CN104138750B - A kind of method utilizing embedded type lanthana compound resin deep phosphorous removal - Google Patents
A kind of method utilizing embedded type lanthana compound resin deep phosphorous removal Download PDFInfo
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Abstract
A kind of preparation method of embedded type lanthana compound resin, it is mainly addition strong-base anion-exchange resin in lanthanum nitrate hexahydrate, it is sufficiently stirred for reaction, filter and resin is placed in sodium hydroxide solution to react under constant temperature and then filter, it is washed till neutrality, after heat treatment obtain embedded type lanthana compound resin；Use above-mentioned embedded type lanthana compound resin phosphorus removing method, it is that above-mentioned compound resin is placed in glass adsorption column, controlling the wastewater temperature by phosphate contamination at 10 DEG C 50 DEG C, pH is 2 10, with downstream through the fixed bed column adsorbent equipment being filled with sorbing material；When water outlet phosphate concn is higher than 0.5mg/L, using NaOH to be desorbed with NaCl mixed solution, after desorption, sorbing material can recycle.When in polluted-water containing coexisting ions such as substantial amounts of sulfate radical, chlorion, nitrate anions, after processing through lanthana compound resin of the present invention, the phosphate of phosphorus-containing wastewater can be reduced to below town sewage discharge standard, and not result in secondary pollution.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, phosphatic method in particularly a kind of purification water.
Background technology
Phosphorus is a kind of rich nutritive material, mostlys come from the various raw material of industry, agricultural residue, washing agent etc..If phosphorus contains in water body
Amount exceeds standard serious, can cause the eutrophication of water body, cause algal bloom, fish mortality, and make water body smelly,
It directly or indirectly is detrimental to health.
At present, process phosphate from sewage Technical comparing both at home and abroad ripe, mainly have chemical method, bioanalysis and artificial swamp method.
Chemical method mainly has chemical precipitation method, ion exchange, the method such as counter-infiltration, electrodialysis, counter-infiltration, absorption, and chemical method dephosphorization is imitated
Rate is higher, can generate the sedimentary method of difficultly-soluble phosphates with phosphate radical mainly by medicament molysite, aluminium salt and lime etc. and remove
Phosphorus in waste water.This method has good effect for phosphorous higher waste water.In the relatively low waste water of phosphorus concentration, chemical agent
Consumption is very uneconomical greatly, and another shortcoming is that the precipitating sludge water content producing is big, dehydration difficulty, and residue gold in waste water
Belong to ion, easily cause secondary pollution.Bioanalysis dephosphorization is simple to operate, is to utilize to bite phosphorus bacterium alternately fortune under aerobic and anaerobic condition
Row realizes dephosphorization, but dephosphorization efficiency is very low.Artificial swamp method is inexpensive efficiently, but technology is also immature, and many-side has
Wait to inquire into research.
Nano lanthanum oxide is the class novel rare-earth metal material growing up in recent decades.Recent literature is reported, lanthana is
The sorbing material of a kind of excellent performance, particularly nano-scale structure material more show bigger adsorption capacity and stronger reaction
Activity.At present, numerous studies show: nano lanthanum oxide and anion phosphate, arsenate etc. can form kernel coordination,
Show extremely strong absorption property.But regrettably nano lanthanum oxide is presented in inorganic particle, directly apply to post absorption
Or other fluidised form systems often produce higher pressure drop, there is separation of solid and liquid difficulty, the big application bottleneck of fluid resistance, it is difficult to
Actual application.
In recent years, nano particle is supported and prepares loaded feature capability sorbing material in porous carrier surface and become solution by researcher
Certainly one of important means of this application bottleneck, most typical carrier such as activated carbon, silica gel, molecular sieve, high molecular polymer etc..
The method fully effectively realizes inorganic particle immobilization, simultaneously inorganic adsorbent by carrier bulky grain characteristic and nano-pore template effect
The peculiar absorption property of material is applied, thus overcomes inorganic adsorbing material and separate difficulty, the big technology disadvantage of post pressure.But should
Class compound resin carrier function power is more single, slips into particle and often there is granule partial reunion, grows phenomenon, thus cause work(
Can sorbing material nanometer small-size effect lack, work adsorption capacity is low waits application bottleneck.
Content of the invention
Present invention aim at providing a kind of embedded type that utilizes can to trace amounts of phosphorus hydrochlorate in waste water with excellent purifying property to aoxidize
The method of lanthanum compound resin deep phosphorous removal.The present invention is mainly with conventional strong-base anion-exchange resin as matrix, with lanthana
For function adsorbent, the two organic composite becomes nanocomposite, utilizes the specific selectivity that phosphate is had by this material
Method with phosphorus in efficient absorption ability deep purifying water.
Technical scheme is as follows:
1st, embedded type lanthana compound resin is prepared:
With lanthanum nitrate as presoma, being dissolved in the aqueous solution, the mass fraction of its content is 5%-45%, then adds strong
Alkalescence anion-exchange resin, addition is 10-50g/L, is sufficiently stirred for reacting 10-12h in 40-60 DEG C, makes lanthanum nitrate salt progressively
Diffuse to anion exchange resin inner surfaces of pores, then filter and resin is placed in the NaOH that mass fraction is 5%～15%
Solution reacts under normal temperature 10-18 hour, refilters, with clear water, resin is washed till neutrality, at 40-60 DEG C, be heat-treated 5-10h,
Obtaining embedded type lanthana compound resin, the loading of its nano lanthanum oxide is 6.5%-50%.Described strong alkalinity anion exchange tree
Fat can for D201 (Hangzhou win honour for Industry Co., Ltd produce), 201x7 (sky tunami letter resin Science and Technology Ltd. produce),
The resins such as D202 (production of Hebei resin processing plant of National Olympic) or A600 (Piao Laite Internaional, Inc of Britain).
2nd, above-mentioned embedded type lanthana compound resin phosphorus removing method is used: above-mentioned compound resin is placed in glass adsorption column, will be subject to
The concentration of phosphate contamination is 1-10mg/L (in terms of P) waste water, and temperature controls at 10 DEG C-50 DEG C, and pH controls at 2-10 model
In enclosing, with 10～50BV/h flow velocity downstream through the fixed bed column adsorbent equipment being filled with sorbing material, can be by by phosphate contamination
Water high-efficient purification, water outlet is less than the total phosphorus limit of defined in urban wastewater treatment firm pollutant emission standard (GB18918 2002)
Value (0.5mg/L).When water body in water exists substantial amounts of sulfate radical, chlorion, during the coexisting ion such as nitrate anion, use this method
Remaining to keep bigger adsorption capacity and higher selectivity, competing ions concentration can be the 0-400 (mol ratio) of phosphate concn
Times.
3rd, the regeneration of embedded type lanthana compound resin: when water outlet phosphate concn higher than 0.5mg/L when, use NaOH with
NaCl mixed solution is desorbed, and wherein NaOH concentration is 4%-8%, and NaCl concentration is 3%-10%, and control regeneration velocity is
1-3BV/h, temperature 5 DEG C～50 DEG C, can regenerate completely through 2-5BV desorption reaction, regenerative process can be carried out in adsorption column,
After regeneration, sorbing material i.e. need to be can be recycled to neutrality by clear water flushing.Described clear water can use deionized water, distilled water,
Underground water and natural water.
Strong-base anion-exchange resin is a kind of spherical high molecular polymer, and traditional carrier such as activated carbon, silica gel, molecule
The advantages such as sieve, diatomite etc. are compared, and it is good that it has mechanical strength, and physicochemical property is stable, and resistance to chemical attack is strong.In addition its
Positively charged season amino-functional group is contained on surface, has surfactant-like regulating and controlling effect, can change the micro-electricity of nano-pore
Environment, thus promote embedded lanthana nano particle dispersion and morphogenesis, promotes compound resin work absorption property, and
Realize phosphatic deep purifying and security control in water eventually.
The present invention compared with prior art has the advantage that
(1) with strong-base anion-exchange resin for carrier material, inorganic nanoparticles fluid resistance is efficiently solved big, solid
Liquid separates the technical bottleneck of difficulty.Specific to its surface, charged functional group (such as quaternary ammonium group) can significantly improve nano lanthanum oxide
Particle inner surface dispersity, significantly enhances to phosphatic absorption property, compares performance with the carrier type compound resin of routine
Go out obvious advantage.This material and proprietary dephosphorization Resin A RSENX of Piao Lante company of BritainNPPerformance boost more than 8 times,
Nearly with conventional ion exchanger resin performance boost 100 times, be that the best dephosphorization adsorption material of post adsorption applications performance reported by current document
One of material.
(2) using nano lanthanum oxide as function inorganic adsorbing material, its distinctive nanostructured makes it than general inorganic adsorbent
Show bigger specific surface area and reactivity.When containing substantial amounts of sulfate radical in polluted-water, chlorion, nitrate anion etc. coexists
During ion, the present invention remains to be reduced to the phosphate of phosphorus-containing wastewater below town sewage discharge standard, and effect is notable.
(3) resin carrier distinctive polystyrene cross-linked structure characteristic has mesh confinement effect, than conventional activated carbon,
The through porous carriers material such as clay more can effectively suppress the loss of nano lanthanum oxide, prevents secondary pollution, has higher
Stability.
Brief description
Fig. 1 is the scanning electron microscope (SEM) photograph of the embedded lanthana compound resin that the embodiment of the present invention 3 prepares.
Fig. 2 is the prepared embedded lanthana compound resin of the embodiment of the present invention 8 and dephosphorization Resin A RSENXNPAdsorption and dephosphorization
Post absorption property comparison diagram.
Detailed description of the invention
Embodiment 1
25g is as carrier material, by it to take D201 type anion exchange resin (Hangzhou win honour for Industry Co., Ltd produce)
Being placed in 2.5L and containing in 5% lanthanum nitrate aqueous solution, control reaction temperature is 40 DEG C, is sufficiently stirred for reacting 10h, makes La progressively
Diffuse to anion exchange resin inner surfaces of pores.Then resin filter is placed in the hydroxide that 1500mL mass fraction is 5%
Carrying out in-situ precipitate reaction in sodium solution under normal temperature, the control precipitation reaction time is 10h, after reaction completes, filters and at 40 DEG C
Heat treatment 5h, thus obtain embedded nano lanthanum oxide compound resin, as it is shown in figure 1, its loading is 6.5%.
Be placed in above-mentioned for 3mL compound resin in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=1.5mg/L and
SO4 2-=200mg/L, Cl-=100mg/L, NO3 -=160mg/L, pH=5) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 15 DEG C, flow velocity 10BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 15000BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 2200BV, conventional cloudy
Ion exchange resin is only 150BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 10mL
4%NaOH and 3%NaCl mixed solution, control regeneration velocity is 1BV/h, and temperature 5 DEG C can be complete through 2BV desorption reaction
Full regeneration.Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can be continuing with to neutrality.
Embodiment 2
Taking 201x7 type anion exchange resin (tunami great resin Science and Technology Ltd. in sky produces) 50g, will as carrier material
It is placed in 1000mL and contains in 10% lanthanum nitrate aqueous solution, and control reaction temperature is 60 DEG C, is sufficiently stirred for reacting 12h, makes
La progressively diffuses to anion exchange resin inner surfaces of pores.It is 10% that resin filter is then placed in 2000mL mass fraction
Sodium hydroxide solution in carry out in-situ precipitate reaction under normal temperature, the control precipitation reaction time is 12h, after reaction completes, filters simultaneously
Being heat-treated 8h at 60 DEG C, thus obtaining embedded type nano lanthanum oxide compound resin, its loading is 22.31%.
It is placed in above-mentioned for 5mL compound resin in glass adsorption column (ф 20 × 420mm) by phosphate-containing surface water (P=10mg/L
And SO4 2-=180mg/L, Cl-=200mg/L, NO3 -=220mg/L, pH=10) from top to bottom downstream through equipped with compound resin
Adsorption column, temperature controls at 50 DEG C, flow velocity 50BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity reaches 10000BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 1000BV, conventional cloudy from
Sub-exchange resin is only 100BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 150mL5%NaOH
With 5%NaCl mixed solution, control regeneration velocity is 3BV/h, and temperature 35 DEG C can regenerate completely through 5BV desorption reaction.
Desorption rate is up to 99%.Compound resin adsorbent running water cleaning after regeneration can be continuing with to neutrality.
Embodiment 3
Taking D202 (production of Hebei resin processing plant of National Olympic) 20g as carrier material, being placed on 2L, to contain 35% lanthanum nitrate water-soluble
In liquid, control reaction temperature is 55 DEG C, is sufficiently stirred for reacting 11h, makes La progressively diffuse in anion exchange resin duct
Surface.Then resin filter is placed in the sodium hydroxide solution that 2000mL mass fraction is 15% carrying out under normal temperature sinking in situ
Forming sediment and reacting, the control precipitation reaction time is 12h, after reaction completes, filters and is simultaneously heat-treated 5h at 55 DEG C, thus obtain embedded
Nano lanthanum oxide compound resin, as it is shown in figure 1, its loading is 18.5%.
Be placed in above-mentioned for 4mL composite in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=4mg/L and
SO4 2-=200mg/L, Cl-=200mg/L, NO3 -=260mg/L, pH=6) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 20 DEG C, flow velocity 10BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 3500BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 270BV, conventional cloudy from
Sub-exchange resin is only 60BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 200mL5%NaOH
With 3%NaCl mixed solution, control regeneration velocity is 1BV/h, and temperature 25 DEG C can regenerate completely through 5BV desorption reaction.
Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can be continuing with to neutrality
Embodiment 4
30g is as carrier material, by it to take D201 type anion exchange resin (Hangzhou win honour for Industry Co., Ltd produce)
Be placed in 750mL and contain in 45% lanthanum nitrate aqueous solution, control reaction temperature be 50 DEG C, be sufficiently stirred for react 12h, make La by
Step diffuses to anion exchange resin inner surfaces of pores.Then resin filter is placed in the hydrogen that 1800mL mass fraction is 12%
Carrying out in-situ precipitate reaction in sodium hydroxide solution under normal temperature, the control precipitation reaction time is 18h, after reaction completes, filters and in 45
Being heat-treated 10h at DEG C, thus obtaining embedded nano lanthanum oxide functional resin, its loading is 36.5%.
Be placed in above-mentioned for 3mL compound resin in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=1mg/L and
SO4 2-=100mg/L, Cl-=100mg/L, NO3 -=100mg/L, pH=4) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 50 DEG C, flow velocity 10BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 18000BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 3200BV, conventional cloudy
Ion exchange resin is only 180BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 200mL
8%NaOH and 10%NaCl mixed solution, control regeneration velocity is 5BV/h, and temperature 50 C, through 5BV desorption reaction
Regenerate completely.Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can be continuing with to neutrality.
Embodiment 5
50g is as carrier material, by it to take D201 type anion exchange resin (Hangzhou win honour for Industry Co., Ltd produce)
Be placed in 2.5L and contain in 30% lanthanum nitrate aqueous solution, control reaction temperature be 60 DEG C, be sufficiently stirred for react 10h, make La by
Step diffuses to anion exchange resin inner surfaces of pores.Then resin filter is placed in the hydrogen that 1500mL mass fraction is 13%
Carrying out in-situ precipitate reaction in sodium hydroxide solution under normal temperature, the control precipitation reaction time is 10h, after reaction completes, filters and in 60
Being heat-treated 10h at DEG C, thus obtaining embedded nano lanthanum oxide functional resin, its loading is 50%.
Be placed in above-mentioned for 5mL compound resin in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=5mg/L and
SO4 2-=200mg/L, Cl-=200mg/L, NO3 -=200mg/L, pH=7) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 10 DEG C, flow velocity 50BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 7500BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 800BV, conventional cloudy from
Sub-exchange resin is only 75BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 100mL5%NaOH
With 8%NaCl mixed solution, control regeneration velocity is 3BV/h, and temperature 25 DEG C can regenerate completely through 5BV desorption reaction.
Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can be continuing with to neutrality.
Embodiment 6
Measure D202 type anion exchange resin (production of Hebei resin processing plant of National Olympic) 20g and, as carrier material, be placed on 0.5L
Containing in 28% lanthanum nitrate aqueous solution, control reaction temperature is 50 DEG C, is sufficiently stirred for reacting 11h, makes La progressively spread Zhiyin
Ion exchange resin inner surfaces of pores.Then resin filter is placed in the sodium hydroxide solution that 1800mL mass fraction is 5%
Carrying out in-situ precipitate reaction under normal temperature, the control precipitation reaction time is 10h, after reaction completes, filters and is heat-treated 8h at 45 DEG C,
Thus obtaining embedded nano lanthanum oxide functional resin, its loading is 18.9%.
Be placed in above-mentioned for 3mL compound resin in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=2.5mg/L and
SO4 2-=100mg/L, Cl-=150mg/L, NO3 -=160mg/L, pH=5) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 22 DEG C, flow velocity 20BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 12000BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 1800BV, conventional cloudy
Ion exchange resin is only 120BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 130mL
4%NaOH and 10%NaCl mixed solution, control regeneration velocity is 1BV/h, and temperature 5 DEG C, through 3BV desorption reaction
Regenerate completely.Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can be continuing with to neutrality.
Embodiment 7
Taking 201x7 type anion exchange resin (tunami great resin Science and Technology Ltd. in sky produces) 90g, will as carrier material
It is placed in 2500mL and contains in 15% lanthanum nitrate aqueous solution, and control reaction temperature is 40 DEG C, is sufficiently stirred for reacting 10h, makes
La progressively diffuses to anion exchange resin inner surfaces of pores.It is 15% that resin filter is then placed in 1000mL mass fraction
Sodium hydroxide solution in carry out in-situ precipitate reaction under normal temperature, the control precipitation reaction time is 12h, after reaction completes, filters simultaneously
Being heat-treated 10h at 60 DEG C, thus obtaining embedded type nano lanthanum oxide functional resin, its loading is 42.3%.
It is placed in above-mentioned for 5mL compound resin in glass adsorption column (ф 20 × 420mm) by phosphate-containing surface water (P=3mg/L
And SO4 2-=250mg/L, Cl-=250mg/L, NO3 -=220mg/L, pH=3) from top to bottom downstream through equipped with compound resin
Adsorption column, temperature controls at 45 DEG C, flow velocity 10BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity reaches 14800BV.After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.Use 50mL8%NaOH
With 5%NaCl mixed solution, control regeneration velocity is 1BV/h, and temperature 50 C can regenerate completely through 3BV desorption reaction.
Desorption rate is up to 99%.Compound resin adsorbent running water cleaning after regeneration can be continuing with to neutrality.
Embodiment 8
Take D202 anion exchange resin (production of Hebei resin processing plant of National Olympic) 10g, as carrier material, to be placed on 1L and contain
In 5% lanthanum nitrate aqueous solution, control reaction temperature is 50 DEG C, is sufficiently stirred for reacting 12h, makes La progressively diffuse to anion and hands over
Change resin inner surfaces of pores.Then resin filter is placed in normal temperature in the sodium hydroxide solution that 1000mL mass fraction is 15%
Under carry out in-situ precipitate reaction, the control precipitation reaction time is 18h, after reaction completes, filters and is simultaneously heat-treated 10h at 50 DEG C,
Thus obtaining embedded nano lanthanum oxide functional resin, its loading is 6.5%.
Be placed in above-mentioned for 3mL compound resin in glass adsorption column (ф 12 × 220mm) by phosphorous water body (P=3mg/L and
SO4 2-=200mg/L, Cl-=200mg/L, NO3 -=200mg/L, pH=6.1) from top to bottom downstream through the suction equipped with compound resin
Attached column, temperature controls at 15 DEG C, flow velocity 50BV/h, and after sorbent treatment, water outlet phosphate concn is at below 0.5mg/L,
Treating capacity is up to 9800BV, Piao Lante company of Britain ARSENX under the conditions of being somebody's turn to doNPDisposal ability is only 600BV, conventional cloudy from
Sub-exchange resin is only 150BV (as shown in Figure 2).After substantially leakage (P > 0.5mg/L) occurs in absorption, stop absorption.
With 180mL8%NaOH and 10%NaCl mixed solution, control regeneration velocity is 2BV/h, temperature 50 C, through 5BV desorption
Reaction can regenerate completely.Desorption rate is up to 99%.Compound resin adsorbent deionized water cleaning after regeneration can continue to neutrality
Continuous use.
Claims (6)
1. the method utilizing embedded type lanthana compound resin deep phosphorous removal, it is characterised in that: with nitric acid
Lanthanum is presoma, is dissolved in the aqueous solution, and the mass fraction of its content is 5%-45%, then adds
Strong-base anion-exchange resin, addition is 10-50g/L, is sufficiently stirred for reacting 10-12h in 40-60 DEG C,
Then filter and resin is placed in the sodium hydroxide solution that mass fraction is 5%～15% and react under normal temperature
10-18 hour, refilters, and with clear water, resin is washed till neutrality, is heat-treated 5-10h, obtains at 40-60 DEG C
Obtaining embedded type lanthana compound resin, the loading of its nano lanthanum oxide is 6.5%-50%, is combined above-mentioned
Resin is placed in glass adsorption column, controls the wastewater temperature by phosphate contamination at 10 DEG C-50 DEG C, and pH is controlled
System, in the range of 2-10, is inhaled downstream through the fixed bed column being filled with sorbing material with 10～50BV/h flow velocity
Adsorption device.
2. the method utilizing embedded type lanthana compound resin deep phosphorous removal according to claim 1, its
It is characterised by: described strong-base anion-exchange resin is D201,201x7 or D202.
3. the method utilizing embedded type lanthana compound resin deep phosphorous removal according to claim 1, its
It is characterised by: described the concentration by phosphate contamination waste water is calculated as 1-10mg/L, competing ions concentration with P
It is 0-400 mole times of phosphate concn.
4. the method utilizing embedded type lanthana compound resin deep phosphorous removal according to claim 1, its
It is characterised by: when water outlet phosphate concn is higher than 0.5mg/L, use NaOH to take off with NaCl mixed solution
Attached, wherein NaOH concentration is 4%-8%, and NaCl concentration is 3%-10%, and control regeneration velocity is 1-3BV/h,
Temperature 5 DEG C～50 DEG C, can be desorbed completely through 2-5BV desorption reaction, and after desorption, sorbing material need to be rushed by clear water
It is washed till neutrality i.e. to can be recycled.
5. embedded type lanthana compound resin phosphorus removing method according to claim 4, it is characterised in that:
Described clear water uses deionized water, distilled water, running water or underground water.
6. the embedded type lanthana compound resin phosphorus removing method according to claim 4 or 5, its feature exists
In: regenerative process is carried out in adsorption column.
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|---|---|---|---|---|
| CN110026161A (en) * | 2019-04-11 | 2019-07-19 | 南京大学 | A kind of polymer-based nano hydrous zirconia gel material, crystal form and crystallinity regulation method, application and regeneration method |
| CN110026161B (en) * | 2019-04-11 | 2022-03-15 | 南京大学 | Polymer-based nano lanthanum oxide hydrate material, crystal form and crystallinity regulating and controlling method, application and regeneration method |
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