CN106006814B - Utilize the deposit/zeolite control nitrogen material and method, application of bottom mud in lake preparation - Google Patents
Utilize the deposit/zeolite control nitrogen material and method, application of bottom mud in lake preparation Download PDFInfo
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Abstract
Deposit/zeolite control the nitrogen material and method, application that the present invention relates to the use of bottom mud in lake preparation are raw material by acquisition bottom mud in lake, freeze-dried, are ground up, sieved, and deposition powder is obtained, spare；Zeolite is taken, is ground up, sieved, zeolite powder is obtained, it is spare；Then it takes treated to deposit powder progress heated at constant temperature processing, then cools down, it is spare；It is proportionally added into zeolite powder into deposition powder, is uniformly mixed, water infiltration is then added into mixed raw material, extrusion forming roasts to get deposit/zeolite control nitrogen material；The present invention is using bottom mud in lake as raw material, bound zeolite material, so that deposit/zeolite control nitrogen material significantly improves ammonia nitrogen absorption performance, ammonia nitrogen desorption ability is significantly reduced；Material materials are cheap, and highly-safe, social and economic benefits and good does not have ecological risk, energy conservation and environmental protection to water body in lake；Sediment interstitial water ammonia nitrogen concentration is significantly cut down in application process, reaches bottom mud in lake ammonia nitrogen release resistance control purpose.
Description
Technical field
The invention belongs to bottom mud in lake pollution control technology fields, and in particular to a kind of deposition prepared using bottom mud in lake
Object/zeolite control nitrogen material and method, application.
Background technique
Ammonia nitrogen is the important pollutant in water body, mainly from various industrial wastewaters and urban life effluent sewage etc..Water body
In ammonia-nitrogen content it is exceeded, water eutrophication can be caused, to aquatile generate toxic action, cause black and odorous water, make
Quality of water environment deteriorates, and increases the degree of difficulty and cost of Water purification, to influence human health.Deposit is also known as bed mud,
It is the important home to return to and accumulation library into pollution of water objects such as river, lakes, and is the endogenous of overlying water pollution.Especially
After external source pollution is effectively controlled or is truncated completely, deposit can become the weight of surface water body overlying water pollutant
Want source.Since deposit discharges the important sources that nitrogen, especially ammonia nitrogen release are eutrophic lake overlying water nitrogen, thus it is right
The resistance control of nutrition enriched shallow lake deposit ammonia nitrogen release is particularly important.
The processing method of ammonia nitrogen waste water mainly has the conventional process sides such as blow-off method, break point chlorination, ion-exchange at present
Method, and the research for ammonia nitrogen in eutrophic lake water/sediment interface release resistance prosecutor face is less.It is existing that richness is sought
Feedingization shallow lake deposit processing technique is broadly divided into in-situ treatment technology and two kinds of dystopy processing technique.Dystopy processing is main
It is Sediment Dredging engineering；In-situ treatment can be divided into physics, chemistry and biologic treating technique.Wherein, physical processing techniques mainly have
Covering in situ and artificial aeration；Chemical treatment method is mainly chemical passivation technology and chemical enhancement；Biologic treating technique is main
There are animals and plants, microorganism and restoration of the ecosystem processing technique.Dystopy processing is to excavate contaminated deposit and be sent to click through otherly
Row processing, dystopy processing are mainly technology for environmental dredging, however, when the improper measures taken in dredging work, it will are brought tight
Weight consequence, if dredging depth control is improper, deep layer pollutant can discharge into water body, break original nitrogen, phosphorus dissolution equilibrium, make
Release conditions are chronically at bed mud after dredging, while Dredging Process will affect original aquatic ecosystem in Water Environment In Lakes
System, destroys benthic living environment, influences the recovery of lake ecosystem, and dredges and need high capital, control expense
It is sufficiently expensive.Soverlay technique also known as closing, macking technique in situ, is placed on marine sediments surface in in-situ treatment technology
One layer of cleaning covering, thus a kind of method for preventing pollutants in sediments from discharging to water body, however its there is also many deficiencies:
(1) covering material need to largely clean the materials such as silt, and source is more difficult；
(2) its uniformity is difficult to ensure when covering, and is added and be will increase bed mud thickness, and water depth is reduced；
(3) in the faster waters of water body flow, covering material is easily washed in a pan erosion, while soverlay technique is to Benthic ecology system
Being damaged to a certain extent property.
In in-situ treatment technology, chemical treatment method is to play fixed make to pollutant in deposit by using chemical reagent
With.However, can there is a problem of that Chemical lab management safety is poor using chemical reagent, the public larger to biotic influence in water body
It is difficult to receive, easily causes the secondary pollution of water body.
In in-situ treatment technology, biologic treating technique is to be dropped using organism by adding plant, animal, microorganism
Deposit, pollutant are solved, its toxicity is eliminated or reduce, in recent years, domestic and international researcher passes through the ecology for manually building simulation
System (such as artificial floating island, artificial swamp), the repair of microorganism, plant, animal is mutually unified, the life of forming region
Object recovery technique, and be applied in engineering practice, good environmental benefit, ecological benefits and economic benefit are achieved, however, raw
The state recovery technique period is longer, and effect is unobvious in a short time.Since lake sediment-water interface is a complex environment,
Environmental condition slight change, the Nutrient releases such as nitrogen, phosphorus risk can be very big.It is directed to this problem in the world, attempts to utilize absorption
Technical controlling nutrition enriched shallow lake water/sediment interface ammonia nitrogen release, because adsorption technology has easy to operate, quick height
Effect, the advantages that without secondary pollution and adsorbent is reusable.
The water/sediment interface ammonia nitrogen absorption material mainly used both at home and abroad at present are as follows: active bio charcoal, has apatite
Machine clay, natural and modified zeolite and calcite etc..Wherein, zeolite is because it is with large specific surface area and cation exchange capacity (CEC),
Show good ammonia nitrogen absorption performance.A kind of pollution of water bottom as disclosed in Chinese patent literature CN102674646
The in-situ remediation method of mud by the way that nitrate is injected bed mud using the organic pollutant in nitrate removal bed mud, and inhibits
The release of phosphorus, then active covering material is added in bed mud-water termination and forms one layer of activity covering layer system, activity covering material
It include the zeolite that natural zeolite or cationic surfactant are modified in material, using in the activity covering layer system control bed mud
The ammonia nitrogen released, and prevent nitrate in pore water to the migration of overlying water and the dirt for the nitrate for preventing overlying water
Dye.It can realize that the in-situ immobilization to the surface water bodies bed mud such as Hu Bo, river, control Nitrogen In Sediment, phosphorus etc. have through the above scheme
The release of machine object.However, there is also following many deficiencies for above scheme: 1, modified zeolite needed in modifying process using sun from
Sub- surfactant is substantially increased in use modified zeolite since cationic surfactant price is relatively high to surface water
The cost of the in-situ immobilization of body pollution bed mud；2, zeolite carries out modified needing distilled water clear in cationic surfactant mixing
It washes, when cleaning is not thorough, the possible interim storage of partial cation surfactant is in the vestibule of zeolite, when the modified zeolite
When in-situ immobilization for surface water body, the unadsorbed cationic surfactant in zeolite can be discharged into overlying water,
Cause the secondary pollution of water body；3, due in the in-situ method use arrived chemical reagent nitrate, in order to reduce nitrate
Nitrate nitrogen enters the ratio in overlying water, and the mixture of the modified zeolite or modified zeolite and natural zeolite that are wrapped up with geotextiles is thrown
It is added to bed mud-water termination, but is still that can not keep away even if the nitrate nitrogen for reducing reduction nitrate enters the ratio in overlying water
Exempt from nitrate to enter in overlying water, cause the pollution of water body, ecological security is poor, and the modification wrapped up using geotextiles
Zeolite covering bed mud is comparatively laborious, bigger for geotextiles demand, and needs to regularly replace, and improves rehabilitation cost；4,
In the in-situ remediation method, the main function of bed mud, which is added, in nitrate is degradation and removes removal organic polluter and inhibit sedimentary phosphate
Migration, what absorption and controlled release for ammonia nitrogen relied primarily on is the mixture of modified zeolite or modified zeolite and natural zeolite,
However the ammonia nitrogen absorption amount of modified zeolite and natural zeolite is limited, if modified boiling need to be improved in order to improve ammonia nitrogen absorption and controlled release
The usage amount of the mixture of stone or modified zeolite and natural zeolite, greatly improves cost.It can be seen from the above, in sediment-water circle
Suitable, cheap, green and high ecological security ammonia nitrogen absorption controlled release material is not found in face ammonia control field
Material.How suitable ammonia nitrogen absorption controlled-release material is found to change the micro of water/sediment interface, to control deposit
Endogenous pollution load, in order to which the restoration of the ecosystem of water body later period is an emphasis of research.
" Taihu Lake Sediment nitrogen phosphorus adsorption/desorption signature analysis " (Jiang Xia, Wang Qiujuan, Wang Shuhang etc., environmental science,
2011, (05), 1285-1291) in disclose, Taihu Lake Sediment ammonia nitrogen average adsorption amount is 23.55mg/kg, in seriously polluted area
Domain adsorbance is bigger, it is seen then that lake sediment has certain adsorption capacity to ammonia nitrogen.However, since lake sediment is by a variety of
The influence of environmental factor, with seasonal variety, to nutrient, there are the processes of source-sink transition, and for details, reference can be made to " Taihu Lake depositions
The spatial diversity and source-Correspondent amount of 1. ammonium nitrogen rate of release of object-water termination bioactive elemements migration mechanism and quantification-" (model
Cheng Xin, Zhang Lu, Qin uncle are strong etc., lake science, 2004, (01), 10-20).Since the source-sink transition process to deposit is difficult to
Control causes to use deposit as ammonia nitrogen absorption controlled-release material there are risk, is easy to aggravate the pollution of water body, causes water body
Secondary pollution, ecological security is poor, thus about prepared with lake sediment ammonia nitrogen adsorbent pertinent literature report and it is few.
As being related to being not used to the absorption of ammonia nitrogen and controlled release in waste water with adsorbent prepared by deposit in the prior art, but use
In the absorption of heavy metal ions in wastewater, discloses and a kind of prepared with Sediments of Dian Chi Lake in Chinese patent literature CN104437374A
Bed mud distilled water immersion is repeated washing by soaking and dried, glutaraldehyde activated dose of gradeization is added by the method and application of adsorbent
Reagent is learned, is then acidified, be carbonized, washed and adsorbent obtained by drying, the absorption property that deposit is utilized is strong, inexpensively
With the advantages such as energy conservation and environmental protection, cost is greatly reduced, and obtain significant adsorption effect.However bed mud is used in above scheme
The adsorbent of preparation is only for absorption heavy metal ion, and not mentioning the adsorbent can lake or river to eutrophication
Ammonia nitrogen in stream is adsorbed and is controlled, it is seen that though have cheap, absorption property strong using the adsorbent of deposit preparation and
The advantages that energy conservation and environmental protection, but since deposit preparation ammonia nitrogen absorption and controlled-release material risk are big, do not have in the prior art out
The ammonia nitrogen control nitrogen material now prepared using deposit as raw material.For this purpose, the present invention provides it is a kind of using bottom mud in lake preparation
Deposit/zeolite control nitrogen material and method, application reach " treatment of wastes with processes of wastes against one another " purpose, reduce cost, and the control nitrogen material prepared
Expect it is highly-safe, it is excellent for the absorption and control effect of ammonia nitrogen, there is no any ecological risk to water body in lake.
Summary of the invention
It is not strong to ammonia nitrogen absorption amount, outstanding that technical problem to be solved by the present invention lies in ammonia nitrogen controlled-release materials in the prior art
Its application effect in the release resistance control of water/sediment interface nitrogen is unobvious and at high cost, ecological security is poor, economic society
Benefit is low, and then it is stronger to provide a kind of pair of ammonia nitrogen absorption ability, and especially water/sediment interface ammonia nitrogen release resistance control effect is more preferable,
And it the high deposit/zeolite control nitrogen material using bottom mud in lake preparation of cheap, environmentally protective and ecological security and method, answers
With.
For this purpose, it is provided by the invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, including such as
Lower step:
(1) bottom mud in lake is acquired, it is freeze-dried, it is ground up, sieved, obtains deposition powder, it is spare；
(2) zeolite is taken, is ground up, sieved, zeolite powder is obtained, it is spare；
(3) the deposition powder for taking step (1) processing to obtain carries out heated at constant temperature processing, then cools down, spare；
(4) step (2) are proportionally added into step (3) treated the deposition powder and handle the obtained boiling
Mountain flour body is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), then extrusion forming is roasted and sunk to get described
Product object/zeolite control nitrogen material.
In the step (4), the zeolite powder accounts for the 10-90% of the gross mass of mixed raw material.
Preferably, in the step (4), the zeolite powder accounts for the 40-70% of the gross mass of mixed raw material.
It is furthermore preferred that the zeolite powder accounts for the 40% of the gross mass of mixed raw material.
In the step (3), the temperature of the heated at constant temperature is 100-800 DEG C.
Preferably, in the step (3), the temperature of the heated at constant temperature is 400-600 DEG C.
It is furthermore preferred that the temperature of the heated at constant temperature is 600 DEG C.
In the step (3), the time of the heated at constant temperature processing is 1-3 hours.Preferably, the heating treatment time
It is 3 hours.
In the step (5), the temperature that the mixed raw material is roasted is 500-700 DEG C, the time of the roasting
For 1-3h.
Preferably, the temperature that the mixed raw material is roasted is 600 DEG C, and the time of the roasting is 2h.
In the step (1), the ground 50-150 mesh of bottom mud in lake.Preferably, the bottom mud in lake is ground
100 meshes.
In the step (2), the ground 50-150 mesh of zeolite.Preferably, the zeolite grinding sieves with 100 mesh sieve.
In the step (5), the deposit/zeolite control nitrogen material shape is spherical, sheet, bulk or porous
Shape.Preferably, the deposit/zeolite control nitrogen material shape is spherical, diameter 3-10mm.
The water of the addition is the 10%-50% of the weight of the mixed raw material, it is preferred that the water of the addition
For the 10%-15% of the weight of the mixed raw material.
It include SiO in the bottom mud in lake2、Al203、Fe2O3、CaO、MgO、K2O and/or TiO2Ingredient.
Preferably, the SiO in the bottom mud in lake2Content is 20-25%, Al203Content is 40-50%, Fe2O3Content is
20-25%, CaO content 3-8%, content of MgO 1-4%, K2O content is 0.1-1%, TiO2Content is 1-3%.
It is furthermore preferred that the SiO in the bottom mud in lake2Content is 22.92%, Al203Content is 44.56%, Fe2O3Content
It is 22.01%, CaO content 5.13%, content of MgO 2.81%, K2O content is 0.46%, TiO2Content is 2.11%.
The loss on ignition of the bottom mud in lake is 28-32%.Preferably, the loss on ignition of the bottom mud in lake is 30.43%.
Preferably, the bottom mud in lake is Phosphorus in Sediment of Dianchi Lake.
The present invention also provides a kind of deposit being prepared by the method/zeolite control nitrogen materials to prepare ammonia nitrogen
The application in adsorbent material field.The ammonia nitrogen absorption material is lake sediment ammonia nitrogen release resistance control material.
The above technical solution of the present invention has the following advantages over the prior art:
(1) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, pass through acquisition
Bottom mud in lake is raw material, freeze-dried, is ground up, sieved, and deposition powder is obtained, spare；Zeolite is taken, is ground up, sieved, is boiled
Mountain flour body, it is spare；Then taking that treated, the deposition powder carries out heated at constant temperature processing, cooling；Into the deposit
It is mixed into zeolite powder in proportion, is uniformly mixed；Then add water infiltration into mixed raw material, then extrusion forming is roasted
It burns to get the deposit/zeolite control nitrogen material；By the way that using bottom mud in lake as raw material, then heat treatment is added thereto
Zeolitic material, by heat treatment after deposit mixed in proportion with zeolite, then infiltrated, extrusion forming and roasting prepare
Deposit/zeolite control nitrogen material effect in terms of the ammonia nitrogen in the lake of absorption eutrophication or river deposit Interstitial Water is aobvious
Write so that deposit to ammonia nitrogen absorption performance in conjunction with the absorption property for ammonia nitrogen of zeolite, greatly improve to ammonia nitrogen
Absorption, obtain unexpected effect, and the deposit/zeolite control nitrogen material is highly-safe, water body in lake do not appointed
What ecological risk, reaches " treatment of wastes with processes of wastes against one another " purpose, energy conservation and environmental protection, and due to the addition of deposit, reduces making for zeolite
Dosage greatly reduces cost, therefore, solves that the ammonia nitrogen absorption amount of ammonia nitrogen controlled-release material in the prior art is strong, cost
High and ecological security difference problem；
(2) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, pass through control
Zeolite mass percent shared in control nitrogen material is 10-90%, optimizes the control nitrogen material specific surface area, total hole with this
Hold, CEC content, to improve the ammonia nitrogen absorption performance of the control nitrogen material, reduces material ammonia nitrogen absorption-desorption balance itself
Concentration, and then reach the resistance control effect to the release of bottom mud in lake ammonia nitrogen；
(3) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, by that will boil
Stone mass percent shared in control nitrogen material is further adjusted to 30%-50%, both can guarantee the ratio of the control nitrogen material
Surface area, total pore volume, CEC content, and it is excessively high to avoid deposit content, blocks zeolite cavity and cavity, it is suppressed that zeolite
Cation exchange capacity (CEC), while also reducing a part that zeolite is generated by electrostatic force and dispersion force to a certain extent and adsorbing
Ability, the control nitrogen material being prepared reach maximum for the adsorbance of ammonia nitrogen in waste water；
(4) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, pass through control
The heat treatment temperature of the deposition powder is 100-800 DEG C, improves deposit to the adsorbance of ammonia nitrogen, reduces deposit
Adsorption-desorption equilibrium concentration；
(5) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, by into one
The heat treatment temperature of the deposition powder is adjusted to 400-600 DEG C by step, not only significantly improves the control nitrogen material of preparation
To the adsorbance of ammonia nitrogen, the adsorption-desorption equilibrium concentration of material itself is reduced, and is also avoided since temperature is excessively high, is led
It causes the control nitrogen material internal structure that may be destroyed, influences the control nitrogen material to the absorption property of ammonia nitrogen, and pass through control
The temperature being heat-treated to the deposit is made, so that the deposit/zeolite control nitrogen material service life extends, it can be long-term
It uses, and still maintains good ammonia nitrogen release resistance control effect；
(6) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, pass through control
The time of heat treatment is 1-3 hours, ensure that large amount of adsorption of the control nitrogen material being prepared to ammonia nitrogen, desorption quantity minimum；
(7) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, by step
Suddenly mixed raw material adds water infiltration to form in (4), then carries out high-temperature roasting, so that the control nitrogen material of preparation is for ammonia
The adsorbance of nitrogen is further enhanced, and by the impurity of roasting removal material internal, increases specific surface area, and especially mixing is former
Zeolite in material further increases control nitrogen material to the adsorbance of ammonia nitrogen；
(8) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, by institute
It states in step (5), controlling the temperature that the mixed raw material is roasted is 500-700 DEG C, not only significantly improves the institute of preparation
Stating control nitrogen material reduces the adsorption-desorption equilibrium concentration of material itself to the adsorbance of ammonia nitrogen, and by control to deposition
The temperature that object and the raw material of zeolite mixing are roasted, so that the deposit/zeolite control nitrogen material service life extends, energy
It is enough to be used for a long time, and still maintain good ammonia nitrogen release resistance control effect；
(9) it is of the present invention it is a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, described is heavy
The shape of product object/zeolite control nitrogen material is spherical, sheet or cellular, is more conducive to suction of the control nitrogen material to ammonia nitrogen
It is attached；
(10) a kind of deposit/zeolite control nitrogen material prepared using bottom mud in lake of the present invention, since it is to ammonia
Nitrogen has significant absorption property, and control nitrogen material ammonia nitrogen desorption quantity is smaller, allows to be widely used in prepare ammonia nitrogen suction
Enclosure material field especially can be effectively applied to lake sediment-water interface ammonia nitrogen release resistance control technical field, to lake pollution bottom
Mud is administered and eutrophication prevention and control aspect application and popularization value with higher.
Detailed description of the invention
In order to make the content of the present invention more clearly understood, it below according to specific embodiments of the present invention and combines
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is that the deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention inhales low-concentration ammonia-nitrogen
Attached isollaothermic chart；
Fig. 2 is that the deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention inhales ammonia nitrogen in high density
Attached isollaothermic chart；
Fig. 3 is the deposit/zeolite control nitrogen material adsorption isotherm map of different ratio in experimental example of the present invention；
Fig. 4 is the deposit/zeolite control nitrogen material of different ratio in experimental example of the present invention to sediment interstitial water
The removal effect figure of ammonia nitrogen.
Specific embodiment
Bottom mud in lake used in following embodiment 3-9 is to be collected in Dian Chi in May, 2014 northeast heavily contaminated region
(24.908056oN；102.690278oE) surface layer (0-15cm).
The zeolite is purchased from Dutch natural zeolite；
Muffle furnace is purchased from Germany's Na Bore Muffle furnace, model: L5/11/P330+.
Embodiment 1
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 20 mesh obtains deposition powder, spare；Its
In, the Al in the bottom mud in lake203Content is 30%, Fe2O3Content is 10%, CaO content 20%, content of MgO 8%,
K2O content is 1%, other are 31%；The loss on ignition of the bottom mud in lake is 30.43%；
(2) zeolite is taken, ground 200 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 50 DEG C, heats 0.5 hour, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 95% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 5% of amount, is squeezed into bulk, is then roasted, and the temperature of the roasting is 450 DEG C, and the time of the roasting is 3.5h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 2
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 200 mesh obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 30%, Al203Content is 30%, Fe2O3Content is 30%, CaO content 1%,
Other are 9%；The loss on ignition of the bottom mud in lake is 30.8%；
(2) zeolite is taken, ground 20 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 900 DEG C, heats 3.5 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 8% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 60% of amount squeezes slabbing, is then roasted, and the temperature of the roasting is 750 DEG C, and the time of the roasting is 0.5h,
Up to the deposit/zeolite control nitrogen material.
Embodiment 3
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 50 mesh obtains deposition powder, spare；
(2) zeolite is taken, ground 150 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 100 DEG C, heats 1 hour, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the Phosphorus in Sediment of Dianchi Lake, the zeolite accounts for
The 90% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 10% of amount, then ball up, diameter 2mm is roasted, and the temperature of the roasting is 500 DEG C, the roasting when
Between for 3h to get the deposit/zeolite control nitrogen material.
Embodiment 4
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 150 mesh obtains deposition powder, spare；
(2) zeolite is taken, ground 50 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 800 DEG C, heats 3 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 80% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 50% of amount, then ball up, diameter 12mm is roasted, and the temperature of the roasting is 700 DEG C, the roasting
Time is 1h to get the deposit/zeolite control nitrogen material.
Embodiment 5
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 400 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 70% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 30% of amount, then ball up, diameter 3mm is roasted, and the temperature of the roasting is 550 DEG C, the roasting when
Between for 2.5h to get the deposit/zeolite control nitrogen material.
Embodiment 6
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 80 mesh obtains deposition powder, spare；
(2) zeolite is taken, ground 120 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 500 DEG C, heats 2.5 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 60% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 20% of amount, then ball up, diameter 10mm is roasted, and the temperature of the roasting is 650 DEG C, the roasting
Time is 1.5h to get the deposit/zeolite control nitrogen material.
Embodiment 7
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, ground 130 mesh obtains deposition powder, spare；
(2) zeolite is taken, ground 80 mesh obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 300 DEG C, heats 1.5 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 50% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 15% of amount, then ball up, diameter 5mm is roasted, and the temperature of the roasting is 600 DEG C, the roasting when
Between for 2h to get the deposit/zeolite control nitrogen material.
Embodiment 8
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 600 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 40% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 12% of amount, then ball up, diameter 7mm is roasted, and the temperature of the roasting is 600 DEG C, the roasting when
Between for 2h to get the deposit/zeolite control nitrogen material.
Embodiment 9
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 100 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 30% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 14% of amount squeezes slabbing, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 10
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 21.14%, Al203Content is 45.26%, Fe2O3Content is 22.01%, CaO
Content is 5.13%, content of MgO 3%, K2O content is 0.46%, TiO2Content is 3%；The loss on ignition of the bottom mud in lake is
30.43%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 200 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 20% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount, is squeezed into bulk, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 11
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 22.92%, Al203Content is 44.56%, Fe2O3Content is 22.01%, CaO
Content is 5.13%, content of MgO 2.81%, K2O content is 0.46%, TiO2Content is 2.11%；The burning of the bottom mud in lake
Vector is 30.43%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 300 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 45% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount squeezes slabbing, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 12
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 25%, Al203Content is 40%, Fe2O3Content is 25%, CaO content 3%,
Content of MgO is 4%, K2O content is 1%, TiO2Content is 2%；The loss on ignition of the bottom mud in lake is 32%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 400 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 35% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount, is squeezed into cellular, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h,
Up to the deposit/zeolite control nitrogen material.
Embodiment 13
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 23.14%, Al203Content is 45.26%, Fe2O3Content is 22.01%, CaO
Content is 5.13%, content of MgO 3%, K2O content is 0.46%, TiO2Content is 1%；The loss on ignition of the bottom mud in lake is
30.43%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 500 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 10% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount, is squeezed into bulk, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 14
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 20%, Al203Content is 50%, Fe2O3Content is 20%, CaO content 8%,
Content of MgO is 1%, K2O content is 0.1%, TiO2Content is 1.9%；The loss on ignition of the bottom mud in lake is 30.43%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 700 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 30% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount squeezes slabbing, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Embodiment 15
It is a kind of described in the present embodiment to prepare deposit/zeolite control nitrogen material method using bottom mud in lake including as follows
Step:
(1) acquisition bottom mud in lake is raw material, and freeze-dried, grinding sieves with 100 mesh sieve, and obtains deposition powder, spare；Its
In, the SiO in the bottom mud in lake2Content is 22.92%, Al203Content is 44.56%, Fe2O3Content is 22.01%, CaO
Content is 5.13%, content of MgO 2.81%, K2O content is 0.46%, TiO2Content is 2.11%；The burning of the bottom mud in lake
Vector is 30.43%；
(2) zeolite is taken, grinding sieves with 100 mesh sieve, and obtains zeolite powder, spare；
(3) take step (1) treated the deposition powder to be placed in progress heated at constant temperature processing in Muffle furnace, it is described plus
Hot temperature is 800 DEG C, heats 2 hours, then cools to room temperature, spare；
(4) it is proportionally added into the zeolite powder into step (3) treated the deposition powder, the zeolite accounts for
The 90% of the gross mass of mixed raw material is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), the water of the addition is the weight of the mixed raw material
The 13% of amount, is squeezed into bulk, is then roasted, and the temperature of the roasting is 600 DEG C, and the time of the roasting is 2h, i.e.,
Obtain the deposit/zeolite control nitrogen material.
Experimental example
This experimental example investigates deposit/zeolite control nitrogen material between various concentration ammonia nitrogen absorption thermodynamic parameter and deposit
The influence of gap water ammonia nitrogen removal effect.
One, experimental material
Sample: the deposit/zeolite control nitrogen material prepared according to the method for embodiment 8, wherein respectively by step (4)
Described in the zeolite gross mass that accounts for mixed raw material percentage be set as 0%, 10%, 20%, 30%, 40%, 50%,
60%, 70%, 80%, 90%, 100% preparation is sample；
Ammonium stock solution: 3.8190g is weighed through 100 DEG C of dried excellent pure grade ammonium chloride (NH4Cl it) is dissolved in no ammonium hydroxide, it is fixed
Hold to 1000mL, every milliliter of ammonia nitrogen containing 1mg of this solution, according to be configured to 0 needed for experiment, 0.1,0.4,0.8,1.2,3,5,10,
20, the ammonia nitrogen solution of 40,80,120,150,200mg/L, it is spare.
Two, experimental method
1, deposit/zeolite control nitrogen material is to ammonia nitrogen absorption Performance Evaluation
It is tested by ammonia nitrogen in high density Adsorption thermodynamics, simulates deposit/zeolite control nitrogen material of the present invention to ammonia nitrogen maximum
The influence of adsorbance.
Specific step is as follows:
The different ratio deposit/zeolite control nitrogen material 0.5g is weighed respectively in 100mL centrifuge tube, is separately added into
The NH of 50mL various concentration series4Cl solution (0,25,50,100,125,150,175,200,225,250,275,300mg/L),
It is put into constant temperature oscillator in 25 DEG C, 200rpm vibrates 4h, then takes out centrifuge tube, 15min, mistake are centrifuged at 5000r/min
0.45 μm of filter membrane takes supernatant to measure ammonia nitrogen concentration.
It is calculated by experimental data, obtains different ratio deposit/zeolite control nitrogen material to ammonia nitrogen in high density adsorption isotherm
Line chart, as shown in Fig. 2, obtaining different ratio deposit/zeolite control nitrogen material to ammonia nitrogen using Langmuir model fitting operation
Maximal absorptive capacity, as shown in Figure 3.Wherein, Langmuir equation is as follows:
Q=Qmax×C/(Kd+C)
In formula: Q is sample ammonia-nitrogen balance adsorbance mg/kg；QmaxMaximal absorptive capacity mg/kg；C is that balance solution ammonia nitrogen is dense
Spend mg/L.
2, deposit/zeolite control nitrogen material assesses the Adsorption-desorption Characteristics of ammonia nitrogen
It is tested by low-concentration ammonia-nitrogen Adsorption thermodynamics, simulates deposit/zeolite control nitrogen material of the present invention to ammonia nitrogen absorption-
Desorb the influence of parameter.
Specific step is as follows:
The different ratio deposit/zeolite control nitrogen material 0.5g is weighed respectively in 100mL centrifuge tube, is separately added into
The NH of 50mL various concentration 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), it is put into constant temperature oscillator in 25 DEG C, 200rpm vibrates 4h, then takes out centrifugation
Pipe is centrifuged 15min at 5000r/min, crosses 0.45 μm of filter membrane, and supernatant is taken to measure ammonia nitrogen concentration.
It is calculated by experimental data, obtains different ratio deposit/zeolite control nitrogen material to low-concentration ammonia-nitrogen adsorption isotherm
Line chart, as shown in Figure 1, obtaining different ratio deposit/zeolite control nitrogen material to ammonia nitrogen using linear distribution model fitting operation
Adsorption-desorption 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；ENC0It is flat for absorption-desorption
Weigh concentration.
3, removal effect of the deposit/zeolite control nitrogen material to sediment interstitial water various concentration ammonia nitrogen
After taking Dian Chi 0-20cm bed mud, 5000r/min to be centrifuged 5-30min, take supernatant by 0.45um miillpore filter, i.e.,
Sediment interstitial water, using ammonia nitrogen standard reserving solution by sediment interstitial water be configured to ammonia nitrogen concentration be respectively 0.8,1.2,2,
3, the gap aqueous solution of 5,10 and 20mg/l, by the deposit prepared/zeolite control nitrogen material according to water: quality of materials percentage
It is mixed for the ratio of 100:1, then at 25 DEG C, mixing oscillation 4h, 8h, 12h and for 24 hours in 200r/min constant temperature oscillator, test
Deposit/zeolite control nitrogen material is calculated to the removal effect (Fig. 4) of sediment interstitial water various concentration ammonia nitrogen.
Three, experimental result
Since zeolite basic framework is by silicon oxygen (SiO4) tetrahedron and alumina (AlO4) tetrahedron is interconnected to constitute,
In in aluminum-oxygen tetrahedron 1 oxygen atom valence electron do not obtain in and, take negative electrical charge, for keep neutral charge, must absorption it is attached
Nearly 1 positively charged cation (M+), however these cations are very weak with alumino-silicate binding ability, therefore show very strong
Cation exchange capacity (CEC), for details, reference can be made to " 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.)；Except with cation exchange
Outside ability, since oxygen-octahedron is different from the connection type of aluminum-oxygen tetrahedron, it is zeolite structured in will form many duct and
Cavity, it is both comprehensive to consider, therefore zeolite shows very strong ammonia nitrogen absorption performance.
From figure 3, it can be seen that in material of the present invention, the ammonia nitrogen maximal absorptive capacity of the material containing 100% deposit is
3522mg/kg, adsorption-desorption equilibrium concentration 0.21mg/l；The ammonia nitrogen maximal absorptive capacity of material containing 100% zeolite is
6615mg/kg, adsorption-desorption equilibrium concentration 0.22mg/l.Show that natural zeolite material is significantly higher than the absorption property of ammonia nitrogen
Pure deposit material, but they are suitable to the desorption ability of ammonia nitrogen.With the increase of zeolite mixed volume, deposit/zeolite control nitrogen
Material is to the maximal absorptive capacity of ammonia nitrogen at " M " curvilinear motion, but " W " curvilinear motion is presented in adsorption-desorption equilibrium concentration, and maximum is inhaled
Attached amount is just corresponding with the smallest absorption-parsing equilibrium concentration.We can preferably go out high absorption capacity, low desorption as a result,
The control nitrogen material optimum proportioning of ability, respectively 40% zeolite, 60% zeolite and 70% zeolite, wherein 40% zeolite proportioning effect
Most preferably, cost is minimum.
Different ratio deposit/zeolite control nitrogen material is to sediment interstitial water ammonia nitrogen removal effect as shown in figure 4,40%-
The control nitrogen material of 80% zeolite proportion is preferable to the removal effect of ammonia nitrogen, wherein the control nitrogen material of 40% zeolite proportion is to deposition
The concentration removal effect of object Interstitial Water ammonia nitrogen is best, especially preferable to low ammonia nitrogen concentration Interstitial Water effect.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of prepare deposit/zeolite control nitrogen material method using bottom mud in lake, which comprises the steps of:
(1) bottom mud in lake is acquired, it is freeze-dried, it is ground up, sieved, obtains deposition powder, it is spare；
(2) zeolite is taken, is ground up, sieved, zeolite powder is obtained, it is spare；
(3) the deposition powder for taking step (1) processing to obtain carries out heated at constant temperature processing, then cools down, spare；
(4) step (2) are proportionally added into step (3) treated the deposition powder and handle the obtained zeolite powder
Body is uniformly mixed, spare；
(5) add water infiltration in the raw material mixed into step (4), then extrusion forming is roasted to get the deposition
Object/zeolite control nitrogen material.
2. the method according to claim 1, wherein the zeolite powder accounts for mixed in the step (4)
The 10%-90% of the gross mass of raw material.
3. method according to claim 1 or 2, which is characterized in that in the step (4), the zeolite powder accounts for mixing
The 40%-70% of the gross mass of raw material afterwards.
4. method according to claim 1 or 2, which is characterized in that in the step (3), the temperature of the heated at constant temperature
It is 100-800 DEG C, the time of the heated at constant temperature processing is 1-3 hours.
5. method according to claim 1 or 2, which is characterized in that in the step (3), the temperature of the heated at constant temperature
It is 400-600 DEG C.
6. method according to claim 1 or 2, which is characterized in that in the step (4), the zeolite accounts for the mixing
The 40% of total mass of raw material.
7. method according to claim 1 or 2, which is characterized in that in the step (5), the mixed raw material is carried out
The temperature of roasting is 500-700 DEG C, and the time of the roasting is 1-3h.
8. method according to claim 1 or 2, which is characterized in that in the step (5), the deposit/zeolite control
The shape of nitrogen material is spherical, sheet, bulk or cellular；The water of the addition is the weight of the mixed raw material
10%-50%.
9. the deposit that method described in claim 1-8 any one is prepared/zeolite control nitrogen material is preparing ammonia nitrogen suction
The purposes in enclosure material field.
10. purposes according to claim 9, which is characterized in that the ammonia nitrogen absorption material is lake sediment ammonia nitrogen
Release resistance control material.
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| CN113952934B (en) * | 2021-11-08 | 2023-01-24 | 中国环境科学研究院 | Internal load control material for water body mud source |
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| JP3379924B2 (en) * | 1999-10-18 | 2003-02-24 | 株式会社ホクコン | Adsorbent |
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