in lake includes SiO2、Al203、Fe2O3、CaO、MgO、K2O and/or TiO2One-tenth
Point.
Preferably, the SiO in described bottom mud in lake2Content is 20-25%, Al203Content is 40-50%, Fe2O3
Content is 20-25%, and CaO content is 3-8%, and content of MgO is 1-4%, K2O content is 0.1-1%, TiO2
Content is 1-3%.
It is furthermore preferred that the SiO in described bottom mud in lake2Content is 22.92%, Al203Content is 44.56%,
Fe2O3Content is 22.01%, and CaO content is 5.13%, and content of MgO is 2.81%, K2O content is 0.46%,
TiO2Content is 2.11%.
The loss on ignition of described bottom mud in lake is 28-32%.Preferably, the loss on ignition of described bottom mud in lake is
30.43%.
Preferably, described bottom mud in lake is Phosphorus in Sediment of Dianchi Lake.
Present invention also offers a kind of deposit/zeolite control nitrogen material prepared by described method to exist
The application of preparation ammonia nitrogen absorption Material Field.Described ammonia nitrogen absorption material is the release of lake sediment ammonia nitrogen
Resistance control material.
The technique scheme of the present invention has the advantage that compared to existing technology
(1) a kind of side utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention
Method, is raw material by gathering bottom mud in lake, and freeze-dried, grinding is sieved, it is thus achieved that deposit powder body,
Standby；Taking zeolite, grinding is sieved, and obtains zeolite powder body, standby；Then the described deposition after process is taken
Powder carries out heated at constant temperature process, cooling；Zeolite powder body it is mixed in proportion in described deposit, mixed
Close uniformly；Then in mixed raw material, water infiltration is added, extruded, then carry out roasting, to obtain final product
Described deposit/zeolite control nitrogen material；By with bottom mud in lake as raw material, heat treatment, then to it
Middle addition zeolitic material, is mixed in proportion with zeolite by the deposit after heat treatment, the most infiltrated,
Deposit/zeolite control nitrogen material prepared by extruded and roasting is in the lake of absorption eutrophication or river
Ammonia nitrogen aspect effect in sediment interstitial water is notable so that deposit is to ammonia nitrogen absorption performance and zeolite
Absorption property for ammonia nitrogen combines, and greatly improves the absorption to ammonia nitrogen, it is thus achieved that unforeseeable
Effect, and this deposit/zeolite control nitrogen material safety is high, does not has any ecological risk to water body in lake,
Reach " treatment of wastes with processes of wastes against one another " purpose, energy-conserving and environment-protective, and due to the interpolation of deposit, reduce the use of zeolite
Amount, greatly reduces cost, therefore, solves the ammonia nitrogen absorption of ammonia nitrogen controlled-release material of the prior art
Amount is not strong, cost is high and the problem of ecological security difference；
(2) a kind of side utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention
Method, is 10-90% by controlling zeolite shared mass percent in control nitrogen material, optimizes with this described
Control nitrogen material specific surface area, total pore volume, CEC content, thus improve the ammonia nitrogen absorption of described control nitrogen material
Can, reduce the ammonia nitrogen absorption of material-desorbing equilibrium concentration own, and then reach bottom mud in lake ammonia nitrogen is discharged
Resistance control effect；
(3) a kind of side utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention
Method, by zeolite shared mass percent in control nitrogen material is adjusted to 30%-50% further, can
Ensure the specific surface area of described control nitrogen material, total pore volume, CEC content, and avoid deposit content mistake
Height, blocking zeolite cavity and cavity, it is suppressed that the cation exchange capacity (CEC) of zeolite, the most to a certain degree
On reduce a part of absorbability that zeolite is produced, the control nitrogen prepared by electrostatic force and dispersion force
Material reaches maximum for the adsorbance of ammonia nitrogen in waste water；
(4) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
It is 100-800 DEG C by the heat treatment temperature controlling described deposit powder body, improves the deposit suction to ammonia nitrogen
Attached amount, reduces the adsorption-desorption equilibrium concentration of deposit；
(5) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
By further the heat treatment temperature of described deposit powder body being adjusted to 400-600 DEG C, not only significantly improve
The described control nitrogen material of the preparation adsorbance to ammonia nitrogen, the absorption-desorption balance reducing material itself is dense
Degree, but also avoid owing to temperature is too high, cause this control nitrogen material internal structure to be destroyed,
Affect the described control nitrogen material absorption property to ammonia nitrogen, and by controlling described deposit heat treatment
Temperature so that the service life of described deposit/zeolite control nitrogen material extends, it is possible to life-time service, and still
So keep good ammonia nitrogen release resistance control effect；
(6) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
It it it is 1-3 hour by controlling the time of heat treatment, it is ensured that the control nitrogen material suction to ammonia nitrogen prepared
Attached amount is big, and desorption quantity is minimum；
(7) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
By mixed raw material in step (4) is added water infiltration molding, then carry out high-temperature roasting so that system
Standby described control nitrogen material is further enhanced for the adsorbance of ammonia nitrogen, is removed in material by roasting
The impurity in portion, increases the zeolite in specific surface area, especially mixing raw material, makes control nitrogen material to ammonia nitrogen
Adsorbance improves further；
(8) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
By in described step (5), control the raw material of described mixing and carry out the temperature of roasting and be 500-700 DEG C,
Not only significantly improve the described control nitrogen material of the preparation adsorbance to ammonia nitrogen, reduce the absorption of material itself-
Desorbing equilibrium concentration, and the temperature of roasting is carried out by the raw material controlling that deposit and zeolite are mixed,
The service life making described deposit/zeolite control nitrogen material extends, it is possible to life-time service, and remains in that
Good ammonia nitrogen release resistance control effect；
(9) a kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material of the present invention,
Described deposit/zeolite control nitrogen material be shaped as spherical, lamellar or cellular, advantageously in described
The control nitrogen material absorption to ammonia nitrogen；
(10) a kind of deposit/zeolite control nitrogen material utilizing bottom mud in lake to prepare of the present invention, by
In it, ammonia nitrogen had significant absorption property, and it is less to control nitrogen material ammonia nitrogen desorption quantity so that it is be permissible
It is widely used in preparing ammonia nitrogen absorption Material Field, especially can be efficiently applied to lake sediment-water interface ammonia
Nitrogen release resistance control technical field, administers lake pollution bottom sediment and eutrophication prevention and control aspect has higher
Application and popularization value.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, being embodied as below according to the present invention
Example also combines accompanying drawing, and the present invention is further detailed explanation, wherein
Fig. 1 is that the described deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention is to low concentration
Ammonia nitrogen absorption isollaothermic chart；
Fig. 2 is that the described deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention is to high concentration
Ammonia nitrogen absorption isollaothermic chart；
Fig. 3 is the described deposit/zeolite control nitrogen material adsorption isotherm of different ratio in experimental example of the present invention
Line chart；
Fig. 4 is that the described deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention is to deposit
The removal effect figure of Interstitial Water ammonia nitrogen.
Detailed description of the invention
Bottom mud in lake used in following embodiment 3-9 is for being collected in northeast, Dian Chi in May, 2014 weight
Polluted area (24.908056oN；102.690278oE) top layer (0-15cm).
Described zeolite is purchased from Holland's natural zeolite；
Muffle furnace is purchased from Germany's Na Bore Muffle furnace, model: L5/11/P330+.
Embodiment 1
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 20 mesh sieves obtain deposit
Powder body, standby；Wherein, the Al in described bottom mud in lake203Content is 30%, Fe2O3Content is 10%,
CaO content is 20%, and content of MgO is 8%, K2O content is 1%, and other are 31%；Described bottom mud in lake
Loss on ignition be 30.43%；
(2) zeolite is taken, ground 200 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 50 DEG C, heats 0.5 hour, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 95% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 5% of the weight of the raw material closed, is squeezed into bulk, then carries out roasting, and the temperature of described roasting is 450 DEG C,
The time of described roasting is 3.5h, obtains described deposit/zeolite control nitrogen material.
Embodiment 2
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 200 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 30%, Al203Content is 30%, Fe2O3
Content is 30%, and CaO content is 1%, and other are 9%；The loss on ignition of described bottom mud in lake is 30.8%；
(2) zeolite is taken, ground 20 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 900 DEG C, heats 3.5 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 8% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 60% of the weight of the raw material closed, is squeezed into lamellar, then carries out roasting, and the temperature of described roasting is 750 DEG C,
The time of described roasting is 0.5h, obtains described deposit/zeolite control nitrogen material.
Embodiment 3
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 50 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 150 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 100 DEG C, heats 1 hour, is then cooled to room temperature, standby；
(4) the described Phosphorus in Sediment of Dianchi Lake after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 90% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 10% of the weight of the raw material closed, ball up, a diameter of 2mm, then carry out roasting, described roasting
Temperature be 500 DEG C, the time of described roasting is 3h, obtains described deposit/zeolite control nitrogen material.
Embodiment 4
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 150 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 50 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 800 DEG C, heats 3 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 80% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 50% of the weight of the raw material closed, ball up, a diameter of 12mm, then carry out roasting, described roasting
Temperature be 700 DEG C, the time of described roasting is 1h, obtains described deposit/zeolite control nitrogen material.
Embodiment 5
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 400 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 70% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 30% of the weight of the raw material closed, ball up, a diameter of 3mm, then carry out roasting, described roasting
Temperature be 550 DEG C, the time of described roasting is 2.5h, obtains described deposit/zeolite control nitrogen material.
Embodiment 6
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 80 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 120 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 500 DEG C, heats 2.5 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 60% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 20% of the weight of the raw material closed, ball up, a diameter of 10mm, then carry out roasting, described roasting
Temperature be 650 DEG C, the time of described roasting is 1.5h, obtains described deposit/zeolite control nitrogen material.
Embodiment 7
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 130 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 80 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 300 DEG C, heats 1.5 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 50% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 15% of the weight of the raw material closed, ball up, a diameter of 5mm, then carry out roasting, described roasting
Temperature be 600 DEG C, the time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 8
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 600 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 40% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 12% of the weight of the raw material closed, ball up, a diameter of 7mm, then carry out roasting, described roasting
Temperature be 600 DEG C, the time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 9
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 100 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 30% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 14% of the weight of the raw material closed, is squeezed into lamellar, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 10
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 21.14%, Al203Content is 45.26%,
Fe2O3Content is 22.01%, and CaO content is 5.13%, and content of MgO is 3%, K2O content is 0.46%,
TiO2Content is 3%；The loss on ignition of described bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 200 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 20% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into bulk, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 11
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 22.92%, Al203Content is 44.56%,
Fe2O3Content is 22.01%, and CaO content is 5.13%, and content of MgO is 2.81%, K2O content is 0.46%,
TiO2Content is 2.11%；The loss on ignition of described bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 300 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 45% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into lamellar, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 12
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 25%, Al203Content is 40%, Fe2O3
Content is 25%, and CaO content is 3%, and content of MgO is 4%, K2O content is 1%, TiO2Content is 2%；
The loss on ignition of described bottom mud in lake is 32%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 400 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 35% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into cellular, then carries out roasting, and the temperature of described roasting is
600 DEG C, the time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 13
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 23.14%, Al203Content is 45.26%,
Fe2O3Content is 22.01%, and CaO content is 5.13%, and content of MgO is 3%, K2O content is 0.46%,
TiO2Content is 1%；The loss on ignition of described bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 500 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 10% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into bulk, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 14
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 20%, Al203Content is 50%, Fe2O3
Content is 20%, and CaO content is 8%, and content of MgO is 1%, K2O content is 0.1%, TiO2Content is 1.9%；
The loss on ignition of described bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 700 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 30% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into lamellar, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Embodiment 15
A kind of method utilizing bottom mud in lake to prepare deposit/zeolite control nitrogen material described in the present embodiment, bag
Include following steps:
(1) gathering bottom mud in lake is raw material, freeze-dried, and ground 100 mesh sieves obtain deposit
Powder body, standby；Wherein, the SiO in described bottom mud in lake2Content is 22.92%, Al203Content is 44.56%,
Fe2O3Content is 22.01%, and CaO content is 5.13%, and content of MgO is 2.81%, K2O content is 0.46%,
TiO2Content is 2.11%；The loss on ignition of described bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 100 mesh sieves, obtain zeolite powder body, standby；
(3) take the described deposit powder body after step (1) processes to be placed in Muffle furnace and carry out heated at constant temperature
Processing, described heating-up temperature is 800 DEG C, heats 2 hours, is then cooled to room temperature, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into described zeolite powder body,
Described zeolite accounts for the 90% of the gross mass of mixed raw material, and mix homogeneously is standby；
(5) adding water infiltration in the raw material of mixing in step (4), the water yield of described addition is described mixed
The 13% of the weight of the raw material closed, is squeezed into bulk, then carries out roasting, and the temperature of described roasting is 600 DEG C,
The time of described roasting is 2h, obtains described deposit/zeolite control nitrogen material.
Experimental example
This experimental example investigate deposit/zeolite control nitrogen material to variable concentrations ammonia nitrogen absorption thermodynamic parameter and
The impact of sediment interstitial water ammonia nitrogen removal effect.
One, experiment material
Sample: the described deposit/zeolite control nitrogen material prepared according to the method for embodiment 8, wherein distinguishes
Zeolite described in step (4) is accounted for mixed raw material gross mass percentage ratio be set to 0%, 10%,
20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% preparation for sample；
Ammonium storing solution: weigh 3.8190g through 100 DEG C of dried top grade pure ammonium chloride (NH4Cl) it is dissolved in nothing
In ammonia, it is settled to 1000mL, this solution every milliliter ammonia nitrogen Han 1mg, according to being configured to 0 needed for experiment,
0.1,0.4,0.8,1.2,3,5,10,20,40,80,120,150, the ammonia nitrogen of 200mg/L
Solution, standby.
Two, experimental technique
1, deposit/zeolite control nitrogen material is to ammonia nitrogen absorption Performance Evaluation
Tested by ammonia nitrogen in high density Adsorption thermodynamics, simulate deposit of the present invention/zeolite control nitrogen material to ammonia
The impact of nitrogen maximal absorptive capacity.
Specifically comprise the following steps that
Weigh described different ratio deposit/zeolite control nitrogen material 0.5g respectively in 100mL centrifuge tube,
It is separately added into the NH of 50mL variable concentrations series4Cl solution (0,25,50,100,125,150,175,
200,225,250,275,300mg/L), put in 25 DEG C in constant temperature oscillator, 200rpm vibrates
4h, then takes out centrifuge tube, and under 5000r/min, centrifugal 15min, crosses 0.45 μm filter membrane, take supernatant
Liquid measures ammonia nitrogen concentration.
Calculated by experimental data, it is thus achieved that ammonia nitrogen in high density is inhaled by different ratio deposit/zeolite control nitrogen material
Attached isollaothermic chart, as in figure 2 it is shown, utilize Langmuir model fitting operation, it is thus achieved that different ratio deposits
Thing/zeolite control nitrogen material maximal absorptive capacity to ammonia nitrogen, as shown in Figure 3.Wherein, Langmuir equation is such as
Under:
Q=Qmax×C/(Kd+C)
In formula: Q is sample ammonia-nitrogen balance adsorbance mg/kg；QmaxMaximal absorptive capacity mg/kg；C is balance
Solution ammonia nitrogen concentration mg/L.
2, the Adsorption-desorption Characteristics of ammonia nitrogen is assessed by deposit/zeolite control nitrogen material
Tested by low-concentration ammonia-nitrogen Adsorption thermodynamics, simulate deposit of the present invention/zeolite control nitrogen material to ammonia
The impact of N2 adsorption-desorbing parameter.
Specifically comprise the following steps that
Weigh described different ratio deposit/zeolite control nitrogen material 0.5g respectively in 100mL centrifuge tube,
It is separately added into the NH of 50mL variable concentrations series4Cl solution (0.0,0.15,0.30,0.45,0.60,
0.75,0.90,1.05,1.20,1.35,1.5,1.65,1.80,1.95,2.10mg/L), put
Entering in 25 DEG C in constant temperature oscillator, 200rpm vibrates 4h, then takes out centrifuge tube, under 5000r/min
Centrifugal 15min, crosses 0.45 μm filter membrane, takes supernatant and measures ammonia nitrogen concentration.
Calculated by experimental data, it is thus achieved that low-concentration ammonia-nitrogen is inhaled by different ratio deposit/zeolite control nitrogen material
Attached isollaothermic chart, as it is shown in figure 1, utilize linear distribution model fitting operation, it is thus achieved that different ratio deposits
Thing/zeolite control nitrogen material is to ammonia nitrogen absorption-desorbing equilibrium concentration (such as Fig. 3).Wherein, linear equation is as follows:
Q=a+b*C
ENC0=(-a)/b
Q is sample ammonia-nitrogen balance adsorbance mg/kg；C is balance solution ammonia nitrogen concentration, mg/L；ENC0For
Adsorption-desorption equilibrium concentration.
3, deposit/zeolite control nitrogen material removal effect to sediment interstitial water variable concentrations ammonia nitrogen
Take Dian Chi 0-20cm bed mud, after 5000r/min is centrifuged 5-30min, take supernatant by 0.45
Um microporous filter membrane, obtains sediment interstitial water, utilizes ammonia nitrogen standard reserving solution to be configured to by sediment interstitial water
Ammonia nitrogen concentration is respectively the Interstitial Water solution of 0.8,1.2,2,3,5,10 and 20mg/l, will preparation
Good deposit/zeolite control nitrogen material is according to water: quality of materials percentage ratio is the ratio mixing of 100:1,
Then at 25 DEG C, mixing vibration 4h, 8h, 12h and 24h, tester in 200r/min constant temperature oscillator
Calculate the removal effect (figure obtaining deposit/zeolite control nitrogen material to sediment interstitial water variable concentrations ammonia nitrogen
4)。
Three, experimental result
Owing to zeolite basic framework is by silica (SiO4) tetrahedron and alumina (AlO4) tetrahedron is connected with each other
Constituting, wherein in aluminum-oxygen tetrahedron, 1 oxygen atom valency electron is not neutralized, negative charge on band, for
Keep neutral charge, must adsorb neighbouring 1 positively charged cation (M+), but these cationes with
Aluminosilicate binding ability is the most weak, therefore shows the strongest cation exchange capacity (CEC), specifically can be found in " The
removal of copper and nickel from aqueous solution using Y zeolite ion
exchangers”(Keane M A.Colloids and Surfaces A:Physicochemical and
Engineering Aspects 1998,138(1),11-20.)；In addition to there is cation exchange capacity (CEC),
Owing to silicon-oxy tetrahedron is different from the connected mode of aluminum-oxygen tetrahedron, the zeolite structured middle hole that can form many
Road and cavity, comprehensive both consider, therefore zeolite shows the strongest ammonia nitrogen absorption performance.
From figure 3, it can be seen that in material of the present invention, the ammonia nitrogen of the material containing 100% deposit is maximum
Adsorbance is 3522mg/kg, and adsorption-desorption equilibrium concentration is 0.21mg/l；Material containing 100% zeolite
Ammonia nitrogen maximal absorptive capacity be 6615mg/kg, adsorption-desorption equilibrium concentration 0.22mg/l.Show natural
Zeolitic material is significantly higher than pure deposit material to the absorption property of ammonia nitrogen, but they energy of desorptions to ammonia nitrogen
Power is suitable.Along with the increase of zeolite mixed volume, deposit/zeolite control nitrogen material maximal absorptive capacity to ammonia nitrogen
Becoming " M " curvilinear motion, but adsorption-desorption equilibrium concentration presents " W " curvilinear motion, maximal absorptive capacity is proper
Good and minimum absorption-parsing equilibrium concentration is corresponding.Thus, we can preferably go out high absorption capacity,
The control nitrogen material optimum proportioning of low desorption ability, respectively 40% zeolite, 60% zeolite and 70% zeolite, its
In 40% zeolite proportioning best results, cost is minimum.
Different ratio deposit/zeolite control nitrogen material is to sediment interstitial water ammonia nitrogen removal effect such as Fig. 4 institute
Showing, the control nitrogen material of 40%-80% zeolite proportioning is preferable to the removal effect of ammonia nitrogen, and wherein, 40% zeolite is joined
The control nitrogen material of ratio is best, especially to low ammonia nitrogen concentration to the concentration removal effect of sediment interstitial water ammonia nitrogen
Interstitial Water effect is preferable.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment
Restriction.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-form.Here without also cannot all of embodiment be given exhaustive.
And the obvious change thus extended out or variation still in the invention protection domain it
In.
Claims (10)
1. one kind utilizes the method that bottom mud in lake prepares deposit/zeolite control nitrogen material, it is characterised in that
Comprise the steps:
(1) gathering bottom mud in lake, freeze-dried, grinding is sieved, and obtains deposit powder body, standby；
(2) taking zeolite, grinding is sieved, and obtains zeolite powder body, standby；
(3) take step (1) to process the described deposit powder body that obtains and carry out heated at constant temperature process, then
Cooling, standby；
(4) the described deposit powder body after step (3) processes is proportionally added into step (2) to process
The described zeolite powder body obtained, mix homogeneously, standby；
(5) in step (4), the raw material of mixing adds water infiltration, extruded, then carry out roasting,
Obtain described deposit/zeolite control nitrogen material.
Method the most according to claim 1, it is characterised in that in described step (4), described
Zeolite powder body accounts for the 10%-90% of the gross mass of mixed raw material.
Method the most according to claim 1 and 2, it is characterised in that in described step (4),
Described zeolite accounts for the 40%-70% of the gross mass of mixed raw material.
4. according to the method described in claim 1-3 any one, it is characterised in that described step (3)
In, the temperature of described heated at constant temperature is 100-800 DEG C, and the time that described heated at constant temperature processes is 1-3 hour.
5. according to the method described in claim 1-4 any one, it is characterised in that described step (3)
In, the temperature of described heated at constant temperature is 400-600 DEG C.
6. according to the method described in claim 1-5 any one, it is characterised in that described step (4)
In, described zeolite accounts for the 40% of described mixing raw material gross mass.
7. according to the method described in claim 1-6 any one, it is characterised in that described step (5)
In, the raw material of described mixing carries out the temperature of roasting and is 500-700 DEG C, and the time of described roasting is 1-3h.
8. according to the method described in claim 1-7 any one, it is characterised in that described step (5)
In, described deposit/zeolite control nitrogen material be shaped as spherical, lamellar, bulk or cellular；Described
The 10%-50% of the weight of the raw material that the water yield is described mixing added.
9. the deposit that the method described in claim 1-10 any one prepares/zeolite control nitrogen material
Purposes at preparation ammonia nitrogen absorption Material Field.
Purposes the most according to claim 11, it is characterised in that described ammonia nitrogen absorption material is
Lake sediment ammonia nitrogen release resistance control material.
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| CN114700034A (en) * | 2020-12-07 | 2022-07-05 | 中国环境科学研究院 | Nitrogen-controlling and aquatic plant habitat repairing material and preparation method and application thereof |
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| CN106006814B (en) | 2019-06-14 |
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