CN109896604A - A kind of PAC-PDMDAAC composite flocculation agent handling the Pihe River water coagulation - Google Patents
A kind of PAC-PDMDAAC composite flocculation agent handling the Pihe River water coagulation Download PDFInfo
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- CN109896604A CN109896604A CN201811516248.8A CN201811516248A CN109896604A CN 109896604 A CN109896604 A CN 109896604A CN 201811516248 A CN201811516248 A CN 201811516248A CN 109896604 A CN109896604 A CN 109896604A
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Abstract
The invention discloses a kind of PAC-PDMDAAC composite flocculation agents for handling the Pihe River water coagulation, be made of following components by weight percent: 200 parts by weight of ultrapure water, aluminium polychloride 20~180,50 parts by weight of polydimethyl diallyl ammonium chloride, the present invention relates to flocculant technical fields.PAC and PDMDAAC coagulant is compound, it is made compound than being 10:1, 30:1, 50:1, 70:1, 90:1PAC-PDMDAAC composite flocculation agent, when compositely proportional is 30:1 or more, the UV254 and turbidity being more advantageous in removal water body, as water sample initial haze < 10NTU, with the increase of PAC-PDMDAAC compound coagulant dosage, the removal rate of UV254 and turbidity is improved, when dosage is 7mg/L, the removal rate and turbidity removal rate of UV254 reaches best, it can achieve 22.45% and 84.64% respectively, under meta-alkalescence and neutral water environment, it is more advantageous to removal of the PAC-PDMDAAC to turbidity, the removal rate of turbidity is 90.06%, But it is unfavorable for UV254 removal, removal rate highest only reaches 35%, and when pH value is 6, UV254 removal rate is larger, and removal rate reaches 58.64%.
Description
Technical field
The present invention relates to flocculant technical field, specially a kind of compound wadding of PAC-PDMDAAC for handling the Pihe River water coagulation
Solidifying agent.
Background technique
At present, aluminium polychloride (PAC) and polydimethyl diallyl ammonium chloride (PDMDAAC) are domestic and international water supply systems
In common coagulant .PAC the advantages of be that it is better than traditional aluminum salt coagulation effect, and than organic polymer coagulation
Still, in terms of form, the degree of polymerization and corresponding cohesion-coagulation effect, PAC is mixed still in tradition aluminium salt by the cheap of agent
Between solidifying agent and organic polymer coagulant, it is poorer than organic polymer coagulant to the adsorption bridging ability of colloidal substance very
It is more, but also in addition in the presence of the instability problem to further hydrolysis, in practical applications, there is more organic by PAC
The disadvantages of sludge quantity that high-molecular coagulant adopting dosage is high, generates is big.PDMDAAC coagulant with molecular weight, stablize by big, product
Property good, strong to the adsorption bridging ability of colloidal substance, applied widely, the few advantage of sludge quantity that generates, and PDMDAAC is
Cationic coagulant, positive charge is stronger, is more advantageous to charge neutrality effect, for inorganic coagulant, PDMDAAC coagulation effect
More preferably, but the disadvantage is that price is high, most preferably offer medicine narrow range, cost of water treatment height etc..In order to preferably remove having in water body
Machine pollutant, researcher turn one's attention in the compound of coagulant, and compound coagulant has inorganic coagulant and organic coagulants
The advantages of, it can effectively improve the removal rate to pollutant in water body.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of compound waddings of PAC-PDMDAAC for handling the Pihe River water coagulation
Solidifying agent, solves PAC in practical applications, there is sludge quantity high compared with organic polymer coagulant administration amount, generating is big,
PDMDAAC coagulation effect more preferably, but the disadvantage is that the problem of price is high, the narrow range, the disadvantages of cost of water treatment is high of most preferably offeing medicine.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of processing the Pihe River water coagulation
PAC-PDMDAAC composite flocculation agent is made of following components by weight percent: 200 parts by weight of ultrapure water, are gathered aluminium polychloride 20~180
50 parts by weight of dimethyl diallyl ammonium chloride.
A kind of PAC-PDMDAAC composite flocculation agent handling the Pihe River water coagulation, is made of: ultrapure water following components by weight percent
200 parts by weight, 100 parts by weight of aluminium polychloride, 50 parts by weight of polydimethyl diallyl ammonium chloride.
Preferably, the PAC-PDMDAAC composite flocculation agent preparation method:
Step 1: it is moved in there-necked flask with graduated cylinder accurate measuring 100m L ultrapure water, there-necked flask is placed in constant temperature magnetic force and is stirred
It mixes on device, a certain amount of PAC stirring is added under moderate-speed mixer state；
Step 2: weighing a certain amount of PDMDAAC, while measuring 100m L ultrapure water and make in the small beaker of 50m L
PDMDAAC is completely dissolved, and washs beaker inner wall；
Step 3: constant temperature blender with magnetic force keeps the state of high-speed stirred, and the PDMDAAC solution of dissolution is slowly moved into three
In mouth bottle, stirs solution under high-speed stirred state, be then allowed to stand, be prepared into the compound of PAC-PDMDAAC 0.8mg/m L
Coagulant is spare；
Step 4: with plastic barrel from old Pi conjunction water 5kg, tap water then is taken according to 1:2 proportional quantities with graduated cylinder, is configured to
The water sample to be processed of low turbidity；
Step 5: weighing PDMDAAC is 2g, and the quality of PAC is 20,60,100,140,180g, prepares net content ratio
For the compound coagulant of 10:1,30:1,50:1,70:1,90:1, coagulation beaker experiments are carried out to the water sample of different initial hazes.
Preferably, the step 1 temperature keep 20 DEG C it is constant.
Preferably, the step 1 constant temperature blender with magnetic force mixing time is set as 5min.
Preferably, the number that the step 2 is completely dissolved PDMDAAC is set as three times.
Preferably, the step 3 seals there-necked flask to prevent solution ingress of air.
Preferably, the step 3 constant temperature blender with magnetic force mixing time is set as 3h.
Preferably, the step 3 time of repose is set as 24 hours.
Preferably, the step 5 dosage is disposed as 6mg/L.
(3) beneficial effect
The present invention provides a kind of PAC-PDMDAAC composite flocculation agents for handling the Pihe River water coagulation, have following beneficial to effect
Fruit:
The present invention, PAC and PDMDAAC coagulant carry out it is compound, be made it is compound than be 10:1,30:1,50:1,70:1,
90:1PAC-PDMDAAC composite flocculation agent is more advantageous to the UV254 removed in water body when compositely proportional is 30:1 or more
And turbidity, as water sample initial haze < 10NTU, with the increase of PAC-PDMDAAC compound coagulant dosage, UV254 and
The removal rate of turbidity has been correspondingly made available raising, and it is 7mg/ that the removal of UV254 and turbidity, which has certain positive correlation to work as dosage,
When L, the removal rate and turbidity removal rate of UV254 reaches most preferably, can achieve 22.45% and 84.64% respectively, in meta-alkalescence and
Under neutral water environment, it is more advantageous to removal of the PAC-PDMDAAC to turbidity, the removal rate of turbidity is 90.06%, but is unfavorable for
UV254 removal, removal rate highest only reach 35%, and when pH value is 6, UV254 removal rate is larger, and removal rate reaches
58.64%.
Detailed description of the invention
Fig. 1 different composite ratio is to turbidity removal effect picture；
Fig. 2 different composite ratio is to UV254 removal effect figure；
Fig. 3 PAC, PAC-PDMDAAC dosage are to turbidity removal effect picture；
Removal effect figure of Fig. 4 difference pH value to UV254 and turbidity.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of technical solution: it is a kind of handle the Pihe River water coagulation PAC-PDMDAAC composite flocculation agent, by with
Lower components by weight percent composition: 200 parts by weight of ultrapure water, aluminium polychloride 20~180,50 weight of polydimethyl diallyl ammonium chloride
Part.
A kind of PAC-PDMDAAC composite flocculation agent handling the Pihe River water coagulation, is made of: ultrapure water following components by weight percent
200 parts by weight, 100 parts by weight of aluminium polychloride, 50 parts by weight of polydimethyl diallyl ammonium chloride.
PAC-PDMDAAC composite flocculation agent preparation method:
Step 1: it is moved in there-necked flask with graduated cylinder accurate measuring 100m L ultrapure water, there-necked flask is placed in constant temperature magnetic force and is stirred
It mixes on device, a certain amount of PAC stirring is added under moderate-speed mixer state；
Step 2: weighing a certain amount of PDMDAAC, while measuring 100m L ultrapure water and make in the small beaker of 50m L
PDMDAAC is completely dissolved, and washs beaker inner wall；
Step 3: constant temperature blender with magnetic force keeps the state of high-speed stirred, and the PDMDAAC solution of dissolution is slowly moved into three
In mouth bottle, stirs solution under high-speed stirred state, be then allowed to stand, be prepared into the compound of PAC-PDMDAAC 0.8mg/m L
Coagulant is spare；
Step 4: with plastic barrel from old Pi conjunction water 5kg, tap water then is taken according to 1:2 proportional quantities with graduated cylinder, is configured to
The water sample to be processed of low turbidity；
Step 5: weighing PDMDAAC is 2g, and the quality of PAC is 20,60,100,140,180g, prepares net content ratio
For the compound coagulant of 10:1,30:1,50:1,70:1,90:1, coagulation beaker experiments are carried out to the water sample of different initial hazes.
20 DEG C of step 1 temperature holding is constant, and step 1 constant temperature blender with magnetic force mixing time is set as 5min.
The number that step 2 is completely dissolved PDMDAAC is set as three times.
Step 3 seals there-necked flask to prevent solution ingress of air, the setting of step 3 constant temperature blender with magnetic force mixing time
For 3h, step 3 time of repose is set as 24 hours.
Step 5 dosage is disposed as 6mg/L.
In use, weighing PDMDAAC is 2g, the quality of PAC is 20,60,100,140,180g, prepares net content ratio
For the compound coagulant of 10:1,30:1,50:1,70:1,90:1, when dosage is 6mg/L, to the water sample of different initial hazes
Coagulation beaker experiments are carried out, obtain relationship such as Fig. 1, Fig. 2 between PAC-PDMDAAC compositely proportional and turbidity, UV254 removal rate
Shown
As shown in Figure 1, when initial haze rises 8NTU by 3.74NTU, compositely proportional is the PAC- of 30:1 or more
PDMDAAC compound coagulant is little to the removal effect difference of turbidity, but turbidity removal effect is apparently higher than answering for compositely proportional 10:1
Flocculant is closed, this illustrates that the increase of PAC ratio can increase finely ground particles participation adsorption bridging in composite flocculation agent and volume sweeps work
Chance is more advantageous to the destruction of colloid aggregation stability along with charge neutrality appropriate acts on, when compositely proportional is 70:1
When, turbidity removal effect reaches most preferably, removal rate 90%, but continues to increase with PAC-PDMDAAC compositely proportional, complex coagulation
The charge neutrality ability of agent declines, and causes the decline of turbidity removal rate.Excessive compound coagulant is added simultaneously also to bring at water
The problem of reason expense increases.And compositely proportional be 10:1 composite flocculation agent in coagulation process, turbidity removal rate only have 50% with
Under, reason is the organic component PDMDAAC positive charge density with higher in compound coagulant, and content is higher, multiple
The charge neutrality ability for closing coagulant is stronger, but under low turbidity, colloidal solid is less, can to have taken off steady colloidal grain surface
It takes more positive charge and reaches stable state again, show as turbidity removal rate decline.
As shown in Figure 2, it is compound than being 30:1,50:1,70:1,90:1 when raw water UV254 is raised to 0.06 by 0.046
PAC-PDMDAAC compound coagulant is little to its removal effect difference, while showing downward trend after first rising, removal rate
Between 10%~40%, and meet than 10:1 complexing agent show continue to decline trend, reason may be to work as raw water
When middle UV254 content is lower, PDMDAAC content is larger, charge neutrality effect play it is strong, so that removal rate is higher, in raw water
The effect of the increase of UV254 content, PDMDAAC charge neutrality has performed to maximum, itself is used as macromolecule organic again, excessive
Organic component fail generate wadding body and through precipitating removal caused by.
Influence of the PAC-PDMDAAC composite flocculation agent dosage to turbidity, UV254 removal:
Experiment uses PAC and compositely proportional as the PAC-PDMDAAC of 70:1, and taking configured initial haze is 5.21NTU,
The water sample that pH is 7.3 adds the complex coagulation of 4mg/L, 5mg/L, 6mg/L, 7mg/L, 8mg/L in 6 1L beakers respectively
Agent obtains dosage as shown in Figure 3 to the removal rate relationship of turbidity and UV254
As shown in Figure 3, with the increase of PAC, PAC-PDMDAAC compound coagulant dosage, two kinds of coagulant for
The removal rate of UV254 and turbidity has been correspondingly made available raising when dosage is 7mg/L, and turbidity removal rate reaches most preferably, respectively
It can achieve 72.87% and 84.64%. composite flocculation agent ratio PAC removal rate and increase by 11.77%, continue growing the throwing of coagulant
The removal rate increase of dose, turbidity is slowly gradually on a declining curve, while the removal rate of UV254 is with two kinds of coagulant charging quantities
Increase and be slowly increased, but varies less, even if dosage is 8mg/L, the removal of UV254 is only 24.56%,
Therefore, 28.32%. the optimal coagulant dose of PAC- PDMDAAC compound coagulant is 7mg/L.PAC-PDMDAAC compound coagulant
It is more higher to turbidity removal rate than PAC the reason is that PDMDAAC molecular weight is larger, PAC can be made to be attached to PDMDAAC long link
On structure, the effect of sweeping is caught-rolled up to charge neutrality, adsorption bridging and the net for enhancing compound coagulant, conducive to the formation of wadding body, works as dosage
When change, the removal rate of turbidity also changes therewith, is because compound coagulant has unit with it to the removal ability of turbidity
Divide PDMDAAC related, the surface PDMDAAC has higher positive charge density, is overlapped mutually with the positive charge on the surface PAC, enhances
When the charge neutrality ability of compound coagulant with dosage progressively increases to optimal coagulant dose, charge neutrality effect is performed to most
Greatly, turbidity removal rate reaches highest, simultaneously, because the sorption-coprecipitation drop of wadding body acts on so that UV254 removal rate also increase after
It is continuous to increase dosage, original negatively charged colloid in water can be made to become positively charged colloid, cause more than glue core just from
Son keeps colloid again stable, to reduce to the removal effect of turbidity under identical dosage, compound coagulant PAC-
Mainly deliquescent naturally the having with unsaturated structure that PDMDAAC .UV254 more preferable to the removal effect of UV254 is represented
The functional group of these substance institute bands of machine object He the total amount of other organic pollutants, cloud density is big, is in water in stronger negative electricity
Property in compound coagulant, have very highly cationic it is poly- it is positive cooperateed with from PDM with Pac, significantly improve compound coagulant
PAC-PDMDAAC and its hydrolysate aluminium hydroxide wadding body can adsorb to UV254 value the adsorption capacity of organic matter, PDMDAAC
Therefore, compound coagulant PAC-PDMDAAC can show to compare the predecessor of contributive macromolecule disinfection by-products (DBPs)
The better UV254 removal effect of PAC
The influence that p H value removes UV254
Early-stage study discovery, the initial p H value of raw water will affect the hydrolysis rate and Forms Transformation of coagulant, thus shadow
It rings to the removal effect to turbidity and UV254.Taking the initial pH prepared is 7.6, and turbidity is the water sample 1L of 8.48NTU in 6
In beaker, adjusting pH value respectively with the sodium hydroxide of 0.1mol/L and hydrochloric acid solution is 6,6.7,7.2,7.5,7.9,8.1, simultaneously
The dosage of 70:1 compound coagulant is optimal coagulant dose 7mg/L, and PAC optimum dosage 8.5mg/L obtains UV254 and turbidity
Removal rate it is as shown in Figure 4.
As shown in Figure 4, as pH value increases, PAC, PAC-PDMDAAC compound coagulant show the removal rate of turbidity
First to increase the trend reduced afterwards, in the range of pH7.0~7.5, residual turbidity is minimum, removal rate respectively reaches 90.06%,
84.97%.PAC, PAC-PDMDAAC compound coagulant are all in downward trend when pH value is 6 for UV254 removal rate,
UV254 removal rate is larger, and removal rate respectively reaches 58.64%, 44.83%, while composite flocculation agent ratio PAC removal rate increases
13.81%, this is because the hydrolysate positive charge density of compound coagulant is higher when pH value is lower, charge neutrality ability compared with
By force, stronger charge neutrality is more advantageous to UV254 removal when pH value further increases, the PAC being attached on PDMDAAC long-chain
The electrically charged reduction of high charge polynuclear complex matter institute in hydrolysate, to the charge neutrality declines of organic matter and colloidal solid
[15], so as to cause the reduction of wadding body, the removal rate for showing as UV254 and turbidity is reduced.
Conclusion
1, the progress of PAC and PDMDAAC coagulant is compound, it is made compound than being 10:1,30:1,50:1,70:1,90:
1PAC-PDMDAAC composite flocculation agent, when compositely proportional is 30:1 or more, the UV254 and turbid that is more advantageous in removal water body
Spend.
2, as water sample initial haze < 10NTU, with the increase of PAC-PDMDAAC compound coagulant dosage, UV254
It is correspondingly made available raising with the removal rate of turbidity, the removal of UV254 and turbidity have certain positive correlation when dosage is
When 7mg/L, the removal rate and turbidity removal rate of UV254 reaches most preferably, can achieve 22.45% and 84.64% respectively,
3, under meta-alkalescence and neutral water environment, removal of the PAC-PDMDAAC to turbidity, the removal rate of turbidity are more advantageous to
Be 90.06%, but be unfavorable for UV254 removal, removal rate highest only reaches 35%, when pH value is 6, UV254 removal rate compared with
Greatly, removal rate reaches 58.64%.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions.By the sentence " element limited including one, it is not excluded that including
There is also other identical elements in the process, method, article or equipment of element ".
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation, it is characterised in that: by following components by weight percent group
At: 200 parts by weight of ultrapure water, aluminium polychloride 20~180,50 parts by weight of polydimethyl diallyl ammonium chloride.
2. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation, it is characterised in that: by following components by weight percent group
At: 200 parts by weight of ultrapure water, 100 parts by weight of aluminium polychloride, 50 parts by weight of polydimethyl diallyl ammonium chloride.
3. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 1, feature exist
In: the PAC-PDMDAAC composite flocculation agent preparation method:
Step 1: it is moved in there-necked flask with graduated cylinder accurate measuring 100mL ultrapure water, there-necked flask is placed in constant temperature blender with magnetic force
On, a certain amount of PAC stirring is added under moderate-speed mixer state；
Step 2: weighing a certain amount of PDMDAAC, while measuring 100mL ultrapure water, in the small beaker of 50mL, makes PDMDAAC
It is completely dissolved, and washs beaker inner wall；
Step 3: constant temperature blender with magnetic force keeps the state of high-speed stirred, and the PDMDAAC solution of dissolution is slowly moved into there-necked flask
It is interior, it stirs solution under high-speed stirred state, is then allowed to stand, be prepared into the compound coagulant of PAC-PDMDAAC 0.8mg/mL
It is spare；
Step 4: with plastic barrel from old Pi conjunction water 5kg, tap water then is taken according to 1:2 proportional quantities with graduated cylinder, is configured to low turbid
The water sample to be processed of degree；
Step 5: weighing PDMDAAC is 2g, and the quality of PAC is 20,60,100,140,180g, and preparing net content ratio is 10:
1, the compound coagulant of 30:1,50:1,70:1,90:1 carries out coagulation beaker experiments to the water sample of different initial hazes.
4. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: described 20 DEG C of the holding of step 1 temperature are constant.
5. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the step 1 constant temperature blender with magnetic force mixing time is set as 5min.
6. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the number that the step 2 is completely dissolved PDMDAAC is set as three times.
7. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the step 3 seals there-necked flask to prevent solution ingress of air.
8. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the step 3 constant temperature blender with magnetic force mixing time is set as 3h.
9. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the step 3 time of repose is set as 24 hours.
10. a kind of PAC-PDMDAAC composite flocculation agent for handling the Pihe River water coagulation according to claim 3, feature exist
In: the step 5 dosage is disposed as 6mg/L.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110316800A (en) * | 2019-06-27 | 2019-10-11 | 河北协同环保科技股份有限公司 | A kind of method of preparation and use of the flocculant for Treatment of Coking Effluent |
| CN110526366A (en) * | 2019-07-27 | 2019-12-03 | 江苏长江水务股份有限公司 | The preparation method of the coagulant of fluoride in a kind of removal water body |
| CN110526368A (en) * | 2019-07-27 | 2019-12-03 | 江苏长江水务股份有限公司 | A kind of efficient preparation method for removing the coagulant of organic matter in water body |
-
2018
- 2018-12-12 CN CN201811516248.8A patent/CN109896604A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110316800A (en) * | 2019-06-27 | 2019-10-11 | 河北协同环保科技股份有限公司 | A kind of method of preparation and use of the flocculant for Treatment of Coking Effluent |
| CN110526366A (en) * | 2019-07-27 | 2019-12-03 | 江苏长江水务股份有限公司 | The preparation method of the coagulant of fluoride in a kind of removal water body |
| CN110526368A (en) * | 2019-07-27 | 2019-12-03 | 江苏长江水务股份有限公司 | A kind of efficient preparation method for removing the coagulant of organic matter in water body |
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Application publication date: 20190618 |