CN103739056A - Method for degrading organic dye wastewater by utilizing Fe3O4 to activate potassium persulphate - Google Patents

Method for degrading organic dye wastewater by utilizing Fe3O4 to activate potassium persulphate Download PDF

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CN103739056A
CN103739056A CN201310583419.XA CN201310583419A CN103739056A CN 103739056 A CN103739056 A CN 103739056A CN 201310583419 A CN201310583419 A CN 201310583419A CN 103739056 A CN103739056 A CN 103739056A
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organic dye
waste water
dye waste
potassium persulphate
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陆永生
王展
许丹丹
贺红
吴祖龙
张在屋
钱光人
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University of Shanghai for Science and Technology
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Abstract

The invention discloses a method for degrading organic dye wastewater by utilizing Fe3O4 to activate potassium persulphate. The above activation catalyst Fe3O4 is a magnetic nano-catalyst obtained by adding a mixed solution containing a ferrous salt and a ferric salt into a certain concentration of an alkaline solution in a dropwise manner in ultrasonic environment. The nano-Fe3O4 involved in the invention is applied to degrade the organic dye wastewater, and the dye removal rate reaches above 95% when the nano-Fe3O4 and potassium persulphate are added to the organic dye wastewater. The method for degrading organic dye wastewater by utilizing Fe3O4 to activate potassium persulphate has the advantages of high dye removal rate, full utilization of an oxidant, cheap and easily available raw materials involved in a reaction, simple conditions and low energy consumption of the preparation of the catalyst, easy removal of the catalyst residual after the catalytic degradation reaction from the above system, and large application prospect.

Description

Utilize Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water
Technical field
The present invention relates to a kind of method of organic dye waste water, particularly relate to a kind of method that adopts chemical oxidization method to process organic dye waste water, be applied to environmental protection technical field.
Background technology
In recent years, the limited water resources of China is subject to severe contamination, and in ecotope, water balance is subject to serious destruction.And follow the development of DYE PRODUCTION and dyeing, and the quantity discharged of dying industrial wastewater also sharply increases, and China approximately has the waste water from dyestuff discharge of 1.6 billion cubic meters to enter in water surrounding every year according to investigations, accounts for 35% left and right of total waste discharge.Waste water from dyestuff has that colourity is large, organic pollutant content is high, complicated components, change of water quality and bio-toxicity large, and difficult for biological degradation, and towards features such as anti-photodissociation, oxidation resistant future developments, the difficulty of dye wastewater treatment using is further strengthened.
Current have the decolored degradation that multiple physico-chemical process and biological method all can be used for organic dye waste water to process, and the method that is usually used in industrial dye waste water processing both at home and abroad has: biological treatment, chemical flocculation, chemical oxidization method, absorption method etc.And these traditional water treatment method have, efficiency is low, cost is high, easily produce the limitation such as secondary pollution.In recent years, high-level oxidation technology (AOPs) becomes the focus of people's research gradually, and it utilizes the hydroxyl radical free radical that oxidisability is very strong (OH) to carry out the organic pollutant in oxidative degradation water.Chia-Chi Su (Chia-Chi Su, Massakul Pukdee-Asa.Effect of operating parameters on decolorization and COD removal of three reactive dyes by Fenton ' s reagent using fluidized-bed reactor[J] .Desalination, 2011, 278:211-218.), Lucila I.Doumica (Lucila I.Doumica, Patricia M.Mineralization and efficiency in the homogeneous Fenton Orange Goxidation[J] .Applied Catalysis B:Environmental, 2013, 142-143:214-221.), the high-level oxidation technology catalyzed degradation favourable waste water from dyestuff aspect of the invention utilization that public announcement of a patent application number is CN102874915A based on hydroxyl radical free radical obtained certain achievement.But utilize H 2o 2the high-level oxidation technology that produces hydroxyl radical free radical has its weak point, as H 2o 2utilization ratio is not high, H 2o 2be liquid be unfavorable for transportation and price higher; The optimal ph of reaction is between 2～4, so that conventionally need to regulate pH value before reaction; The separation of the iron ion generating after the most conventional Fenton reagent react further makes processing costs more high.For overcoming the deficiency of hydroxyl radical reaction, activating potassium hydrogen persulfate (PMS) with transition metal ion and produce sulfate radical free radical cracking organic dye and become study hotspot in current research, and the price of potassium hydrogen persulfate costliness has limited the application in this field.And the comparatively cheap Potassium Persulphate (PS) of price also can produce sulfate radical free radical under the activation of transition metal ion.At present, utilize ferrous ion activation Potassium Persulphate to produce the efficiency of sulfate radical free radical not high, the catalytic efficiency of ferrous ion is not high enough, and Potassium Persulphate is can not catalytic decomposition complete, cause to the oxidative degradation effect of the pollutent of organic dye waste water be subject to shadow to.
Summary of the invention
In order to solve prior art problem, the object of the invention is to overcome the deficiency that prior art exists, a kind of method of the Fe3O4 of utilization activation Potassium Persulphate degrading organic dye waste water is provided, utilize Fe 3o 4activation Potassium Persulphate can produce sulfate radical free radical quickly and efficiently, oxygenant is fully used, the preparation condition of catalyzer is also comparatively simple and power consumption is lower, after catalyzing oxidizing degrading reaction, remaining catalyzer is easily removed from system, there is larger application prospect, technique is simple, easy to operate, can be within the scope of wider pH (pH2.0～7.0) difficult degradation pollutent in degrading organic dye waste water efficiently.
For reaching foregoing invention, create object, the present invention adopts following technical proposals:
A kind of Fe that utilizes 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, first prepares nanometer Fe 3o 4for catalyzer dispersion liquid, then by nanometer Fe 3o 4catalyzer dispersion liquid joins potassium persulfate solution and forms multiphase coexistence system, then make multiphase coexistence system react with organic dye waste water, the sulfate radical free radical that in multiphase coexistence system, activation produces, by the organic pollutant in oxidative degradation water, is processed organic dye waste water.
In the above-mentioned nanometer Fe of preparation 3o 4during multiphase coexistence system that catalyzer dispersion liquid and above-mentioned potassium persulfate solution form, nanometer Fe 3o 4catalyzer and Potassium Persulphate preferably with the ratio of the mol ratio of 1: 1～5: 1 by being mixed with, the nanometer Fe of employing 3o 4the concentration of catalyzer dispersion liquid is preferably 0.6～1.5mmol/L, the K of employing 2s 2o 8the concentration of solution is preferably 0.6～1.8mmol/L.
Above-mentioned nanometer Fe 3o 4the preparation of catalyzer dispersion liquid preferably includes following steps:
1. adopt divalent iron salt configuration concentration as the ferrous iron solution of 0.5～1.0mol/L, adopt trivalent iron salt configuration concentration as the ferric iron solution of 0.5～1.0mol/L;
2. ferrous iron solution and the ferric iron solution in is 1. thoroughly mixed to form molysite mixing solutions in described step to get respectively 10～20mL, and molysite mixing solutions is heated to 50～70 ℃;
3. under 140W power ultrasonic condition and under the water bath condition of 50～70 ℃, by described step 2. in molysite mixing solutions after heating be dropwise added dropwise in the ammonia soln or sodium hydroxide solution that the concentration of 35～50mL is 2～4mol/L, react and within 20～40 minutes, obtain uniform suspension liquid;
4. the suspension liquid 3. obtaining in described step is cooled to room temperature, utilizes magnetic separating by the Fe generating in suspension liquid 3o 4separate, with deionized water by Fe 3o 4clean to neutral, finally by the Fe obtaining 3o 4be dispersed in the deionized water of 50～100mL and form nanometer Fe 3o 4catalyzer dispersion liquid.
Described step 1. in, described divalent iron salt preferably adopts ferrous sulfate, iron protochloride or Iron nitrate, described trivalent iron salt preferably adopts ferric sulfate, iron(ic) chloride or iron nitrate.
PH of mixed scope control when above-mentioned multiphase coexistence system is reacted with organic dye waste water is between 2.0～7.0.
The present invention is preferably applicable to the pollutant oxidation degradation treatment that concentration is the above-mentioned organic dye waste water of 10～50mg/L.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. the present invention utilizes Fe3O4 activation Potassium Persulphate to produce sulfate radical free radical cracking organic dye waste water, and catalyst Fe 3O4 belongs to Nano grade, and specific surface area is large, and preservation condition requires low, has environmental friendliness property feature;
2. the present invention has simplified technical process, easy to operate, has significantly improved the utilization ratio of Potassium Persulphate, has reduced the cost of water treatment;
3. the preparation condition of catalyzer of the present invention is also comparatively simple and power consumption is lower, and after catalyzing oxidizing degrading reaction, remaining catalyzer is easily removed from system, has larger application prospect.
Embodiment
Details are as follows for the preferred embodiments of the present invention:
Embodiment mono-:
In the present embodiment, utilize Fe3O4 activation Potassium Persulphate to produce sulfate radical free radical cracking organic dye waste water, the preparation method of Fe3O4 catalyzer, the effect of degradating organic dye, described in detail by the present embodiment.
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid as follows:
In 100mL beaker, adding in advance concentration is the FeSO of 1mol/L 47H 2o solution 10mL adds the Fe of 1mol/L under the state of solution stirring 2(SO 4) 3xH 2o solution 10mL, continues stirred solution and fully mixes.Its well-mixed solution is heated to 60 ℃ in water bath condition, and keeps with this understanding, the slower drop rate of then take joins in the ammonia soln that 45mL concentration is 3mol/L.In the process dripping, control ammonia soln under the ultrasonic 60 ℃ of water bath condition of 140W power 25kHz.After dropping finishes, the solution being obtained reacts 30min under this condition.Solution after reaction finishes is cooled to room temperature, the nanometer Fe of utilizing magnetic separating to go out to generate 3o 4, and to pH, be neutral by washed with de-ionized water.The nanometer Fe finally being obtained 3o 4be distributed in the deionized water of 50mL.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4and K 2s 2o 8the reaction of coupling, adds nanometer Fe simultaneously in organic dye waste water 3o 4and K 2s 2o 8, carry out the oxidative degradation of organic dye waste water, adopting 250mL beaker is reactor, processes liking the simulation rhodamine B solution 100mL that concentration is 10mg/L, toward reactor, adds 0.6mmol/L K 2s 2o 8and 1.2mmol/LFe 3o 4, and reactor being placed on magnetic stirring apparatus, pH value is 4.5, adjust pH not, rotating speed is 150rpm, temperature is 25 ℃ of room temperatures.
In the present embodiment, more known referring to the Organic Dyestuff Wastewater Treatment effect under table 1. different technology conditions, the present embodiment utilizes Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, the catalyst Fe of this activation 3o 4in ultrasound environments, be added drop-wise in certain density basic solution and obtain the magnetic nanocatalyst of tool with a kind of divalent iron salt and a kind of trivalent iron salt mixing solutions.The nanometer Fe relating in the present embodiment 3o 4be applied to the degraded of organic dye waste water, by nanometer Fe 3o 4join organic dye waste water with Potassium Persulphate, dyestuff clearance reaches more than 95%.The present embodiment relates to utilizes Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, the clearance of dyestuff is higher, and oxygenant is fully used, and the raw material relating in reaction is cheap and easy to get, and the preparation condition of catalyzer is also comparatively simple and power consumption is lower; After catalytic degradation reaction, remaining catalyzer is easily removed from system, has larger application prospect.
Comparative example one:
In this comparative example, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
The Oxidative Degradation Process of organic dye waste water is as follows:
Adopt and add separately nanometer Fe 3o 4carry out the oxidative degradation of organic dye waste water, process liking the simulation rhodamine B solution 100mL that concentration is 10mg/L, toward reactor, add 1.2mmol/L Fe 3o 4, other condition, with embodiment mono-, is about to reactor and is placed on magnetic stirring apparatus, and pH value is adjusted to 4.5, and rotating speed is 150rpm, and temperature is 25 ℃ of room temperatures.
Comparative example two:
In this comparative example, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
The Oxidative Degradation Process of organic dye waste water is as follows:
Adopt and add separately K 2s 2o 8carry out the oxidative degradation of organic dye waste water, process liking the simulation rhodamine B solution 100mL that concentration is 10mg/L, toward reactor, add 0.6mmol/L K 2s 2o 8, other condition, with embodiment mono-, is about to reactor and is placed on magnetic stirring apparatus, and pH value is adjusted to 4.5, and rotating speed is 150rpm, and temperature is 25 ℃ of room temperatures.Result is in Table 1.
Comparative example three:
In this comparative example, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
The Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe SO 4and K 2s 2o 8the reaction of coupling, adds FeSO simultaneously in organic dye waste water 4and K 2s 2o, utilizes Fe 2+activation K 2s 2o, carries out the oxidative degradation of organic dye waste water, processes liking the simulation rhodamine B solution 100mL that concentration is 10mg/L, in reactor, adds 0.6mmol/L K 2s 2o 8after pH value is adjusted to 4.5, then add 2.4mmol/L FeSO 4, other condition, with embodiment mono-, is about to reactor and is placed on magnetic stirring apparatus, and rotating speed is 150rpm, and temperature is 25 ℃ of room temperatures.Result is in Table 1.
Comparison of test results analyzes one:
Compare respectively Fe in embodiment mono- 3o 4activation K 2s 2o 8, in comparative example one, add separately nanometer Fe 3o 4, in comparative example two, add separately K 2s 2o 8with Fe in comparative example three 2+activation K 2s 2degraded clearance to rhodamine B under the above four kinds of different technology conditions of O.
In embodiment mono-, comparative example one, comparative example two and comparative example three, the simulated wastewater treatment time is 20min, and result is in Table 1.
Organic Dyestuff Wastewater Treatment effect comparison under table 1. different technology conditions
Figure BDA0000418195590000051
in table 1, result shows, independent nanometer Fe in comparative example one 3o 4, in comparative example two independent K 2s 2o 8with Fe in comparative example three 2+/ K 2s 2o 8three kinds of techniques are all failed effective rhodamine B degradation, and in embodiment mono-nanometer Fe 3o 4/ K 2s 2o 8the treatment effect of technique is better.This in embodiment mono-, Fe 3o 4activation K 2s 2o 8, add nanometer Fe simultaneously 3o 4and K 2s 2o 8, treatment of simulated rhodamine B fast and effectively under acidic conditions, after reaction 20min, the clearance of rhodamine B reaches 98.46%, and percent of decolourization can reach 100%.
Embodiment bis-:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4and K 2s 2o 8the reaction of coupling, adds nanometer Fe simultaneously in organic dye waste water 3o 4and K 2s 2o 8, carry out the oxidative degradation of organic dye waste water, adopting 5 identical beakers is reactor, is the simulation rhodamine B solution 100mL of 10mg/L respectively to adding concentration in 5 reactors, as processing object, toward each reactor, adds 0.6mmol/L K 2s 2o 8pH is adjusted to 3,5,7,9 and 11 respectively afterwards, then adds respectively 1.2mmol/L Fe 3o 4.Reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, and temperature is 25 ℃ of room temperatures.Result is in Table 2.
Comparative example four:
In this comparative example, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
The Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe SO 4and H 2o 2the reaction of coupling, adds FeSO simultaneously in organic dye waste water 4and H 2o 2, carry out the oxidative degradation of organic dye waste water, adopting 5 identical beakers is reactor, is the simulation rhodamine B solution 100mL of 10mg/L respectively to adding concentration in 5 reactors, as processing object, toward each reactor, adds 0.6mmol/L H 2o 2pH is adjusted to 3,5,7,9 and 11 respectively afterwards, then adds respectively 1.2mmol/L Fe 3o 4.Reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, and temperature is 25 ℃ of room temperatures.Result is in Table 2.
Comparison of test results analyzes two:
Compare respectively Fe in embodiment bis- 3o 4activation K 2s 2o 8with Fe in comparative example four 2+activation H 2o 2degraded clearance to rhodamine B under above two kinds of different technology conditions and under different pH condition.
In embodiment bis-and comparative example four, the simulated wastewater treatment time is 20min, and result is in Table 2.
Organic Dyestuff Wastewater Treatment effect comparison under table 2. different technology conditions and different pH condition
Figure BDA0000418195590000061
table 2 result shows, under the sour environment condition of pH=3, and nanometer Fe 3o 4to K 2s 2o 8and H 2o 2activation effect is all better.But along with the rising gradually of pH, nanometer Fe 3o 4activation K 2s 2o 8the sulfate radical free radical producing is with respect to nanometer Fe 3o 4activation H 2o 2the reactive behavior that produces hydroxyl radical free radical is higher, when pH=7, larger to the degradation effect gap of rhodamine B, has reached 34.93%.
Embodiment tri-:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4activation K 2s 2o 8produce sulfate radical free radical cracking simulation rhodamine B, the starting point concentration of waste water is 10mg/L, adds 0.6mmol/L K 2s 2o 8after pH is adjusted to 4.5, then add 1.2mmol/L Fe 3o 4, reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, temperature is 25 ℃ of room temperatures.In different reaction times sampling dilutions, survey its absorbancy, result is in Table 3.
Embodiment tetra-:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4activation K 2s 2o 8produce sulfate radical free radical cracking simulation rhodamine B, the starting point concentration of waste water is 20mg/L, and other condition, with embodiment tri-, adds 0.6mmol/L K 2s 2o 8after pH is adjusted to 4.5, then add 1.2mmol/L Fe 3o 4, reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, temperature is 25 ℃ of room temperatures.In different reaction times sampling dilutions, survey its absorbancy, result is in Table 3.
Embodiment five:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4activation K 2s 2o 8produce sulfate radical free radical cracking simulation rhodamine B, the starting point concentration of waste water is 30mg/L, and other condition, with embodiment tri-, adds 0.6mmol/L K 2s 2o 8after pH is adjusted to 4.5, then add 1.2mmol/L Fe 3o 4, reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, temperature is 25 ℃ of room temperatures.In different reaction times sampling dilutions, survey its absorbancy, result is in Table 3.
Embodiment six:
The present embodiment and embodiment mono-are basic identical, and special feature is:
In the present embodiment, preparation nanometer Fe 3o 4for the preparation process of catalyzer dispersion liquid identical with embodiment mono-.
In the present embodiment, the Oxidative Degradation Process of organic dye waste water is as follows:
Adopt nanometer Fe 3o 4activation K 2s 2o 8produce sulfate radical free radical cracking simulation rhodamine B, the starting point concentration of waste water is 50mg/L, and other condition, with embodiment tri-, adds 0.6mmol/L K 2s 2o 8after pH is adjusted to 4.5, then add 1.2mmol/L Fe 3o 4, reactor is placed on the magnetic stirring apparatus that rotating speed is 150rpm, temperature is 25 ℃ of room temperatures.In different reaction times sampling dilutions, survey its absorbancy, result is in Table 3.
Comparison of test results analyzes three:
Comparative example three, embodiment tetra-, embodiment five and embodiment six, by the Fe of preparation 3o 4join in organic dye waste water with Potassium Persulphate, stirring reaction is 20 minutes at ambient temperature; After finishing, reaction removes the residual Fe of dereaction 3o 4catalyzer, sampling dilution; Utilize dyestuff to calculate its clearance in the absorbancy at its charateristic avsorption band place, referring to table 3.
Table 3. adopts the Organic Dyestuff Wastewater Treatment effect comparison of the reaction treatment different concns of nanometer Fe 3O4 and K2S2OS coupling
Figure BDA0000418195590000081
table 3 result shows, nanometer Fe 3o 4/ K 2s 2o 8technique also has good treatment effect to the simulation rhodamine B solution of higher concentration, and in embodiment five, the clearance when the starting point concentration of rhodamine B is 30mg/L has also reached 79.29%, and percent of decolourization is 60%.And this technique has higher catalytic efficiency, in embodiment tri-, when rhodamine B starting point concentration is 10mg/L, after reaction 1min, clearance has just reached 80.12%, and percent of decolourization is 75%.
Above the embodiment of the present invention is illustrated; but the invention is not restricted to above-described embodiment; can also make multiple variation according to the object of innovation and creation of the present invention; the change of making under all spirit according to technical solution of the present invention and principle, modification, substitute, combination, simplify; all should be equivalent substitute mode; as long as goal of the invention according to the invention; only otherwise deviate from the present invention and remove the method for oestrogenic hormon bio-toxicity in water body and know-why and the inventive concept of electron beam irradiation water treatment device, all belong to protection scope of the present invention.

Claims (7)

1. one kind is utilized Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: first prepare nanometer Fe 3o 4for catalyzer dispersion liquid, then by nanometer Fe 3o 4catalyzer dispersion liquid joins potassium persulfate solution and forms multiphase coexistence system, and then multiphase coexistence system is reacted with organic dye waste water, the sulfate radical free radical that in multiphase coexistence system, activation produces, by the organic pollutant in oxidative degradation water, is processed organic dye waste water.
2. utilize according to claim 1 Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: in preparation nanometer Fe 3o 4during multiphase coexistence system that catalyzer dispersion liquid and potassium persulfate solution form, nanometer Fe 3o 4catalyzer and Potassium Persulphate with the ratio of the mol ratio of 1:1 ~ 5:1 by being mixed with, the nanometer Fe of employing 3o 4the concentration of catalyzer dispersion liquid is 0.6 ~ 1.5mmol/L, the K of employing 2s 2o 8the concentration of solution is 0.6 ~ 1.8mmol/L.
3. utilize according to claim 2 Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that nanometer Fe 3o 4the preparation of catalyzer dispersion liquid comprises the steps:
Figure 201310583419X100001DEST_PATH_IMAGE002
adopt divalent iron salt configuration concentration as the ferrous iron solution of 0.5 ~ 1.0mol/L, adopt trivalent iron salt configuration concentration as the ferric iron solution of 0.5 ~ 1.0mol/L;
Figure DEST_PATH_IMAGE004
get respectively 10 ~ 20mL in described step in ferrous iron solution and ferric iron solution be thoroughly mixed to form molysite mixing solutions, molysite mixing solutions is heated to 50 ~ 70 ℃;
Figure DEST_PATH_IMAGE006
under 140W power ultrasonic condition and under the water bath condition of 50 ~ 70 ℃, will be in described step
Figure 263176DEST_PATH_IMAGE004
molysite mixing solutions after middle heating is dropwise added dropwise in the ammonia soln or sodium hydroxide solution that the concentration of 35 ~ 50mL is 2 ~ 4mol/L, reacts and within 20 ~ 40 minutes, obtains uniform suspension liquid;
will be in described step
Figure 42913DEST_PATH_IMAGE006
the suspension liquid obtaining is cooled to room temperature, utilizes magnetic separating by the Fe generating in suspension liquid 3o 4separate, with deionized water by Fe 3o 4clean to neutral, finally by the Fe obtaining 3o 4be dispersed in the deionized water of 50 ~ 100mL and form nanometer Fe 3o 4catalyzer dispersion liquid.
4. utilize according to claim 3 Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: in described step
Figure 438122DEST_PATH_IMAGE002
in, described divalent iron salt is ferrous sulfate, iron protochloride or Iron nitrate, described trivalent iron salt is ferric sulfate, iron(ic) chloride or iron nitrate.
5. according to described in any one in claim 1～4, utilize Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: pH of mixed scope control when multiphase coexistence system is reacted with organic dye waste water is between 2.0 ~ 7.0.
6. according to described in any one in claim 1～4, utilize Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: being applicable to concentration is the pollutant oxidation degradation treatment of the organic dye waste water of 10 ~ 50mg/L.
7. utilize according to claim 5 Fe 3o 4the method of activation Potassium Persulphate degrading organic dye waste water, is characterized in that: being applicable to concentration is the pollutant oxidation degradation treatment of the organic dye waste water of 10 ~ 50mg/L.
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CN106745650A (en) * 2016-12-13 2017-05-31 浙江工业大学 A kind of method of organic dyestuff in utilization ferriferrous oxide nano cage activation sodium peroxydisulfate degradation water
CN108862543A (en) * 2018-09-20 2018-11-23 天津工业大学 A kind of method that poly-dopamine composite non-weaving cloth strengthens iron activation persulfate degradation of dye
CN108862543B (en) * 2018-09-20 2021-06-22 天津工业大学 Method for strengthening iron-activated persulfate degradation dye by using polydopamine composite non-woven fabric
CN109626544A (en) * 2018-12-07 2019-04-16 华南农业大学 A method of based on environmental hormone bisphenol-A in ferriferrous sulfide activation persulfate degradation water body
CN109626544B (en) * 2018-12-07 2020-12-11 华南农业大学 Method for degrading environmental hormone bisphenol A in water body based on ferroferric sulfide activated persulfate
CN111644186A (en) * 2020-06-03 2020-09-11 中山大学 Method for removing ibuprofen by utilizing persulfate activation
CN111807496A (en) * 2020-07-08 2020-10-23 兰州大学 Method for deeply treating oil refining wastewater by using copper slag to activate persulfate
CN111807496B (en) * 2020-07-08 2022-03-25 兰州大学 Method for deeply treating oil refining wastewater by using copper slag to activate persulfate
CN113087289A (en) * 2021-03-25 2021-07-09 珠海市建滔环保技术研发有限公司 Treatment method of circuit board development wastewater
CN114910435A (en) * 2022-05-09 2022-08-16 洛阳莱博图电子科技有限公司 Water quality total nitrogen detection reagent and preparation method thereof

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Application publication date: 20140423