CN107029697A - A kind of method of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate - Google Patents
A kind of method of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate Download PDFInfo
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- CN107029697A CN107029697A CN201710385136.2A CN201710385136A CN107029697A CN 107029697 A CN107029697 A CN 107029697A CN 201710385136 A CN201710385136 A CN 201710385136A CN 107029697 A CN107029697 A CN 107029697A
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 90
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 55
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 27
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 23
- 230000002195 synergetic effect Effects 0.000 title claims abstract description 17
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 230000005855 radiation Effects 0.000 claims abstract description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 3
- 238000005273 aeration Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000000706 filtrate Substances 0.000 claims description 8
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 239000004246 zinc acetate Substances 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000000527 sonication Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 239000000047 product Substances 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 13
- 238000007254 oxidation reaction Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 8
- 239000010865 sewage Substances 0.000 abstract description 4
- 238000002604 ultrasonography Methods 0.000 abstract description 4
- 238000005276 aerator Methods 0.000 abstract description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- 229910052708 sodium Inorganic materials 0.000 description 9
- 239000011734 sodium Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 150000001336 alkenes Chemical class 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000011949 solid catalyst Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000009284 supercritical water oxidation Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/06—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention belongs to sewage treatment area, it is related to the preconditioning technique of mature landfill leachate, the method for particularly relating to a kind of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate, this method is takes pending percolate, and regulation PH is poured into reactor for 10, adds zinc oxide/graphene composite material, stirring is allowed to well mixed, it is ultrasonically treated to react 10min~30min while be aerated, close ultrasonic device and aerator；Open high voltage mercury lamp radiation 1.5h~3.0h；The present invention improves 35% to 40%, NH compared with the method individually handled using ultrasound oxidation technology using the method COD of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment clearance3N clearance improves 45% to 50%；Compared with individually using the method for zinc oxide/graphene Treatment by Photocatalysis Oxidation, using the method for supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment, COD clearance improves 35% to 37%, NH3N clearance improves 40% to 42%.
Description
Technical field
The invention belongs to sewage treatment area, be related to the preconditioning technique of mature landfill leachate, and in particular to be one
The method for planting supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate.
Background technology
The percolate of middle and advanced stage, i.e. mature landfill leachate, it fills the time typically all more than 5 years, this to ooze
The characteristics of filtrate is that organic concentration decreases compared with early stage percolate, but Humus increased, NH3- N concentration
Height, pH value is close to neutrality, and BOD/COD ratios are smaller, biodegradability is poor, and biochemical treatment is difficult to reach preferable effect.
A variety of high-level oxidation technologies such as ultrasound oxidation technology technology collection ozone oxidation, electrochemical oxidation, supercritical water oxidation
Feature is the novel environment friendly water technology that developed recently gets up.Using certain frequency and the ultrasonic wave of intensity
Irradiate sewage, cavitation effect can be produced, extreme physical and chemical condition is provided for organic matter degradation, can finally clean, height
Effect ground removes the organic matter of difficult degradation in sewage, but alone ultrasonic degradation organic matter is present that capacity usage ratio is low, handling rate is low
And it is costly the problems such as.
Zinc oxide is a kind of n-type semiconductor of broad-band gap, with chemical stability is good, safety non-toxic, high activity, energy
Consume low good characteristic and prepare simply, it is cheap.Zinc oxide light induced electron in photocatalytic process is easily multiple with hole
Close, this reduces the photocatalysis efficiency of zinc oxide, the photocatalysis performance of zinc oxide, graphite can be improved by composite modified
Alkene is sp2The planar monolayer carbon material of the bi-dimensional cellular shape crystal structure of hydbridized carbon atoms orderly accumulation formation, it and oxygen
Change zinc compound tense, the specific surface area of one side graphene is larger, can be used as the excellent carrier of zinc oxide；Another aspect graphene
With good electric conductivity and chemical stability, it can receive and transmit electronics, reduce the compound several of light induced electron and hole
Rate, so as to improve the photocatalytic activity of zinc oxide.Generally speaking, zinc oxide/graphene composite material has had the two concurrently
Premium properties, can significantly lift photocatalytic oxidation efficiency.
The content of the invention
The present invention for mature landfill leachate biodegradability in the prior art it is poor the problem of there is provided a kind of energy consumption is low, effect
The high method processing mature landfill leachate of rate improves its biodegradability.
In order to realize foregoing invention purpose, present invention employs following technical scheme：
A kind of method of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate, including with
Lower step：
Pending percolate is taken, regulation PH is that alkalescence is poured into reactor, adds zinc oxide/graphene composite material, stirs
Mix and be allowed to well mixed, ultrasonically treated while being aerated, reaction 10min~30min closes ultrasonic device and aerator；
Open high voltage mercury lamp radiation 1.5h~3.0h.
Preferably, the sonification power is 150W~350W, and aeration quantity is 2.0m3/h~5.0m3/h.
Preferably, the preparation method of the zinc oxide/graphene composite material comprises the following steps：
(1) preparation of graphene oxide dispersion：Add graphene oxide into and suspension is formed in deionized water, ultrasound
Static 1 to 2 day after processing, centrifugal treating removes precipitum and takes supernatant liquor, and graphene oxide dispersion is made；
(2) preparation of zinc oxide/graphene composite material：Graphene oxide dispersion, zinc acetate solution and ethanol are pressed
According to volume ratio 1:1:4 ratios are mixed into mixed liquor, stir and are moved into after adjusting ph value of mixture to neutrality in polytetrafluoroethylene (PTFE)
Reacted in the reactor of lining, room temperature is naturally cooled to after reaction, washing, suction filtration, separation, vacuum drying, roasting are final to obtain
To required zinc oxide/graphene composite material.
Preferably, step (1) sonification power is 200W, and sonication treatment time is 4h.
Preferably, step (2) the zinc acetate solution mass fraction is 30%.
Preferably, step (2) reaction temperature is 180 DEG C, and the reaction time is 12h；The vacuum drying temperature is 70
DEG C, vacuum drying time is 12h；The sintering temperature is 600 DEG C, and roasting time is 1h.
The present invention compared with prior art, has the advantage that：
1st, zinc oxide is loaded to and photochemical catalyst is made on graphene by the present invention, is effectively improved the photocatalysis of zinc oxide
Performance, solves catalyst regeneration and Utilizing question, and this preparation technology and process are simple, and graphene-based photochemical catalyst is being urged
The application in change field has preferable practical significance.
2nd, synergy is there is between ultrasonic oxidation and photochemical catalytic oxidation, is embodied in：1. fragmentation solid catalyst
Grain, increases the total surface area of solid catalyst；2. solid catalyst surface is cleaned, suppresses catalyst inactivation；3. ultrasonic oxidation mistake
The H produced in journey2O2It can promote photocatalytic process with OH.Therefore, supersonic synergic zinc oxide/graphene photocatalysis combination skill
Art is to NH in mature landfill leachate3- N and COD removal effect is handled or single oxygen significantly better than single ultrasonic oxidation
Change zinc/graphene Treatment by Photocatalysis Oxidation, can effectively improve the biodegradability that aged rubbish remains filtrate.
3rd, supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment stage does not produce noxious material, to subsequent bio
The stages such as processing will not have a negative impact.
Brief description of the drawings
Fig. 1 is Experimental equipment of the invention.
Description of reference numerals：Flow straightener 1, water inlet 2, aeration head 3, air blower adapter 4, reactor 5, gas outlet 6, circulation
Cooling water chamber 7, ultrasonic probe 8, high-pressure sodium lamp 9, supersonic generator 10.
Embodiment
The PH of percolate is determined using PHS-3C acidometers；COD is determined using GB11914-89 potassium dichromate methods；
BOD5BODTrakTM biochemical oxygen demand (BOD)s (BOD) analysis-e/or determining produced using Hash company；NH3- N uses nessler reagent light splitting
Photometry is determined.
Percolate used of the invention is derived from certain refuse landfill, in brown color, after aged processing, determines water quality：
NH3- N is that 1684~1810mg/L, PH are that 6.5~7.0, COD is 3540~3760mg/L, BOD5For 520~580mg/L, BOD/
COD ＜ 0.2.
The present invention is described in further details below by drawings and examples, but the scope of protection of present invention is not
It is confined to following examples.
Embodiment 1
As shown in figure 1, Experimental equipment include flow straightener 1, water inlet 2, aeration head 3, air blower adapter 4, reactor 5,
Gas outlet 6, circulating cooling hydroecium 7, ultrasonic probe 8, high-pressure sodium lamp 9, supersonic generator 10；It is circulation outside the wall of reactor 5
Cooling water chamber 7, circulating cooling hydroecium 7 is provided with water inlet 2 and gas outlet 6；Aeration head 3 is located at the bottom of reactor 5, aeration head 3
It is connected by air blower adapter 4 with air blower；Ultrasonic probe 8, high-pressure sodium lamp 9 are located at directly over reactor 5；Ultrasonic wave occurs
Device 10 is connected with ultrasonic probe 8；Flow straightener 1 is connected with high-pressure sodium lamp 9.
Take the pending percolates of 1000mL, regulation PH is 10 and poured into reactor 5, add thereto 3.0g zinc oxide/
Graphene composite material, stirring is allowed to well mixed, and it is that 150W is carried out with ultrasonic probe 8 to set the power of supersonic generator 10
Ultrasonic Radiation, is aerated, aeration quantity is 2.0m while opening air blower by aeration head 33Closed after/h, reaction 30min
Supersonic generator 10 and air blower, open the irradiation of high-pressure sodium lamp 9 3.0h.
The preparation method of the zinc oxide/graphene composite material comprises the following steps：
(1) the preparation of graphene oxide dispersion：Take 100mg graphene oxides to be added in 500mL deionized waters and form outstanding
Supernatant liquid, the then ultrasonically treated 4h under 200W ultrasonic power, by static 1 day of above-mentioned suspension, then carries out centrifugal treating, moved
Go precipitum to take supernatant liquor, obtain graphene oxide dispersion；
(2) the preparation of zinc oxide/graphene composite material：Take 40mL graphene oxide dispersions, 40mL zinc acetate solutions
(mass fraction is 30%) and 160mL ethanol are mixed, magnetic agitation 24h, and the PH for then adjusting solution with ammoniacal liquor is neutral, will be mixed
Close liquid to be moved into the reactor of 250mL polytetrafluoroethyllining linings, 180 DEG C of reaction 12h naturally cool to room temperature, use deionization
Suction filtration is separated after water and ethanol cleaning, and is dried in vacuo 12h at 70 DEG C, then in 600 DEG C of roasting 1h of Muffle furnace back warp, finally
Obtain required zinc oxide/graphene composite material.
Embodiment 2
As shown in figure 1, Experimental equipment include flow straightener 1, water inlet 2, aeration head 3, air blower adapter 4, reactor 5,
Gas outlet 6, circulating cooling hydroecium 7, ultrasonic probe 8, high-pressure sodium lamp 9, supersonic generator 10；It is circulation outside the wall of reactor 5
Cooling water chamber 7, circulating cooling hydroecium 7 is provided with water inlet 2 and gas outlet 6；Aeration head 3 is located at the bottom of reactor 5, aeration head 3
It is connected by air blower adapter 4 with air blower, ultrasonic probe 8, high-pressure sodium lamp 9 are located at directly over reactor 5；Ultrasonic wave occurs
Device 10 is connected with ultrasonic probe 8；Flow straightener 1 is connected with high-pressure sodium lamp 9.
The pending percolates of 1000mL are taken, regulation PH is 9 and poured into reactor 5, and 7.0g zinc oxide/stone is added thereto
Black alkene composite, stirring is allowed to well mixed, and it is that 350W 8 is surpassed with ultrasonic probe to set the power of supersonic generator 10
Acoustic irradiation, is aerated, aeration quantity is 5.0m while opening air blower by aeration head 33Closed after/h, reaction 10min super
Sonic generator 10 and air blower, open the irradiation of high-pressure sodium lamp 9 1.5h.
The preparation method of the zinc oxide/graphene composite material comprises the following steps：
(1) the preparation of graphene oxide dispersion：Take 100mg graphene oxides to be added in 500mL deionized waters and form outstanding
Supernatant liquid, the then ultrasonically treated 4h under 200W ultrasonic power, by static 1 to 2 day of above-mentioned suspension, is then carried out at centrifugation
Reason, removes precipitum and takes supernatant liquor, obtain graphene oxide dispersion；
(2) the preparation of zinc oxide/graphene composite material：Take 40mL graphene oxide dispersions, 40mL zinc acetate solutions
(mass fraction is 30%) and 160mL ethanol are mixed, magnetic agitation 24h, and the PH for then adjusting solution with ammoniacal liquor is neutral, will be mixed
Close liquid to be moved into the reactor of 250mL polytetrafluoroethyllining linings, 180 DEG C of reaction 12h naturally cool to room temperature.Use deionization
Suction filtration is separated after water and ethanol cleaning, and is dried in vacuo 12h at 70 DEG C, then in 600 DEG C of roasting 1h of Muffle furnace back warp, finally
Obtain required zinc oxide/graphene composite material.
Test result indicates that：Compared with the method individually handled using ultrasound oxidation technology, using supersonic synergic zinc oxide/stone
The method COD of black alkene photocatalysis combined pretreatment clearance improves 35% to 40%, NH3- N clearance improves 45%
To 50；% is compared with individually using the method for zinc oxide/graphene Treatment by Photocatalysis Oxidation, using supersonic synergic zinc oxide/stone
The method of black alkene photocatalysis combined pretreatment, COD clearance improves 35% to 37%, NH3- N clearance is improved
40% to 42%, biodegradability (BOD/COD ＞ 0.3) has reached the requirement of subsequent biological treatment.
Claims (6)
1. a kind of method of supersonic synergic zinc oxide/graphene photocatalysis combined pretreatment mature landfill leachate, its feature exists
In comprising the following steps：Pending percolate is taken, regulation PH is that alkalescence is poured into reactor, adds zinc oxide/graphene and is combined
Material, stirring is allowed to well mixed, and ultrasonically treated while being aerated, reaction 10min~30min closes ultrasonic device and exposure
Gas equipment；Open high voltage mercury lamp radiation 1.5h~3.0h.
2. a kind of aged rubbish of supersonic synergic zinc oxide according to claim 1/graphene photocatalysis combined pretreatment oozes
The method of filtrate, it is characterised in that the sonification power is 150W~350W, and aeration quantity is 2.0m3/ h~5.0m3/h。
3. a kind of aged rubbish of supersonic synergic zinc oxide according to claim 1/graphene photocatalysis combined pretreatment oozes
The method of filtrate, it is characterised in that the preparation method of the zinc oxide/graphene composite material comprises the following steps：
(1) preparation of graphene oxide dispersion：Add graphene oxide into and suspension is formed in deionized water, it is ultrasonically treated
Static 1 to 2 day afterwards, centrifugal treating removed precipitum and takes supernatant liquor, and graphene oxide dispersion is made；
(2) preparation of zinc oxide/graphene composite material：By graphene oxide dispersion, zinc acetate solution and ethanol according to body
Product compares 1:1:4 ratios are mixed into mixed liquor, stir and are moved into polytetrafluoroethyllining lining after adjusting ph value of mixture to neutrality
Reacted in reactor, room temperature is naturally cooled to after reaction, washing, suction filtration, separation, vacuum drying, roasting finally give institute
Zinc oxide/the graphene composite material needed.
4. a kind of aged rubbish of supersonic synergic zinc oxide according to claim 3/graphene photocatalysis combined pretreatment oozes
The method of filtrate, it is characterised in that step (1) sonification power is 200W, and sonication treatment time is 4h.
5. a kind of aged rubbish of supersonic synergic zinc oxide according to claim 3/graphene photocatalysis combined pretreatment oozes
The method of filtrate, it is characterised in that step (2) the zinc acetate solution mass fraction is 30%.
6. a kind of aged rubbish of supersonic synergic zinc oxide according to claim 3/graphene photocatalysis combined pretreatment oozes
The method of filtrate, it is characterised in that step (2) reaction temperature is 180 DEG C, and the reaction time is 12h；The vacuum drying temperature
Spend for 70 DEG C, vacuum drying time is 12h；The sintering temperature is 600 DEG C, and roasting time is 1h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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