CN108341459A - The method of phosphorus in the alkali lignin Adsorption water body that a kind of nano lanthanum oxide is modified - Google Patents
The method of phosphorus in the alkali lignin Adsorption water body that a kind of nano lanthanum oxide is modified Download PDFInfo
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- CN108341459A CN108341459A CN201810360444.4A CN201810360444A CN108341459A CN 108341459 A CN108341459 A CN 108341459A CN 201810360444 A CN201810360444 A CN 201810360444A CN 108341459 A CN108341459 A CN 108341459A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4837—Lignin
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The method of phosphorus, soluble in water by alkali lignin in the alkali lignin Adsorption water body being modified the invention discloses a kind of nano lanthanum oxide, and polyethyleneimine and formalin is added, Mannich reaction is carried out under alkaline environment；Products therefrom carries out hydro-thermal reaction using lanthanum chloride as lanthanum in ethanol water again, prepares the alkali lignin of nano lanthanum oxide modification；The alkali lignin that nano lanthanum oxide is modified is added to containing in phosphorus water, the phosphorus in Adsorption water body.The alkali lignin surface for the lanthana modification that the present invention is prepared using hydro-thermal method shows the removal effect significantly excellent to phosphorus and higher cyclic utilization rate there is the active lanthanum adsorption site of high degree of dispersion；And absorption takes short, treatment effeciency height；Used basis material alkali lignin is the waste residue of paper-making pulping process, is derived from a wealth of sources, it is inexpensive, it can be achieved that the treatment of wastes with processes of wastes against one another purpose.The phosphorus that the present invention is applied in removal water body has good economy and environmental benefit.
Description
Technical field
The invention belongs to water-treatment technology field, it is related to a kind of minimizing technology of orthophosphates in water body, and in particular to one
The method that kind utilizes the orthophosphates in the alkali lignin material Adsorption water that nano lanthanum oxide is modified.
Background technology
Phosphorus is one of the limitative nutrient for causing all kinds of surface waters eutrophication.The excessive emissions of phosphorus, on the one hand
Great threat is caused to water quality safety and aquatile, on the other hand exacerbates the scarcity of non-renewable resources phosphorus.Phosphorus exists
There are mainly three types of existing forms in natural water body and waste water, i.e. orthophosphates, polymeric phosphate (including pyrophosphate, inclined phosphorus
Hydrochlorate and polyphosphate) and organically combine phosphate.There is certain transformation, Quadrafos for the phosphorus of these three forms
It can be hydrolyzed to orthophosphates in acid condition, under the action of the biological enzyme of bacterial cell secretion, organophosphor can be with mineralising
For orthophosphates.Therefore, people are more concerned with the removal of orthophosphates in water body.
Absorption method becomes research hotspot as a kind of efficient, low power consuming method for treating water, and water body is removed using absorption method
In phosphorus have many advantages, such as that at low cost, effect is good, recoverable phosphor resource.Absorption method dephosphorization process is simple, reliable for operation, both
Independent disposal unit can be can also be used as the deep treatment method of bioanalysis dephosphorization.Currently, common dephosphorization absorption
The active charcoal of agent, flyash, slag, metal oxide and its composite material etc..
The study found that rare-earth elements of lanthanum is modified through lanthanum with excellent adsorptive selectivity, such as zeolite to phosphorus, to phosphorus
Adsorption capacity increases nearly 10 times, and the removal efficiency of phosphorus can reach 99%；The oxidized lanthanum of clay mineral is modified, phosphor-removing effect
It increases substantially, 93.18%~99.44% is increased to by 6.75%~37.70% before modified.But the oxide of lanthanum due to
Diameter is small, is easy aggregation in water, to generate resistance to mass tranfer, adsorption capacity is caused to decline.
Alkali lignin is also known as lignosulfonates, is a kind of reproducible biomass resource, it derives from papermaking sulfate
Residue in method pulp industry；Abundant oxygen-containing functional group is contained on lignin molecule surface, is conducive to carry out chemistry on its surface
Modification.Pulp and paper industry isolates about 50,000,000 tons or so of industrial lignin by-product, industrial lignin from plant every year
Recycling efficiently chemical industry provides raw material using not being only, and for pushing the development that utilizes of resource ecology that will generate weight
Big meaning.Therefore, the recycling of industrial lignin has great economy and environmental benefit.
It will be applied to the Adsorption of phosphorus in water body after alkali lignin progress lanthana modification processing, have not yet to see correlation
Report.In order to widen the application field of lignin matter resource, accelerate to the high-valued of papermaking residue main component lignin
Using, realize sustainable development and environmentally protective, lanthana is carried on the surface of alkali lignin and in water body by the present invention
The Adsorption of orthophosphates.
Invention content
1. technical problems to be solved
It is lacked for the available effective active adsorption site of lanthana is limited, adsorption time is long, dephosphorization adsorbance is not high
It falls into, the side the purpose of the present invention is to provide a kind of alkali lignin of nano lanthanum oxide modification as phosphorus in adsorbent removal water body
Method.
2. technical solution
The method of phosphorus, is changed with nano lanthanum oxide in the alkali lignin Adsorption water body that the nano lanthanum oxide of the present invention is modified
The alkali lignin of property is as adsorbent, the rapidly and efficiently orthophosphates in Adsorption water body.
The method of phosphorus, includes the following steps in the alkali lignin Adsorption water body that the nano lanthanum oxide is modified：
Step 1, alkali lignin grafting polyethylene imine：
Alkali lignin is according to mass volume ratio 1g：(20-40) ml dissolves in water, sequentially adds polyethyleneimine and formaldehyde,
It is 10.0~11.0 to adjust pH value of solution, and Mannich reaction is carried out after stirring evenly, neutrality is washed to after reaction product cooling, dries
To constant weight, the alkali lignin of grafting polyethylene imine is made；
The preparation for the alkali lignin that step 2, nano lanthanum oxide are modified：
The alkali lignin of grafting polyethylene imine made from step 1 is distributed in ethanol water, be added lanthana or
Its hydrate adjusts pH value of solution to 10.0~11.0, carries out hydro-thermal reaction, fully wash, be dried in vacuo after reaction product cooling,
The alkali lignin that nano lanthanum oxide is modified is made；
Step 3, adsorption and dephosphorization：
The alkali lignin that nano lanthanum oxide made from step 2 is modified is added in staying water, Adsorption orthophosphoric acid
Salt.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, Manny described in step 1
In uncommon reaction, alkali lignin is 1 with the mass ratio of polyethyleneimine and formaldehyde:(0.5~1)：(0.5~1).
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, Manny described in step 1
Uncommon reaction temperature is 40~60 DEG C, the reaction time be 20~for 24 hours.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, the second described in step 2
Alcohol solution is absolute ethyl alcohol and deionized water with 1:3~1:5 (v/v) are formulated.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, the water described in step 2
In thermal response, the alkali lignin of grafting polyethylene imine and the mass ratio of lanthanum chloride are 1:(1~1.5), preferably first in reaction temperature
40~60 DEG C of 3~5h of reaction of degree, then the reaction was continued 20 in room temperature~for 24 hours.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, adjusts pH value of solution and preferably adopt
It is adjusted with the sodium hydroxide solution of 20wt.%.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, waited for described in step 3
Handle a concentration of 30~120P mg/L of the water body containing orthophosphates.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, adsorbent is received in step 3
The alkali lignin of rice lanthana modification is 1 with the mass ratio of phosphate-containing water body:800~2000.
In the alkali lignin Adsorption water body that above-mentioned nano lanthanum oxide is modified in the method for phosphorus, the suction described in step 3
The attached time is 5~10h, and adsorption temp is 25~45 DEG C.
3. advantageous effect
Compared with the prior art, the advantage of the invention is that：
1, there is the activity of high degree of dispersion on the alkali lignin surface for the lanthana modification that the present invention is prepared using hydro-thermal method
Lanthanum adsorption site；Show that the alkali lignin adsorbent after lanthana modification has significant adsorption effect to phosphorus through adsorption experiment,
And effect increases significantly more before modified.Adsorbent more in the prior art has and significantly improves on adsorption effect, in equal conditions
Under, adsorbance 85.47mg P/g (the i.e. 162.2mg P g of phosphorus-1(La)) lanthanum hydroxide (72.80mg P g are significantly better than-1
(La)), zeolite carries lanthanum (24.6mg P/g) and bentonite carries the sorbing materials such as lanthanum (14.0mg P/g).
2, in the prior art, lanthanum-carried sorbing material often has that activated adoption site lanthanum is few, utilization rate is not high lacks
It falls into；And first use Mannich reaction by grafting polyethylene imine to alkali lignin surface in the present invention, then will be aoxidized through hydro-thermal method
Lanthanum is anchored in the abundant amine groups of material surface, and the active lanthanum being prepared exists in the form of nanometer La-OH or La-O, and
And it can be evenly distributed on material surface, more adsorption sites are exposed, mass transport process is promoted, substantially increase absorption effect
Fruit.
3, studies have shown that the alkali lignin that nano lanthanum oxide is modified can realize the phosphorus in quick adsorption water body, and temperature is increased
Degree can effectively improve the removal efficiency of phosphorus；Sorbing material is negligible by the influence degree of aqueous solution ionic strength.
4, basis material alkali lignin is a kind of biological material in the adsorbent that the present invention uses, and the material is renewable,
It derives from a wealth of sources, is the waste residue of paper-making pulping process, it is cheap；The modified obvious processing effect to phosphorus of oxidized lanthanum.
5, in addition, the method for the present invention adsorption treatment mild condition, take it is short, water treatment efficiency can be greatly improved.Therefore, will
The alkali lignin that nano lanthanum oxide is modified is applied to the phosphorus in Adsorption water body, has good economy and environmental benefit.
Description of the drawings
Fig. 1 is the FTIR spectrum figure of the alkali lignin before and after lanthana modification.
As it is shown in the figures, compared to alkali lignin (AL) before modified, after grafting polyethylene imine (PEI),
1656cm-1And 1599cm-1There is the vibration peak and 1125cm of apparent amide groups-1There is the stretching vibration peak of C-N,
The result shows that PEI is successfully grafted on AL；For the alkali lignin (AL-PEI-La) of lanthana modification, in 3609cm-1
And 647cm-1There is the hydroxyl characteristic peak of apparent lanthanum hydroxide, while pure La (OH)3Also occur together in same position
The characteristic peak of sample, the results showed that, La (OH)3Successfully it is sequestered in material surface.
Specific implementation mode
The present invention will be described in detail With reference to embodiment.Changed with lanthana in the specific embodiment
Property alkali lignin as adsorbent, Adsorption is carried out to the phosphorus in water body, absorption is using static batch processed process.However
Implement the concrete mode of the invention being not limited to described in embodiment, any person skilled in the art, in the present invention
It in range, changes or changes using revealed technology contents, to obtain the essentially identical embodiment of effect or side
Method.In every case it is the objective without departing from technical solution of the present invention, to any modification, equivalent or equivalent change made by the embodiment
Change and modification, in the range of still falling within technical solution of the present invention.The scope of the present invention is not limited with specific implementation mode, and
It is defined in the claims.
Embodiment 1
The method of phosphorus, includes the following steps in the alkali lignin Adsorption water body that nano lanthanum oxide is modified：
5.0g alkali lignins are dissolved in 100mL aqueous solutions by step 1, and 4.0g polyethyleneimines (PEI, 99wt.%) are added
With 4.0g formaldehyde (37wt.%) solution, the sodium hydroxide solution of 20wt.% is taken to adjust pH to 10.0~11.0, after stirring evenly
50 DEG C are warming up to, reaction for 24 hours, filters, and washing is repeatedly extremely neutral, and 60 DEG C are dried under vacuum to constant weight, and it is poly- to obtain alkali lignin grafting
Aziridine is denoted as AL-PEI.
Step 2, the absolute ethyl alcohol and distilled water (v/v=1 that 2.0g AL-PEI are added to 100mL:4) mixed solution
In, 3.71g seventy flavors pearl pills are added, takes the sodium hydroxide solution of 20wt.% to adjust pH to 10.0~11.0, is first reacted at 60 DEG C
3h, room temperature are fully washed after reaction product cooling, are dried in vacuo after the reaction was continued for 24 hours, and the alkali wood that nano lanthanum oxide is modified is made
Quality is denoted as AL-PEI-La.
Step 3, the alkali lignin AL-PEI-La being modified using the nano lanthanum oxide synthesized in step 2 is adsorbents, at absorption
Reason contains phosphorus water.Specific adsorption treatment process is as follows：Static Adsorption is carried out in the EPA bottles that 40mL has teflon gasket,
The mass ratio of adsorbent and phosphate-containing water body is 1:2000, pH=6.0, phosphorus initial concentration is 39.27mg P/L, in water body not
Containing NaCl, adsorption temp is 25 DEG C, adsorption time 10h.After adsorption equilibrium, the water phase filter through 45 μ L filters, phosphorus in filtrate
Concentration be measured at 700nm using molybdenum blue colorimetric method.It is 31.54mg P/g to measure adsorbance (in terms of phosphorus).
Comparative example 2
Using the alkali lignin grafting polyethylene imine AL-PEI synthesized in embodiment 1 as adsorbent, the phosphorous water of adsorption treatment
Body.For adsorption conditions with embodiment 1, it is 12.73mg P/g to measure to the adsorbance of phosphorus.
Comparative example 3
Using the alkali lignin in embodiment 1 as adsorbent, adsorption treatment contains phosphorus water.Adsorption conditions are measured with embodiment 1
Adsorbance to phosphorus is 0.17mg P/g.
As it can be seen that load active component lanthana can effectively improve the removal effect of phosphorus in water body.
Embodiment 4
The preparation for the alkali lignin adsorbent that nano lanthanum oxide is modified, includes the following steps：
5.0g alkali lignins are dissolved in 100mL aqueous solutions by step 1, addition 5.0g polyethyleneimines (PEI,
M.W.10000,99wt.%) and 5.0g formaldehyde (37wt.%) aqueous solution, take the sodium hydroxide solution of 20wt.% adjust pH to
10.0~11.0,50 DEG C are warming up to after stirring evenly, reaction for 24 hours, filters, and washing is repeatedly extremely neutral, and 60 DEG C are dried under vacuum to perseverance
Weight obtains alkali lignin grafting polyethylene imine, is denoted as AL-PEI.
Step 2, the absolute ethyl alcohol and distilled water (v/v=1 that 2.0g AL-PEI are added to 100mL:4) mixed solution
In, 4.90g seventy flavors pearl pills are added, takes the sodium hydroxide solution of 20wt.% to adjust pH to 10.0~11.0, is first reacted at 60 DEG C
3h, room temperature are fully washed after reaction product cooling, are dried in vacuo after the reaction was continued for 24 hours, and the alkali wood that nano lanthanum oxide is modified is made
Quality is denoted as AL-PEI-La.
Embodiment 5
As adsorbent, adsorption treatment contains the alkali lignin AL-PEI-La being modified using the nano lanthanum oxide synthesized in embodiment 1
Phosphorus water.Phosphorus initial concentration is 46.72mg P/L, other adsorption conditions study change of the adsorbance with adsorption time with embodiment 1
Law, experimental result measure absorption and reach the time of balance for 60min, and equilibrium adsorption capacity is 37.28mg P/g.
As it can be seen that reaching the time (ACF-LaFe (120min) of adsorption equilibrium compared to other adsorbents of document report
(Chemical Engineering Journal,2013,215-216,859-867.)、ACF-LaOH(360min)
(Chemical Engineering Journal,2012,185–186,160-167.)、MFC@La(OH)(240min)
The order mesoporous hollow silicon ball of (Chemical Engineering Journal, 2018,335,443-449.), lanthanum load
(1440min) (Journal of Materials Chemistry A, 2014,2,8839-8848.)), which can realize
Rapidly and efficiently trapping to phosphorus in water body has significantly excellent performance.
Embodiment 6
The preparation method is the same as that of Example 1 for the alkali lignin that nano lanthanum oxide is modified, and adsorption conditions are essentially identical with embodiment 1,
The difference is that wherein adsorption temp is 35 DEG C, final adsorbent is 32.52mg P/g to the adsorbance of phosphorus.
Embodiment 7
The preparation method is the same as that of Example 1 for the alkali lignin that nano lanthanum oxide is modified, and adsorption conditions are essentially identical with embodiment 1,
The difference is that wherein adsorption temp is 45 DEG C, final adsorbent is 37.37mg P/g to the adsorbance of phosphorus.
As it can be seen that 25~45 DEG C of adsorption temp has preferable removal effect, improves adsorption temp and be conducive to phosphatic suction
Attached removal.
Embodiment 8
The preparation method is the same as that of Example 1 for the alkali lignin that nano lanthanum oxide is modified, and adsorption conditions are essentially identical with embodiment 1,
It is 31.60mg to phosphatic Adsorption amount the difference is that wherein containing the NaCl containing 0.01mol/L in phosphorus water
P/g。
Embodiment 9
The preparation method is the same as that of Example 1 for the alkali lignin that nano lanthanum oxide is modified, and adsorption conditions are essentially identical with embodiment 1,
It is 31.75mg P/ to phosphatic Adsorption amount the difference is that wherein containing the NaCl containing 0.1mol/L in phosphorus water
g。
As it can be seen that the influence for the alkali lignin adsorption and dephosphorization that ionic strength in water body is modified nano lanthanum oxide is little.
Embodiment 10
The preparation method is the same as that of Example 1 for the alkali lignin that nano lanthanum oxide is modified, and adsorption conditions are essentially identical with embodiment 1,
The difference is that wherein the initial concentration of phosphorus is 97.35mg P/L, it is 68.12mg P/g to phosphatic Adsorption amount.
Embodiment 11
With embodiment 10, wherein containing the CO containing 100mg/L in phosphorus water3 2-, it is to phosphatic Adsorption amount
67.34mg P/g。
Embodiment 12
With embodiment 10, wherein containing the CO containing 200mg/L in phosphorus water3 2-, it is to phosphatic Adsorption amount
65.13mg P/g。
Embodiment 13
With embodiment 10, wherein containing the CO containing 300mg/L in phosphorus water3 2-, it is to phosphatic Adsorption amount
64.05mg P/g。
As it can be seen that adsorbent to the Adsorption amount of phosphorus with CO3 2-The increase of concentration and slightly reduce, but influence little.
Embodiment 14
The alkali lignin preparation method that nano lanthanum oxide is modified is with embodiment 4, and adsorption conditions are with embodiment 10, wherein phosphorous
HCO containing 100mg/L in water body3 -, it is 67.42mg P/g to phosphatic Adsorption amount.
Embodiment 15
With embodiment 14, wherein containing the HCO containing 200mg/L in phosphorus water3 -, it is to phosphatic Adsorption amount
65.72mg P/g。
Embodiment 16
With embodiment 14, wherein containing the HCO containing 300mg/L in phosphorus water3 -, it is to phosphatic Adsorption amount
63.50mg P/g。
As it can be seen that adsorbent to the Adsorption amount of phosphorus with HCO3 -The increase of concentration and slightly reduce, but influence little.
Embodiment 17
With embodiment 10, wherein containing the SO containing 100mg/L in phosphorus water4 2-, it is to phosphatic Adsorption amount
67.67mg P/g。
Embodiment 18
With embodiment 10, wherein containing the SO containing 200mg/L in phosphorus water4 2-, it is to phosphatic Adsorption amount
66.85mg P/g。
Embodiment 19
With embodiment 10, wherein containing the SO containing 300mg/L in phosphorus water4 2-, it is to phosphatic Adsorption amount
64.43mg P/g。
As it can be seen that adsorbent to the Adsorption amount of phosphorus with SO4 2-The increase of concentration and slightly reduce, but influence little.
Claims (7)
1. the method for phosphorus, includes the following steps in the alkali lignin Adsorption water body that a kind of nano lanthanum oxide is modified：
Step 1, alkali lignin grafting polyethylene imine：
Alkali lignin is according to mass volume ratio 1g：(20~40) ml dissolves in water, sequentially adds polyethyleneimine and formaldehyde, adjusts
PH value of solution is 10.0~11.0, and Mannich reaction is carried out after stirring evenly, neutrality is washed to after reaction product cooling, is dried to perseverance
The alkali lignin of grafting polyethylene imine is made in weight；
The preparation for the alkali lignin that step 2, nano lanthanum oxide are modified：
The alkali lignin of grafting polyethylene imine made from step 1 is distributed in ethanol water, lanthana or its water is added
Object is closed, pH value of solution is adjusted to 10.0~11.0, carries out hydro-thermal reaction, fully wash, be dried in vacuo after reaction product cooling, be made
The alkali lignin that nano lanthanum oxide is modified；
Step 3, adsorption and dephosphorization：
The alkali lignin that nano lanthanum oxide made from step 2 is modified is added in staying water, Adsorption orthophosphates.
2. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is that Mannich reaction temperature described in step 1 is 40~60 DEG C, the reaction time be 20~for 24 hours.
3. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is that the ethanol water described in step 2 is absolute ethyl alcohol and deionized water with 1:3~1:5v/v is formulated.
4. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is, in the hydro-thermal reaction described in step 2, the alkali lignin of grafting polyethylene imine and the mass ratio of lanthanum chloride are 1:(1
~1.5), first in 40~60 DEG C of reaction temperature, 3~5h of reaction, then the reaction was continued 20 in room temperature~for 24 hours.
5. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is, a concentration of 30~120P mg/L of the staying water described in step 3 containing orthophosphates.
6. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is that the mass ratio of the alkali lignin that adsorbent nano lanthanum oxide is modified in step 3 and phosphate-containing water body is 1:800~
2000。
7. the method for phosphorus in the alkali lignin Adsorption water body that nano lanthanum oxide according to claim 1 is modified, special
Sign is that the adsorption time described in step 3 is 5~10h, and adsorption temp is 25~45 DEG C.
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| CN109499552A (en) * | 2018-12-20 | 2019-03-22 | 天津科技大学 | A kind of Novel dephosphorization bacteriostatic PP filter core and preparation method thereof |
| CN113491999A (en) * | 2021-07-15 | 2021-10-12 | 哈尔滨工业大学 | Preparation method of lanthanum-modified activated carbon adsorption material |
| CN113522250A (en) * | 2021-07-01 | 2021-10-22 | 广东工业大学 | Magnesium-nitrogen-doped eutectic solvent-based lignin adsorption material and preparation method and application thereof |
| CN113750964A (en) * | 2021-09-24 | 2021-12-07 | 哈尔滨工业大学 | Preparation method of lanthanum-loaded graphene aerogel phosphorus adsorbent |
| CN114522673A (en) * | 2022-04-12 | 2022-05-24 | 四川大学 | Application of alkali lignin adsorbent in adsorption of actinide heavy metals |
| CN115656282A (en) * | 2022-10-28 | 2023-01-31 | 湖北理工学院 | Lanthanum-loaded air cathode microbial fuel cell type phosphorus sensor |
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| CN109433153A (en) * | 2018-11-19 | 2019-03-08 | 浙江农林大学 | A kind of lignin porous charcoal and its preparation method and application that Nano-lanthanum hydroxide is modified |
| CN109433153B (en) * | 2018-11-19 | 2021-10-22 | 浙江农林大学 | Nano lanthanum hydroxide modified lignin porous carbon and preparation method and application thereof |
| CN109482148A (en) * | 2018-11-29 | 2019-03-19 | 台州学院 | A kind of preparation method and application of Solidago Canadensis charcoal base dephosphorization adsorbent |
| CN109499552A (en) * | 2018-12-20 | 2019-03-22 | 天津科技大学 | A kind of Novel dephosphorization bacteriostatic PP filter core and preparation method thereof |
| CN113522250A (en) * | 2021-07-01 | 2021-10-22 | 广东工业大学 | Magnesium-nitrogen-doped eutectic solvent-based lignin adsorption material and preparation method and application thereof |
| CN113491999A (en) * | 2021-07-15 | 2021-10-12 | 哈尔滨工业大学 | Preparation method of lanthanum-modified activated carbon adsorption material |
| CN113750964A (en) * | 2021-09-24 | 2021-12-07 | 哈尔滨工业大学 | Preparation method of lanthanum-loaded graphene aerogel phosphorus adsorbent |
| CN114522673A (en) * | 2022-04-12 | 2022-05-24 | 四川大学 | Application of alkali lignin adsorbent in adsorption of actinide heavy metals |
| CN115656282A (en) * | 2022-10-28 | 2023-01-31 | 湖北理工学院 | Lanthanum-loaded air cathode microbial fuel cell type phosphorus sensor |
| CN115656282B (en) * | 2022-10-28 | 2023-09-12 | 湖北理工学院 | Lanthanum-loaded air cathode microbial fuel cell type phosphorus sensor |
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