CN108499541B - A kind of titanium sulfate-chitosan compounding filter aid and preparation method thereof - Google Patents
A kind of titanium sulfate-chitosan compounding filter aid and preparation method thereof Download PDFInfo
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0211—Compounds of Ti, Zr, Hf
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0281—Sulfates of compounds other than those provided for in B01J20/045
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- 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
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
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- B01J20/28007—Sorbent size or size distribution, e.g. particle size with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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Abstract
The invention discloses a kind of titanium sulfate-chitosans to compound filter aid preparation method, configure the titanium sulfate aqueous slkali of certain mass score, under certain pH conditions, it is slowly dropped to the chitosan acid solution that mass percent concentration is 1 ~ 5%, constant temperature strong stirring reacts certain time, mixed system is stored at room temperature curing certain time, freeze-drying obtains titanium sulfate-chitosan compounding filter aid, also discloses filter aid and its application of this method preparation.Titanium sulfate of the invention-chitosan compounding filter aid is compared with chitosan filter aid, by Ti4+It is introduced into chitosan molecule structure, enriches the cation group on chitosan, enhance the ability of electronegativity suspended particles in chitosan charge neutrality water.The composite filter aid product have many advantages, such as stability it is good, to the charge neutrality and adsorption bridging effect of colloidal substance, strong cross that filter effect is good, applied widely, to go out water quality good.
Description
Technical field
The invention belongs to water process intensive filtration technical fields, and in particular to a kind of titanium sulfate-chitosan compounding filter aid
And preparation method thereof.
Background technique
Conventional water water treatment filtration process is divided into the suspension that suspended particulate migrated and moved to filter material surface to filter material surface
Particle sticks two processes by filtrate, and wherein Mechanism of Adhesion is divided into two kinds: after reaching filter material surface one is suspended particulate substance,
When Van der Waals force between particle and filtrate is greater than the repulsive force of electric double layer, suspended matter attaches to filter material surface by Van der Waals force；Separately
One is suspended particulate substances to attach on filtrate by the bridging action of high molecular polymer.As it can be seen that the preceding hydrochemistry characteristic of filter,
Solid suspension, filter material surface surface nature (surface charge, surface force etc.) be influence filter performance crucial effect
Factor.
Quadratic micro-flocculation technique filtering technique changes suspended particulate substance in water by adding filter aid in water to before filtering
Chemical property, make it easier for contacting with filtrate and stick, to improve the processing capacity in filter tank, improve effluent quality.
Chitosan (Chitosan, CTS) is straight chain polymer compound of polysaccharide, hydroxyl and amino rich in and one
A little N- acetylamino isopolarity groups, are drunk extensively in various fields such as medicine, food, agricultural, environmental protection.Meanwhile because of it
From a wealth of sources, Nantural non-toxic, environmental-friendly characteristic are used as food additives by Food and Drug Administration's approval, by the U.S.
Environmental Protection Agency ratifies the cleanser as drinking water.But chitosan is limited to organic matter removal effect in quadratic micro-flocculation filtering,
And in acid condition, CTS can be protonated aobvious electropositive because of amino, be macromolecule cation polymer, in intensive filtration side
There is certain advantage in face, but under alkalinity and neutrallty condition, protonated amino is suppressed, and intensive filtration is ineffective.
In recent years, scientist is to titanium salt water treatment agent the study found that compared with traditional medicament, and titanium salt is to the turbid of water
Degree, organic matter have better removal effect, and titanium salt flocculant process effluent quality is good, and adaptation pH is in extensive range, settling of floccus
Performance is good, has good removal effect to low temperature and low turbidity water.Meanwhile the sludge of generation can prepare TiO2 light by processing recycling and urge
Agent is, it can be achieved that titanium recycles.Titanium is nontoxic, has good biocompatibility with skeleton, blood, can effectively reduce aluminium
Salt medicament application toxicity and solve the problems, such as " brightness reversion " caused by molysite medicament.
Summary of the invention
It is an object of the invention to be directed in existing quadratic micro-flocculation agent intensive filtration there are problem, provide a kind of with height
Effect, titanium sulfate-chitosan compounding filter aid of safety and environmental friendliness and preparation method thereof, can be used as filter aid for drinking water
Intensive filtration quadratic micro-flocculation technology.
To achieve the above object the present invention adopts the following technical scheme:
The titanium sulfate-chitosan compounding filter aid preparation method, feature include the following steps: to configure certain mass point
It is molten to be slowly dropped to the chitosan acid that mass percent concentration is 1 ~ 5% under certain pH conditions for several titanium sulfate aqueous slkalis
Mixed system is stored at room temperature curing certain time by liquid, constant temperature strong stirring certain time, and freeze-drying obtains titanium sulfate-shell
Glycan compounds filter aid.
According to the above scheme, the preparation method of the titanium sulfate aqueous slkali is: alkali is added in the titanium sulfate for weighing certain mass
In solution, NaH is then added2PO4, stirring until solution in colorless and transparent, wherein the mass ratio of the quality of titanium sulfate and water be 1 ~
10:100.
According to the above scheme, the aqueous slkali is the NaHCO of mass fraction 1 ~ 5%3Solution, NaH2PO4For mass fraction 5%
Solution.
According to the above scheme, the preparation method of the chitosan acid solution is: by deacetylation be not less than 85%, it is glutinous equal
Molecular weight is 103~109Chitosan be added acid solution in, ultrasonic vibration 10min makes it sufficiently be dissolved as transparent milk yellow molten
Liquid, wherein the weight ratio of chitosan and water is 1 ~ 5:100.
According to the above scheme, the acid solution is mass fraction 0.5-1% dilute hydrochloric acid.
The titanium sulfate-chitosan compounding filter aid preparation method, which is characterized in that in above-mentioned synthesis step, shell
The mass ratio of glycan and titanium sulfate be (1 ~ 5): (1 ~ 5), reaction pH be 4 ~ 7, reaction temperature be 20 ~ 70 DEG C, the reaction time be 2 ~
6h, curing time are for 24 hours.
According to the present invention preferably, the mass ratio of chitosan and titanium sulfate is (1 ~ 2): (1 ~ 3), and reaction pH is 5 ~ 6, reaction temperature
Degree is 30 ~ 40 DEG C, and the reaction time is 2 ~ 5h.
The present invention is prepared by compounding with titanium metal ions with wider array of to the pH scope of application using chitosan as matrix
The stronger chitosan water process filter aid of cation electrodeposition neutralising capacity.
By taking titanium sulfate, chitosan as an example, related reaction equation are as follows:
The first step are as follows: titanium sulfate hydrolyzes under the conditions of alkaline water, obtains the hydroxo complex of hydroxyl acidification titanium, titanium, simultaneously
Generate a large amount of hydrogen ions.
Ti4++H2O+3OH-=Ti(OH)3(H2O) +
Ti4++ Ti(OH)3(H2O) ++OH-+3H2O= Ti2O (OH)4(H2O)3 2++2H+
Ti4++ Ti2O (OH)4(H2O)3 2++OH-+3H2O= Ti3O2(OH)5(H2O)5 3++2H+
…
[TixOy(OH)z(H2O)m](4x-2y-z)+
Second step are as follows: chitosan hydrolyzes under the conditions of acid water, and protonated amino obtains cation protonated chitosan.
Third step are as follows: protonation chitosan compounds to obtain cationic titanium salt chitosan polymer with titanium salt hydrolysate.
Titanium sulfate prepared by the present invention-chitosan compounds filter aid, and appearance is white powder.
The application of titanium sulfate of the present invention-chitosan compounding filter aid, as a kind of efficient water treatment agent, applied to giving
Water, wastewater treatment, the fields such as sludge reconciliation dehydration, meanwhile, the backwashing water that water treatment agent filtering generates can be used for
Recycle photochemical catalytic oxidation catalyst TiO2, the new outlet of filtering backwash water disposition offer.
The intensive filtration water treatment agent of water supply, wastewater treatment, the titanium sulfate-chitosan compounding filter aid add
Amount is generally in 0.1 ~ 1mg/L, preferably 0.4 ~ 0.8mg/L of dosage.In water supply, waste water intensive filtration processing, sulphur
It is 4 ~ 9 that sour titanium-chitosan compounding filter aid, which is applicable in pH value, and preferably pH value is 6 ~ 8.
Only in acid condition, amino is protonated the property for just having cationic biopolymers, ability to chitosan
Charge neutrality and adsorption bridging effect are played in intensive filtration quadratic micro-flocculation, intensive filtration works well；In neutral and alkalinity
Under the conditions of, charge neutrality effect is very weak, and mainly adsorption bridging acts on, and intensive filtration is ineffective.The present invention introduces titanium sulfate
Chitosan, the hydrogen ion generated in titanium ion hydrolysate and its hydrolytic process improve its cation to suspended matter, glue in water
The charge neutrality and compression double electric layer ability of body, to also expand its applicable pH on the basis of improving quadratic micro-flocculation intensive filtration
Range.
Titanium sulfate of the invention-chitosan compounding filter aid has following excellent results compared with prior art:
1, titanium sulfate of the invention-chitosan compounds filter aid, is using titanium sulfate, chitosan as raw material, two kinds of raw materials take
Material is extensive, green, environmental protection, medicament can be recycled, and compared with traditional secondary tiny flocculation aluminium salt, molysite, strong filter effect of crossing is good,
And coloration caused by aluminium remaining influence health and iron ion residual will not be led to the problem of.
2, titanium sulfate of the invention-chitosan compounding filter aid is compared with chitosan filter aid, by Ti4+It is introduced into chitosan
On molecular structure, the cation group on chitosan is enriched, enhances electronegativity suspended particles in chitosan charge neutrality water
Ability.The composite filter aid product is good with stability, filters effect to the charge neutrality and adsorption bridging effect of colloidal substance, strong cross
The advantages that fruit is good, applied widely, water quality is good out.
3, titanium sulfate of the invention-chitosan compounds filter aid, and dilute hydrochloric acid solution is used to replace conventional second in preparation process
Acid solution carries out the dissolution of chitosan, can effectively avoid because adding water treatment agent or medicament residual, and makes to draw in drinking water
Enter new organic matter, causes to be discharged the raising of DOC content；To mitigate the strong hydrolysis of titanium sulfate, course of dissolution is in alkalinity
NaHCO3Solution neutral and alkali, while NaH is also added in solution2PO4, the hydrogen generated in titanium sulfate hydrolytic process can be effectively relieved
Ion is effectively prevented from the reduction problem because being discharged pH caused by adding titanium sulfate, while it is multiple to also increase titanium sulfate-chitosan
Stability with filter aid.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment
(1) it weighs 5g chitosan solid to be dissolved in about 97mL water, strength magnetic agitation is added dropwise 2.77ml36%'s
Mixed liquor is put into ultrasonic vibration 10min in ultrasonic cleaning machine, it is made sufficiently to be dissolved as transparent milk yellow solution by hydrochloric acid solution,
Obtain the chitosan solution that mass fraction is 5%；
(2) NaHCO of 3g is weighed3Solid is dissolved in stirring in 100ml water and is completely dissolved, and the Ti (SO of 5g is then added4)2
Solid powder and the NaH that 5g is added2PO4, persistently stir 1 hour it is colorless and transparent to solution, obtain mass fraction be 5% titanium sulfate
Solution；
(3) it is 3:1,3:2,1:1,1:2 according to titanium sulfate/chitosan mass ratio, it is molten pipettes a certain amount of above-mentioned titanium sulfate
Chitosan acid solution is slowly added dropwise in liquid, is adjusted to required pH value (5,6,7,8) using 0.1mol/L hydrochloric acid and sodium hydroxide solution,
Respectively in the sufficiently reaction in 3 hours of 30,40,50 DEG C of constant temperature strong stirrings, then mixed system is stored at room temperature and is cured 24 hours, freezing
It is dried to obtain titanium sulfate-chitosan compounding filter aid.
Comparative example 1
(1) it weighs 5g chitosan solid to be dissolved in about 97mL water, strength magnetic agitation is added dropwise 2.77ml36%'s
Mixed liquor is put into ultrasonic vibration 10min in ultrasonic cleaning machine by hydrochloric acid solution, and strength magnetic agitation for 24 hours, is dissolved as it sufficiently
Transparent milk yellow solution obtains the chitosan solution that mass fraction is 5%；
(2) NaHCO of 3g is weighed3Solid is dissolved in stirring in 100ml water and is completely dissolved, and then under ice water water bath condition, adds
Enter the titanium tetrachloride liquid of 5g and the NaH of 5g is added2PO4, persistently stir 1 hour it is colorless and transparent to solution, obtaining mass fraction is
5% titanium tetrachloride solution；
(3) it is 3:2 according to titanium tetrachloride/chitosan mass ratio, pipettes a certain amount of above-mentioned titanium tetrachloride solution, slowly drips
Add chitosan acid solution, pH value 6 is stored at room temperature curing in the sufficiently reaction in 3 hours of 40 DEG C of constant temperature strong stirrings, then by mixed system
24 hours, freeze-drying obtained titanium tetrachloride-chitosan compounding filter aid.
Comparative example 2
The NaH being added without in comparative example 12PO4, change titanium tetrachloride into titanium sulfate, other conditions are constant, and filter aid is made.
Comparative example 3
Titanium sulfate is dissolved in water, chitosan is dissolved in acetic acid, solution is made, will manufactured solution mix after stir 60 minutes,
Whipping temp is 25 DEG C, and crystal is made in drying at 85 DEG C, and crystal is ground into 50 nanometers of nanometer finished product.
Comparative example 4
(1) it prepares precursor liquid chitosan is dissolved in acetic acid solution and be configured to chitosan solution, in 50 DEG C~60 DEG C constant temperature
Under the conditions of, it is slowly added into glutaraldehyde and butyl titanate, and be stirred continuously, it is 6 that sodium hydroxide solution, which is then added, and adjusts pH value,
Continue to stir, obtains the precursor liquid of microwave hydrothermal reaction；It is described to prepare in precursor liquid step, control chitosan structure unit and penta 2
The molar ratio of aldehyde is 1: 3；
(2) microwave hydrothermal reaction moves into above-mentioned gained precursor liquid in the reaction kettle of polytetrafluoroethyllining lining, then will reaction
Kettle, which is put into microwave hydrothermal reaction, carries out hydro-thermal reaction；
(3) post-processing of reaction solution takes out reaction kettle to end of reaction, is filtered, after gained Washing of Filter Cake, in
It is dry under 40 DEG C of constant temperatures, nano-titanium dioxide/chitosan complexes, the mass ratio of chitosan and nano-titanium dioxide is made
For 1:3.
Application example
The titanium sulfate made from embodiment-chitosan compounding filter aid handles humic acid -- Kaolin water sample, and divides
Analyse processing result.
Test water sample preparation method is as follows: weighing 1g humic acid, is added in the NaOH solution of 0.1mol/L, magnetic force stirs
After mixing 2h, 70 DEG C water-bath 24 hours, through 0.45um glass fiber filter filtering after filtrate constant volume it is spare to 1L；Weigh 1g high
Ridge soil, is added 1 L deionized water, and after magnetic agitation 1h, after standing 0.5h, drawing upper layer 500ml solution is used in test
Aqueous suspension ofkaolin.When floc test, is reconciled with nanofiltration water outlet and be made into concentration as 10mg/L humic acid simulated water sample, utilize height
It is 15.0 ± 0.50NTU that ridge soil suspension, which adjusts raw water turbidity, obtains humic acid -- Kaolin water sample.
Humic acid-Kaolin water sample index are as follows: raw water turbidity to be filtered is 2.0 ± 0.50NTU, is 254nm in wavelength
Under absorbance be 0.060 ± 0.005, dissolved organic carbon DOC be 3.00 ± 0.5mg/L.Quadratic micro-flocculation intensive filtration
Effect is with residual turbidity, DOC and UV254Removal rate and filter cycle indicate.
Application example one
By in embodiment filter aid prepare when reaction pH be 6, temperature be 40 DEG C, titanium sulfate/chitosan mass ratio be 3:1,
The titanium sulfate of 3:2,1:1,1:2-chitosan compounding filter aid are applied to humic acid -- at the intensive filtration of Kaolin water sample
Reason.
Processing result is as shown in table 1 below:
When 1 humic acid of table -- Kaolin water sample inlet flow-patterm is 7.5, different titanium sulfates/chitosan mass ratio sulfuric acid
Titanium-chitosan compounding filter aid intensive filtration treatment effect (filter aid dosage is 0.5mg/LCTS)
By the above treatment effect as it can be seen that filter column delivery turbidity increases with titanium sulfate/chitosan mass than reducing first to reduce afterwards,
Reach minimum when titanium sulfate/chitosan mass ratio is 3:2；DOC and UV254Removal situation it is similar with turbidity, titanium sulfate/
Removal efficiency highest, respectively 76.5% when chitosan mass ratio is 3:2,62.3%；In addition, filter cycle is poly- with titanium sulfate/shell
Sugared mass ratio reduces and increases, longest filter cycle when titanium sulfate/chitosan mass ratio is 1:2.It can be seen that titanium sulfate/shell
Glycan mass ratio has a major impact quadratic micro-flocculation intensive filtration effect, and certain titanium sulfate/chitosan mass ratio can optimize
Intensive filtration effect.
Application example two
Titanium sulfate/chitosan mass ratio is 3:2 when prepared by filter aid in embodiment, and temperature is 40 DEG C, pH value in reaction point
Not Wei 5,6,7,8 titanium sulfate-chitosan compound filter aid be applied to humic acid -- at the intensive filtration of Kaolin water sample
Reason.
Processing result is as shown in table 2 below:
When 2 humic acid of table -- Kaolin water sample inlet flow-patterm is 7.5, titanium sulfate-shell under different pH reaction conditions is poly-
Sugar compounding filter aid intensive filtration treatment effect (filter aid dosage is 0.5mg/LCTS)
By the above treatment effect as it can be seen that filter column delivery turbidity first reduces with the increase of pH value when composite reagent increases afterwards, pH
Reach minimum when being 6；DOC and UV254Removal rate reduced with the increase of pH value, pH be 5 when removal efficiency highest, respectively
It is 79.2%, 68.4%.PH value when reducing composite reagent is conducive to the formation of hydrolysis and the amino of chitosan protonation of titanium salt, meeting
Obtain good intensive filtration effect.Meanwhile filter cycle extends with the increase of pH value when composite reagent, pH is most short when being 5
It is 18 hours.It can be seen that pH value has a major impact quadratic micro-flocculation intensive filtration effect when composite reagent, it is a certain range of
Composite reagent pH value ratio can optimize intensive filtration effect.
Application example three
Titanium sulfate/chitosan mass ratio is 3:2, pH value in reaction 6, reaction temperature point when prepared by filter aid in embodiment
Titanium sulfate-chitosan compounding filter aid that Wei be 30,40,50 DEG C is applied to humic acid -- the intensive filtration of Kaolin water sample
Processing.
Processing result is as shown in table 3 below:
When 3 humic acid of table -- Kaolin water sample inlet flow-patterm is 7.5, titanium sulfate-shell under different pH reaction conditions is poly-
Sugar compounding filter aid intensive filtration treatment effect (filter aid dosage is 0.5mg/LCTS)
By the above treatment effect as it can be seen that filter column delivery turbidity first reduces with the increase of medicament reaction temperature increases afterwards, temperature
Reach minimum when being 40 DEG C；DOC and UV254Removal rate first reduce increase afterwards as the temperature increases, gone when temperature is 40 DEG C
Except efficiency highest.In addition, filter cycle increases afterwards with increased first reduce of reaction temperature, most short when temperature is 40 DEG C is 20 small
When.It can be seen that reaction temperature has a major impact quadratic micro-flocculation intensive filtration effect when composite reagent, a certain range of medicine
Agent compounding reaction temperature ratio can optimize intensive filtration effect.
Application example four
Titanium sulfate/chitosan mass ratio is 3:2 when prepared by filter aid in embodiment, and pH value in reaction 6, reaction temperature is
Filter aid made of 40 DEG C of titanium sulfate-chitosan compounding filter aid and comparative example is applied to humic acid -- Kaolin water sample
Intensive filtration processing.
Processing result is as shown in table 4 below:
When 4 humic acid of table -- Kaolin water sample inlet flow-patterm is 7.5, titanium sulfate-chitosan of distinct methods preparation is multiple
With filter aid intensive filtration treatment effect (filter aid dosage is 0.5mg/LCTS)
Claims (6)
1. a kind of titanium sulfate for quadratic micro-flocculation intensive filtration water treatment technology-chitosan compounding filter aid preparation side
Method, it is characterised in that: the titanium sulfate aqueous slkali of configuration certain mass score is slowly dropped to quality hundred under certain pH conditions
Dividing specific concentration is 1 ~ 5% chitosan acid solution, and constant temperature strong stirring reacts certain time, mixed system is stored at room temperature curing
Certain time, freeze-drying obtain titanium sulfate-chitosan compounding filter aid；Acid in the chitosan acid solution is dilute salt
Acid；The mass ratio of chitosan and titanium sulfate is (1 ~ 2): (1 ~ 3), and reaction pH is 5 ~ 6, and reaction temperature is 30 ~ 40 DEG C, the reaction time
For 2 ~ 5h, the curing time is for 24 hours；Wherein, the preparation method of the titanium sulfate aqueous slkali are as follows: weigh the titanium sulfate of certain mass
It is added in aqueous slkali, NaH is then added2PO4, stirring until solution in colorless and transparent, the wherein quality of the quality of titanium sulfate and water
Than for 1 ~ 10:100, the aqueous slkali is the NaHCO of mass fraction 1 ~ 5%3Solution, NaH2PO4For the solution of mass fraction 5%.
2. preparation method according to claim 1, it is characterised in that: the preparation method of the chitosan acid solution is,
It is not less than 85%, viscosity-average molecular weight 10 by deacetylation3~109Chitosan be added acid solution in, ultrasonic vibration 10min, by force
Power magnetic agitation for 24 hours, makes it sufficiently be dissolved as transparent milk yellow solution, and wherein the weight ratio of chitosan and water is 1 ~ 5:100, institute
The acid solution mass fraction stated is 0.5 ~ 1% dilute hydrochloric acid.
3. titanium sulfate-chitosan of the preparation of preparation method described in a kind of one of claim 1-2 compounds filter aid.
4. the titanium sulfate of the preparation of preparation method described in a kind of one of claim 1-2-chitosan compounding filter aid is in water supply, useless
Application in water process.
5. application according to claim 4, it is characterised in that: the titanium sulfate-chitosan compounds filter aid dosage and is
0.1 ~ 1mg/L, it is 4 ~ 9 that titanium sulfate-chitosan compounding filter aid, which is applicable in pH value,.
6. application according to claim 5, it is characterised in that: the titanium sulfate-chitosan compounds filter aid dosage and is
0.4 ~ 0.8mg/L, it is 6 ~ 8 that titanium sulfate-chitosan compounding filter aid, which is applicable in pH value,.
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| CN102962102A (en) * | 2011-09-01 | 2013-03-13 | 中国科学院福建物质结构研究所 | Preparation and application of chitosan/titanium dioxide composite porous ball |
| CN102718281B (en) * | 2012-07-10 | 2013-07-24 | 哈尔滨工业大学 | Method for treating low-temperature low-turbidity high-color water by adopting modified palygorskite flocculation adsorbent |
| CN103041783A (en) * | 2012-12-18 | 2013-04-17 | 陕西宣和通科技发展有限责任公司 | Preparation method of chitosan-Ti02 adsorbent |
| CN103011358B (en) * | 2012-12-20 | 2014-03-05 | 山东大学 | Polymeric titanium sulfate inorganic polymeric flocculant, and preparation method and application of flocculant |
| CN107042095B (en) * | 2017-06-16 | 2019-10-08 | 北京工业大学 | A kind of preparation method and application of chitosan-ferrotitanium compound compound adsorbent |
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