CN105692851A - Method for treating wastewater on basis of magnetic polyacrylamide - Google Patents
Method for treating wastewater on basis of magnetic polyacrylamide Download PDFInfo
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- CN105692851A CN105692851A CN201610250140.3A CN201610250140A CN105692851A CN 105692851 A CN105692851 A CN 105692851A CN 201610250140 A CN201610250140 A CN 201610250140A CN 105692851 A CN105692851 A CN 105692851A
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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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses a method for treating wastewater on the basis of magnetic polyacrylamide. The method has the advantages that modified ferriferous oxide is wrapped in polyacrylamide polymerization procedures so that magnetic flocculants can be obtained; polyacrylamide and suspended matters in water can be flocculated to form alum floc by means of two-step separation treatment, the alum floc formed when sewage is treated is magnetic to a certain extent in separation procedures owing to nano-particles wrapped with the magnetic ferriferous oxide, and flocculate can be quickly separated from the water by the aid of magnetic separation acting force in the separation procedures; integral procedures can be continuously carried out, and accordingly the sewage treatment efficiency can be greatly improved.
Description
Technical field
The present invention relates to a kind of wastewater processing technology, be specifically related to a kind of method of wastewater treatment based on magnetic polyacrylamide, belong to field of Environment Protection。
Background technology
Solid pollutant, Organic substance, antibacterial and virus are three classes of water pollutant, and wherein the pollution of solid pollutant waste water is particularly acute。Aquatile is not only constituted a threat to after entering natural water body by solid waste water, and it would furthermore be possible to be constantly enriched with by precipitation, absorption and food chain, destroy ecological environment, and finally jeopardizes the health of the mankind。But, traditional water treatment technology such as absorption method, activated sludge process etc. be As time goes on, it is shown that respective drawback, as energy consumption is high, treatment effeciency is low, produce secondary pollution etc.。And in recent years, along with the progress of science and technology, what the innovation of water technology was not simple is the development of conventional processes technical elements, the application in water processes of a lot of new materials, more make water technology develop rapidly。Flocculation is extremely complex physics, chemical process, and present majority think that Flocculation Mechanism is cohesion and two kinds of mechanisms of flocculation。Coacervation process is that colloidal solid takes off process that is steady and that form tiny agglomerate；And flocculation process is the process that formed tiny agglomerate generates the flocculate of large volume under the bridge continuous cropping of flocculant。
The strand of polyacrylamide is very long, its amide groups can affine with many materials, absorption formed hydrogen bond, this just enable it to absorption particle between build bridge, make several even dozens of particle link together, generate floc sedimentation, accelerated particle sink。This is similar with general flocculation mechanism, and namely a molecule can adsorb several particle simultaneously, makes them be pulled together, settles rapidly。Based on this, polyacrylamide can use as flocculant。Polyacrylamide flocculant is widely used in sewage disposal with performance and the environmental friendliness of its excellence。But the polyacrylamide of routine is in use, it is all that first flocculation forms alumen ustum, then precipitate and separate, this process length consuming time, and complex process, causes that treatment effeciency is non-normally low；And existing water processes flocculation material and is substantially pollutant based on physical action, which results in its flocculation capacity little, absorption reaches the shortcoming that saturation time is slow, and cannot meet the requirement of commercial Application。
Summary of the invention
It is an object of the invention to provide a kind of method of wastewater treatment based on magnetic polyacrylamide, in the method, polyacrylamide flocculant has Magnetic Isolation, substantially increases sewage treating efficiency。
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of method of wastewater treatment based on magnetic polyacrylamide, comprise the following steps, pending waste water is injected in bulky grain separate tank, first magnetic polyacrylamide is added after waste water is stable, flocculation treatment 15～25 minutes, obtains pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add second batch magnetic polyacrylamide, flocculation treatment 35～55 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment with liquid；
The preparation method of described magnetic polyacrylamide is, by iron sulfate, ethyleneglycol monophenylether, stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then benzophenone, diethyl phosphite are added in ethanol, stir 10 minutes, add ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；Acrylamide is mixed with pyrrolidine, stirs 15 minutes；It is subsequently adding acrylic acid, double; two (2,3-epoxy radicals cyclopenta) ether and 2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding improved ferroferric oxide and sodium hydrate aqueous solution, 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide；Described stabilizer is polyvinyl alcohol or Polyethylene Glycol。
In the present invention, the amount adding first magnetic polyacrylamide is 3.5 g ton；The amount adding second batch magnetic polyacrylamide is 2 g ton；Waste water stabilizes to the conventional sense that those skilled in the art know, and is first stably processing waste water down, is being conducive to the removal of bulky grain pollutant, adds stirring, is conducive to increasing flocculant and the short grained touch opportunity of waste water；The process waste water at twice of the invention, first time removes larger particles, adds stirring when second time processes, it is possible to effectively remove Wastewater Pollutant after filtration；The speed of stirring and the intensity of magnetic separation, it is possible to select according to actual waste water treating capacity。The stabilizer of the present invention can be polyvinyl alcohol 1788, polyvinyl alcohol 1799 or molecular weight is the Polyethylene Glycol of 600～6000；Described silane coupler is KH550, KH560, KH570, KH580, KH590, KH602 or KH792 etc.。
In the present invention, time prepared by magnetic polyacrylamide, described iron sulfate, ethyleneglycol monophenylether, stabilizer mass ratio be 3～6: 25～35: 0.15～0.22, it is preferred to 5: 30: 0.2；Benzophenone, diethyl phosphite, ferroso-ferric oxide, silane coupler mass ratio be 0.08～0.12: 0.1～0.15: 1: 0.01, it is preferred to 0.1: 0.12: 1: 0.01；The present invention utilizes ferrum catalysis to prepare phosphate compound, this compound again can with silane coupler combined effect simultaneously, it is grafted to ferroso-ferric oxide surface, add the dispersibility of ferroso-ferric oxide, improve in particular ferroso-ferric oxide activity in polyacrylamide polymerization, being beneficial to the interface stability of polymer and ferroso-ferric oxide, thus providing the magnetic polyacrylamide that excellent performance is stable, laying a good foundation for wastewater treatment。
In the present invention, acrylamide, pyrrolidine, acrylic acid, double; two (2,3-epoxy radicals cyclopenta) ether, 2-acrylamide-2-methylpro panesulfonic acid, improved ferroferric oxide and sodium hydroxide mass ratio be 100: 0.15～0.22: 55～64: 10～15: 32～38: 1.5: 2.8～3.2, it is preferred to 100: 0.2: 60: 12: 35: 1.5: 3。
In use, polyacrylamide early stage can form alumen ustum with the flocculation of wastewater solids thing to magnetic polyacrylamide disclosed by the invention；When later stage separates, because being enclosed with magnetic ferroferric oxide nano-particles, the alumen ustum formed when causing processing sewage also has certain magnetic, in separation process, utilizes the magnetic separation of externally-applied magnetic field to make flocculate and water be rapidly separated；Whole process can operate in serialization, substantially increases sewage treating efficiency。Present invention firstly discloses a kind of can the method for wastewater treatment of Magnetic Isolation, solve that alumen ustum sedimentation time length in prior art, separation rate be low, the problem of complex process, alumen ustum separation rate, more than 90%, improves sewage treating efficiency；And flocculant preparation method is simple, it is easy to operation, preparation time is short, is suitable for industrialized production, and ferroso-ferric oxide is combined stable with polyacrylamide, is suitable for the purification of dirty water body, and removal efficiency is more than 90%。
Detailed description of the invention
Embodiment one
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 15 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 40 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 94% with liquid, and alumen ustum separation rate is 94%。
Embodiment two
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 25 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 42 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 94% with liquid, and alumen ustum separation rate is 93%。
Embodiment three
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 20 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 55 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 94% with liquid, and alumen ustum separation rate is 90%。
Embodiment four
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 18 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 35 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 94% with liquid, and alumen ustum separation rate is 92%。
Embodiment five
By 30g iron sulfate, 300g ethyleneglycol monophenylether, 15g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.15g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 280g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 20 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 41 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 92% with liquid, and alumen ustum separation rate is 91%。
Embodiment six
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 0.8g benzophenone, 0.1g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 55g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 10g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 25 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 50 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 90% with liquid, and alumen ustum separation rate is 92%。
Embodiment seven
By 60g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1.1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.22g pyrrolidine, stirs 15 minutes；It is subsequently adding 60g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 15g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 20 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 54 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 93% with liquid, and alumen ustum separation rate is 92%。
Embodiment eight
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1.2g benzophenone, 1g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 64g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 15g and 35g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 320g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 15 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 38 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 92% with liquid, and alumen ustum separation rate is 90%。
Embodiment nine
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 0.8g benzophenone, 1.5g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.2g pyrrolidine, stirs 15 minutes；It is subsequently adding 55g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 15g and 32g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 300g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 25 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 36 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 91% with liquid, and alumen ustum separation rate is 91%。
Embodiment ten
By 50g iron sulfate, 300g ethyleneglycol monophenylether, 2g stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then 1g benzophenone, 1.2g diethyl phosphite are added in ethanol, stir 10 minutes, add 10g ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding 0.1g silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；100g acrylamide is mixed with 0.19g pyrrolidine, stirs 15 minutes；It is subsequently adding 64g acrylic acid, double; two (2, the 3-epoxy radicals cyclopenta) ether of 12g and 38g2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding 1.5g improved ferroferric oxide and 310g sodium hydrate aqueous solution (1wt%), 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide。
With mass concentration for 6% montmorillonite aqueous solution for test object, the magnetic field of additional 0.65T when alumen ustum separates, test removal efficiency and alumen ustum separation rate with electrophotometer。Pending for 1Kg waste water is injected in bulky grain separation beaker, add 3.5 milligrams of magnetic polyacrylamides, flocculation treatment 20 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add 2 milligrams of magnetic polyacrylamides, flocculation treatment 50 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment, removal efficiency 90% with liquid, and alumen ustum separation rate is 91%。
Claims (8)
1. the method for wastewater treatment based on magnetic polyacrylamide, it is characterised in that comprise the following steps, pending waste water is injected in bulky grain separate tank, add first magnetic polyacrylamide, flocculation treatment 15～25 minutes after waste water is stable, obtain pretreated waste water；Injecting separate small pond after pretreated waste water being filtered, under stirring, add second batch magnetic polyacrylamide, flocculation treatment 35～55 minutes, magnetic separation is isolated solid particle and is namely completed wastewater treatment with liquid；
The preparation method of described magnetic polyacrylamide is, by iron sulfate, ethyleneglycol monophenylether, stabilizer mix homogeneously, in closed reactor, back flow reaction 12 hours, filtering reacting liquid, obtain ferroso-ferric oxide；Then benzophenone, diethyl phosphite are added in ethanol, stir 10 minutes, add ferroso-ferric oxide, stir 35 minutes under room temperature；It is subsequently adding silane coupler, after stirring 12 hours, namely obtains improved ferroferric oxide；Acrylamide is mixed with pyrrolidine, stirs 15 minutes；It is subsequently adding acrylic acid, double; two (2,3-epoxy radicals cyclopenta) ether and 2-acrylamide-2-methylpro panesulfonic acid, stirs 5 minutes；Being subsequently adding improved ferroferric oxide and sodium hydrate aqueous solution, 80 DEG C are reacted 10 hours, obtain magnetic polyacrylamide solution, and final drying obtains magnetic polyacrylamide；Described stabilizer is polyvinyl alcohol or Polyethylene Glycol。
2. according to claim 1 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterised in that: the amount adding first magnetic polyacrylamide is 3.5 g ton；The amount adding second batch magnetic polyacrylamide is 2 g ton。
3. according to claim 1 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterised in that: described iron sulfate, ethyleneglycol monophenylether, stabilizer mass ratio be 3～6: 25～35: 0.15～0.22。
4. according to claim 3 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterised in that: described iron sulfate, ethyleneglycol monophenylether, stabilizer mass ratio be 5: 30: 0.2。
5. according to claim 1 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterised in that: benzophenone, diethyl phosphite, ferroso-ferric oxide, silane coupler mass ratio be 0.08～0.12: 0.1～0.15: 1: 0.01。
6. according to claim 5 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterised in that: benzophenone, diethyl phosphite, ferroso-ferric oxide, silane coupler mass ratio be 0.1: 0.12: 1: 0.01。
7. according to claim 1 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterized in that: the mass ratio of acrylamide, pyrrolidine, acrylic acid, double; two (2,3-epoxy radicals cyclopenta) ether, 2-acrylamide-2-methylpro panesulfonic acid, improved ferroferric oxide and sodium hydroxide is 100: 0.15～0.22: 55～64: 10～15: 32～38: 1.5: 2.8～3.2。
8. according to claim 7 based on the method for wastewater treatment of magnetic polyacrylamide, it is characterized in that: the mass ratio of acrylamide, pyrrolidine, acrylic acid, double; two (2,3-epoxy radicals cyclopenta) ether, 2-acrylamide-2-methylpro panesulfonic acid, improved ferroferric oxide and sodium hydroxide is 100: 0.2: 60: 12: 35: 1.5: 3。
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