CN110282715A - A kind of preparation and application of polyquaternium In-situ reaction improved PFS - Google Patents
A kind of preparation and application of polyquaternium In-situ reaction improved PFS Download PDFInfo
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- CN110282715A CN110282715A CN201910641791.9A CN201910641791A CN110282715A CN 110282715 A CN110282715 A CN 110282715A CN 201910641791 A CN201910641791 A CN 201910641791A CN 110282715 A CN110282715 A CN 110282715A
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F126/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
- C08F126/02—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a single or double bond to nitrogen
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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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
Abstract
The invention discloses the preparations and application of a kind of polyquaternium In-situ reaction improved PFS, the preparation of the polyquaternium In-situ reaction improved PFS is the synthesis from improved PFS, introducing organic/inorganic nitration mixture is reaction system, sodium chlorate is oxidant, by ferrous sulfate through oxidation, hydrolysis, polyase 13 step reaction, it is prepared for high basicity (18~20%) improved PFS；Directly in improved PFS aqueous solution, by the method for in-situ polymerization, PDMDAAC(molecular weight 4500~20000 is introduced) structural unit.Polyquaternium In-situ reaction improved PFS prepared by the present invention, environmental-friendly, nontoxic, the advantages of having had both both organic/inorganic polymer water inorganic agents., alumen ustum density big, easy to reunite, sedimentation fast, good decolorizing effect, applicability good, dosage few, at low cost, easy to use the features such as fast with flocculation rate.
Description
Technical field
The invention belongs to chemical products and its preparation technical fields, and in particular to a kind of polyquaternium In-situ reaction is modified poly-
Close the preparation of ferric sulfate；With the polyquaternium In-situ reaction improved PFS of preparation, the flocculation applied to dyeing waste water is de-
Color processing.
Background technique
Bodied ferric sulfate (also known as hydroxide iron sulfate), chemical formula: [Fe2(OH)n(SO4)3-n/2] m (n≤2 in formula, m >=
It 10) is, a kind of highly effective inorganic flocculating polymer water purification agent, with extremely strong coagulability, sinking speed is fast, applicable pH
Range is wide, and corrosivity is small, and purifying water effect is good；Dosage is few simultaneously, expense is low, and water quality is excellent, nontoxic after processing, does not generate aluminium dirt
Dye, and have good broken oil, deodorization, decolorization etc. and be referred to as green flocculant, it is now widely used for purificating raw water, oil
[Li Mingyu, Tang Qihong, Zhang Shunli inorganic polymer coagulant bodied ferric sulfate are ground for water separation, industry and sanitary sewage disposal
Study carefully development progress [J] Treatment of Industrial Water, 2000,20 (6), 1-5.].1974, [the Mikami Y, Kake such as Mikami
I.Iron polysulfate solution [P] .JP 49-53195.1974] its synthesis and application have been reported for the first time, the country exists
The development and application for having started bodied ferric sulfate the eighties, compared to traditional flocculant, it has a characteristic that 1. product is nontoxic
Property (be free of harmful heavy metal ions) can be used for drinking water treatment；2. floccule body is formed, speed is fast, and particle is closely knit, than great, alum
Flower sinking speed is fast, and easily separated, the dehydration property of formation is good；3. being needed for the COD in various waste water, biochemistry
Oxygen amount, heavy metal, coloration all have good removal effect, and decoloration, deodorizing performance are good.It also can effectively reduce in water simultaneously
The content of iron, nitrous ammonia；4. the binding force of floccule body and microorganism is strong, there is good removal effect significant planktonic organism etc.；⑤
PH wide adaptation range can use under low temperature；6. raw material is easy to get extensively, product price is cheap, adding less, and use cost is low.It is poly-
Closing sulfuric acid iron product, there are two types of dosage forms: 1. bronzing viscous liquid aqua；2. faint yellow unformed solid powder.Polyaluminum sulfate
Iron Preparation Method mainly has direct oxidation method, catalytic oxidation, one-step synthesis, two-step synthesis method.
Direct oxidation method is aoxidized using ferrous sulfate and various strong oxidizers as raw material, and hydrolysis, polyase 13 step reaction obtain
Target product.According to the difference of the oxidant of selection, it can be divided into following several: 1. nitrate method: with strong oxidizer nitric acid for oxidation
Agent, the NO that simultaneous reactions generate in the process2The effect that may also function as re-oxidation, reaction speed higher with oxidation efficiency
Fastly, the advantages of product is than great, can be easily made pulvis, deficiency is that process route long (setting tail gas attracts) is inconvenient, exists
Problem of environmental pollution.2. potassium chlorate method: compared to nitrate method, with pollution-free, easy to operate, equipment is simple, product stability
The advantages that good, deficiency are cost of material height, and product has containing KCl and chloride ion, and secondary treatment problem is produced in.3. secondary
Chloric acid method: using alkaline oxidiser sodium hypochlorite as oxidant, advantage is that hypochlorite oxidation also oxygen current potential is high, and cost of material is low,
Deficiency is that have the generation of side reaction chlorine, and product stability is poor, cannot grow preservation.4. hydrogen peroxide method: hydrogen peroxide is as oxygen
Agent, active oxygen content is higher, unique by-product be water, advantage at low cost, deficiency be its oxidation activity relatively
Weak, storing has some potential safety problems problem
Catalytic oxidation: this method is the technique that the 70's Japan proposes first.With NaNO2As catalyst, reaction is acid anti-
Condition is answered to carry out, ferrous sulfate obtains product through oxidation, hydrolysis, polymerization.The deficiency of this law has nitrogen oxides (NO) during being
It generates, NaNO2Dosage is big, and product has nitrite ion residual, may not apply to the processing of drinking water, in addition, NaNO2To cause
Carcinous chemicals, further limit this method popularization and application [Xu Yinghui PTS preparation in NaNO2Catalytic action [J]
Work metallurgy, 1998,19 (4), 76-78.].
One-step synthesis: oxidant is dissolved in wiring solution-forming in alkalinity or neutral potassium-containing compound, ferrous sulfate system respectively
At certain density solution, control at a temperature of react oxidizing agent solution addition ferrous sulfate solution to obtain polyaluminum sulfate
Iron, then through washing, neutralize, be dried to obtain powder product (0.2 ~ 0.7mm of partial size) this method and eliminate using sulfuric acid bring equipment
Etching problem, [one-step method prepares solid ferric polysulfate new process [J] for progress, utilization rate of equipment and installations height etc. under normal pressure for reaction
Work environmental protection, 1997,20 (4) .47-49].
Two-step synthesis method: this method combines catalytic oxidation and direct oxidation method, using pickling solution, iron filings as raw material, two
Oxygen manganese is oxidant, NaNO2For co-catalyst, cost of material is greatly reduced, but there are reaction time length, oxidant, acid to use
The deficiencies such as amount is big, and product impurity content is high, basicity is low are [at the exploitation of Lin Qiping bodied ferric sulfate and application [J] industry water
Reason, 1994,14 (2), 35-38.].
Polyquaternary amine macromolecule (PQAS) refer to the homopolymerization of dialkyl diallyl ammonium chloride or with acrylamide, acrylic acid copolymer
Obtained a kind of linear structure water soluble polymer, compared with traditional polyacrylamide water treatment agent, with safe nothing
Poison, outstanding advantages efficiently, inexpensive.Polydimethyl diallyl ammonium chloride (hereinafter abbreviated as PDMDAAC) becomes first
A polymer for being approved for drinking water treatment, PQAS series flocculants are in industrial wastewater, urban domestic wastewater, activity in addition
Many successful applications are all achieved in terms of Treatment of Sludge, especially its adsorption bridging effect having, to colloidal substance, solubility
The removal effect of organic substance is good, and it is strong to be adaptable to Complex water body, compared to inorganic flocculating agent and PAM, to dyeing waste water, life
Sewage living and sludge dewatering treatment effect are good, are same as also showing apparent antibacterial and bactericidal effect.
To sum up, PQAS Organic Cationic Flocculant includes 1. molecular weight height, and flocculating effect is good, the absorption to colloidal substance
Bridge formation ability is strong；The advantages that 2. applied widely, product stability is good, 3. adding less, and the sludge quantity of generation is few.Polyaluminum sulfate
The advantage of iron is (compared with organic polymer) at low cost that Rong Hecheng is environmental-friendly etc..Thus based on modified poly sulfuric acid
Iron introduces PDMDAAC unit in situ, constructs the composite modified bodied ferric sulfate of polyquaternium, organic/inorganic macromolecule can be wadded a quilt with cotton
Solidifying agent advantage organically combines, and proposes that a kind of safe and efficient, inexpensive one kind for being suitable for the processing of dyeing waste water flocculation decoloration is new
Type Organic-inorganic composite multifunctional water treating agent not only has important theoretical value, it may have before good industrial application
Scape.
Summary of the invention
An object of the present invention is the synthesis from improved PFS, introducing organic acid (lactic acid/citric acid)/
Inorganic acid (sulfuric acid/phosphoric acid) composition nitration mixture be reaction system, sodium chlorate is oxidant, by ferrous sulfate through oxidation, hydrolysis, gather
The reaction of 3 steps is closed, high basicity (18~20%) improved PFS is prepared for；Directly in improved PFS aqueous solution,
By the method for in-situ polymerization, PDMDAAC(molecular weight 4500~20000 is introduced) structural unit, propose a kind of poly- title quaternary ammonium salt
In-situ reaction improved PFS and preparation method thereof in the composite modified polyaluminum sulfate iron construction of the type, while having and changing
Property bodied ferric sulfate structural unit and PDMDAAC structural unit, realize organic knot of both organic/inorganic flocculating polymers
It closes.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of preparation method of polyquaternium In-situ reaction improved PFS, comprising the following steps:
Step S101: in the reaction flask equipped with magnetic agitation, being added ferrous sulfate, distilled water, after being completely dissolved, is added dropwise mixed
Acid after being sufficiently stirred, is added three times sodium chlorate, controls reaction temperature at 60~65 DEG C, insulation reaction 1h, and it is red for obtaining appearance
The improved PFS (basicity 18~20%) of brown liquid, viscosity are 60 ~ 80 mPa.s.Raw material ratio: ferrous sulfate: chlorine
Sour sodium: nitration mixture (sulfuric acid/phosphoric acid/lactic acid/citric acid)=17.5:1.5:1.3 ~ 1.5(mass ratio), nitration mixture is sulfuric acid: phosphoric acid: cream
Acid: citric acid (0.8 ~ 1.0) in mass ratio: (0.12 ~ 0.13): (0.1 ~ 0.2): (0.12 ~ 0.22) mixing.
Step S102: under nitrogen protection, in the reaction flask equipped with magnetic agitation, 10mL modified poly sulfuric acid is sequentially added
Ferrous solution, 5mL deionized water, 10mL dimethyl diallyl ammonium chloride aqueous solution (mass ratio 15%), nitration mixture tune system pH=5,
40 DEG C are warming up to, is added dropwise 5mL initiator V-44 aqueous solution (concentration 5%(mass ratio)), finish insulation reaction 1h.50 DEG C are warming up to,
Second of dropwise addition 5mL initiator V-44 aqueous solution (concentration 5%(mass ratio)), finish insulation reaction 2h.Liter temperature is ripe to 70 DEG C
Change 5h, obtains product polyquaternium In-situ reaction improved PFS, wherein polydimethyl diallyl ammonium chloride molecular weight
It is 4500 ~ 25000.
The second object of the present invention is to provide a kind of above-mentioned polyquaternium In-situ reaction improved PFS of application, to print
Contaminate the method for the flocculation decoloration processing of waste water.
In order to solve the above technical problems, present invention provide the technical scheme that
Polyquaternium In-situ reaction improved PFS stoste is taken to use in the form of aqua after mixing in equal volume with water, dispensing
Amount is 1.5ml/200mL, turbidity removal rate 92%, percent of decolourization 91%.This processing method has environmental-friendly, nontoxic, flocculation rate
Fastly, alumen ustum density is big, easy to reunite, and sedimentation is fast, good decolorizing effect, and applicability is good, less developer, at low cost, easy to use (with water
The use of dosage form formula) the features such as.
The beneficial effects of the present invention are:
1. introducing organic/inorganic mixed acid system, using sodium chlorate as oxidant, the modification for having synthesized high basicity (18~20%) is poly-
Ferric sulfate is closed, a new process that is convenient, effectively preparing high basicity bodied ferric sulfate is established, organic acid body is used alone
It is product basicity 16 ~ 17%, the basicity of inorganic acid system product is used alone below 14%；
2. V-44 is initiator, organic/inorganic mixed acid system tune directly using improved PFS aqueous solution as reaction system
Control system pH introduces linear structure polydimethyl diallyl ammonium chloride unit, constructs polyquaternary amine by in-situ polymerization
The composite modified bodied ferric sulfate of salt, realizes being combined into one for both PDMDAAC, bodied ferric sulfates advantage；
3. propose it is a kind of based on polyquaternium In-situ reaction improved PFS dyeing waste water green, efficient flocculating decoloration
Processing method, flocculation rate possessed by bodied ferric sulfate is fast, polydimethyl diallyl ammonium chloride to colloidal substance, can
The advantage that the flocculating effect of soluble organism matter is good is combined into one, at the same be also demonstrated by it is easily prepared, it is at low cost, directly with aqua
The advantages of form uses.
Detailed description of the invention
Fig. 1 is the infrared spectrogram of polyquaternium In-situ reaction improved PFS；
Fig. 2 is the infrared spectrogram of improved PFS；
Fig. 3 is the XRD spectra of polyquaternium In-situ reaction improved PFS；
Fig. 4 is the XRD spectra of improved PFS；
Fig. 5 be polyquaternium In-situ reaction improved PFS, improved PFS water sample flocculation decoloration processing as a result,
Wherein (1) acid scarlet waste water, (2) Kaolin clay suspension, (3) directly yellow waste water；(a) addition polymerization quaternary ammonium salt In-situ reaction is modified poly-
Ferric sulfate processing result is closed, improved PFS processing result (b) is added；
Fig. 6 polyquaternium In-situ reaction improved PFS (polyquaternium molecular weight 12000) electron microscope.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited only to these embodiments.
Embodiment 1: the synthesis of improved PFS
Step S101: equipped with magnetic agitation reaction flask in, be added 17.5g ferrous sulfate, 5ml distilled water after completely dissolution,
Prefabricated nitration mixture (0.12g phosphoric acid, 1.0g sulfuric acid, 0.1g lactic acid, 0.12g citric acid) is added to finish and stir 15min at room temperature.
It is added three times the sodium chlorate for amounting to 1.5g, controls reaction temperature at 60 DEG C, insulation reaction 1h obtains modified poly russet
Ferrum sulfuricum oxydatum solutum.
Product viscosity: 60 mPa.s, basicity 18%；
FT-IR (KBr), ν/cm- 1: 3440,2026,1630,1138,996,619.
Occur in XRD spectrum without obvious single features spike, shows that bodied ferric sulfate is undefined structure, or with polycrystalline
Body form exists.
Further, sulfuric acid is 0.9g, phosphoric acid 0.13, lactic acid 0.1g, citric acid 0.22g in the step S101
Outside, other to be same as above.Product viscosity: 75 mPa.s, basicity 19%.
Further, sulfuric acid is 0.8g, phosphoric acid 0.13g, lactic acid 0.2g in the step S101, and citric acid is
0.22g, it is other to be same as above.Product viscosity: 80 mPa.s, basicity 20%.
Embodiment 2: the synthesis of polyquaternium In-situ reaction improved PFS
Step S201: in the reactor equipped with magnetic agitation, sequentially adding 10mL improved PFS solution, 5mL go from
20min is stirred in sub- water, 10mL DMDAAC aqueous solution (15%, mass ratio), mixed acid tune system pH=5 at room temperature.It is protected in nitrogen
Under shield, 40 DEG C are warming up to, is added dropwise 5mL initiator V-44 aqueous solution (concentration 5%(mass ratio)), finish insulation reaction 1h.It is warming up to
50 DEG C, second of dropwise addition 5mL initiator V-44 aqueous solution (concentration 5%(mass ratio)), finish insulation reaction 2h.Temperature is risen to 70
DEG C, 5h is cured, obtains product polyquaternium In-situ reaction improved PFS, wherein polydimethyl diallyl ammonium chloride
Molecular weight be 12000.
FT-IR (KBr), ν/cm- 1: 3447,3012,2942,2145,1598(strong absworption peaks, the change of quaternary ammonium ion N+
Shape vibration), 1474,1366(-CH2Absorption peak), 1137(C-N stretching vibration).
Compared to the infrared absorption of bodied ferric sulfate, PDMDAAC ,-CH on macromolecular chain2Attract peak that blue shift, C-N occurs
Key attracts peak by SO4 3-Attract peak covering etc. as a result, showing the chemical environment of organic/inorganic paradigmatic structure unit in compound system
Changed, it was demonstrated that the two is non-simple mechanical mixture, but forms a kind of new complex.
The presentation obvious characteristic peak absorption of XRD low angle area is unimodal, shows in composite modified polyaluminum sulfate iron construction, polymerised sulphur
Radical change has occurred in the phase of sour iron, be by amorphous state or polycrystalline inversion of phases is monocrystalline state form.This result shows that, it is former
Position polymerization introduces polyquaternium, shows significant regulating and controlling effect to the pattern of bodied ferric sulfate, on the other hand also further demonstrates that
Organic/inorganic structural unit in complex structure is existed with the combination that mutually merges between the two.
SEM shows that target product is relatively uniform cubic particle, 30 ~ 50nm of scale.Show diformazan diallyl chlorine
Change the abundant effective, reaction of polymerization of the ammonium in improved PFS system uniformly, the distribution of molecule component is relatively uniform.
Further, except DMDAAC aqueous solution (15%, mass ratio) additional amount is that 7mL is cured outside 3h in the step S201,
It is other to be same as above.Molecular weight of product 5000.
Further, except DMDAAC aqueous solution (15%, mass ratio) additional amount is that 12mL cures 7h in the step S201
Outside, other to be same as above.Molecular weight of product 25000.
Application examples 1: the flocculation of Kaolin clay suspension
The kaolin powder of 0.15g is weighed, and is placed it in 250ml single port bottle, 100ml distilled water is added, is stirred in magnetic force
Under the stirring for mixing son, after mixing evenly, upper liquid transmissometer is taken, survey its turbidity.Polyquaternium In-situ reaction modified poly sulphur
Sour molten iron agent (isometric mixture of stoste and water) additional amount 1.5mL stirs 5min at room temperature, and after standing 10min, upper layer is clear
Liquid surveys its turbidity, calculates turbidity removal rate.
The turbidity removal result of 1 polyquaternium In-situ reaction improved PFS of table
Application examples 2: the flocculation decoloration of dyeing waste water
Plant chimney stalk 100ml is added in beaker, under the stirring of magnetic stir bar, after mixing evenly, upper liquid is taken to measure its suction
Luminosity.Polyquaternium In-situ reaction improved PFS aqua (stoste and the isometric mixture of water) additional amount 1.5mL, room temperature
Lower stirring 5min stands 10min, and supernatant liquor is taken to survey absorbance, calculates percent of decolourization.
The decoloration result of 2 polyquaternium In-situ reaction improved PFS of table
Application examples 3: modified poly sulfuric acid, polyquaternium In-situ reaction improved PFS effect compare
In the reaction flask equipped with magnetic agitation, 100mL Kaolin clay suspension (concentration 1.5g/L) is added or 100mL printing and dyeing are useless
Water after stirring 10min, is added polyquaternium In-situ reaction improved PFS aqua (isometric mixture of stoste and water)
It stirs 5min to stand, surveys turbidity removal rate and percent of decolourization respectively, the results are shown in Table 3.
3 modified poly sulfuric acid of table, polyquaternium In-situ reaction improved PFS flocculation decoloration result
Note: improved PFS salinity base 20%；Molecular weight 12000, the basicity 20% of composite modified bodied ferric sulfate.
The foregoing is merely preparation method of the invention, all equivalent changes done according to scope of the present invention patent with repair
Decorations, are all covered by the present invention.
Claims (6)
1. a kind of preparation method of polyquaternium In-situ reaction improved PFS, it is characterised in that: the following steps are included:
Step S101: in the reaction flask equipped with magnetic agitation, being added distilled water and ferrous sulfate, after being completely dissolved, is added dropwise mixed
Acid is added three times sodium chlorate after mixing evenly, controls reaction temperature at 60 ~ 65 DEG C, insulation reaction 1h, and it is reddish brown for obtaining appearance
The improved PFS solution of color liquid, viscosity are 60 ~ 80 mPa.s, basicity 18-20%；
Step S102: under nitrogen protection, in the reaction flask equipped with magnetic agitation, it is molten to sequentially add 10mL improved PFS
Liquid, 5mL deionized water, 10mL concentration are the dimethyl diallyl ammonium chloride aqueous solution of 15wt%, and nitration mixture tune system pH=5 rise
Temperature is added dropwise the initiator V-44 aqueous solution of 5mL concentration 5wt%, finishes insulation reaction 1h, be warming up to 50 DEG C to 40 DEG C, second of drop
The initiator V-44 aqueous solution for adding 5mL concentration 5wt% finishes insulation reaction 2h, rises temperature to 70 DEG C, cures 5h, it is poly- to obtain product
Quaternary ammonium salt In-situ reaction improved PFS.
2. preparation method according to claim 1, which is characterized in that the nitration mixture is sulfuric acid: phosphoric acid: lactic acid: lemon
Acid in mass ratio (0.8 ~ 1.0): (0.12 ~ 0.13): (0.1 ~ 0.2): (0.12 ~ 0.22) mixing.
3. preparation method according to claim 1, which is characterized in that in step S101, feed intake mass ratio: ferrous sulfate:
Sodium chlorate: nitration mixture=17.5:1.5:1.3 ~ 1.5.
4. preparation method according to claim 1, which is characterized in that the basicity of improved PFS is 18-20%.
5. preparation method according to claim 1, which is characterized in that product polyquaternium In-situ reaction modified poly sulfuric acid
In iron, polydimethyl diallyl ammonium chloride molecular weight is 4500 ~ 25000.
6. polyquaternium In-situ reaction improved PFS made from a kind of preparation method as described in claim 1 is answered
With, it is characterised in that: the polyquaternium In-situ reaction improved PFS directly applies to dyeing waste water in the form of aqua
Flocculation decoloration.
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| CN111892133A (en) * | 2020-07-31 | 2020-11-06 | 江苏启创环境科技股份有限公司 | Biochemical tail water deep nitrogen and phosphorus removal method based on magnetic coagulation-adsorption coupling |
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