CN106517572A - High-grade oxidation method for removing artificial sweetening agent in sewage based on sulfate radical - Google Patents
High-grade oxidation method for removing artificial sweetening agent in sewage based on sulfate radical Download PDFInfo
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- CN106517572A CN106517572A CN201610903538.2A CN201610903538A CN106517572A CN 106517572 A CN106517572 A CN 106517572A CN 201610903538 A CN201610903538 A CN 201610903538A CN 106517572 A CN106517572 A CN 106517572A
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- sewage
- sweetening agent
- artificial sweetening
- oxidization method
- advanced oxidization
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- 239000010865 sewage Substances 0.000 title claims abstract description 49
- 239000008122 artificial sweetener Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 18
- 230000003647 oxidation Effects 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000006228 supernatant Substances 0.000 claims abstract description 15
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 10
- OSVXSBDYLRYLIG-UHFFFAOYSA-N chlorine dioxide Inorganic materials O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 14
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052753 mercury Inorganic materials 0.000 claims description 13
- 238000013019 agitation Methods 0.000 claims description 12
- 230000000249 desinfective effect Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 230000001954 sterilising effect Effects 0.000 claims description 8
- 239000002244 precipitate Substances 0.000 claims description 7
- 229920005479 Lucite® Polymers 0.000 claims description 6
- 235000003599 food sweetener Nutrition 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000003765 sweetening agent Substances 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000003918 potentiometric titration Methods 0.000 claims description 3
- 239000003708 ampul Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract 3
- 238000004062 sedimentation Methods 0.000 abstract 2
- 235000019398 chlorine dioxide Nutrition 0.000 abstract 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 abstract 1
- 230000008021 deposition Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 16
- 239000000356 contaminant Substances 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 239000007800 oxidant agent Substances 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 238000009303 advanced oxidation process reaction Methods 0.000 description 4
- 238000002552 multiple reaction monitoring Methods 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 238000005202 decontamination Methods 0.000 description 3
- 230000003588 decontaminative effect Effects 0.000 description 3
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 3
- 235000019605 sweet taste sensations Nutrition 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- WBZFUFAFFUEMEI-UHFFFAOYSA-M Acesulfame k Chemical compound [K+].CC1=CC(=O)[N-]S(=O)(=O)O1 WBZFUFAFFUEMEI-UHFFFAOYSA-M 0.000 description 1
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- 241000252212 Danio rerio Species 0.000 description 1
- 241001494246 Daphnia magna Species 0.000 description 1
- 241001275898 Mylopharyngodon piceus Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241000209501 Spirodela Species 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 229960004998 acesulfame potassium Drugs 0.000 description 1
- 235000010358 acesulfame potassium Nutrition 0.000 description 1
- 239000000619 acesulfame-K Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229940043376 ammonium acetate Drugs 0.000 description 1
- 235000019257 ammonium acetate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000584 environmental toxicity Toxicity 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000004704 ultra performance liquid chromatography Methods 0.000 description 1
- 238000001946 ultra-performance liquid chromatography-mass spectrometry Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
-
- 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
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a high-grade oxidation method for removing an artificial sweetening agent in sewage based on sulfate radical. The method comprises the following steps: 1) performing gravity flowing on the sewage to a secondary sedimentation tank, performing deposition and separating through the secondary sedimentation tank; 2) adjusting the pH value of a supernatant to 3-11, adding 0.1 mol/L NaS2O3 solution, introducing the materials in a photoreactor for a light reaction; and 3) processing an effluent and analyzing the result, sending the material to a contact disinfection pool, reacting the material and ClO2 for disinfection, and discharging the effluent to a municipal sewage pipe network. The method has the advantages of simple equipment, simple operation, low cost, no pollution, and high stability; and can effectively remove the Ass in the sewage; sewage discharge can reach the requirement, environment pollution can be avoided, processing effect is more economic, the insufficiency of a sewage purifying technology in the prior art can be compensated, and the disadvantages of poor Ass effect and poor operation in the prior art can be improved, and the blank of an artificial sweetening agent removal technology in relative water source at home and abroad is made up.
Description
Technical field
The present invention relates to dirty water decontamination handles technical field, it is specifically related to a kind of go decontamination based on potentiometric titrations
The advanced oxidization method of artificial sweetening agent in water.
Background technology
Artificial sweetening agent is a kind of replacement of the sucrose for being widely used in food, beverage, medicine and personal care articles industry
Product, as most of artificial sweetening agent will not be degraded by human body, therefore which enters environment water in a large number, and sewage treatment plant is which
Main clustering area.Used as a class emerging pollutant, its environmental ecology risk investigation is less, now there are some researches show artificial sweetening agent meeting
Eco-toxicity is produced to aquatiles such as Mylopharyngodon piceus, Brachydanio rerio, Daphnia magna, Herba Spirodelaes.Therefore, how to have in sewage disposal system
Effect removes the concern that artificial sweetening agent is increasingly subject to people.
The advanced treatment process of sewage studies different depth science and engineerings as the important step for ensureing sewage safety dumping
Skill is significant to the impact that artificial sweetening agent is removed.In some current advanced treatment process, activated carbon adsorption, coagulation
Precipitation, cholorination only have limited removal effect to artificial sweetening agent, and UV sterilizations only have removal effect to acesulfame potassium.Ozone
Advanced oxidation processes actual sewage treatment plant add dosage and time of contact under, also can only partly remove artificial sweetening agent.
The artificial sweetening agent in actual sewage is removed using UV advanced oxidation processes and there is no systematic research.
The content of the invention
For solve prior art exist deficiency, it is an object of the invention to provide it is a kind of based on persulfate go decontamination
The advanced oxidization method of artificial sweetening agent in water, can effectively remove the artificial sweetening agent in sewage, and reaching sewage disposal will
Ask.
For achieving the above object, the present invention is by following technical solution completing, it is a kind of remove it is artificial sweet in sewage
The advanced oxidization method of taste agent, comprises the following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitation are carried out by second pond
Thing；
2) in the supernatant after the separation pH that NaOH or perchloric acid adjust solution is added to be 3-11；It is subsequently adding
The Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 1-50:1；Subsequently into Photoreactor
In carry out photoreaction, keep uniform by electromagnetic/ultrasonic composite stirring；The Photoreactor is made up of lucite, middle perpendicular
Straight placement place in quartz pipe sleeve, quartz ampoule uviol lamp, and the power of the uviol lamp is 22W or 300W；Carry out UV illumination 5-
30min, is eventually adding the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, be then fed into disinfecting tank and ClO2Reaction sterilization, most
The water outlet of the disinfecting tank drains into municipal sewage pipe network afterwards.
Further, in such scheme, the step 2) in adjust the NaOH of pH and perchloric acid solution concentration is
0.5mol/L。
Further, in such scheme, the step 2) in adjust the pH value of the supernatant be 5.
Further, in such scheme, the step 2) in Na2S2O3Molar concentration rate with sweeting agent is 50:1.
Further, in such scheme, step 2) described in uviol lamp be 22W low pressure mercury lamps, quartzy tube wall outer wall
Ultraviolet ray intensity at 254nm is 0.52uW/cm2。
Further, in such scheme, step 2) described in time of photoreaction be 30min.
Further, in such scheme, in the electromagnetic/ultrasonic composite stirring, the frequency of electromagnetic agitation is 3～20Hz,
The power of electromagnetic agitation is 2～20kW；Ultrasonic frequency range is 1kHz～10kHz, and ultrasonic power is 350W-400W.
Further, in such scheme, step 3) in carry out result analysis to the water outlet and include：Sweeting agent is dense
Degree detection and artificial sweetening agent clearance are analyzed.
The invention has the beneficial effects as follows：
1) present invention has the advantages that equipment is simple, easy to operate, expense is cheap and pollution-free, stability is high.2) this
Bright method can effectively remove the ASs in sewage, make sewage discharge reach requirement, it is to avoid pollution to environment, treatment effect
It is more economical.3) deficiency of dirty purification technique at present is compensate for, improvement prior art is poor to ASs effects, fluctuation of service shortcoming,
The blank both at home and abroad about artificial sweetening agent removal technology in water source is filled up.
Description of the drawings
Fig. 1 is the interpretation of result experiment flow figure to water sample after process；
Fig. 2 is impact result figures of the initial pH to sweeting agent removal effect；
Fig. 3 is impact result figure of the oxidant concentration to sweeting agent removal effect；
Fig. 4 is degradation kineticss (22W mercury lamps) figure of four kinds of sweeting agents；
Fig. 5 is the degradation kineticss (300W mercury lamps) of four kinds of sweeting agents.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
The present embodiment is carried out with the two stage biological water outlet of Nanjing municipal sewage plant as object, the removal sewage
The advanced oxidization method of middle artificial sweetening agent, comprises the following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitation are carried out by second pond
Thing；
2) in the supernatant after the separation NaOH or perchloric acid that concentration is 0.5mol/L is added to adjust solution
PH is 3；It is subsequently adding the Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 1:1；Then enter
Photoreaction is carried out in entering Photoreactor, keeps uniform by electromagnetic/ultrasonic composite stirring, the electromagnetic/ultrasonic composite stirring
The frequency of middle electromagnetic agitation is 3Hz, and the power of electromagnetic agitation is 2kW；Ultrasonic frequency range is 1kHz, and ultrasonic power is 350W；
The Photoreactor is made up of lucite, and center vertical is placed, and the uviol lamp is
22W low pressure mercury lamps, the ultraviolet ray intensity at quartzy tube wall outer wall 254nm are 0.52uW/cm2, carry out UV illumination 5min, finally plus
Enter the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, including sweetener concentration detection and artificial sweetening agent clearance
Analysis, is then fed into disinfecting tank and ClO2Reaction sterilization, the finally water outlet of the disinfecting tank drain into municipal sewage pipe network.
Embodiment 2
The present embodiment is carried out with the two stage biological water outlet of Nanjing municipal sewage plant as object, the removal sewage
The advanced oxidization method of middle artificial sweetening agent, comprises the following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitation are carried out by second pond
Thing；
2) in the supernatant after the separation NaOH or perchloric acid that concentration is 0.5mol/L is added to adjust solution
PH is 5；It is subsequently adding the Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 25.5:1；So
Photoreaction is carried out in Photoreactor afterwards, keeps uniform by electromagnetic/ultrasonic composite stirring, the electromagnetic/ultrasonic is combined
In stirring, the frequency of electromagnetic agitation is 11.5Hz, and the power of electromagnetic agitation is 11kW；Ultrasonic frequency range is 5.5kHz, ultrasonic work(
Rate is 375W；The Photoreactor is made up of lucite, and center vertical is placed
It is 22W low pressure mercury lamps to state uviol lamp, and the ultraviolet ray intensity at quartzy tube wall outer wall 254nm is 0.52uW/cm2, carry out UV illumination
17.5min, is eventually adding the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, including sweetener concentration detection and artificial sweetening agent clearance
Analysis, is then fed into disinfecting tank and ClO2Reaction sterilization, the finally water outlet of the disinfecting tank drain into municipal sewage pipe network.
Embodiment 3
The present embodiment is carried out with the two stage biological water outlet of Nanjing municipal sewage plant as object, the removal sewage
The advanced oxidization method of middle artificial sweetening agent, comprises the following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitation are carried out by second pond
Thing；
2) in the supernatant after the separation NaOH or perchloric acid that concentration is 0.5mol/L is added to adjust solution
PH is 11；It is subsequently adding the Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 50:1；Then
Photoreaction being carried out in Photoreactor, keeping uniform by electromagnetic/ultrasonic composite stirring, the electromagnetic/ultrasonic is compound to be stirred
The frequency for mixing middle electromagnetic agitation is 20Hz, and the power of electromagnetic agitation is 20kW；Ultrasonic frequency range is 10kHz, and ultrasonic power is
400W；The Photoreactor is made up of lucite, and center vertical is placed
Outer lamp is 300W low pressure mercury lamps, and the ultraviolet ray intensity at quartzy tube wall outer wall 254nm is 0.52uW/cm2, carry out UV illumination
30min, is eventually adding the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, including sweetener concentration detection and artificial sweetening agent clearance
Analysis, is then fed into disinfecting tank and ClO2Reaction sterilization, the finally water outlet of the disinfecting tank drain into municipal sewage pipe network.
The present embodiment is carried out with the two stage biological water outlet of Nanjing municipal sewage plant as object, the removal sewage
The advanced oxidization method of middle artificial sweetening agent, comprises the following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitation are carried out by second pond
Thing；
2) in the supernatant after the separation NaOH or perchloric acid that concentration is 0.5mol/L is added to adjust solution
PH is 5；It is subsequently adding the Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 50:1；Then
Photoreaction being carried out in Photoreactor, keeping uniform by electromagnetic/ultrasonic composite stirring, the electromagnetic/ultrasonic is compound to be stirred
The frequency for mixing middle electromagnetic agitation is 3～20Hz, and the power of electromagnetic agitation is 11kW；Ultrasonic frequency range is 5.5kHz, ultrasonic work(
Rate is 375W；The Photoreactor is made up of lucite, and center vertical is placed
It is 22W low pressure mercury lamps to state uviol lamp, and the ultraviolet ray intensity at quartzy tube wall outer wall 254nm is 0.52uW/cm2, carry out UV illumination
30min, is eventually adding the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, including sweetener concentration detection and artificial sweetening agent clearance
Analysis, is then fed into disinfecting tank and ClO2Reaction sterilization, the finally water outlet of the disinfecting tank drain into municipal sewage pipe network.
Interpretation of result
50mL water sample 0.22um composite fibre membrane filtrations are taken, is stored in 4 DEG C of refrigerators to treat follow-up solid phase extraction after filtration
Extract operation and artificial sweetening agent therewith it is quantitative.In triplicate, ± standard deviation of averaging is analyzed for each experiment.
Simple experiment flow is as shown in Figure 1.
(A) LC-MS detection sweetener concentration
Selected LC-MS instrument is the Xevo TQ-S UPLC-MS LC-MS instrument of Waters, US, adopts
With electric spray ion source (ESI), negative electricity is from multiple-reaction monitoring pattern (MRM).The parameter of multiple-reaction monitoring is shown in Table 1.
The multiple-reaction monitoring parameter of 1 artificial sweetening agent of table
Liquid phase separation select chromatographic column be Acquity UPLC BEH C18 chromatographic columns (2.1 × 50mm, 1.7um), post
Temperature is maintained at 30 DEG C.Selected mobile phase is water (A) and acetonitrile (B), it is biphase in add the ammonium acetate and 1mM of 5mM
TRIS.Mobile phase is using front ultrasound degassing.Liquid phase flow rate is 0.1mL/min, and using gradient elution, gradient elution program is shown in Table 2.
Sample size is 20uL, using automatic sampler sample introduction.
2 gradient elution program of table
(B) artificial sweetening agent clearance analysis
The concentration unit of artificial sweetening agent is ug/L herein
The clearance of artificial sweetening agent=(1-Ct/C0) × 100%, C0For initial concentration, CtFor response time t when it is sweet
Taste agent concentration.During dynamics simulation, vertical coordinate is Ln (C0/Ct), wherein C0For initial concentration, CtFor response time t when sweet taste
Agent concentration, the artificial sweetening agent of measure include ACE, SUC, CYC, SAC.
Jing analyses understand：
1st, the impact that initial pH is removed to target contaminant
Fig. 2 shows the impact situation that initial pH is removed to target contaminant, as illustrated, working as Na2S2O3With sweeting agent
Molar concentration rate is 30:When 1, when irradiating 30min using 22W low pressure mercury lamps, the AOP side when the original ph of solution is in 3-5
Removal effect of the method to all sweeting agents, is superior to pH more than or equal to the removal effect under 7 process conditions.In view of four kinds
The solution of sweeting agent adjusts the production cost of wastewater pH in being faintly acid, and actual process, select pH=5 for preferably work
Skill condition.
2、Na2S2O3The impact of target contaminant removal is compared with the molar concentration of sweeting agent
As shown in figure 3, work as pH=5, and when irradiating 30min using 22W low pressure mercury lamps, Na2S2O3With the molar concentration of sweeting agent
1:1-50:When 1, with the increase of oxidant concentration, the clearance of all target contaminants increases.In general, working as H2O2
When concentration is excessive, can be with the OH reactions for producing so as to consuming OH, so oxidant dosage has an optimal value, and UV/ again
In PDS techniques, with Na2S2O3Dosage increases, SO4-Yield increases, therefore reaction rate is constantly accelerated.In this experiment bar
Under part, when oxidant dosage reaches 50:When 1, in 30 minutes, ACE has degraded completely, and the clearance of SUC and SAC also reaches
70%, select 50 times of oxidant dosages to be more excellent dosage.
3rd, the impact that UV light application times are removed to target contaminant
In pH=5, under 30 times of oxidant dosages, the impact that light application time is degraded to four kinds of sweeting agents is as shown in figure 4, such as
Figure understands that the degradation reaction of four kinds of sweeting agents is first-order kineticses, and reaction rate constant k value is 4 × 10-4-3.7×
10-3s-1.ACE reaction rates are most fast, produce degraded as ACE sheets can absorb photon under UV lamp irradiation, and other three kinds sweet
Taste agent is non-degradable under UV lamp irradiation.Sorted with reaction rate size, ACE>CYC>SAC>SUC, SUC are a kind of persistency
Very strong Organic substance, all has extremely strong persistency, in various AOP techniques using UV/H202Process degradation artificial sweetening agent
When, the reaction rate of SUC is also minimum, and experiment finds, SAC has similar reaction rate to SUC, be also a kind of persistency very
Strong artificial sweetening agent.
4th, the impact that lamp power is removed to target contaminant
Under the conditions of 30 times of oxidant dosages, using 300W medium pressure mercury lamps as light source, degradation kineticss such as Fig. 5 institutes
Show, the degradation reaction of all contaminants meets first-order kineticses, but degradation effect is had no significantly than 22W low pressure mercury lamps
Difference, it is contemplated that the popularization of economy and actual sewage factory mesolow ultraviolet disinfecting, selects 22W low pressure mercury lamps as lamp
Light source.
In sum, the method for the present invention can effectively remove the artificial sweetening agent in sewage.
It is indicated above that the various components and parameter in the inventive method are optimum selections, the inventive method is capable of achieving
Most effective fruit.
The above, is only presently preferred embodiments of the present invention, is not the restriction for making other forms to the present invention, is appointed
What those skilled in the art possibly also with the disclosure above technology contents changed or be modified as equivalent variations etc.
Effect embodiment.But it is every without departing from technical solution of the present invention content, according to the technical spirit of the present invention to above example institute
Any simple modification, equivalent variations and the remodeling made, still falls within the protection domain of technical solution of the present invention.
Claims (8)
1. it is a kind of based on potentiometric titrations remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that bag
Include following steps：
1) make sewage flow by gravity to second pond, precipitate and separate, isolated supernatant and precipitate are carried out by second pond；
2) in the supernatant after the separation pH that NaOH or perchloric acid adjust solution is added to be 3-11；It is subsequently adding
The Na of 0.1mol/L2S2O3Solution so that Na2S2O3Molar concentration rate with sweeting agent is 1-50:1；Subsequently into Photoreactor
In carry out photoreaction, keep uniform by electromagnetic/ultrasonic composite stirring；The Photoreactor is made up of lucite, middle perpendicular
Straight placement place in quartz pipe sleeve, quartz ampoule uviol lamp, and the power of the uviol lamp is 22W or 300W；Carry out UV illumination 5-
30min, is eventually adding the NaNO that excessive weight ratio is 1.5%2With terminating reaction；
3) by step 2) water outlet carry out result analysis, be then fed into disinfecting tank and ClO2Reaction sterilization, finally this connects
The water outlet of tactile sterilization pool drains into municipal sewage pipe network.
2. the advanced oxidization method for removing artificial sweetening agent in sewage according to claim 1, its feature exists, the step
2) NaOH and perchloric acid solution concentration for adjusting pH in is 0.5mol/L.
3. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that the step
It is rapid 2) in, adjust the supernatant pH value be 5.
4. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that the step
It is rapid 2) in, Na2S2O3Molar concentration rate with sweeting agent is 50:1.
5. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that step 2)
In, the uviol lamp is 22W low pressure mercury lamps, and the ultraviolet ray intensity at quartzy tube wall outer wall 254nm is 0.52uW/cm2。
6. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that step 2)
In, the time of the photoreaction is 30min.
7. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that the electricity
In magnetic/ULTRASONIC COMPLEX stirring, the frequency of electromagnetic agitation is 3～20Hz, and the power of electromagnetic agitation is 2～20kW；Ultrasonic frequency range
It is 1kHz～10kHz, ultrasonic power is 350W-400W.
8. it is according to claim 1 remove sewage in artificial sweetening agent advanced oxidization method, it is characterised in that step 3)
In, carrying out result analysis to the water outlet includes：Sweetener concentration is detected and people.
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| CN107601786A (en) * | 2017-11-02 | 2018-01-19 | 南京大学 | The method that a kind of ozone/Ultraviolet Oxidation removes artificial sweetening agent in sewage |
| CN109002685A (en) * | 2018-06-28 | 2018-12-14 | 南京大学 | The degradation prediction technique of artificial sweetener in ultraviolet/sodium peroxydisulfate removal secondary effluent |
| CN109775903A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of acrylic fiber wastewater deep treatment method |
| CN110204032A (en) * | 2019-07-05 | 2019-09-06 | 南京大学 | A kind of technique of the advanced treating artificial sweetener sewage based on UV advanced oxidation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601786A (en) * | 2017-11-02 | 2018-01-19 | 南京大学 | The method that a kind of ozone/Ultraviolet Oxidation removes artificial sweetening agent in sewage |
| CN109775903A (en) * | 2017-11-14 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of acrylic fiber wastewater deep treatment method |
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| CN109002685A (en) * | 2018-06-28 | 2018-12-14 | 南京大学 | The degradation prediction technique of artificial sweetener in ultraviolet/sodium peroxydisulfate removal secondary effluent |
| CN109002685B (en) * | 2018-06-28 | 2021-11-16 | 南京大学 | Degradation prediction method for removing artificial sweetener in secondary effluent by ultraviolet/sodium persulfate |
| CN110204032A (en) * | 2019-07-05 | 2019-09-06 | 南京大学 | A kind of technique of the advanced treating artificial sweetener sewage based on UV advanced oxidation |
| CN110204032B (en) * | 2019-07-05 | 2021-09-28 | 南京大学 | Advanced treatment process for artificial sweetener sewage based on UV advanced oxidation |
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