CN101628746B - Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof - Google Patents

Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof Download PDF

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CN101628746B
CN101628746B CN2009100421245A CN200910042124A CN101628746B CN 101628746 B CN101628746 B CN 101628746B CN 2009100421245 A CN2009100421245 A CN 2009100421245A CN 200910042124 A CN200910042124 A CN 200910042124A CN 101628746 B CN101628746 B CN 101628746B
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chloride
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ferric
aluminum
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CN101628746A (en
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李明玉
刘丽娟
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暨南大学
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Abstract

The invention discloses a polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and a preparation method and an application thereof. The method comprises the following steps: heating polyaluminium chloride solution to 40-90 DEG C while stirring the solution, adding polyferric chloride, heating and stirring the solution to perform copolymerization between polyaluminium chloride and polyferric chloride for 0.5-2.0h, obtaining polymeric aluminum ferric chloride solution; adding polydimethyldiallylammonium chloride colloid at room temperature while stirring to obtain a mixed liquor of the two products; stirring at room temperature to ensure that the polydimethyldiallylammonium chloride colloid and polymeric aluminum ferric chloride are completely mutually soluble and obtaining the polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant.

Description

Polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant and preparation method thereof

Technical field

The invention belongs to environmental chemical engineering and environmental protection technical field, relate generally to treatment agent preparation and treatment process that algae and water is polluted, particularly a kind of polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant and its production and application.

Background technology

At present, China's surface water pollution is serious, and along with development of industry and agriculture, nitrogen, the phosphorus of a large amount of organic or inorganics enter lake, reservoir water, cause a large amount of breedings of algae, bring to water preparation process to seriously influence.Current, the research that removes the algae field both at home and abroad is conceived to optimization and reinforcement, biological pre-oxidation and the chemical method for pre-oxidizing etc. of conventional coagulating agent.Biological pre-oxidation is to utilize processing units such as bio-contact oxidation, biological filter, removes algae under biological degradation, absorption and crown_interception, has technology now, increases and build or reconstruct purification structure but need to change water factory, has strengthened running cost; Strong oxidizer is adopted in chemistry preoxidation, can effectively destroy frustule, reduce electrostatic repulsion, improves the algae clearance, but causes leaking of intracellular organic matter easily, causes disinfection byproduct (DBP) and algae toxin problem, and there is potential threat in human body; Enhanced coagulation is not change under the existing processing condition of water factory, to the coagulating agent kind, dosage, operation process such as dosing method are optimized, improve and remove efficient, cost is low, easily realize, but it is limited to improve effect, reason mainly is the outer organism (EOM) of extracellular soluble that the algae in the water can secrete nitrogenous substances and pentose gelatin substance composition, when algae concentration is higher, algae excretory saccharic acid and uronic acid energy and molysite, cooperation of aluminium salt formation or complex compound colloid and be unfavorable for taking off steady, what make coagulation process removes the algae poor effect, and EOM also is proved as the disinfection byproduct (DBP) precursor.Therefore, algae-removing method has become the focus that people pay close attention to safely and efficiently.The solution of this problem directly has influence on the water supply security that contains the micro-polluted source water of algae with lake, the gentle flowing water body of reservoir etc.

(Poly Ferricaluminum Chloride is a kind of ferro-aluminum copoly type inorganic polymer coagulant that is formed through hydrolytic polymerization under certain condition by aluminium salt and molysite PAFC) to aluminium iron polychloride, and its structural formula is: [Al 2(OH) n Cl 6-n] m[Fe 2(OH) nCl 6-n] m.As coagulating agent, the advantage of aluminium iron polychloride is that hydrolysis rate is very fast, and the alumen ustum of formation is more closely knit, and settling velocity is fast, is subjected to the water temperature variable effect little, and is more obvious to the purifying treatment effect of ultra and low temperature and low turbidity water.

Poly Dimethyl Diallyl Ammonium Chloride (PDMDAAC) is a kind of water-soluble organic cation high molecular polymer, its positive charge density height, and good water solubility, relative molecular mass is easy to control, high effect nontoxic.Therefore, be widely used in a plurality of fields such as oil, papermaking, mining, weaving, printing and dyeing, daily-use chemical industry.

As water treatment agent, the advantage of Poly Dimethyl Diallyl Ammonium Chloride is it than inorganic polymer coagulant, and relative molecular mass is high and adjustable, product stability is good, be subjected to environmental influence little, strong to the adsorption bridging ability of water-borne glue body material, flocculating effect is good.But when it used separately, not only reagent cost was higher, and the water treatment poor effect, and during with itself and the compound use of some inorganic coagulant, then may show water treatment effect preferably.

Therefore, make by inorganic and organic polymer water conditioner compound to be used for the fortified water treatment effect, widen this two classes medicament use range, reduce use cost, improve the research work of handling back water quality, caused people's attention.

Summary of the invention

In order to solve above-mentioned the deficiencies in the prior art part, primary and foremost purpose of the present invention is to provide the preparation method of a kind of polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride (PAFC-PDMDAAC) compound coagulant.This method is directly compound at normal temperatures with aluminium iron polychloride (PAFC) and Poly Dimethyl Diallyl Ammonium Chloride (PDMDAAC), preparation property is stable, easy to use, both had high static neutralization and cohesion ability, had the high efficiency organic-inorganic composite coagulant of the flocculation ability of good adsorption bridge formation again.

Another object of the present invention is to provide the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant of method for preparing.

A further object of the present invention is to provide the purposes of above-mentioned polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The new and effective organic and inorganic compound coagulant of the present invention not only can be applicable to removing algae, going turbidly of micro pollution drinking water source, but also can remove other pollutent such as heavy metal, COD etc. in the water; The use of this efficient composite coagulant, based on existing conventional water preparation process " coagulation-precipitation-filtration-sterilization ", not only avoided simultaneously chemical pre-oxidation process to produce the drawback of disinfection byproduct (DBP) and algae toxin, and significantly improved suspended substance (SS) and removal rate of heavy metal, improve water quality, ensured safe drinking water and HUMAN HEALTH.

Purpose of the present invention is achieved through the following technical solutions: a kind of preparation method of polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant comprises following operation steps:

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 40~90 ℃, add poly-ferric chloride solution, continue heated and stirred reaction 0.5~2.0 hour, make between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, obtain the polymerize aluminum chloride ferrous solution;

(2) the polymerize aluminum chloride ferrous solution of whipping step (1) gained at normal temperatures adds Poly Dimethyl Diallyl Ammonium Chloride colloidal solution, obtains aluminium iron polychloride and Poly Dimethyl Diallyl Ammonium Chloride colloidal mixed solution;

(3) whipping step (2) gained mixed solution to Poly Dimethyl Diallyl Ammonium Chloride colloid and aluminium iron polychloride dissolves each other fully at normal temperatures, obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.

The mass percent concentration of aluminium sesquioxide is 5~11% in the described polymeric aluminum chlorides solution of step (1).

The concentration of the described polymerize aluminum chloride ferrous solution of step (1) is with aluminium sesquioxide (Al 2O 3) meter quality percentage composition is 5%~10% and with ferric oxide (Fe 2O 3) meter quality percentage composition is 0.5~5.0%, the basicity of aluminium iron polychloride is 35~90%.

The described Poly Dimethyl Diallyl Ammonium Chloride colloid of step (2) in the solid content mass percent be 30%~70%, the feature k value is 0.8~3.7dL/g.

The content of aluminium iron polychloride is in aluminium sesquioxide and ferric oxide total amount (Al in the described mixed solution of step (2) 2O 3+ Fe 2O 3) with the mass ratio of Poly Dimethyl Diallyl Ammonium Chloride be 25: 1~2: 1.

A kind of polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride according to method for preparing is inorganic-the organic composite type coagulating agent.

Above-mentioned polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant is applied to the coagulation purifying treatment or the sludge dewatering treatment of coagulation purifying treatment, various industrial sewage and the sewage of the former water of micro-polluted drinking water, algae in can well the place to go micro-polluted raw, suspended substance (SS), heavy metal, colourity etc. are removed the COD in waste water or the sewage Cr, BOD 5, multiple pollutent such as SS, heavy metal.The polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant can be diluted the back or directly adds the coagulation purifying treatment that is used for water with any ratio and water, particularly, has better enhanced coagulation removal effect for the algae removal in the former water of micro-polluted drinking water.

The relative prior art of the present invention has following advantage and beneficial effect:

(1) the present invention at first adopts polymerize aluminum chloride and the direct copolymerization of poly-ferric chloride, and the no waste discharging belongs to cleaner production in the preparation process; And the technology advanced person, the management that prepare aluminium iron polychloride are convenient, copolyreaction speed fast (only needing 0.5-2.0h), efficient energy-saving; The aluminium iron polychloride for preparing is pale brown look or brown liquid, gelling do not occur, good water solubility, and stable performance need not to add any stabilization aid.

(2) the present invention adopts polymerize aluminum chloride and poly-ferric chloride generation copolyreaction, obtain inorganic polymer aluminium iron polychloride coagulating agent, this coagulating agent and other commonly used comparing as polymerize aluminum chloride, iron(ic) chloride, poly-ferric chloride, bodied ferric sulfate etc., have better coagulation performance, coagulating is fast, alumen ustum is big, floc settlement is fast, water treatment is effective.

(3) the present invention is compound with Poly Dimethyl Diallyl Ammonium Chloride and aluminium iron polychloride, obtain " polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride " organic and inorganic compound coagulant, its coagulation effect is better than " polyaluminium chloride e-poly-dimethyl-diallyl-ammonium chloride " and compound coagulants such as " polymeric ferric sulfate-poly-dimethyl-diallyl-ammonium chlorides ".

(4) for the inorganic-organic composite type coagulating agent that uses in the former water treatment of micro-polluted drinking water, stipulated wherein aluminium iron polychloride and Poly Dimethyl Diallyl Ammonium Chloride in the high-content of other objectionable impurities, the water quality after guaranteeing to handle meets the water quality standard of national Drinking Water.

(5) the application Poly Dimethyl Diallyl Ammonium Chloride is compound with the aluminium iron polychloride that can adjust ferro-aluminum content, and forming coagulation performance can be with the serial Poly Dimethyl Diallyl Ammonium Chloride-aluminium iron polychloride composite coagulant of water quality and processing requirements adjustment.

(6) this Poly Dimethyl Diallyl Ammonium Chloride-aluminium iron polychloride composite coagulant is in the coagulation purifying treatment of water, relevant with other inorganic-the organic composite type coagulating agent compares, as polyaluminium chloride e-poly-dimethyl-diallyl-ammonium chloride, not only electronegative colloid and suspended particle in the water are had the neutralization of stronger static and take off steady ability, and the particulate matter of taking off after the steady cohesion is had better flocculation sediment effect.

(7) use water-soluble fabulous Poly Dimethyl Diallyl Ammonium Chloride, with inorganic polymer coagulant polymerize aluminum chloride ferrous solution uniform mixing, obtain the organic and inorganic compound coagulant of stable performance under room temperature, its preparation technology is simple, be easy to realize industrialization.

(8) the compound coagulant performance quality is stable, both can be used in the drinking water treatment coagulating sedimentation link and has removed pollution substances such as some suspended particle, algae, need not to change existing drinking water treatment technology, and suspended particle, algae etc. is had good removal effect; Simultaneously, the purifying treatment that also can be used for various industrial sewage.

(9) compound coagulant directly adds with single medicine type, when being used for the former water coagulation purifying treatment of various micro-polluted drinking waters, wastewater treatment and sludge dewatering process, using method is simple, operation is convenient, can obviously reduce the dosage of aluminium iron polychloride, coagulating speed is fast, coagulating sedimentation is fast, improves the water treatment capacity in the unit time greatly and improves the water treatment effect.

Description of drawings

Fig. 1 is that different coagulants is handled back residual turbidity comparison diagram to the former water coagulation of certain water factory, wherein 1# is the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant, and 2# is that polyaluminium chloride e-poly-dimethyl-diallyl-ammonium chloride compound coagulant, 3# are that polymeric ferric sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant, 4# are that aluminum sulfate-poly-dimethyl diene propyl-ammonium chloride composite flocculent, 5# are aluminium iron polychloride.

Fig. 2 is that different coagulants is handled back alga-killing rate comparison diagram to the former water coagulation of certain water factory, wherein 1# is the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant, and 2# is that polyaluminium chloride e-poly-dimethyl-diallyl-ammonium chloride compound coagulant, 3# are that polymeric ferric sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant, 4# are that aluminum sulfate-poly-dimethyl diene propyl-ammonium chloride composite flocculent, 5# are aluminium iron polychloride.

Embodiment

The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited thereto.

Embodiment 1

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 60 ℃, adds poly-ferric chloride solution, continues heated and stirred reaction 1.5 hours, makes between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, and obtains with Al 2O 3The quality percentage composition be 6%, with Fe 2O 3The quality percentage composition be 5% and basicity be 35% polymerize aluminum chloride ferrous solution;

(2) whipping step (1) gained polymerize aluminum chloride ferrous solution at room temperature, add in the solid content mass percent be 30%, the feature k value is the Poly Dimethyl Diallyl Ammonium Chloride colloid of 3.7dL/g, obtains the mixed solution of the two; The content of aluminium iron polychloride is with " Al in the described mixed solution 2O 3+ Fe 2O 3" mass ratio of total amount meter and Poly Dimethyl Diallyl Ammonium Chloride is 25: 1;

(3) at room temperature whipping step (2) gained mixed solution to Poly Dimethyl Diallyl Ammonium Chloride colloid and polymerize aluminum chloride ferrous solution dissolves each other fully, obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The gained compound coagulant is at room temperature placed stable performance for a long time.

Embodiment 2

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 90 ℃, adds poly-ferric chloride solution, continues heated and stirred reaction 0.5 hour, makes between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, and obtains with Al 2O 3The quality percentage composition be 10%, with Fe 2O 3The quality percentage composition be 1% and basicity be 90% polymerize aluminum chloride ferrous solution;

(2) whipping step (1) gained polymerize aluminum chloride ferrous solution at room temperature, add in the solid content mass percent be 50%, the feature k value is the Poly Dimethyl Diallyl Ammonium Chloride colloid of 2.5dL/g, obtains mixed solution; The content of aluminium iron polychloride is 15: 1 in the mass ratio of aluminum oxide and Poly Dimethyl Diallyl Ammonium Chloride in the described mixed solution;

(3) at room temperature whipping step (2) gained mixed solution to Poly Dimethyl Diallyl Ammonium Chloride colloid and polymerize aluminum chloride ferrous solution dissolves each other, and obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The gained compound coagulant is at room temperature placed stable performance for a long time.

Embodiment 3

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 40 ℃, adds poly-ferric chloride solution, continues heated and stirred reaction 2 hours, makes between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, and obtains with Al 2O 3The quality percentage composition be 8%, with Fe 2O 3The quality percentage composition be 3% and basicity be 70% polymerize aluminum chloride ferrous solution;

(2) whipping step (1) gained polymerize aluminum chloride ferrous solution at room temperature, add in the solid content mass percent be 60%, the feature k value is the Poly Dimethyl Diallyl Ammonium Chloride colloid of 3.0dL/g, obtains mixed solution; The content of aluminium iron polychloride is with Al in the described mixed solution 2O 3+ Fe 2O 3The mass ratio of total amount meter and Poly Dimethyl Diallyl Ammonium Chloride is 10: 1;

(3) at room temperature whipping step (2) gained mixed solution to Poly Dimethyl Diallyl Ammonium Chloride colloid and polymerize aluminum chloride ferrous solution dissolves each other, and obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The gained compound coagulant is at room temperature placed stable performance for a long time.

Embodiment 4

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 80 ℃, adds poly-ferric chloride solution, continues heated and stirred reaction 1.0 hours, makes between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, and obtains with Al 2O 3The quality percentage composition be 6%, with Fe 2O 3The quality percentage composition be 2% and basicity be 60% polymerize aluminum chloride ferrous solution;

(2) whipping step (1) gained polymerize aluminum chloride ferrous solution at room temperature, add in the solid content mass percent be 70%, the feature k value is the Poly Dimethyl Diallyl Ammonium Chloride colloid of 1.8dL/g, obtains the mixed solution of the two; The content of aluminium iron polychloride is with Al in the described mixed solution 2O 3+ Fe 2O 3Total is 6: 1 with the mass ratio of Poly Dimethyl Diallyl Ammonium Chloride;

(3) at room temperature whipping step (2) gained coagulation closes liquid to Poly Dimethyl Diallyl Ammonium Chloride colloid and polymerize aluminum chloride ferrous solution and dissolves each other, and obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The gained compound coagulant is at room temperature placed stable performance for a long time.

Embodiment 5

(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 70 ℃, adds poly-ferric chloride solution, continues heated and stirred reaction 1.5 hours, makes between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, and obtains with Al 2O 3The quality percentage composition be 9%, with Fe 2O 3The quality percentage composition be 1.5% and basicity be 80% polymerize aluminum chloride ferrous solution;

(2) whipping step (1) gained polymerize aluminum chloride ferrous solution at room temperature, add in the solid content mass percent be 40%, the feature k value is the Poly Dimethyl Diallyl Ammonium Chloride colloid of 0.8dL/g, obtains the mixed solution of the two; The content of aluminium iron polychloride is with Al in the described mixed solution 2O 3+ Fe 2O 3The mass ratio of total amount meter and Poly Dimethyl Diallyl Ammonium Chloride is 2: 1;

(3) at room temperature whipping step (2) gained mixed solution dissolves each other between Poly Dimethyl Diallyl Ammonium Chloride colloid and polymerize aluminum chloride ferrous solution, obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.The at room temperature long-time stable performance of gained compound coagulant.

Embodiment 6

Embodiment 1 gained compound coagulant is carried out the coagulation purifying treatment to the former water of micro-polluted drinking water, and (dosage is with Al 2O 3+ Fe 2O 3The total amount meter).In water factory's existing " coagulation-precipitation-filtration-sterilization " traditional technology, in " coagulation " unit, add concrete water treatment condition such as table 1 and table 2.Behind the coagulating sedimentation, the surplus turbid and algae removal rate of supernatant liquor is surveyed in sampling.Polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant (1#) removes turbid effect such as table 1 and shown in Figure 1 with the water treatment of polyaluminium chloride e-poly-dimethyl-diallyl-ammonium chloride compound coagulant (2#), polymeric ferric sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant (3#), aluminum sulfate-poly-dimethyl diene propyl-ammonium chloride composite flocculent (4#), aluminium iron polychloride (5#), removes algae effect and table 2 and shown in Figure 2.

Five kinds of different coagulants of table 1 are handled relatively (residual turbidity unit: NTU) of back residual turbidity to the former water coagulation of certain water factory

Certain water factory's coagulating treatment condition: raw water turbidity 35.5NTU, algae content 2,500 ten thousand, the dosage of coagulating agent is according to Al 2O 3+ Fe 2O 3The total amount meter.

As shown in Table 1, when 1# compound coagulant dosage is 2.0mg/L, surplus turbid be 1.9NTU, reached water factory's settling tank water outlet requirement; And after the processing of the aluminium iron polychloride coagulating agent of same amount, the water body residual turbidity is 5.1NTU, does not reach water quality standard.Simultaneously, from the trend map of Fig. 1 as can be seen, the 1# polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride go turbid effect all superior than other compound coagulant effect.

Five kinds of different coagulants of table 2 are handled relatively (alga-killing rate: %) of back alga-killing rate to the former water coagulation of certain water factory

Water factory's coagulating treatment condition: raw water turbidity 35.5NTU, algae content 2,500 ten thousand, the dosage of coagulating agent is according to Al 2O 3+ Fe 2O 3The total amount meter.

As seen from Table 2, when coagulant charging quantity is that 2.0mg/L is surplus turbid when up to standard, to the removal effect of algae can be when adding the 5# aluminium iron polychloride 80.99%, rise to and add 95.95% of 1# compound coagulant.The 1# compound coagulant obviously is better than conventional aluminium iron polychloride coagulating agent to the removal effect of algae; In addition, the test-results of table 2 shows, 1# polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant remove the effect that the algae effect all is better than other compound coagulant.

The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (3)

1. the preparation method of a polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant is characterized in that comprising following operation steps:
(1) polymeric aluminum chlorides solution being heated to temperature under stirring condition is 40~90 ℃, add poly-ferric chloride solution, continue heated and stirred reaction 0.5~2.0 hour, make between polymerize aluminum chloride and the poly-ferric chloride copolyreaction takes place, obtain the polymerize aluminum chloride ferrous solution; The concentration of described polymerize aluminum chloride ferrous solution is to be 5%~10% and to be 0.5~5.0% in ferric oxide quality percentage composition that in aluminum oxide quality percentage composition the basicity of aluminium iron polychloride is 35~90%;
(2) the polymerize aluminum chloride ferrous solution of whipping step (1) gained at normal temperatures adds Poly Dimethyl Diallyl Ammonium Chloride colloidal solution, obtains aluminium iron polychloride and Poly Dimethyl Diallyl Ammonium Chloride colloidal mixed solution; Described Poly Dimethyl Diallyl Ammonium Chloride colloid in the solid content mass percent be 30%~70%, the feature k value is 0.8~3.7dL/g; The content of aluminium iron polychloride is 20: 1~2: 1 in the mass ratio of aluminium sesquioxide and ferric oxide total amount and Poly Dimethyl Diallyl Ammonium Chloride in the described mixed solution;
(3) whipping step (2) gained mixed solution to Poly Dimethyl Diallyl Ammonium Chloride colloid and aluminium iron polychloride dissolves each other fully at normal temperatures, obtains the polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant.
2. polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant according to the preparation of the described method of claim 1.
3. polymeric aluminum ferric chloride-polydimethyldiallylachloride chloride compound coagulant according to claim 2 is applied to the coagulation purifying treatment or the sludge dewatering treatment of coagulation purifying treatment, various industrial sewage and the sewage of the former water of micro-polluted drinking water.
CN2009100421245A 2009-08-26 2009-08-26 Polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and preparation method thereof CN101628746B (en)

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张克峰等."聚合氯化铝铁强化混凝去除藻类的试验研究".《水资源与水工程学报》.2008,第19卷(第2期),16-18.

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