CN109603878A - It is a kind of to utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater - Google Patents
It is a kind of to utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater Download PDFInfo
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- CN109603878A CN109603878A CN201811567138.4A CN201811567138A CN109603878A CN 109603878 A CN109603878 A CN 109603878A CN 201811567138 A CN201811567138 A CN 201811567138A CN 109603878 A CN109603878 A CN 109603878A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 47
- 230000004913 activation Effects 0.000 title claims abstract description 35
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical compound OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012545 processing Methods 0.000 title claims abstract description 13
- 238000006731 degradation reaction Methods 0.000 claims abstract description 41
- 239000002957 persistent organic pollutant Substances 0.000 claims abstract description 31
- 230000015556 catabolic process Effects 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005286 illumination Methods 0.000 claims abstract description 8
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Chemical compound [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 claims description 32
- 230000003197 catalytic effect Effects 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 15
- FJVZDOGVDJCCCR-UHFFFAOYSA-M potassium periodate Chemical compound [K+].[O-]I(=O)(=O)=O FJVZDOGVDJCCCR-UHFFFAOYSA-M 0.000 claims description 10
- 239000010815 organic waste Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 150000003254 radicals Chemical class 0.000 abstract description 5
- 231100000331 toxic Toxicity 0.000 abstract description 5
- 230000002588 toxic effect Effects 0.000 abstract description 5
- 239000000975 dye Substances 0.000 abstract description 3
- 239000005416 organic matter Substances 0.000 abstract description 3
- 230000000593 degrading effect Effects 0.000 abstract description 2
- 230000001089 mineralizing effect Effects 0.000 abstract description 2
- 238000005067 remediation Methods 0.000 abstract description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 35
- 229940043267 rhodamine b Drugs 0.000 description 35
- 238000012360 testing method Methods 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000013019 agitation Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 6
- 239000001230 potassium iodate Substances 0.000 description 4
- 235000006666 potassium iodate Nutrition 0.000 description 4
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 4
- 229940093930 potassium iodate Drugs 0.000 description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
- 229940106691 bisphenol a Drugs 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000005374 membrane filtration Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000015281 sodium iodate Nutrition 0.000 description 2
- 239000011697 sodium iodate Substances 0.000 description 2
- 229940032753 sodium iodate Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical class [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- NNGHIEIYUJKFQS-UHFFFAOYSA-L hydroxy(oxo)iron;zinc Chemical compound [Zn].O[Fe]=O.O[Fe]=O NNGHIEIYUJKFQS-UHFFFAOYSA-L 0.000 description 1
- -1 hydroxyl radical free radical Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-M periodate Chemical compound [O-]I(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-M 0.000 description 1
- 230000002186 photoactivation Effects 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000759 toxicological effect Toxicity 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000003403 water pollutant Substances 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
Abstract
G-C is utilized the present invention provides a kind of3N4The method of heterogeneous activation periodate processing organic wastewater, this method is to utilize g-C3N4Periodate is activated to generate the toxic organic pollutant in strong oxidizing property free radical mineralizing and degrading waste water under illumination condition, to achieve the purpose that wastewater treatment or water remediation.The method of the present invention is easy to operate, low in cost, and economic serviceability is high, and organic matter degradation is high-efficient, is particularly suitable for the waste water containing organic dyestuff, can also be used to handle the low used water difficult to degradate of some biodegradabilities.Moreover, the present invention is solved the problems, such as without introducing metal ion containing secondary pollution caused by heavy metal catalyst.
Description
Technical field
The present invention relates to a kind of processing methods of high poison organic wastewater, and in particular to a kind of to utilize g-C3N4Heterogeneous activation
The method of periodate processing organic wastewater.
Background technique
In recent years, the increasing fast of persistent organic pollutants ingredient keeps water pollution situation increasingly severe in sewage, more
It is frequently detected in Different Waters come more Recalcitrant chemicals.According to statistics, worldwide, it is detected altogether in each water body
More than 2000 kinds organic pollutants out, just 767 kinds of detection in drinking water, there are also quite a few pollutants to have potential " three
Cause effect ", i.e., " carcinogenic, teratogenesis, mutagenesis ".These hardly degraded organic substances are difficult to effectively be gone by standard biologic process mostly
It removes, and can also cause serious toxicological effect and ecological hazard in continuous cumulative process.How to effectively remove all kinds of in water
Pollutant, especially toxic persistent organic pollutants have become water treatment field problem urgently to be resolved.
Periodate high-level oxidation technology is that (mainly have iodate by the strong oxidizing property free radical for activating generation in reaction
Free radical, hydroxyl radical free radical and singlet oxygen etc.) it degrades and mineralising toxic organic pollutant, finally turn organic pollutant molecule
Carbon dioxide and water are turned to, to achieve the purpose that removing toxic substances.Periodate high-level oxidation technology have contaminant degradation it is high-efficient,
The advantages that reaction speed is fast, easy to operate controllable, the biodegradability of toxic wastewater can be improved using this technology, have practical
Application value.Periodate ion is relatively stable when individualism in water environment, it is difficult to the direct oxidation degradation organic dirt of water body
Contaminate object, it usually needs rapidly reaction effect is just had in the presence of having catalyst.
Carbonitride (g-C3N4) it is a kind of cheap effective photochemical catalyst, powder can be made by thermal decomposition melamine
State carbonitride.Studies have shown that under the conditions of radiation of visible light, g-C3N4Itself certain photocatalysis performance can be shown, it can
Degradation organic pollutants in water body.But g-C3N4Simple Photocatalytic Degradation Process is more slow, therefore has scholar by g-C3N4
With H2O2, persulfate combine, pass through g-C3N4The above-mentioned oxidant of photo catalytic activation generates strong oxidative free radical degradation water pollution
Object.The process can be carried out quickly at normal temperature, and reaction condition is simple, apply heat without additional.Such as CN108772095A public affairs
It has opened and has used a kind of efficient degradation antibiotic visible light catalytic composite material (g-C3N4/ZnO/ZnFe2O4) preparation method；Specially
Sharp CN108380235A discloses a kind of preparation method and applications of heterogeneous class fenton catalyst of graphite phase carbon nitride base, adopts
With metal-doped g-C3N4PPCPs pollutant in composite material catalytic activation persulfate PMS degradation water body.
But above-mentioned catalysis is required to introduce heavy metal ion to improve g-C3N4Catalytic activity, and heavy metal ion
Introducing secondary pollution inevitably is caused to waste water to be processed.Therefore, it is high-efficient to develop a kind of organic matter degradation, and not
The method for processing organic wastewater that will cause secondary pollution is necessary.
Summary of the invention
G-C is utilized it is an object of the invention to provide a kind of3N4The side of heterogeneous activation periodate processing organic wastewater
Method, to solve the problems, such as that existing method need to introduce heavy metal modified catalyst and bring secondary pollution.
The object of the present invention is achieved like this:
It is a kind of to utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, is utilized under illumination condition
g-C3N4Organic pollutant in catalytic activation periodate mineralizing and degrading organic waste water.
The method of the present invention specifically includes the following steps:
A, periodate is added in organic wastewater to be processed, is stirred, be uniformly mixed waste water and periodate, obtain mixture
System；
B, g-C is added in Xiang Shangshu mixed system3N4Particle, under illumination condition, periodate generates strong oxygen by catalytic decomposition
Change the organic pollutant that free love base is degraded in organic wastewater to be processed, degradation process carries out at room temperature.To degradation process knot
Shu Hou is staticly settled, by g-C3N4Particle filtering comes out.
In the method for the present invention, before handling organic wastewater to be processed, its pH is first adjusted to 4 ~ 10, preferably 5 ~
6.5.Fig. 1 is process flow diagram of the invention.
The illumination condition is sunlight irradiation, daylight light irradiation.
The periodate is one or both of sodium metaperiodate, potassium metaperiodate.
The organic wastewater to be processed is the waste water containing organic dyestuff.
In the method for the present invention, the molar ratio of periodate and organic pollutant can according to pollutant characteristic, concentration and
Processing requirement controls between 1 ~ 25: 1；Periodate and g-C3N4Molar ratio be 1: 10 ~ 20.
The present invention utilizes g-C3N4Periodate is activated to generate in strong oxidizing property free radical cracking waste water under illumination condition
Toxic organic pollutant, to achieve the purpose that wastewater treatment or water remediation.Moreover, g-C after reaction3N4It can rapid precipitation time
It receives, the not generation of sludge, with good application prospect.
The method of the present invention is easy to operate, low in cost, and economic serviceability is high, and organic matter degradation is high-efficient, is particularly suitable for
Waste water containing organic dyestuff shows to compare g-C3N4/H2O2And g-C3N4The higher degradation efficiency of/persulfate system, can also be with
For handling the low used water difficult to degradate of some biodegradabilities.Moreover, the present invention is solved without introducing heavy metal ion containing a huge sum of money
Secondary pollution problem caused by metal catalyst.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Fig. 2 is degradation removal rate curve graph of the differential responses system to Organic Pollutants in Wastewater rhodamine B；
In figure, curve a is g-C under the conditions of the natural light of embodiment 13N4The drop of heterogeneous activation periodate rhodamine B degradation
Solve removal rate curve；Curve b be embodiment 2 visible light conditions under periodate rhodamine B degradation degradation removal rate curve；
Curve c be embodiment 2 visible light conditions under (visible light source irradiation under) g-C3N4Heterogeneous activation periodate degradation Luo Dan
The degradation removal rate curve of bright B.
Fig. 3 is g-C under visible light conditions3N4The Repeatability test curve of heterogeneous activation periodate rhodamine B degradation
Figure.
Specific embodiment
Below with reference to embodiment, the present invention is further elaborated, the process being not described in detail in the following embodiments and
Method is conventional method well known in the art, and raw materials used or reagent is unless otherwise stated commercially available product in embodiment, can be led to
Commercial channel is crossed to buy.
Embodiment 1: g-C under the conditions of natural light3N4Heterogeneous activation sodium metaperiodate degradable organic pollutant
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
Sodium metaperiodate is added, makes its concentration 1mmol/L, magnetic agitation mixes well it, and adjusts mixed liquor initial pH value and be
5.0.Then, g-C then into above-mentioned system is added3N4Particle, makes its concentration 1.0g/L, and 20 DEG C of progress catalytic degradations of room temperature are anti-
It answers.G-C is not added under setting the same terms3N4The system of particle is as control experiment.
In reaction process, in fixed reaction time point --- 0,5,10,20,30,45,60min time point it is separately sampled
1mL, the 2mol/L sodium thiosulfate that 0.1 mL is added into the sample of taking-up terminates reaction, immediately through 0.22 μm of membrane filtration
Afterwards, using ultraviolet specrophotometer at wavelength 544nm, remaining rhodamine B concentration in test sample, and calculate rhodamine B
Degradation rate, as a result see curve a in Fig. 2.
Testing result shows, can individually be degraded in 60min the rhodamine B of removal 2% using sodium metaperiodate, and uses
g-C3N4Particulate catalytic activation sodium metaperiodate can then degrade in 60min remove 31% rhodamine B.
Embodiment 2: g-C under visible light conditions3N4Heterogeneous activation sodium metaperiodate degradable organic pollutant
To in 100 mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
Sodium metaperiodate is added, makes its concentration 1mmol/L, magnetic agitation mixes well it, and adjusts mixed liquor initial pH value and be
5.0.Then, g-C then into above-mentioned system is added3N4Particle makes its concentration 1.0g/L, opens simultaneously the 500W above system
Visible light source carries out catalytic degradation reaction at 20 DEG C of room temperature.G-C is not added under setting the same terms3N4The system conduct pair of particle
According to the facts test.
In reaction process, in fixed reaction time point --- 0,5,10,20,30,45,60min time point it is separately sampled
1mL, the 2mol/L sodium thiosulfate that 0.1 mL is added into the sample of taking-up terminates reaction, immediately through 0.22 μm of membrane filtration
Afterwards, using ultraviolet specrophotometer at wavelength 544nm, remaining rhodamine B concentration in test sample, and calculate rhodamine B
Degradation rate, as a result see the curve b and curve c in Fig. 2.
Testing result shows, can individually degrade in 60min using photoactivation sodium metaperiodate remove 87% rhodamine B,
And g-C is used under visible light conditions3N4Particulate catalytic activation sodium metaperiodate can then degrade in 30min remove 94.7% sieve
The rhodamine B of degradation removal 100% in red bright B, 60min.
Embodiment 3: reperformance test
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
Sodium metaperiodate is added, makes its concentration 1mmol/L, magnetic agitation mixes well it, and adjusts mixed liquor initial pH value and be
5.0.Then, g-C then into above-mentioned system is added3N4Particle makes its concentration 1.0g/L, opens simultaneously the 500W above system
Visible light source carries out catalytic degradation reaction at 20 DEG C of room temperature.
After reaction carries out 60min, visible light source is closed, the 1000mg/L rhodamine B of 2 mL is added again into system
With the 20mmol/L sodium metaperiodate of 5 mL, and adjust mixed liquor pH value be 5.0.Then, light source starting reaction, reaction are again turned on
Time remains as 60min.Method is repeated 2 times according to this.
During each reaction, in the fixed reaction time separately sampled 1mL of point, 0.1 mL is added into the sample of taking-up
2mol/L sodium thiosulfate terminate reaction, immediately after 0.22 μm of membrane filtration, using ultraviolet specrophotometer in wavelength
At 544 nm, remaining rhodamine B concentration in test sample, and the degradation rate of rhodamine B is calculated, as a result see Fig. 3.
The results show that g-C3N4It can be recycled and reused for heterogeneous activation periodate rhodamine B degradation under visible light conditions.
Embodiment 4
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
Sodium metaperiodate is added, makes its concentration 1mmol/L, magnetic agitation mixes well it, and adjusts mixed liquor initial pH value and be
5.0.Then, g-C then into above-mentioned system is added3N4Particle makes its concentration 1.84g/L (sodium metaperiodate and g-C3N4Rub
Your ratio is 1:20), the 500W visible light source above system is opened simultaneously, carries out catalytic degradation reaction at 20 DEG C of room temperature.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Sodium iodate can then degrade in 30min removal 100% rhodamine B.
Embodiment 5
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
Sodium metaperiodate is added, makes its concentration 1mmol/L, magnetic agitation mixes well it, and adjusts mixed liquor initial pH value and be
5.0.Then, g-C then into above-mentioned system is added3N4Particle makes its concentration 0.92g/L (sodium metaperiodate and g-C3N4Mole
Ratio is 1:10), the 500W visible light source above system is opened simultaneously, carries out catalytic degradation reaction at 20 DEG C of room temperature.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Sodium iodate can then degrade in 30min removal 91.8% rhodamine B.
Embodiment 6: g-C under visible light conditions3N4Heterogeneous activation potassium metaperiodate degradable organic pollutant
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
1mmol potassium metaperiodate is added, magnetic agitation mixes well it, and adjusting mixed liquor initial pH value is 4.0.Then, then upwards
State the g-C that 1.0g is added in system3N4Particle opens simultaneously the 500W visible light source above system, is urged at 20 DEG C of room temperature
Change degradation reaction.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Potassiumiodate can degrade the rhodamine B of removal 89.8% in 30min, the rhodamine B of degradation removal 99% in 60min.
Embodiment 7: g-C under visible light conditions3N4Heterogeneous activation potassium metaperiodate degradable organic pollutant
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
1mmol potassium metaperiodate is added, magnetic agitation mixes well it, and adjusting mixed liquor initial pH value is 10.0.Then, then to
The g-C of 1.0g is added in above-mentioned system3N4Particle opens simultaneously the 500W visible light source above system, carries out at 10 DEG C of room temperature
Catalytic degradation reaction.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Potassiumiodate can degrade the rhodamine B of removal 69.8% in 30min, the rhodamine B of degradation removal 90.3% in 60min.
Embodiment 8: g-C under visible light conditions3N4Heterogeneous activation potassium metaperiodate degradable organic pollutant
To in 100mL waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
1mmol potassium metaperiodate is added, magnetic agitation mixes well it, and adjusting mixed liquor initial pH value is 6.5.Then, then upwards
State the g-C that 1.0g is added in system3N4Particle opens simultaneously the 500W visible light source above system, is urged at 10 DEG C of room temperature
Change degradation reaction.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Potassiumiodate can degrade in 30min removal 98.3% rhodamine B, in 60min degradation removal 100% rhodamine B.
Embodiment 9: g-C under visible light conditions3N4Heterogeneous activation potassium metaperiodate degradable organic pollutant
It is added in 1L waste water to be processed (containing persistent organic pollutants bisphenol-A in the waste water, concentration is 20 mg/L)
1mmol potassium metaperiodate, magnetic agitation mix well it.Then, the g-C of 1.0g then into above-mentioned system is added3N4Particle, together
When opening system above 500W visible light source, carry out catalytic degradation reaction at 10 DEG C of room temperature.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activation is high
Potassiumiodate can degrade the bisphenol-A of removal 91.2% in 30min, the bisphenol-A of degradation removal 100% in 60min.
Comparative example 1: g-C under visible light conditions3N4Heterogeneous activation sodium peroxydisulfate degradable organic pollutant
It is added in 1L waste water to be processed (containing persistent organic pollutants rhodamine B in the waste water, concentration is 20 mg/L)
1mmol sodium peroxydisulfate, magnetic agitation mix well it.Then, the g-C of 1.0g then into above-mentioned system is added3N4Particle, together
When opening system above 500W visible light source, carry out catalytic degradation reaction at 20 DEG C of room temperature.
With embodiment 1, testing result is shown detection method, and g-C is used under visible light conditions3N4Particulate catalytic activated
Sodium sulphate can degrade the rhodamine B of removal 47.2% in 30min, the rhodamine B of degradation removal 70.5% in 60min.
Claims (5)
1. a kind of utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, which is characterized in that in illumination condition
Under, utilize g-C3N4Organic pollutant in catalytic activation periodate degradation of organic waste water.
2. according to claim 1 utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, feature
It is, comprising the following steps:
A, periodate is added in organic wastewater to be processed, is stirred, be uniformly mixed the two, obtain mixed system；
B, g-C is added in Xiang Shangshu mixed system3N4Particle, under illumination condition, periodate generates Strong oxdiative by catalytic activation
Free love base is degraded the organic pollutant in organic wastewater to be processed.
3. according to claim 1 utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, feature
It is, the illumination condition is sunlight irradiation or daylight light irradiation.
4. according to claim 1 utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, feature
It is, the periodate is one or both of sodium metaperiodate, potassium metaperiodate.
5. according to claim 1 utilize g-C3N4The method of heterogeneous activation periodate processing organic wastewater, feature
It is, degradation process carries out at room temperature.
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