CN109626543A - A kind of method of two-phase oxidizer system catalytic oxidation treatment organic wastewater - Google Patents

A kind of method of two-phase oxidizer system catalytic oxidation treatment organic wastewater Download PDF

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CN109626543A
CN109626543A CN201811419802.0A CN201811419802A CN109626543A CN 109626543 A CN109626543 A CN 109626543A CN 201811419802 A CN201811419802 A CN 201811419802A CN 109626543 A CN109626543 A CN 109626543A
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catalyst
ozone
concentration
hybrid reaction
reaction system
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CN109626543B (en
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陈朱琦
朱静怡
王启亮
周新全
汪佳
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Huazhong University of Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/725Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/78Treatment of water, waste water, or sewage by oxidation with ozone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds

Abstract

The invention belongs to high-level oxidation technologies to handle waste water technology field, more particularly, to a kind of method of two-phase oxidizer system catalytic oxidation treatment organic wastewater.It is process object with organic wastewater, two-phase oxidizer system is constituted with Oxygen in Liquid agent persulfate solution and gaseous oxidizing agent ozone, the degradation of the efficient activation and pollutant of oxidant is realized by support type quaternary hydrotalcites structure catalyst;Since support type quaternary hydrotalcites structure catalyst is for the good catalytic of the two-phase oxidant, the present invention is allowed to reduce actual waste water treatment process, and reaches very high organic matter removal effect.

Description

A kind of method of two-phase oxidizer system catalytic oxidation treatment organic wastewater
Technical field
The invention belongs to high-level oxidation technologies to handle waste water technology field, more particularly, to a kind of two-phase oxidant body It is the method for catalytic oxidation treatment organic wastewater.
Background technique
High-level oxidation technology (AOPs) has because free radical with high performance can degrade persistence organic pollutant The features such as oxidability is strong, reaction rate is fast, still temperature does not subtract in recent years.But meanwhile it there is also some shortcomings.
During handling complicated organic wastewater, often there is poor processing effect, at high cost etc. in single processing technique Problem.Some high-level oxidation technologies such as Fenton oxidation method is affected by the pH of waste water, and supercritical Water Oxidation Technology is to temperature Also there is higher requirement with pressure.Therefore, the various combination of two or more AOPs is considered as that one kind can effectively degrade dirt Contaminate the method with bright prospects of object.The synergistic effect of multiple tracks technique is generally required in the treatment process of practical organic wastewater It can effectively degradable organic pollutant.
Based on potentiometric titrations (SO4 ·-) AOPs more and more by the concern of domestic and foreign scholars, cross a sulphur Sour hydrogen salt (PMS) and persulfate (PS) are activated frequently as oxidant and generate SO4 ·-.Compared with persulfate, PMS is due to it Structure is asymmetric and is easier to be activated.PMS can pass through heating, ultraviolet light, transition metal, ultrasonic wave, C catalyst and electricity Chemical process activates.Transition metal (Co, Fe, Cu, Mn), especially heterogeneous state, since it is inexpensive and reusable Property, superior performance is shown relative to other methods.
Catalytic ozonation belongs to one kind of high-level oxidation technology, since ozone is at low cost, reaction is fast, oxidability By force, the features such as remaining and without secondary pollution without persistence, application is more and more extensive.Catalytic ozonation is to utilize catalyst The stronger free radical of oxidability, such as hydroxyl radical free radical, to reach purpose of purifying the water quality are converted by ozone molecule.It can The metal oxide for being used to catalysis ozone decomposition is mainly some typical transition metal oxides, such as Fe2O3、MnO2、 Co3O4、CuO、TiO2、Al2O3Deng and support type noble heavy metal oxide, such as Ru, Pd.
Strong oxidizing property in view of ozone and reaction are fast, oxidability is strong, remaining and without secondary pollution etc. special without persistence The advantage of point, catalytic ozonation becomes increasingly conspicuous.Therefore, usually by ozone and hydrogen peroxide, persulfate in industrial application Equal processing techniques combination is to reach further purpose of purifying the water quality.
However, because ozone belongs to gaseous oxidizing agent, property is unstable in aqueous solution, is extremely easy in decomposition, regardless of being double Oxygen aqueous systems or persulfate catalytic oxidation system belong to Oxygen in Liquid agent system.Therefore, as long as being related to and ozone When joint catalysis oxidation, the highest oxidation ability of two-phase oxidant still cannot be effectively played.In practical application, usually will Ozone is as pretreatment or post-processing process, and strict control reaction condition, and which not only adds processing costs also significantly Increase operation workload.Therefore, the oxidation of liquid and gas two-phase can be simultaneously effective catalyzed by how searching out a kind of catalyst Agent system, the technical process for simplifying treatment of Organic Wastewater are extremely urgent.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of two-phase oxidizer systems to be catalyzed oxygen Change the method for processing organic wastewater, its object is to the hydrotalcite structure quaternary catalytics by using carrying transition metal oxide Agent, concerted catalysis activate gaseous oxidizing agent ozone and Oxygen in Liquid agent persulfate, are handled by two-phase oxidizer catalytic system Organic wastewater, since support type quaternary hydrotalcites structure catalyst all has good work for the two-phase oxidizer catalytic system Change effect, allows the present invention using the simple operational process of one-step method, reaches very high organic matter removal effect, thus solve Certainly the prior art is related to technical problem complicated for operation, at high cost when waste water treatment by ozone oxidation.
To achieve the above object, according to one aspect of the present invention, a kind of two-phase oxidizer system catalysis oxidation is provided The method for handling organic wastewater is process object with organic wastewater, with Oxygen in Liquid agent persulfate solution and gaseous oxidizing agent Ozone constitutes two-phase oxidizer system, and the efficient activation and dirt of oxidant are realized by support type quaternary hydrotalcites structure catalyst Contaminate the degradation of object;
The quaternary hydrotalcites structure catalyst includes four kinds of metallic elements, and two of them metallic element is to constitute neatly Rock layers shape basic structure, and surface hydroxyl is provided, promote the absorption to ozone molecule, strengthens the contact of solid-liquid-gas three phase reaction; Other two kinds of metallic elements are active transition metal element, are turned to carry out electronics with the two-phase oxidizer system It moves, generates free radicals, the catalytic oxidation treatment organic wastewater in hybrid reaction system.
Preferably, in the hybrid reaction system Oxygen in Liquid agent persulfate be peroxy-monosulfate or peroxydisulfate, Concentration of the persulfate in the hybrid reaction system is 1~5mmol/L.
Preferably, the concentration of gaseous oxidizing agent ozone is 10~50mg/L in the hybrid reaction system.
Preferably, the support type quaternary hydrotalcites structure catalyst constitutes neatly rock layers using Mg, Al two-spot as skeleton Shape structure;Concentration of the catalyst in the hybrid reaction system is 0.1~0.5g/L.
Preferably, the transition metal element is Cu, Co or Fe.
Preferably, the quaternary hydrotalcites structure catalyst is CuCoMgAl, and four kinds of metallic elements rubs in the catalyst You are (0.75~1.5): (0.05~0.15): 15:5 than Cu:Co:Mg:Al;Or the four-way catalyst is FeCoMgAl, it should The molar ratio Fe:Co:Mg:Al of four kinds of metallic elements is (0.75~1.5): (0.05~0.15): 15:5 in catalyst.
Preferably, the support type quaternary hydrotalcites structure catalyst the preparation method comprises the following steps: with the nitrate of magnesium, aluminium be original Material has the catalyst precursor of hydrotalcite structure using coprecipitation or hydro-thermal method preparation, then uses coprecipitation or hydro-thermal The nitrate of two kinds of transition metal in copper, cobalt and iron is carried in the catalyst precursor by method, finally filters mixture It is dry, in 400~800 DEG C of 5~10h of calcining, obtain the support type quaternary hydrotalcites structure catalyst.
Preferably, the method for the two-phase oxidizer system catalytic oxidation treatment organic wastewater includes the following steps:
(1) use ozone generator, streams of ozone is passed through with the rate Xiang Shuizhong of 5~10g/h, be passed through the time be 3~ 20min obtains the ozone stock solution that concentration is 10~50mg/L;
(2) the ozone stock solution obtained containing the organic wastewater that organic concentration is 100~200ppm with step (1) is pressed Mixed according to 0.2~2:1 of volume ratio, a certain amount of catalyst and persulfate be added, obtains hybrid reaction system, sealing, It is reacted under the conditions of being protected from light, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system is 0.1~0.5g/L, the persulfate Concentration in the hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
Preferably, the method for the two-phase oxidizer system catalytic oxidation treatment organic wastewater includes the following steps:
(1) organic wastewater is mixed in the container that bottom is equipped with gas distributor with the catalyst, it is anti-obtains mixing Answer system;The concentration of the organic waste Organic substance in water is 20~100ppm;
(2) ozone generator is used, the streams of ozone that rate is 2~5g/h is continued by step (1) container bottom It is passed through, is sufficiently reacted with mixed liquor in the container, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system is 0.1~0.5g/L, the persulfate Concentration in the hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show Beneficial effect:
(1) present invention processing organic wastewater is two-phase oxidizer catalytic oxidation system, using carrying transition metal oxide Hydrotalcite structure four-way catalyst, not only have the advantages that hydrotalcite material stability is good, leaching rate is low etc., there are also more table Face hydroxyl, large specific surface area are conducive to stablize the ozone in liquid-phase system by adsorbing in conjunction with ozone, make its oxidation efficiency It improves, with two-phase oxidant electronics transfer can occur for the transition metal of load simultaneously, to improve the catalysis oxidation efficiency.
(2) the catalyst carrying transition metal oxide that the present invention uses, activity is strong, further increases catalytic efficiency.
(3) two-phase oxidizer system is used, there are a variety of free radicals for reaction process, can not only effectively improve organic pollutant Degradation rate, can also be effectively reduced water quality parameter bring influence.
Detailed description of the invention
Fig. 1 is the catalytic mechanism figure of CuCoMgAl catalyst;
Fig. 2 is electron paramagnetic resonance (EPR) energy spectrum diagram that lower reaction solution is added in radical scavenger DMPO;
Fig. 3 is electron paramagnetic resonance (EPR) energy spectrum diagram that lower reaction solution is added in radical scavenger TEMP;
Fig. 4 is the XRD spectra before and after CuCoMgAl catalyst reaction.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below Not constituting a conflict with each other can be combined with each other.
A kind of method of two-phase oxidizer catalytic oxidation processes organic wastewater provided by the invention is processing with organic wastewater Object is constituted two-phase oxidizer system with Oxygen in Liquid agent persulfate solution and gaseous oxidizing agent ozone, passes through support type four First hydrotalcite structure catalyst realizes the degradation of the efficient activation and pollutant of oxidant.The quaternary hydrotalcites structure catalyst Including four kinds of metallic elements, two of them metallic element provides surface hydroxyl to constitute hydrotalcite stratiform basic structure, promotees Into the absorption to ozone molecule, strengthen the contact of solid-liquid-gas three phase reaction;Other two kinds of metallic elements are active transition Metallic element is generated free radicals, is catalyzed in hybrid reaction system to carry out electronics transfer with the two-phase oxidizer system Oxidation processes organic wastewater.
In some preferred embodiments, support type quaternary hydrotalcites structure catalyst of the present invention using Mg, Al two-spot as skeleton, It constitutes stable hydrotalcite layered structure and surface hydroxyl is provided, using two-spot active transition metal as modification, aoxidized with two-phase Agent ozone and persulfate carry out electronics transfer, generate free radicals.
Transition metal element can be two kinds in Cu, Co and Fe.In preferred embodiment, the carrying transition metal oxidation The hydrotalcite-like compound four-way catalyst of object is formed using the two-spot in active transition metal Cu, Co or Fe as modification CuCoMgAl catalyst or FeCoMgAl catalyst with hydrotalcite-like compound.
In some embodiments, the support type quaternary hydrotalcites structure catalyst the preparation method comprises the following steps: with the nitric acid of Mg, Al Salt is raw material, has the catalyst precursor of hydrotalcite structure using coprecipitation or hydro-thermal method preparation, then use coprecipitation Or the nitrate of the transition metal such as copper, cobalt or iron, cobalt is carried in the catalyst precursor by hydro-thermal method, finally by mixture mistake It is filtered dry dry, in 400~800 DEG C of 5~10h of calcining, obtains the support type quaternary hydrotalcites structure catalyst.
Such as specifically: 5-20mmol magnesium nitrate, 2-10mmol aluminum nitrate are dissolved completely in shape in 250ml deionized water At mixed nitrate solution, 15-50mM sodium carbonate is dissolved in 250ml deionized water, sodium carbonate liquor is put into 60-80 DEG C of perseverance It is stirred in warm magnetic stirring apparatus, meanwhile, mixed nitrate solution is instilled in sodium carbonate liquor dropwise in 60min, was titrated Journey remains pH=10 ± 0.02 in sodium carbonate liquor or so (adjusting pH 2M NaOH solution), after dripping off, gained is suspended Liquid stands aging for 24 hours at room temperature, and then, cleaning precipitating repeatedly with deionized water makes pH close to neutrality, and filtered filter residue is put Enter crucible, be put into 80 DEG C of oven drying 12h or more, obtaining solid powder is LDH structure catalyst presoma.Again with same side Transition metal is carried on LDH structure catalyst presoma by method using the nitrate of 0-2mmol transition metal as raw material.It will most The solid obtained afterwards is crushed into powder, and is put into 300-600 DEG C of Muffle furnace calcining 5-8h.
In some embodiments, in hybrid reaction system persulfate be peroxy-monosulfate (PMS) or peroxydisulfate (PS), Concentration of the persulfate in hybrid reaction system is 1~5mmol/L.
In some embodiments, the concentration of ozone is 10~50mg/L in the hybrid reaction system.
In some embodiments, the quaternary hydrotalcites structure catalyst is CuCoMgAl, four kinds of metal members in the catalyst The molar ratio Cu:Co:Mg:Al of element is (0.75~1.5): (0.05~0.15): 15:5;Or the four-way catalyst is FeCoMgAl, the molar ratio Fe:Co:Mg:Al of four kinds of metallic elements is (0.75~1.5): (0.05~0.15) in the catalyst: 15:5。
In some embodiments, the method for processing organic wastewater of the present invention includes the following steps:
(1) use ozone generator, streams of ozone is passed through with the rate Xiang Shuizhong of 5~10g/h, be passed through the time be 3~ 20min obtains the ozone stock solution that concentration is 10~50mg/L;
(2) the ozone stock solution that the pollutant stock solution that organic concentration is 100~200ppm is obtained with step (1) is pressed Mixed according to 0.2~2:1 of volume ratio, a certain amount of catalyst and persulfate be added, obtains hybrid reaction system, sealing, It is reacted under the conditions of being protected from light, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system is 0.1~0.5g/L, the persulfate Concentration in the hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
In some embodiments, the method for processing organic wastewater of the present invention includes the following steps:
(1) organic pollutant stock solution is mixed in the container that bottom is equipped with gas distributor with the catalyst, is obtained To hybrid reaction system;The concentration of organic matter is 20~100ppm in the organic pollutant stock solution;
(2) ozone generator is used, the streams of ozone that rate is 2~5g/h is continued by step (1) container bottom It is passed through, is sufficiently reacted with mixed liquor in the container, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system is 0.1~0.5g/L, the persulfate Concentration in the hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
The present invention contains in the two-phase catalytic oxidation treatment organic wastewater system of ozone and persulfate, and catalyst is by class water Talcum (LDH) structure loads the transition metal oxide with greater activity as skeleton.LDH structure catalyst itself has Stablize, the advantages such as leaching rate is low, while with persulfate electronics transfer can occur for the stronger transition metal of surface-active, generate strong The potentiometric titrations of oxidisability.Ozone is because of its selective oxidizing and unstability, and utilization rate is low in the treatment of waste water, ozone Waste is big.The catalyst surface hydroxyl is conducive to the ozone molecule in adsorbent solution, plays the role of stable ozone, so as to Promote that electronics transfer occurs between transition metal oxide and ozone, generates the hydroxyl radical free radical without selective oxidizing, while EPR It is demonstrated experimentally that also there is singlet oxygen generation in reaction process.Under the synergistic effect of a variety of free radicals, can effectively it enhance to having The degradation capability of machine waste water, while improving the utilization efficiency to ozone.
The following are embodiments:
Embodiment 1
Take ozone stock solution (13.5 ± 0.5mg/L) 12mL prepared in brown sealed glass jars, addition configures 2,4-D stock solution (100ppm) 8mL, be added catalyst 3mg, PMS 2mM, allow the mixed liquor at 25 DEG C constant temperature stir, instead Answer 60min.Different catalysts are as shown in table 1 to the degradation efficiency of 2,4-D.The ozone stock solution uses ozone generator, with The rate Xiang Shuizhong of 8g/h is passed through streams of ozone, and being passed through the time is 8~10min, obtains the ozone that concentration is 13.5 ± 0.5mg/L Stock solution.
Table 1 can be seen that the LDH structure catalyst density of surface hydroxyl of carrying transition metal oxide is high, reaction efficiency It is remarkably reinforced.As can be seen from the table, the LDH catalyst for having loaded Cu, Co oxide obviously increases the removal efficiency of organic matter By force.The LDH structure catalyst being made of MgAl considerably increases the density of surface hydroxyl of catalyst.And loaded transition metal it Although rear catalyst density of surface hydroxyl reduces, have more strongly active transition metal oxide promote catalyst with Electronics transfer between ozone and persulfate, to improve the reaction rate of system.CuCoMgAl catalyst has simultaneously Two kinds of stronger transition metal of activity, and have relatively high density of surface hydroxyl and biggish specific surface area, promote with The contact and reaction of two-phase oxidant, so having reached maximum removal rate.
Degradation efficiency of 1 different catalysts of table to 2,4-D
The catalytic mechanism of CuCoMgAl catalyst is as shown in Figure 1, be made of houghite (LDH) base Mg, Al in embodiment 1 This structure loads transition metal oxide Cu, the Co with greater activity.LDH structure catalyst is due to its density of surface hydroxyl It is larger, be conducive to adsorb ozone, play the role of stable ozone, so as to promote that electronics transfer occurs between Cu, Co and ozone, Generate OH and1O2.With persulfate electronics transfer can occur for Cu, Co simultaneously, generate the SO of strong oxidizing property4 ·-.In a variety of freedom Under the synergistic effect of base, 2,4-D can quickly and effectively be decomposed.
Embodiment 2
Using CuCoMgAl, FeCoMgAl catalyst of different transition metal ratios as heterogeneous catalysis, implemented Experiment described in example 1, reaction time 60min.Degradation efficiency such as table 2 institute of the different transition metal ratio catalyst to 2,4-D Show.
Degradation efficiency of the different transition metal ratio catalyst of table 2 to 2,4-D
Table 2 can be seen that different transition metal ratios have a significant effect to the catalytic efficiency of catalyst, but relative to implementation Ternary and binary catalyst in example 1 all have better catalytic efficiency.Illustrate transition metal in the catalytic activity of catalyst Occupy important function, and four-way catalyst has better catalytic action relative to ternary and binary catalyst.
Embodiment 3
On the basis of embodiment 1, change the concentration of Oxygen in Liquid agent PMS and gaseous oxidizing agent ozone respectively, be added real Apply CuCoMgAl the catalyst 3mg, reaction time 60min in example 1.Degradation efficiency such as table 3 of the various concentration oxidant to 2,4-D It is shown.
Degradation efficiency of the 3 various concentration oxidant of table to 2,4-D
Table 3 can be seen that the concentration of oxidant has a significant effect to the degradation efficiency of 2,4-D, but in PMS concentration in 1.5mM More than, ozone concentration can reach good treatment effect in 11mg/L or more, greatly reduce reaction cost.
Embodiment 4
Taking concentration is 50ppm reaction substrate 20mL in the following glass tube equipped with silica distributor, is added and implements CuCoMgAl catalyst 3mg, PMS 3mM in example 1.Using ozone generator, with the rate of 2g/h by ozone under glass tube Side is continually fed into, and reacts 40min.CuCoMgAl catalyst is as shown in table 4 to different degradation of substrates efficiencies.
4 CuCoMgAl catalyst of table is to different degradation of substrates efficiency
Table 4 is it can be seen that the catalyst system has good degradation effect to different pollutants.
Embodiment 5
On the basis of embodiment 4, carries out electron paramagnetic resonance test experience (EPR), exist to detect in reaction process Free radical.Electron paramagnetic resonance (EPR) is can directly to prove technology existing for free radical, using DMPO radical scavenger Capture OH and SO4 ·-, experimental result as shown in Fig. 2, ◆ andRespectively indicate OH and SO4 ·-, peak intensity 1:2:2:1, For the characteristic peak of OH, the lesser peak of intensity between OH characteristic peak is SO4 ·-Characteristic peak.Using TEMP free radical capture Agent captures1O2, experimental result as shown in figure 3, peak intensity be 1:1:1, be1O2Characteristic peak.Fig. 2 and Fig. 3 can be seen that the reaction There is OH, SO in the process4 ·-1O2A variety of free radicals.
Embodiment 6
XRD test experience is carried out to the CuCoMgAl catalyst of reaction front and back in embodiment 1.XRD spectra is as shown in Figure 4. The diffraction maximum occurred at 2 θ=11 °, 22 °, 34 °, 39 °, 46 °, 60 ° is the characteristic peak of LDH, is occurred at 2 θ=43 ° and 62 ° Diffraction maximum be corresponding oxide may be MgO, CoO, Co3O4And MgCo2O4.Fig. 4 can be seen that reaction front and back CuCoMgAl The XRD spectra of catalyst is substantially similar, illustrates that the catalyst is with good stability.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include Within protection scope of the present invention.

Claims (9)

1. a kind of method of two-phase oxidizer system catalytic oxidation treatment organic wastewater, which is characterized in that with organic wastewater be place Object is managed, two-phase oxidizer system is constituted with Oxygen in Liquid agent persulfate solution and gaseous oxidizing agent ozone, passes through support type Quaternary hydrotalcites structure catalyst realizes the activation of oxidant and the degradation of pollutant;
The quaternary hydrotalcites structure catalyst includes four kinds of metallic elements, and two of them metallic element is to constitute neatly rock layers Shape structure, and surface hydroxyl is provided, promote the absorption to ozone molecule, strengthens the contact of solid-liquid-gas three phase reaction;Other two kinds Metallic element is active transition metal element, to carry out electronics transfer with the two-phase oxidizer system, is produced from By base, the catalytic oxidation treatment organic wastewater in hybrid reaction system.
2. the method as described in claim 1, which is characterized in that Oxygen in Liquid agent persulfate is in the hybrid reaction system Peroxy-monosulfate or peroxydisulfate, concentration of the persulfate in the hybrid reaction system are 1~5mmol/L.
3. the method as described in claim 1, which is characterized in that the concentration of gaseous oxidizing agent ozone in the hybrid reaction system For 10~50mg/L.
4. the method as described in claim 1, which is characterized in that the support type quaternary hydrotalcites structure catalyst is with Mg, Al Two-spot constitutes hydrotalcite layered structure as skeleton;Concentration of the catalyst in the hybrid reaction system be 0.1~ 0.5g/L。
5. the method as described in claim 1, which is characterized in that the transition metal element is Cu, Co or Fe.
6. method as claimed in claim 5, which is characterized in that the quaternary hydrotalcites structure catalyst is CuCoMgAl, should The molar ratio Cu:Co:Mg:Al of four kinds of metallic elements is (0.75~1.5): (0.05~0.15): 15:5 in catalyst;Or it is described Four-way catalyst is FeCoMgAl, and the molar ratio Fe:Co:Mg:Al of four kinds of metallic elements is (0.75~1.5) in the catalyst: (0.05~0.15): 15:5.
7. the method as described in claim 1, which is characterized in that the preparation side of the support type quaternary hydrotalcites structure catalyst Method are as follows: using magnesium, aluminium nitrate as raw material, using coprecipitation or hydro-thermal method preparation have hydrotalcite structure complex catalyst precursor Body, then before the nitrate of two kinds of transition metal in copper, cobalt and iron is carried on the catalyst using coprecipitation or hydro-thermal method It drives in body, mixture filtration drying is finally obtained into the support type quaternary hydrotalcites knot in 400~800 DEG C of 5~10h of calcining Structure catalyst.
8. the method as described in claim 1, which comprises the steps of:
(1) ozone generator is used, streams of ozone is passed through with the rate Xiang Shuizhong of 5~10g/h, being passed through the time is 3~20min, Obtain the ozone stock solution that concentration is 10~50mg/L;
(2) by the ozone stock solution obtained containing the organic wastewater and step (1) that organic concentration is 100~200ppm according to body Product is mixed than 0.2~2:1, and a certain amount of catalyst and persulfate is added, obtains hybrid reaction system, is sealing, is being protected from light Under the conditions of reacted, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system be 0.1~0.5g/L, the persulfate in institute Stating the concentration in hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
9. the method as described in claim 1, which comprises the steps of:
(1) organic wastewater is mixed in the container that bottom is equipped with gas distributor with the catalyst, obtains hybrid reaction body System;The concentration of the organic waste Organic substance in water is 20~100ppm;
(2) ozone generator is used, the streams of ozone that rate is 2~5g/h is continued to be passed through by step (1) described container bottom, It is sufficiently reacted with mixed liquor in the container, the organic matter in the pollutant of degrading;
Wherein, concentration of the catalyst in the hybrid reaction system be 0.1~0.5g/L, the persulfate in institute Stating the concentration in hybrid reaction system is 1~5mmol/L;Reaction time is 0.2~1h.
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CN110627188A (en) * 2019-09-20 2019-12-31 天津科技大学 Method for treating organic pollutants
CN110642361A (en) * 2019-09-20 2020-01-03 天津科技大学 CuMgAl layered oxide and preparation method and application thereof
CN111215091A (en) * 2019-11-18 2020-06-02 华侨大学 Preparation method and application of ferromanganese layered double-metal hydroxide catalyst
CN113716670A (en) * 2021-08-18 2021-11-30 上海应用技术大学 Method for degrading diclofenac in wastewater by catalytic ozone

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