CN109095590A - LaFe1-xCuxO3The method for handling residue in water Atrazine - Google Patents
LaFe1-xCuxO3The method for handling residue in water Atrazine Download PDFInfo
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- CN109095590A CN109095590A CN201811010021.6A CN201811010021A CN109095590A CN 109095590 A CN109095590 A CN 109095590A CN 201811010021 A CN201811010021 A CN 201811010021A CN 109095590 A CN109095590 A CN 109095590A
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- 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
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- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
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- 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
- C02F2101/306—Pesticides
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Abstract
A kind of LaFe1‑xCuxO3The method for handling residue in water Atrazine: it is added after peroxy-monosulfate mixes into organic wastewater and adds LaFe1‑xCuxO3Material degrades to atrazine-contaminated object as heterogeneous catalysis, stirring；Concentration of the peroxy-monosulfate in organic wastewater is 0.25-1 mM/ls.The present invention is with LaFe1‑xCuxO3As heterogeneous catalysis, in LaFe1‑xCuxO3It exists simultaneously down with peroxy-monosulfate and is reacted with Atrazine to be processed, LaFe1‑xCuxO3Fe (III)/Fe (II) and Cu (II)/Cu (I) in material are the potentiometric titrations that main active component and peroxy-monosulfate haptoreaction generate strong oxidizing property, then potentiometric titrations are by the Atrazine degradation difficult to degrade in water, to achieve the purpose that purifying water body.
Description
Technical field
The invention belongs to field of water pollution control, and in particular to a kind of LaFe1-xCuxO3Material is living as heterogeneous catalysis
Change the method for permonosulphuric acid salt treatment residue in water Atrazine.
Background technique
Atrazine (atrazine) also known as atrazine are a kind of by long-term widely used triazine herbicide.Due to
Atrazine has water-soluble strong, stable structure and the not characteristics such as easily biological-degradable, causes by its contaminated soil through rainwater
Wash away the pollution that may cause earth's surface and underground water.The male frog can be caused to feminize into the Atrazine in water environment, the U.S., Europe
Alliance and Japan have been included in endocrine disrupting compounds list.It dives in addition, Atrazine is also considered as to have the mankind
In the compound of carcinogenic risk.Therefore, the reduction mode of Atrazine is of great significance in research environment water body.
Due to conventional Water purification and sewage treatment process be with go water removal in suspend and colloid pollution object based on, to organic
Pollutant, it is especially extremely limited to the removal ability of pesticide pollutant or even helpless.Therefore, it is necessary to by depth
Processing technique further ensures water quality safety.Wherein, it is based on potentiometric titrations (SO4 ·-) high-level oxidation technology in recent years
To cause extensive concern in water depth process field.SO4 ·-It is (to specifically include that peroxy-monosulfate by activating persulfate
(peroxymonosulfate, PMS) and peroxydisulfate (persulfate, PS)) and generate.Persulfate is solid
Substance, transport, store, adding, more convenient operation it is wide.The method of activation persulfate includes heat treatment, microwave radiation, purple at present
The methods of external exposure, ultrasonic coupling and transition metal ion catalyst.
Wherein, the technologies such as heat treatment, microwave radiation, ultraviolet irradiation and ultrasonic coupling need to be additionally provided energy, Er Qieqi
Device systems are complex.Transition metal ions activation method reaction condition is mild, it is easy to operate, be easily achieved, but introduce
Metal ion (especially Co2+) need that other measures is taken to be removed after the completion of reaction, not only increase technique operation at
This, and increase the water environment ecological risk of water outlet.
Heterogeneous activation persulfate technology can realize the strong of persistent organic pollutants in water body at normal temperatures and pressures
Change removal.This technique avoids the defect for introducing toxic metal ions to water body, catalyst can be disposably filled in reactor,
It is easy to operate, convenient for being applied in actual water treatment technology.But currently used catalyst is low there are catalytic efficiency and has
There is certain selectivity, it is difficult to meet actual demand.Therefore, there is an urgent need to develop with preparation is economical, efficient catalyst, application
Among heterogeneous activation persulfate technology, to solve the problems, such as the removal of persistent organic pollutants in water body.
Summary of the invention
The object of the present invention is to provide a kind of LaFe1-xCuxO3Material activates at peroxy-monosulfate as heterogeneous catalysis
The method for managing residue in water Atrazine.
To achieve the above object, LaFe provided by the invention1-xCuxO3The method for handling residue in water Atrazine:
It is added into organic wastewater after peroxy-monosulfate mixes and adds LaFe1-xCuxO3Material as heterogeneous catalysis,
Stirring, degrades to atrazine-contaminated object；Concentration of the peroxy-monosulfate in organic wastewater is 0.25-1 mM/ls.
The method, wherein concentration of the peroxy-monosulfate in Atrazine residual waste water is 0.25-1 mmoles
You/liter.
The method, wherein the LaFe1-xCuxO3Mass concentration in organic wastewater is 0.25-1.5 grams per liter.
The method, wherein LaFe1-xCuxO3After remaining wastewater treatment to Atrazine, LaFe therein is recycled1- xCuxO3, degradation treatment is carried out to Atrazine waste water as catalyst again.
The method, wherein after peroxy-monosulfate is added in organic wastewater, adjust the pH value of gained pollutant aqueous solution
For 2.0-10.0, LaFe is then added1-xCuxO3。
The method, wherein the peroxy-monosulfate be one of potassium hydrogen peroxymonosulfate and hydrogen peroxymonosulfate sodium with
On.
The method, wherein the LaFe1-xCuxO3Material is obtained by following methods:
Step 1: weighing La (NO respectively3)3·6H2O、Fe(NO3)3·9H2O、Cu(NO3)2·3H2O and C6H8O7·H2O,
It is dissolved in water, and is stirred under condition of water bath heating, obtain wet gel；Wherein La (NO3)3·6H2O、Fe(NO3)3·9H2O、Cu
(NO3)2·3H2O and C6H8O7·H2The molar ratio of O is 1:(1-x): x:6, x=0.1,0.2,0.3,0.4,0.5 in formula；
Step 2: wet gel in vacuum oven in drying；
Step 3: being calcined after 350-450 DEG C of pre-burning then at 650-700 DEG C, obtain target product.
The method, wherein amount of water is so that metal ion total concentration is not higher than 0.02mol/L.
The method, wherein LaFe1-xCuxO3The specific surface area of material is 13.8-18.8m2/ g, average grain diameter 15-
38nm, average pore size 14.3-18.2nm.
The method, wherein the bath temperature of step 1 is 85-95 DEG C；The drying temperature of step 2 is 95-120 DEG C.
Compared with prior art, the invention has the following advantages that
(1) LaFe provided by the invention1-xCuxO3Preparation method it is simple, reaction condition is simply mild, to external environment item
Part is without particular/special requirement, and easy to operate, repetitive operation is strong, it is easy to accomplish.
(2) provided by the invention to utilize LaFe1-xCuxO3Peroxy-monosulfate oxidation processes skill is activated as heterogeneous catalysis
Art, can more efficient activation peroxy-monosulfate decompose and generate potentiometric titrations and hydroxyl radical free radical, the utilization rate of free radical is high,
It is reaction period, good to the removal effect of pollutant.
(3) present invention uses LaFe1-xCuxO3It is 2.0-10.0 range in pH to peroxy-monosulfate as heterogeneous catalysis
Inside all having very high catalytic activity makes that it is suitable for the pH value of waste water of processing to widen significantly, effectively reduces acid-base accommodation expense
With.
(4) LaFe of the invention1-xCuxO3Material utilization amount is less, and can efficiently activate in room temperature, without conditions such as illumination
Peroxy-monosulfate reduces the cost of sewage treatment, LaFe after reaction1-xCuxO3Material is easier to the recycling from solution and repeats benefit
With without secondary pollution.
(5) operation of the present invention is simple, and high catalytic efficiency, condition is easily-controllable, economically feasible, is suitable for the depth of various organic wastewaters
Degree processing.
Detailed description of the invention
Fig. 1 is LaFe prepared by the present invention0.8Cu0.2O3X-ray powder diffraction (XRD) map of material.
Fig. 2 is LaFe prepared by the present invention0.8Cu0.2O3Scanning electron microscope (SEM) map of material.
Fig. 3 is degradation of the Atrazine under different materials.
Fig. 4 is prepared LaFe under the conditions of different initial pH0.8Cu0.2O3Material activates persulfate to Atrazine
Degradation.
Specific embodiment
The present invention is proposed in lanthanum iron perovskite LaFeO3On the basis of using Cu element preparation is replaced to the part of Fe element
LaFe1-xCuxO3Material is degraded the water treatment technology of remains of pesticide difficult to degrade for efficiently activating peroxy-monosulfate.By LaFe1- xCuxO3As the heterogeneous catalysis of peroxy-monosulfate, the sulfuric acid that peroxy-monosulfate generates strong oxidizing property can be efficiently activated
Root free radical (SO4 ·-) and hydroxyl radical free radical (HO), and then can achieve the purpose of efficiently removal persistent organic pollutants.
The reaction can carry out in extensive pH value range, and catalyst amount is few, and the reaction time is short, while have catalysis oxidation fast
The advantages that rate is high, and equipment is simple and convenient to operate, is environmental-friendly, catalyst is easily recycled, in the advanced treating field of waste water
There is very big application potential.
The present invention be directed to secondary dirt of the metal ion to environment in existing homogeneous catalysis peroxy-monosulfate reaction system
Dye increases processing cost and LaFeO3The problems such as catalytic efficiency is lower provides a kind of using LaFe1-xCuxO3Material is heterogeneous
The method for activating permonosulphuric acid salt treatment atrazine difficult to degrade, method of the invention is a kind of advanced oxidization method, energy
It is enough effectively to solve the above problems.LaFe1-xCuxO3Efficient catalytic activation peroxy-monosulfate quickly and effectively removes poisonous and harmful in waste water
Refractory organic, while this method can introduce two kinds of transition-metal Fes simultaneously and Cu synergistic effect improves activation effect
Fruit.
The present invention is with LaFe1-xCuxO3As heterogeneous catalysis, in LaFe1-xCuxO3It is existed simultaneously with peroxy-monosulfate
It is lower to be reacted with Atrazine to be processed, LaFe1-xCuxO3Fe (III)/Fe (II) and Cu (II)/Cu (I) in material are main
Active component and peroxy-monosulfate haptoreaction generate the potentiometric titrations of strong oxidizing property, and then potentiometric titrations will be in water
Atrazine degradation difficult to degrade, to achieve the purpose that purifying water body.
The invention is realized by the following technical scheme:
First prepare LaFe1-xCuxO3Material, step are as follows:
1) La (NO is weighed respectively3)3·6H2O、Fe(NO3)3·9H2O、Cu(NO3)2·3H2O and C6H8O7·H2O adds water
Dissolution, and stirred under condition of water bath heating, obtain wet gel；Wherein La (NO3)3·6H2O、Fe(NO3)3·9H2O、Cu
(NO3)2·3H2O and C6H8O7·H2The molar ratio of O is 1:(1-x): x:6, x=0.1,0.2,0.3,0.4,0.5 in formula；
2) wet gel in vacuum oven in drying；
3) it is calcined after 350-450 DEG C of pre-burning then at 650-700 DEG C, obtains target product LaFe1-xCuxO3, and be ground to
Uniform fine grained is spare.
Wherein, obtained LaFe1-xCuxO3For the reunion shape nano particle that form is uniform, specific surface area 13.8-
18.8m2/ g, average grain diameter 15-38nm, average pore size 14.3-18.2nm.
Wherein, amount of water is so that metal ion total concentration is not higher than 0.02mol/L, and the bath temperature of step 1 is 85-95
DEG C, the drying temperature of step 2 is 95-120 DEG C.
The present invention utilizes LaFe1-xCuxO3Material as heterogeneous catalysis activation permonosulphuric acid salt treatment residue in water Ah
The method of Te Lajin, comprising the following steps: to peroxy-monosulfate is added in waste water containing Atrazine, after mixing, add
LaFe1-xCuxO3, it is put into shaking table and stirs, degrades to the pollutant.
Preferably, after peroxy-monosulfate being added into organic wastewater, the pH value for adjusting gained organic wastewater solution is 2.0-
10.0, then add LaFe1-xCuxO3。
Preferably, the peroxy-monosulfate is one or more of potassium hydrogen peroxymonosulfate and hydrogen peroxymonosulfate sodium.
Preferably, concentration of the peroxy-monosulfate in Atrazine residual waste water is 0.25-1 mM/ls.
Preferably, the LaFe1-xCuxO3Mass concentration in Atrazine residual waste water is 0.25-1.5 grams per liter.
Preferably, the revolving speed of the shaking table is 50-300rpm.
Preferably, the time of the stirring is 5-90min.
Preferably, the LaFe1-xCuxO3After remaining wastewater treatment to Atrazine, LaFe therein is recycled1-xCuxO3,
Degradation treatment is carried out to Atrazine waste water as catalyst again.
Referring to Fig. 1, being using LaFe prepared by the x-ray diffractometer measurement present invention0.8Cu0.2O3Material, from Fig. 1
It was found that LaFe0.8Cu0.2O3Crystal form and LaFeO3Unanimously, show crystalline structure of the doping without destruction perovskite of Cu.
Fig. 2 is the LaFe prepared using scanning electron microscope observation0.8Cu0.2O3Material is grain from Fig. 2 discovery material
The uniform agglomeration nano-grade granular solids of diameter.
Specific implementation of the invention is further described below in conjunction with example and attached drawing, but embodiments of the present invention
It is without being limited thereto.
Embodiment 1: it compares and utilizes LaFe1-xCuxO3Material activation peroxy-monosulfate is individually added into LaFe1-xCuxO3Material
Expect and be individually added into the removal rate of Atrazine under three kinds of modes of peroxy-monosulfate.
(1) LaFe of different doping ratios is utilized1-xCuxO3(LaFeO3、LaFe0.9Cu0.1O3、LaFe0.8Cu0.2O3、
LaFe0.7Cu0.3O3、LaFe0.6Cu0.4O3、LaFe0.5Cu0.5O3) material activation peroxy-monosulfate hydrogen potassium heterogeneous reaction in, adopt
Use conical flask as reactor, waste water reaction volume is 200mL, and treatment conditions are that the initial concentration of waste water containing Atrazine is
5.0mg/L, while LaFe being added into reaction flask1-xCuxO3Material and potassium hydrogen peroxymonosulfate make its concentration be respectively 0.5g/L and
0.5mmol/L, and reaction flask is placed in shaking table, revolving speed 180rpm, temperature is room temperature.
(2) it is individually added into LaFe1-xCuxO3In material experiment, using LaFe0.8Cu0.2O3Material does not need that a sulphur was added
Potassium hydrogen phthalate, the same reaction system of other conditions (1).
(3) it is individually added into potassium hydrogen peroxymonosulfate experiment, does not need that LaFe is added1-xCuxO3, the same reaction system of other conditions
(1)。
Atrazine removal rate result is shown in Fig. 3 in above 3 kinds of systems.
Fig. 3 the result shows that, be used alone LaFe1-xCuxO3Material and potassium hydrogen peroxymonosulfate system is used alone all fails pair
Atrazine carries out effectively degradation and removes, and LaFe1-xCuxO3Material activates the drop in potassium hydrogen peroxymonosulfate system to Atrazine
Effect highly significant is solved, after reacting 90min, LaFe0.8Cu0.2O3、LaFe0.7Cu0.3O3、LaFe0.6Cu0.4O3、LaFe0.5Cu0.5O3
Material catalytic degradation ability all reaches 99.0% or more, wherein LaFe0.6Cu0.4O3And LaFe0.5Cu0.5O3After reacting 10min all
99% or more removal effect can be reached.And the material of Cu doping has been carried out than undoped LaFeO3Material has stronger catalysis
Degradation capability.Illustrate that the present invention can fast and effeciently handle difficult biochemical waste water.Meanwhile latter embodiments with activation effect compared with
Good LaFe0.8Cu0.2O3For material, the explanation of degradation situation is carried out.
Embodiment 2: different LaFe are compared0.8Cu0.2O3Influence of the material dosage to Atrazine removal rate
(1) LaFe is utilized0.8Cu0.2O3Material catalyst activates in the heterogeneous reaction of potassium hydrogen peroxymonosulfate, using taper
Bottle is used as reactor, and waste water reaction volume is 200mL, and treatment conditions are that the initial concentration of waste water containing Atrazine is 5.0mg/L, instead
It should start to go to addition potassium hydrogen peroxymonosulfate in reaction flask to make its concentration 0.5mmol/L, while be added into reaction flask
LaFe0.8Cu0.2O3Material makes its reaction density 0.25g/L, finally reaction flask is placed in concussion bed, revolving speed 180rpm,
Temperature is room temperature, time 90min.
(2) in reaction waste LaFe0.8Cu0.2O3Material is 0.75g/L, is only to add LaFe0.8Cu0.2O3Material by its
Dosage is adjusted to 0.75g/L, the same reaction system of other conditions (1).
(3) in reaction waste LaFe0.8Cu0.2O3Material is 1.5g/L, is only to add LaFe0.8Cu0.2O3Material is thrown
Dosage is adjusted to 1.5g/L, the same reaction system of other conditions (1).Different LaFe is found through overtesting0.8Cu0.2O3Material is useless
Concentration in water all has preferable degradation effect to activation potassium hydrogen peroxymonosulfate degradation Atrazine, substantially as material
The increase of dosage and increase, but when dosage increase is too big effect increase it is unobvious, because of potassium hydrogen peroxymonosulfate
Depletion rate may become faster, and excessive LaFe1-xCuxO3Material can generate free radical cover to a certain extent
The effect of covering.System (1), (2), (3) various concentration LaFe1-xCuxO3Material effects substantially can be with 100% drop in 60min
Solve Atrazine.Illustrate LaFe0.8Cu0.2O3Material activity is high, and dosage is few.Therefore have in the organic wastewater of difficult biochemical treatment
Wide application prospect.
Embodiment 3: influence of the different potassium hydrogen peroxymonosulfate dosages to activation degradation Atrazine
(1) LaFe is utilized0.8Cu0.2O3In the heterogeneous reaction of catalytic activation potassium hydrogen peroxymonosulfate, using conical flask conduct
Reactor, the organic wastewater 200mL that processing Atrazine initial concentration is 5.0mg/L, hydrogen peroxymonosulfate is added into reaction flask
Potassium, while LaFe is added into reaction flask0.8Cu0.2O3, make potassium hydrogen peroxymonosulfate and LaFe0.8Cu0.2O3In organic wastewater solution
Concentration be respectively 0.25mmol/L and 0.5g/L, finally reaction flask is placed in shaking table, revolving speed 180rpm, temperature is room
Temperature, time 90min.
It (2) is only that potassium hydrogen peroxymonosulfate dosage is adjusted to finally in organic wastewater when adding potassium hydrogen peroxymonosulfate
Concentration is 0.75mmol/L in solution, and other conditions are the same as (1).
It (3) is only that potassium hydrogen peroxymonosulfate dosage is adjusted to finally in organic wastewater when adding potassium hydrogen peroxymonosulfate
Concentration is 1mmol/L in solution, and other conditions are the same as (1).
Test result shows to work as LaFe0.8Cu0.2O3When dosage is 0.5g/L, with the increasing of hydrogen peroxymonosulfate potassium concn
Add, the degradation rate of Atrazine is increasing.But when concentration of the potassium hydrogen peroxymonosulfate in organic wastewater solution is smaller, due to
Amount is inadequate, so Atrazine may remove not exclusively.
Embodiment 4: LaFe is utilized0.8Cu0.2O3Material activate potassium hydrogen peroxymonosulfate under acid, neutral and alkaline condition Ah
The removal rate of Te Lajin
(1) LaFe is utilized0.8Cu0.2O3Material activates the heterogeneous reaction of potassium hydrogen peroxymonosulfate, using conical flask as anti-
Device is answered, waste water reaction volume is 200mL, and treatment conditions are that the initial concentration of waste water containing Atrazine is 5.0mg/L, before reaction starts
Potassium hydrogen peroxymonosulfate is added into reaction flask to be made its concentration 0.5mmol/L and wastewater pH is adjusted to 2.0, while into reaction flask
Add LaFe0.8Cu0.2O3Material makes its reaction density 0.5g/L, and reaction flask is placed in shaking table, revolving speed 180rpm, temperature
Degree is room temperature, time 90min.
It (2) is only to be adjusted to pH value of waste water after adding potassium hydrogen peroxymonosulfate in the test that reaction waste pH is 4.0
4.0, the same reaction system of other conditions (1).
It (3) is only to be adjusted to pH value of waste water after adding potassium hydrogen peroxymonosulfate in the test that reaction waste pH is 7.0
7.0, the same reaction system of other conditions (1).
It (4) is only to be adjusted to pH value of waste water after adding potassium hydrogen peroxymonosulfate in the test that reaction waste pH is 8.0
8.0, the same reaction system of other conditions (1).
It (5) is only to be adjusted to pH value of waste water after adding potassium hydrogen peroxymonosulfate in the test that reaction waste pH is 10.0
10.0, the same reaction system of other conditions (1).
It is prepared LaFe under the conditions of different initial pH shown in Fig. 40.8Cu0.2O3Material activates persulfate to Aunar
Draw the degradation of saliva.
Test result shows LaFe0.8Cu0.2O3Material activates potassium hydrogen peroxymonosulfate method for oxidation in acid, neutral, alkalinity
Under the conditions of can to Atrazine have extraordinary degradation effect, save investment cost, ensure that the high-level oxidation technology
High efficiency.And the degradation rate of Atrazine reaches 99% or more in 90min under the conditions of different pH.
Embodiment 5:LaFe0.8Cu0.2O3Reuse test
(1) potassium hydrogen peroxymonosulfate is added into 5mg/L Atrazine waste water, then is added into waste water solution
LaFe0.8Cu0.2O3Material, so that potassium hydrogen peroxymonosulfate and LaFe0.8Cu0.2O3Concentration of the material in waste water solution is respectively
0.5mmol/L and 0.5g/L.Finally reaction flask is placed in shaking table, revolving speed 180rpm, temperature is room temperature, time 90min.
(2) after primary degradation, LaFe is collected by centrifugal filtration0.8Cu0.2O3, then cleaned with ethyl alcohol and distilled water
It 3 times, is then dried in vacuo, prepares next Degrading experiment, be repeated 3 times.
Test result shows LaFe0.8Cu0.2O3As catalyst by 3 times circulation after, although degradation rate under
Drop, but basic 100% degradation Atrazine is remained in 90min.Illustrate LaFe0.8Cu0.2O3Effect is recycled as catalyst
Fruit is good, high catalytic efficiency, can favorably recycle in practical application.
Embodiment 6
In order to verify LaFe0.8Cu0.2O3Activation potassium hydrogen peroxymonosulfate can degrade Some Organic Pollutants, then with methyl orange
It is that target contaminant carries out Degrading experiment with rhodamine B
(1) potassium hydrogen peroxymonosulfate is added into the Methyl Orange in Wastewater of 100mg/L and rhodamine B respectively to obtain waste water molten
Liquid.
(2) LaFe is added into waste water solution again0.8Cu0.2O3Material and potassium hydrogen peroxymonosulfate make its concentration to be respectively
0.5g/L and 0.5mmol/L.
(3) finally reaction flask is put into shaking table and is stirred, revolving speed 180rpm, temperature is room temperature, is contaminated after twenty minutes
The degradation and decolorization rate of material all reaches 100%.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (10)
1. a kind of LaFe1-xCuxO3The method for handling residue in water Atrazine:
It is added into organic wastewater after peroxy-monosulfate mixes and adds LaFe1-xCuxO3Material is stirred as heterogeneous catalysis
It mixes, degrades to atrazine-contaminated object；Concentration of the peroxy-monosulfate in organic wastewater is 0.25-1 mM/ls.
2. according to the method described in claim 1, wherein, concentration of the peroxy-monosulfate in Atrazine residual waste water is
0.25-1 mM/ls.
3. according to the method described in claim 1, wherein, the LaFe1-xCuxO3Mass concentration in organic wastewater is
0.25-1.5 grams per liter.
4. according to the method described in claim 1, wherein, LaFe1-xCuxO3After remaining wastewater treatment to Atrazine, it is recycled
In LaFe1-xCuxO3, degradation treatment is carried out to Atrazine waste water as catalyst again.
5. according to the method described in claim 1, wherein, after peroxy-monosulfate is added in organic wastewater, adjusting gained pollutant
The pH value of aqueous solution is 2.0-10.0, then adds LaFe1-xCuxO3。
6. according to claim 1, method described in 2 or 5, wherein the peroxy-monosulfate is potassium hydrogen peroxymonosulfate and crosses a sulphur
One or more of sour hydrogen sodium.
7. according to the method described in claim 1, wherein, the LaFe1-xCuxO3Material is reunion shape nano particle, under
The method of stating obtains:
Step 1: weighing La (NO respectively3)3·6H2O、Fe(NO3)3·9H2O、Cu(NO3)2·3H2O and C6H8O7·H2O adds water-soluble
Solution, and stirred under condition of water bath heating, obtain wet gel；Wherein La (NO3)3·6H2O、Fe(NO3)3·9H2O、Cu
(NO3)2·3H2O and C6H8O7·H2The molar ratio of O is 1:(1-x): x:6, x=0.1,0.2,0.3,0.4,0.5 in formula；
Step 2: wet gel in vacuum oven in drying；
Step 3: being calcined after 350-450 DEG C of pre-burning then at 650-700 DEG C, obtain target product.
8. according to the method described in claim 7, wherein, amount of water is so that metal ion total concentration is not higher than 0.02mol/L.
9. method according to claim 1 or claim 7, wherein LaFe1-xCuxO3The specific surface area of material is 13.8-18.8m2/
G, average grain diameter 15-38nm, average pore size 14.3-18.2nm.
10. according to the method described in claim 7, wherein, the bath temperature of step 1 is 85-95 DEG C；The drying temperature of step 2
It is 95-120 DEG C.
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