CN103601155A - Method for preparing nano calcium peroxide by chemical modification - Google Patents
Method for preparing nano calcium peroxide by chemical modification Download PDFInfo
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- CN103601155A CN103601155A CN201310576080.0A CN201310576080A CN103601155A CN 103601155 A CN103601155 A CN 103601155A CN 201310576080 A CN201310576080 A CN 201310576080A CN 103601155 A CN103601155 A CN 103601155A
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Abstract
The invention relates to a method for preparing nano calcium peroxide by chemical modification. The method comprises the following steps: adding a certain amount of dispersing agent into a prepared calcium salt water solution, and mixing under ultrasonic conditions to prepare a bottom solution; slowly and dropwisely adding oxydol with a certain concentration into the continuously stirred bottom solution, reacting in an ice water bath, and continuing the reaction for 15-20 minutes after the dropwise addition is completed; and centrifugating the mixed solution, repeatedly washing the precipitate with deionized water and isopropanol, and drying in a vacuum drying oven for 12-24 hours to obtain the nano calcium peroxide. The method has the advantages of simple technique, mild reaction conditions and short reaction time; the dispersing agent added in the reaction process is nontoxic and harmless, and thus, no pollutant is generated in the production process; and the prepared product has favorable properties, and the particle size of the nano calcium peroxide is 100nm or so. The invention provides a simple effective new way for preparing nano calcium peroxide.
Description
Technical field
The invention belongs to environmental technology field, relate to the recovery technique of Polluted Groundwater, be specially a kind of preparation method of chemical modification nano level calcium peroxide.
Background technology
The ecological safety that groundwater pollution causes in recent years and the public health problem that threatens has received great concern.Among numerous pollutents, the pollution that petroleum-type component and heavy metal cause is the most important thing of public attention point especially.It is large that these pollutents generally have toxicity, is easy to enrichment in human body, once be difficult to the characteristic of removal in entered environment, therefore more and more becomes the emphasis of research.According to statistics, the crude oil that leak through different approaches every year in the whole world is up to 1,000 ten thousand tons, and all kinds of oily(waste)waters of oil-field development discharge are especially over 3,000 ten thousand tons
[1].In China, various places can be found everywhere especially because deal with the petroleum substance pollution incident causing improperly.Heavy metal contamination is that current environment is repaired the large technical barrier that field faces equally, and the cadmium being discharged in global environment in 50 years in the past according to statistics reaches 2.2 * 10
4ton, copper 9.39 * 10
5ton, plumbous 7.83 * 10
5ton, zinc 1.35 * 10
6ton.By 2006; the annual contaminated by heavy metals grain of China is up to 1,200 ten thousand tons; Environmental Protection Department is for the soil harmful heavy metal sampling monitoring result demonstration of 300,000 hectares of Basic Farmland Conservation Zones of China, and China has 3.6 ten thousand hectares of basic farmland heavy metal-polluted soils to exceed standard, and exceeding standard rate is up to 12.1%
[2].
Groundwater pollution reparation is mainly divided into showering technology and based technique for in-situ remediation according to the difference of repair mode, showering technology because of its quantities large, processing costs is relatively high, site environment is destroyed to the factor such as large larger restriction in Practical Project.Based technique for in-situ remediation processing costs is relatively low, little to on-the-spot water and soil disturbance, has larger application space in actual repair engineering.Especially most with prospects with permeable reactive barrier technology (PRB) and in situ chemical oxidation (ISCO) in based technique for in-situ remediation.ISCO is incorporated into chemical oxidizing agent underground, by redoxomorphism, removes the pollutent in soil and groundwater, have relatively inexpensive, the characteristic such as treatment cycle is short, processing efficiency height.At present, use more oxygenant to comprise permanganate, persulphate, hydrogen peroxide, calcium peroxide.Permanganate is relatively long the action time in underground water is repaired, but due to long its oxidation capacity of its transformation period relatively all the other several oxygenants a little less than.Persulphate because of its oxidisability be also by force the focus of Recent study, but in actual repair application, it easily produces secondary products and pollutes.Hydrogen peroxide be ISCO the most frequently used be also that actual repair engineering is applied maximum oxygenants, but more and more study and repair case and show that the action time of hydrogen peroxide is shorter, and range of application is narrow, its efficient action pH scope, below 3, is easily disproportionated into oxygen ineffective under high pH condition.Research in recent years shows that calcium peroxide is more effective hydrogen peroxide (H during a kind of pollution is repaired
2o
2) source, the water-soluble generation of calcium peroxide H
2o
2and Ca (OH)
2, its output is up to 0.47 g H
2o
2/ g CaO
2therefore, CaO
2be also referred to as " solid-state H
2o
2".
Calcium peroxide is a kind of environmental friendliness shaped material that has oxygen release and oxidisability concurrently, is not only widely used in agricultural planting, aquaculture, and food and medical industry, be also used in surrounding medium reparation in recent years.CaO
2as H
2o
2the advantage of source of supply is, H
2o
2output can be by regulating CaO
2solubleness control, CaO
2solubleness can control by the pH of regulator solution again, therefore at CaO
2repair system in can directly by the pH condition of regulation system, control H
2o
2output, be a kind of desirable ISCO oxidation material.CaO
2as a kind of environmentally friendly oxygenant, in oxidize contaminants, can not bring adverse influence to surrounding environment, on the contrary, in repair process, it can produce oxygen, and promotes microbial growth in surrounding medium, and then improves biological restoration efficiency.But traditional calcium peroxide particle size is large in actual repair application, be easy to reunite, be applied to the character such as the easy blocking pipe of underground water reparation and limited its popularity in underground water reparation application.To CaO
2carry out nano modification and can reduce traditional C aO
2particle diameter, improve CaO
2specific surface area, thus optimize traditional C aO
2performance.The relatively traditional calcium peroxide particle size of nano level calcium peroxide is little, good dispersity, and contact site increases with pollutent, reaction rate accelerates, thus its efficiency in application can be improved greatly, can further reduce consumption.
[1] road jade-like stone. the biodegradation research of shallow groundwater system petroleum-type pollutent. Jilin University, 2013.
[2] Jiang Wei. heavy metal contaminants is Transport and recovery technique research in red soil. the Central China University of Science and Technology, 2012.
Summary of the invention
Large to overcome traditional calcium peroxide particle size, be easy to the afunction of reuniting, in actual repair application, the technical barrier of easy blocking pipe, the object of the present invention is to provide a kind of chemical modification to prepare the method for nano level calcium peroxide, thereby optimizes the performance of traditional calcium peroxide.The method preparation is simple, and cost is low, is easy to realize suitability for industrialized production, prepares gained calcium peroxide particle diameter less, has good dispersiveness, has a extensive future.
A kind of chemical modification that the present invention proposes is prepared the method for nano level calcium peroxide, and concrete steps are as follows:
Calcium salt is dissolved in deionized water, is made into solution or the suspension liquid of calcium salt, in this solution or suspension liquid, add dispersion agent, through room temperature, ultrasonic and mechanical stirring 30～50min, fully mixes above-mentioned substance, forms liquid at the bottom of inorganic-polymer reaction; Speed by hydrogen peroxide with 20mL/h～30mL/h drops in liquid of the described end, and reaction is carried out below at 15 ℃, and continuous uniform stirring; Be added dropwise to complete rear continuation reaction 15～20min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle; The precipitation forming, through centrifugal, is washed, and suction filtration is dry, obtains nano level calcium peroxide powder; Wherein: the mass ratio of dispersion agent and calcium salt is at 1:25～1:6.25; Calcium salt is 1:5～1:8 with the ratio of the mole number of hydrogen peroxide.
In the present invention, described calcium salt is selected from muriate, oxyhydroxide, nitrate or the vitriol of calcium any.
In the present invention, the massfraction of described solution or suspension liquid is 5%～10%.
In the present invention, the dispersion agent adding be in polyvinyl alcohol or sodium polyacrylate any.
In the present invention, the molecular-weight average of the polyvinyl alcohol of dispersion agent is 1700～1800, and the molecular-weight average of sodium polyacrylate is 5 * 10
6～7 * 10
6.
In the present invention, centrifugal condition is the centrifugal 5～8min of 8000rmp; Suction filtration filter membrane used aperture is 0.45 μ m.
In the present invention, the condition of washing is for using deionized water, washed with isopropyl alcohol; Dry condition is vacuum-drying 12 ~ 24h at 30～40 ℃.
The present invention be take polyvinyl alcohol as dispersion agent carries out modification to the calcium peroxide in building-up process, can obtain the nano level calcium peroxide particle of good dispersion property.
Beneficial effect of the present invention:
1, cost of the present invention is low, and technological operation is simple, and required production unit is cheap and easy to get, is easy to realize suitability for industrialized production.
2, the nano level calcium peroxide particle that the present invention prepares is less, H
2o
2reserves are abundant, can be used as H
2o
2donor, for underground water reparation, passes through H simultaneously
2o
2disproportionation can produce oxygen, as oxygen release agent, for repairing medium, provide oxygen, improve biological restoration efficiency, practical.
3, the nano level calcium peroxide that the present invention prepares can be used as oxygenant for repaired by the underground water of Organic pollutants, and because its particle diameter is less, specific surface area is large and pollutant reaction site is many, can effectively improve organic pollutant degradation efficiency; Can be used as equally sorbent material for repaired by the underground water of heavy metal contamination, its larger specific surface area can increase adsorption site, effectively improves the adsorption efficiency of heavy metal ion, in underground water reparation application, has wide prospect.
Accompanying drawing explanation
Fig. 1 is the X ray diffracting spectrum of synthesized nano level calcium peroxide.
Fig. 2 is the scanning electron microscope (SEM) photograph of synthesized nano level calcium peroxide.
Fig. 3 is the scanning electron microscope (SEM) photograph of non-modified calcium peroxide.
Fig. 4 is the transmission electron microscope picture of synthesized nano level calcium peroxide.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
(1) accurately take 6g calcium hydroxide, be dissolved in 120mL deionized water, stir and be made into the suspension liquid of calcium hydroxide.Take 0.96g(and be calcium hydroxide massfraction 16%) polyvinyl alcohol adds in this suspension liquid, ultrasonic and mechanical stirring 50min, fully mixes above-mentioned substance at ambient temperature, forms liquid at the bottom of inorganic-polymer reaction.
(2) hydrogen peroxide of 63.46mL30% adds in 100mL head space bottle, with the sealing of gland device, inserts the controlled drop-burette of flow velocity and drops at a slow speed in end liquid, and reaction is carried out under cold condition, and continuous uniform stirring.Be added dropwise to complete rear continuation reaction 15min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle.
(3) precipitation forming is through centrifugal, and with deionized water, washed with isopropyl alcohol product, after decompress filter, product is dried under vacuum condition to 24h and obtains nano level calcium peroxide powder.
The red spectral line of Fig. 1 is the X-ray diffractogram of the present embodiment gained nano level calcium peroxide, can find out and belong to CaO
2characteristic peak 2 θ=30.1,35.6,47.3, prove and synthesized nano level calcium peroxide.Through specific surface area detector, measure synthesized calcium peroxide specific surface area at 44m
2/ g left and right.Fig. 2 is the scanning electron microscope (SEM) photograph of nano level calcium peroxide, can clearly distinguish the monomer particle of calcium peroxide from Fig. 2 (a) and (b) figure, compares calcium peroxide in Fig. 3, the dispersed obviously raising of nano level calcium peroxide after modification.Fig. 4 is the transmission electron microscope picture of nano level calcium peroxide, and synthesized calcium peroxide particle diameter is in 100nm left and right as seen from the figure.
Embodiment 2
(1) accurately take 6g calcium hydroxide, be dissolved in 120mL deionized water, stir and be made into the suspension liquid of calcium hydroxide.Take 0.48g(and be calcium hydroxide massfraction 8%) polyvinyl alcohol adds in this suspension liquid, ultrasonic and mechanical stirring 30min, fully mixes above-mentioned substance at ambient temperature, forms liquid at the bottom of inorganic-polymer reaction.
(2) hydrogen peroxide of 63.46mL30% adds in 100mL head space bottle, with the sealing of gland device, inserts the controlled drop-burette of flow velocity and drops at a slow speed in end liquid, and reaction is carried out under cold condition, and continuous uniform stirring.Be added dropwise to complete rear continuation reaction 20min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle.
(3) precipitation forming is through centrifugal, and with deionized water, washed with isopropyl alcohol product, after decompress filter, product is dried under vacuum condition to 12h and obtains nano level calcium peroxide powder.
Synthesized sample carries out X-ray diffractometer sign, can detect and belong to CaO
2characteristic peak 2 θ=30.1,35.6,47.3, prove and synthesized nano level calcium peroxide.Through specific surface area detector, measure synthesized calcium peroxide specific surface area at 39m
2/ g left and right.
Embodiment 3
(1) accurately take 6g calcium hydroxide, be dissolved in 120mL deionized water, stir and be made into the suspension liquid of calcium hydroxide.Take 0.24g(and be calcium hydroxide massfraction 4%) sodium polyacrylate adds in this suspension liquid, ultrasonic and mechanical stirring 50min, fully mixes above-mentioned substance at ambient temperature, forms liquid at the bottom of inorganic-polymer reaction.
(2) hydrogen peroxide of 63.46mL30% adds in 100mL head space bottle, with the sealing of gland device, inserts the controlled drop-burette of flow velocity and drops at a slow speed in end liquid, and reaction is carried out under cold condition, and continuous uniform stirring.Be added dropwise to complete rear continuation reaction 15min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle.
(3) precipitation forming is through centrifugal, and with deionized water, washed with isopropyl alcohol product, after decompress filter, product is dried under vacuum condition to 24h and obtains nano level calcium peroxide powder.
Fig. 1 black spectral line is the X-ray diffractogram of the present embodiment gained nano level calcium peroxide, can find out and belong to CaO
2characteristic peak 2 θ=30.1,35.6,47.3, prove and synthesized nano level calcium peroxide.Through specific surface area detector, measure synthesized calcium peroxide specific surface area at 43m
2/ g left and right.
Embodiment 4
(1) accurately take 6g calcium hydroxide, be dissolved in 120mL deionized water, stir and be made into the suspension liquid of calcium hydroxide.Take 0.48g(and be calcium hydroxide massfraction 8%) sodium polyacrylate adds in this suspension liquid, ultrasonic and mechanical stirring 50min, fully mixes above-mentioned substance at ambient temperature, forms liquid at the bottom of inorganic-polymer reaction.
(2) hydrogen peroxide of 63.46mL30% adds in 100mL head space bottle, with the sealing of gland device, inserts the controlled drop-burette of flow velocity and drops at a slow speed in end liquid, and reaction is carried out under cold condition, and continuous uniform stirring.Be added dropwise to complete rear continuation reaction 15min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle.
(3) precipitation forming is through centrifugal, and with deionized water, washed with isopropyl alcohol product, after decompress filter, product is dried under vacuum condition to 24h and obtains nano level calcium peroxide powder.
Synthesized sample carries out X-ray diffractometer sign, can detect and belong to CaO
2characteristic peak 2 θ=30.1,35.6,47.3, prove and synthesized nano level calcium peroxide.Through specific surface area detector, measure synthesized calcium peroxide specific surface area at 35m
2/ g left and right.
Claims (7)
1. chemical modification is prepared a method for nano level calcium peroxide, it is characterized in that concrete steps are as follows:
Calcium salt is dissolved in deionized water, is made into solution or the suspension liquid of calcium salt, in this solution or suspension liquid, add dispersion agent, through room temperature, ultrasonic and mechanical stirring 30～50min, fully mixes above-mentioned substance, forms liquid at the bottom of inorganic-polymer reaction; Speed by hydrogen peroxide with 20mL/h～30mL/h drops in liquid of the described end, and reaction is carried out below at 15 ℃, and continuous uniform stirring; Be added dropwise to complete rear continuation reaction 15～20min, calcium salt is fully reacted with hydrogen peroxide, form stable nano level calcium peroxide particle; The precipitation forming, through centrifugal, is washed, and suction filtration is dry, obtains nano level calcium peroxide powder; Wherein: the mass ratio of dispersion agent and calcium salt is at 1:25～1:6.25; Calcium salt is 1:5～1:8 with the ratio of the mole number of hydrogen peroxide.
2. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, it is characterized in that described calcium salt is selected from the muriate of calcium, oxyhydroxide, nitrate or vitriol any.
3. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, it is characterized in that the massfraction of described solution or suspension liquid is 5%～10%.
4. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, it is characterized in that the dispersion agent adding be in polyvinyl alcohol or sodium polyacrylate any.
5. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, and the molecular-weight average that it is characterized in that the polyvinyl alcohol of dispersion agent is 1700～1800, and the molecular-weight average of sodium polyacrylate is 5 * 10
6～7 * 10
6.
6. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, it is characterized in that centrifugal condition is the centrifugal 5～8min of 8000rmp; Suction filtration filter membrane used aperture is 0.45 μ m.
7. a kind of chemical modification according to claim 1 is prepared the method for nano level calcium peroxide, it is characterized in that the condition of washing is for using deionized water, washed with isopropyl alcohol; Dry condition is vacuum-drying 12 ~ 24h at 30～40 ℃.
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Cited By (9)
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|---|---|---|---|---|
| CN103964395A (en) * | 2014-04-29 | 2014-08-06 | 同济大学 | Modification method for nano calcium peroxide with controllable particle size |
| CN108865153A (en) * | 2018-04-19 | 2018-11-23 | 济南大学 | A kind of calper calcium peroxide capsule of nano soil-repairing agent and its preparation method and application |
| CN109261117A (en) * | 2018-08-08 | 2019-01-25 | 河南工程学院 | A kind of preparation method loading spherical nanometer calcium salt oxidizing agent based on rectorite |
| CN109896722A (en) * | 2019-04-12 | 2019-06-18 | 河南工程学院 | A kind of spherical nanometer calper calcium peroxide preparation method for deeply dehydrating sludge |
| CN110127781A (en) * | 2019-04-29 | 2019-08-16 | 南京神克隆科技有限公司 | A kind of modified graphene oxide composite material, preparation method and application |
| CN112062100A (en) * | 2020-04-27 | 2020-12-11 | 同济大学 | Nano calcium peroxide, preparation method and application |
| CN113198546A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Quantum dot/peroxide composite material, preparation method and application thereof |
| CN114085677A (en) * | 2021-12-02 | 2022-02-25 | 南京大学环境规划设计研究院集团股份公司 | Preparation method and application of heavy metal passivation complexing agent |
| CN115317514A (en) * | 2022-07-07 | 2022-11-11 | 重庆医科大学 | PAA-CaO 2 NPs nano-spray and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976386A (en) * | 2012-12-05 | 2013-03-20 | 同济大学 | Preparation method of nano-scale calcium peroxide for removing toluene in water body |
| CN103253636A (en) * | 2013-05-15 | 2013-08-21 | 同济大学 | Preparation method of high-purity nanometre calcium peroxide |
-
2013
- 2013-11-18 CN CN201310576080.0A patent/CN103601155A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976386A (en) * | 2012-12-05 | 2013-03-20 | 同济大学 | Preparation method of nano-scale calcium peroxide for removing toluene in water body |
| CN103253636A (en) * | 2013-05-15 | 2013-08-21 | 同济大学 | Preparation method of high-purity nanometre calcium peroxide |
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| CN103964395B (en) * | 2014-04-29 | 2016-06-15 | 同济大学 | A kind of nanometer calper calcium peroxide method of modifying of size tunable |
| CN103964395A (en) * | 2014-04-29 | 2014-08-06 | 同济大学 | Modification method for nano calcium peroxide with controllable particle size |
| CN108865153A (en) * | 2018-04-19 | 2018-11-23 | 济南大学 | A kind of calper calcium peroxide capsule of nano soil-repairing agent and its preparation method and application |
| CN108865153B (en) * | 2018-04-19 | 2021-05-18 | 济南大学 | Calcium peroxide nano microcapsule soil remediation agent and preparation method and application thereof |
| CN109261117A (en) * | 2018-08-08 | 2019-01-25 | 河南工程学院 | A kind of preparation method loading spherical nanometer calcium salt oxidizing agent based on rectorite |
| CN109261117B (en) * | 2018-08-08 | 2021-06-22 | 河南工程学院 | Preparation method of rectorite-based spherical nano calcium salt loaded oxidant |
| CN109896722A (en) * | 2019-04-12 | 2019-06-18 | 河南工程学院 | A kind of spherical nanometer calper calcium peroxide preparation method for deeply dehydrating sludge |
| CN110127781B (en) * | 2019-04-29 | 2022-05-10 | 南京神克隆科技有限公司 | Modified graphene oxide composite material, preparation method and application |
| CN110127781A (en) * | 2019-04-29 | 2019-08-16 | 南京神克隆科技有限公司 | A kind of modified graphene oxide composite material, preparation method and application |
| CN112062100A (en) * | 2020-04-27 | 2020-12-11 | 同济大学 | Nano calcium peroxide, preparation method and application |
| CN113198546A (en) * | 2021-04-27 | 2021-08-03 | 华中科技大学 | Quantum dot/peroxide composite material, preparation method and application thereof |
| CN114085677A (en) * | 2021-12-02 | 2022-02-25 | 南京大学环境规划设计研究院集团股份公司 | Preparation method and application of heavy metal passivation complexing agent |
| CN115317514A (en) * | 2022-07-07 | 2022-11-11 | 重庆医科大学 | PAA-CaO 2 NPs nano-spray and preparation method and application thereof |
| CN115317514B (en) * | 2022-07-07 | 2023-05-30 | 重庆医科大学 | PAA-CaO 2 NPs nano spray and preparation method and application thereof |
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Application publication date: 20140226 |