CN101891296A - Method for treating ozonization water by taking Y-type zeolite loaded with rare earth oxides of cerium oxide (CeO2) and lanthanum oxide (La2O3) as catalyst - Google Patents
Method for treating ozonization water by taking Y-type zeolite loaded with rare earth oxides of cerium oxide (CeO2) and lanthanum oxide (La2O3) as catalyst Download PDFInfo
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- CN101891296A CN101891296A CN 201010229979 CN201010229979A CN101891296A CN 101891296 A CN101891296 A CN 101891296A CN 201010229979 CN201010229979 CN 201010229979 CN 201010229979 A CN201010229979 A CN 201010229979A CN 101891296 A CN101891296 A CN 101891296A
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Abstract
The invention provides a method for treating ozonization water by taking Y-type zeolite loaded with rare earth oxides as a catalyst. The method is characterized by comprising the following steps of: adding the Y-type zeolite (also known as a molecular sieve) which is artificially synthesized and loaded with the rare earth oxides into an ozonization water treatment system; and introducing ozone under the stirring condition to perform ozonization treatment, wherein the surface area is not reduced in the loading process; the BET specific surface area can still reach over 500 m<2>/g<-1> normally; the surface hydroxyl density is increased after the loading process; and the catalysis property can be obtained better.
Description
Technical field
Thereby the present invention proposes a kind of water treatment method that utilizes the y-type zeolite of supported rare earth oxide compound as organic pollutant decontamination in catalyzer, the catalytic ozonation degradation water, belongs to environmental catalysis and water treatment field.
Background technology
The aromatics pollutent is a pollutent common in the trade effluent, is common starting material in the industries such as petrochemical complex, chemistry, pharmacy, has characteristics such as toxicity is big, difficult degradation.Recently, the research about the chemical degradation method of aromatics organic pollutant in the water has caused extensive concern.
Catalytic ozonation has important application prospects as convenient and practical high-level oxidation technology in water treatment.Catalytic ozonation can be divided into homogeneous catalysis and heterogeneous catalyst, and the former is the ion performance katalysis in the solution system, and the latter relies on solid catalyst surface performance katalysis.Compare with homogeneous catalysis, an advantage of heterogeneous catalyst is the secondary pollution of having avoided the dissolved ion to bring, because many metal ions also are that environment is deleterious.In order to improve ozonize efficient, people have developed multiple solid catalyst.Yet from angle of practical application, the heterogeneous catalyst material of efficient stable still is more rare, and the ozonize catalyzer of the active height of exploitation, stable performance is very important for the actual application value that improves catalytic ozonation.
Summary of the invention
Purpose of the present invention provides a kind of novel, stable catalytic material and using method thereof, to improve the practical value of catalytic ozonation.
The y-type zeolite material is the well-known porous material of a class, is widely used as sorbing material or support of the catalyst, yet is not applied in ozonization water treatment.We have proposed Y zeolite to have studied its using method as the ozonize catalytic material, have obtained good effect (Chinese patent, publication number: CN 101585577A).Further finding that the Y zeolite of supported rare earth oxide compound has showed better catalytic performance in catalytic ozonation in the research, so the present invention y-type zeolite with the supported rare earth oxide compound is proposed as organic pollutant in catalyzer, the catalytic ozonation degradation water.
Particular content of the present invention comprises:
(1) a kind of ozonization water treatment method that utilizes the y-type zeolite of supported rare earth oxide compound as catalyzer has been proposed, it is characterized in that the y-type zeolite (claiming molecular sieve again) of synthetic and supported rare earth oxide compound is added in the ozonization water treatment system, agitation condition feeds ozone down, carries out ozonation treatment;
(2) ozonation treatment finishes, by leave standstill, method such as centrifugal, filtration, the y-type zeolite of supported rare earth oxide compound is separated, be used for catalytic process next time;
Above-mentioned ozonation treatment process is carried out under 5-35 ℃ of room temperature condition usually, and the quality relative proportion of adding zeolite and institute's treating water is usually between 0.001-0.05.Used y-type zeolite can be the sodium type, also can be to become Hydrogen through after the ion-exchange; The relative content of sial can be different in the used y-type zeolite structure, can be used as catalytic material behind the supported rare earth oxide compound in the method for the invention.The rare earth oxide of load is meant CeO among the present invention
2And La
2O
3
The y-type zeolite that adopts above-mentioned supported rare earth oxide compound as catalyzer after, under identical ozone input amount situation, the degradation rate of organic pollutant is accelerated to some extent, mineralization degree significantly improves.Concrete raising degree is relevant with the catalyzer relative proportion and the reaction conditions (comprising temperature, stir speed (S.S.), Pollutant levels, ozone input amount, water body pH etc.) of adding.
Compare with existing treatment process, the water treatment method that the present invention proposes has outstanding feature:
(1) y-type zeolite of supported rare earth oxide compound is a polyporous materials, and loading process does not reduce surface-area, and the BET specific surface area still can reach 500m usually
2g
-1More than, particle scale less (micron level) has dispersiveness preferably, and has improved density of surface hydroxyl after the load in water, and this is very crucial for improving catalytic performance.Exactly because advantage like this, in use less input amount can obtain catalytic effect preferably;
(2) y-type zeolite of supported rare earth oxide compound has physical strength preferably, has shown stability preferably under the catalytic ozonation condition, reuses repeatedly, and catalytic effect can access preferably and keep, and this is another key factor for its practical application.
(3) y-type zeolite of supported rare earth oxide compound is very faint to Adsorption phenol in the water, and its katalysis mainly promotes the decomposition of ozone molecule from zeolite surface, so contaminant molecule is very little to its influence, and this also is one of reason of its good stability.
(4) the y-type zeolite material of supported rare earth oxide compound has been realized commercialization at present, and price is relatively cheap, for its practicality provides important guarantee.
Description of drawings
Accompanying drawing 1 is a phenol graphic representation over time among the embodiment 1.
Accompanying drawing 2 is phenol graphic representations over time among the embodiment 2.
Accompanying drawing 3 is phenol graphic representations over time among the embodiment 3.
Accompanying drawing 4 is phenol graphic representations over time among the embodiment 4.
Embodiment
It is example that the present invention contains phenol water with processing, and its catalytic effect and embodiment are described, but scope of the present invention is not limited thereto.
Containing initial phenol concentration at 200ml is 100mg L
-1Simulated wastewater in, add the y-type zeolite 1.0g of supported rare earth oxide compound, start stirring, feed ozone flow 0.47mg min down 20 ℃ of temperature of reaction
-1Ozone, the concentration of phenol under the record different time.The result as shown in Figure 1, the adding that shows zeolite has significantly promoted the degraded of phenol.
Embodiment 2
Containing initial phenol concentration at 200ml is 100mg L
-1Simulated wastewater in, add the y-type zeolite 1.0g of supported rare earth oxide compound, start stirring, feed ozone flow 0.47mg min down 5 ℃ of temperature of reaction
-1Ozone, the concentration of phenol under the record different time.The result as shown in Figure 2, the adding that shows zeolite has significantly promoted the degraded of phenol.
Embodiment 3
Containing initial phenol concentration at 200ml is 100mg L
-1Simulated wastewater in, add the y-type zeolite 1.0g of supported rare earth oxide compound, start stirring, feed ozone flow 0.47mg min down 35 ℃ of temperature of reaction
-1Ozone, the concentration of phenol under the record different time.The result as shown in Figure 3, the adding that shows zeolite has significantly promoted the degraded of phenol.
Embodiment 4
Containing initial phenol concentration at 200ml is 100mg L
-1Simulated wastewater in, add the y-type zeolite 1.0g of supported rare earth oxide compound, start stirring, feed ozone flow 0.47mg min down 20 ℃ of temperature of reaction
-1Ozone 60 minutes, the concentration of record phenol.After reaction finishes, zeolite is leached, dropping into 200ml again, to contain initial phenol concentration be 100mg L
-1Simulated wastewater in, feed ozone flow 047mg min down 20 ℃ of temperature of reaction
-1Ozone 60 minutes, the concentration of record phenol.The result as shown in Figure 4, the adding that shows zeolite has significantly promoted the degraded of phenol, and catalytic activity keeps stability preferably in repeated use.
Claims (2)
1. one kind with supported rare earth oxide compound CeO
2And La
2O
3Y-type zeolite as the ozonization water treatment method of catalyzer, it is characterized in that: in the system of ozonization water treatment, add supported rare earth oxide compound CeO
2And La
2O
3Y-type zeolite as catalyzer, accelerate the oxidative degradation of organic pollutant, ozonation treatment finishes, by leave standstill, method such as centrifugal, filtration, the y-type zeolite of supported rare earth oxide compound is separated, be used for catalytic process next time.
2. according to claim 1 with supported rare earth oxide compound CeO
2And La
2O
3Y-type zeolite as the ozonization water treatment method of catalyzer, the ozonization water treatment process is carried out under 5-35 ℃ room temperature condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010229979 CN101891296A (en) | 2010-07-19 | 2010-07-19 | Method for treating ozonization water by taking Y-type zeolite loaded with rare earth oxides of cerium oxide (CeO2) and lanthanum oxide (La2O3) as catalyst |
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| CN 201010229979 CN101891296A (en) | 2010-07-19 | 2010-07-19 | Method for treating ozonization water by taking Y-type zeolite loaded with rare earth oxides of cerium oxide (CeO2) and lanthanum oxide (La2O3) as catalyst |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491490A (en) * | 2011-12-06 | 2012-06-13 | 江南大学 | Ozonated water treatment method with nano ceria as catalyst |
| CN103962149A (en) * | 2013-09-06 | 2014-08-06 | 张振慧 | Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues |
| CN105381797A (en) * | 2015-10-16 | 2016-03-09 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation of catalytic ozonation supported catalyst used for treating sewage and doped with dual rare earth elements |
| CN105854925A (en) * | 2016-05-04 | 2016-08-17 | 北京高能时代环境技术股份有限公司 | Supported ozone catalyst and preparation and application thereof |
| CN106964333A (en) * | 2017-04-05 | 2017-07-21 | 天津万峰环保科技有限公司 | The method that rare earth loaded catalyst for handling sewage and its preparation method and application and catalytic ozonation handle sewage |
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|---|---|---|---|---|
| CN101259428A (en) * | 2008-04-24 | 2008-09-10 | 福州大学 | Preparation of catalyst for processing industrial wastewater and using method thereof |
| CN101411983A (en) * | 2008-11-27 | 2009-04-22 | 上海交通大学 | Ternary metallic catalyst for catalytic ozonation technology and preparation method thereof |
| CN101585577A (en) * | 2009-07-10 | 2009-11-25 | 江南大学 | Ozonization water treatment method of using Y-type zeolite as catalyst |
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2010
- 2010-07-19 CN CN 201010229979 patent/CN101891296A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101259428A (en) * | 2008-04-24 | 2008-09-10 | 福州大学 | Preparation of catalyst for processing industrial wastewater and using method thereof |
| CN101411983A (en) * | 2008-11-27 | 2009-04-22 | 上海交通大学 | Ternary metallic catalyst for catalytic ozonation technology and preparation method thereof |
| CN101585577A (en) * | 2009-07-10 | 2009-11-25 | 江南大学 | Ozonization water treatment method of using Y-type zeolite as catalyst |
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| 《净水技术》 20091225 王云波等 臭氧-生物沸石处理湘江微污染原水试验研究 1－2 第28卷, 第6期 2 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491490A (en) * | 2011-12-06 | 2012-06-13 | 江南大学 | Ozonated water treatment method with nano ceria as catalyst |
| CN103962149A (en) * | 2013-09-06 | 2014-08-06 | 张振慧 | Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues |
| CN103962149B (en) * | 2013-09-06 | 2016-01-13 | 张振慧 | The heterogeneous ozonation solid catalyst of water treatment prepared by rare earth containing zeolite waste residue |
| CN105381797A (en) * | 2015-10-16 | 2016-03-09 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation of catalytic ozonation supported catalyst used for treating sewage and doped with dual rare earth elements |
| CN105854925A (en) * | 2016-05-04 | 2016-08-17 | 北京高能时代环境技术股份有限公司 | Supported ozone catalyst and preparation and application thereof |
| CN105854925B (en) * | 2016-05-04 | 2018-10-19 | 北京高能时代环境技术股份有限公司 | A kind of support type ozone catalyst and its preparation and application |
| CN106964333A (en) * | 2017-04-05 | 2017-07-21 | 天津万峰环保科技有限公司 | The method that rare earth loaded catalyst for handling sewage and its preparation method and application and catalytic ozonation handle sewage |
| CN106964333B (en) * | 2017-04-05 | 2020-06-26 | 天津万峰环保科技有限公司 | Rare earth supported catalyst for treating sewage, preparation method and application thereof, and method for treating sewage by catalytic oxidation of ozone |
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Application publication date: 20101124 |