CN101503230A - Nano material recycling-free efficient water treatment process - Google Patents
Nano material recycling-free efficient water treatment process Download PDFInfo
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- CN101503230A CN101503230A CNA200810020528XA CN200810020528A CN101503230A CN 101503230 A CN101503230 A CN 101503230A CN A200810020528X A CNA200810020528X A CN A200810020528XA CN 200810020528 A CN200810020528 A CN 200810020528A CN 101503230 A CN101503230 A CN 101503230A
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Abstract
The invention discloses a nanophase material recovery-free high-effective water processing method. The method is as follows: nano-sized photocatalysis material and micron loaded particles are compounded; nano composite material is uniformly loaded by special adhesive on rotary vanes of a device which treats sewage and wastewater by high-effective photocatalysis; photocatalytic degradation is carried out on the sewage and wastewater by the device which treats sewage and wastewater by high-effective photocatalysis. The method does not need to recycle photocatalytic nano material, can avoid the investment of additional equipment and technique owing to the recycle of the nano material, can avoid problems such as secondary pollution and the like caused by immature technique, enormous equipment investment and incomplete recovery being faced owing to the recovery of the nano material in the water treatment, namely, can avoid the second pollution of water quality, soil and interrelated organism caused by the incomplete recovery of the nano material, can better reduce agglomeration of the nano-sized photocatalysis material and obviously increases the photocatalytic degradation efficiency.
Description
Technical field
The invention belongs to and utilize nano material that industrial sewage, daily waste water are carried out the technology of purifying treatment, particularly a kind of nano material recycling-free efficient water treatment process with high efficiency photocatalysis effect.
Background technology
It is one of nano material applied research field the earliest that the catalytic performance of utilization nano material efficient is handled waste water, general at present the employing directly is distributed to nano-powder in the waste water, utilize the photocatalysis of powder granule to make the objectionable constituent in the waste water be decomposed into innoxious substance, reach the purpose of administering waste water.After water treatment finishes, adopt membrane filtration to collect usually to wherein photocatalysis nano material and reclaim or discharge with water.But, more and more studies show that, nano particle is discharged water quality, soil and the relevant very big potential safety hazard of organism existence with water.And the use of film has further increased the cost of wastewater treatment, and this technology is still immature, or does not have the filtering membrane of aperture less than nano material, or its treatment capacity is very little.In breadboard research, generally adopt ultracentrifugal method to make nano material separate the back with the aqueous solution and reclaim, but this can't implement in the processing of a large amount of trade effluents or daily sewage at all.
This employing directly adds the usual manner of handling in the waste water with nano-powder and has various disadvantages: (1) nano material directly is distributed in the waste water, reunites easily between particle, and the effect of nano material can't be given full play to, and photocatalysis efficiency is low; (2) the trickle very difficult recovery of nano-grain in order to reclaim expensive nano material, must drop into substantial contribution and set up recovery system, the cost height, and still do not have at present and improve or sophisticated recovery technology; (3) some is left over and irretrievable nano material causes new pollution to water quality easily.
Summary of the invention
The object of the present invention is to provide a kind of nano material recycling-free efficient water treatment process; realize that nano-photocatalyst material recycles for a long time; avoid improving the photocatalytic degradation efficient of nano-photocatalyst material simultaneously to pollutent in waste water or the sewage because of nano particle reclaims not exclusively water quality, secondary pollution that soil and related organisms caused.
The technical solution that realizes the object of the invention is: a kind of nano material recycling-free efficient water treatment process, and step is as follows:
The first step, the high efficiency photocatalysis nano material that will have a low transition of electron energy level and a micron loaded particle are carried out compound, and nano material is compound in micron particle surface or the surperficial shallow bore hole, and forming apparent particle size is micron-sized nano-photo catalytic matrix material;
Second step, select tackiness agent, with nano composite material spray equably, appendix in high efficiency photocatalysis dispose of sewage, in the device of waste water on the rotating paddle of overpickling;
In the 3rd step, solidification treatment is toasted the rotating paddle that is coated with the nano-photo catalytic matrix material at a certain temperature, makes tackiness agent that certain curing reaction take place, and guarantees the stability of nano composite material appendix;
In the 4th step, utilize that high efficiency photocatalysis is disposed of sewage, the device of waste water carries out photocatalysis treatment to waste water.
The present invention compared with prior art, its remarkable advantage is: (1) does not need photocatalysis nano material is reclaimed, and can avoid carrying out the extra equipment and the input of technology because of reclaiming nano material; (2) can avoid in the water treatment that the technology that recovery faced because of nano material is immature, equipment drops into huge and reclaim the incomplete secondary pollution problems that causes, can avoid reclaiming not exclusively water quality, secondary pollution that soil and related organisms caused because of nano material; (3) can reduce the agglomeration of nano-photocatalyst material well, significantly improve its photocatalytic degradation efficient (20%～70%); (4) can be widely used in the processing of various industrial sewages and daily waste water, have good application prospects.
Embodiment
Nano material recycling-free efficient water treatment process of the present invention, step is as follows:
The first step, the high efficiency photocatalysis nano material that will have a low transition of electron energy level and a micron loaded particle are carried out compound, and nano material is compound in micron particle surface or the surperficial shallow bore hole, and forming apparent particle size is micron-sized nano-photo catalytic matrix material; Photocatalysis nano material can be TiO
2, SiO
2, ZnO or Cr
2O
3, or through the nano-photocatalyst material after the doping of 0.5%～5% transition metal or rare earth metal.The micron loaded particle can be 50～100 μ m diatomite powders or 100～200 μ m macroporous silica gels, or the micron-sized porous inorganic particulate of other adsorptivities.In matrix material, the mass percent of the nano material after nano-photocatalyst material or the doping is 5%～10%.
Second step, select tackiness agent, with nano composite material spray equably, appendix in high efficiency photocatalysis dispose of sewage, in the device of waste water on the rotating paddle of overpickling; Tackiness agent is service water glass or the silicate adhesive through 1～10 times of dilution.Silicate adhesive consists of: contain 75～85 parts of the aqueous solution of water glass 35%～45%, 2～10 parts in urea, 0.5～3 part of sugar, 0.1～1 part of sodium dichromate 99,1～4 part in sal epsom, 0～8 part of carclazyte, 100 parts in water.To the acid that high efficiency photocatalysis is disposed of sewage, rotating paddle pickling in the device of waste water is adopted is 5% hydrochloric acid or 5% dilute sulphuric acid.
In the 3rd step, solidification treatment is toasted the rotating paddle that is coated with the nano-photo catalytic matrix material at a certain temperature, makes tackiness agent that certain curing reaction take place, and guarantees the stability of nano composite material appendix; The nano-photo catalytic matrix material is sprayed on the rotating paddle, and adopting with the air compressor is the spray gun of power, and nozzle diameter: φ 0.5mm～φ 1.3mm, compressor air pressure are 0.2MPa～0.8MPa.The nano-photo catalytic matrix material is disposed of sewage at high efficiency photocatalysis, the quantity for spray on the device rotating paddle of waste water is 50～150g/m
2The thermal treatment that is coated with the rotating paddle of nano-photo catalytic matrix material is to be begun by room temperature, is that 0.1 ℃/min is warmed up to 70 ℃ with temperature rise rate, and keeps 20～24h.
In the 4th step, utilize that high efficiency photocatalysis is disposed of sewage, the device of waste water carries out photocatalysis treatment to waste water.
Embodiment 1
10g photocatalytic nanometer titanium dioxide is scattered in the 1000m1 dehydrated alcohol, adds 0.5% silane coupling agent, ultrasonic dispersing 5min; Add 50～100 μ m diatomite particle 190g of 70 ℃ of dry 24h, stirring reaction 30min; Filter 70 ℃ of dry 2h; Promptly get nano titanium oxide and the diatomaceous composite powder of micron.
With high efficiency photocatalysis dispose of sewage, rotating paddle in the device [patent No. 200620126044.X] of waste water is cleared up, and is the dilute hydrochloric acid cleaning with 5% then, washes 2 times 70 ℃ of dry 2h again with deionized water; Take out behind the 1min in the sodium silicate solution that then high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water is dipped in 5 times of dilutions, utilize the spray gun of 0.6MPa pressurized air and φ 0.8mm nozzle to spray the nano composite material powder immediately on aforementioned blade, quantity for spray is controlled to be 100g/m
2At last high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water behind 70 ℃ of dry 24h (temperature rise rate that begins by room temperature be 0.1 ℃/min) install with high efficiency photocatalysis dispose of sewage, on the device of the device of waste water.
Dispose of sewage at high efficiency photocatalysis, add 100mg/L methyl orange solution 1000ml in the tank in the device of waste water, starter motor, adjusting the blade speed of rotation is 20 commentaries on classics/min; To wastewater treatment 3h, tropeolin-D content is 4.3mg/L in the test water; Get 100ml and handle back solution, (12000 change/min) centrifugal 10min, find no any type of particulate matter or throw out at a high speed in the centrifuge tube bottom.The employing spectrophotometry detects, and directly drops in the waste water with photocatalytic nanometer titanium dioxide and compares, and the degradation efficiency of tropeolin-D improves 40%.
Embodiment 2
5g photocatalytic nanometer titanium dioxide is scattered in the 500ml dehydrated alcohol, adds 0.5% stearic acid, ultrasonic dispersing 5min; Add 100～200 μ m macroporous silica gel particles 95g of 70 ℃ of dry 24h, stirring reaction 30min; Filter 70 ℃ of dry 2h; Promptly get the composite powder of nano titanium oxide and micron macroporous silica gel.
With high efficiency photocatalysis dispose of sewage, rotating paddle in the device of waste water is cleared up, and is the dilute hydrochloric acid cleaning with 5% then, washes 2 times 70 ℃ of dry 2h again with deionized water; Take out behind the 1min in the sodium silicate solution that then high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water is dipped in 5 times of dilutions, utilize the spray gun of 0.4MPa pressurized air and φ 0.5mm nozzle to spray the nano composite material powder immediately on aforementioned blade, quantity for spray is controlled to be 100g/m
2At last high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water behind 70 ℃ of dry 24h (temperature rise rate that begins by room temperature be 0.1 ℃/min) install with high efficiency photocatalysis dispose of sewage, on the device of the device of waste water.
Dispose of sewage at high efficiency photocatalysis, add the blue solution 2000ml of 200mg/L methyl in the tank in the device of waste water, starter motor, adjusting the blade speed of rotation is 10 commentaries on classics/min; To wastewater treatment 3h, the blue content of methyl is 10.8mg/L in the test water; Get 100ml and handle back solution, (12000 change/min) centrifugal 10min, find no any type of particulate matter or throw out at a high speed in the centrifuge tube bottom.The employing spectrophotometry detects, and directly drops in the waste water with photocatalytic nanometer titanium dioxide and compares, and the degradation efficiency of methyl orchid improves 23%.
Embodiment 3
With 10g photocatalytic nanometer Cr
2O
3Be scattered in the 1000ml dehydrated alcohol, add 0.5% stearic acid, ultrasonic dispersing 5min; Add 100～200 μ m macroporous silica gel particles 190g of 70 ℃ of dry 24h, stirring reaction 30min; Filter 70 ℃ of dry 2h; Promptly get nanometer Cr
2O
3Composite powder with the micron macroporous silica gel.
With high efficiency photocatalysis dispose of sewage, rotating paddle in the device of waste water is cleared up, and is the dilute hydrochloric acid cleaning with 5% then, washes 2 times 70 ℃ of dry 2h again with deionized water; Then high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water is dipped in the silicate adhesive and takes out behind the 1min, utilize the spray gun of 0.6MPa pressurized air and φ 0.8mm nozzle to spray the nano composite material powder immediately on aforementioned blade, quantity for spray is controlled to be 100g/m
2At last high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water behind 70 ℃ of dry 24h (temperature rise rate that begins by room temperature be 0.1 ℃/min) be installed on that high efficiency photocatalysis is disposed of sewage, on the device of the device of waste water.Silicate adhesive consists of: contain 75～85 parts of the aqueous solution of water glass 35%～45%, and 2～10 parts in urea, 0.5～3 part of sugar, 0.1～1 part of sodium dichromate 99,1～4 part in sal epsom, 0～8 part of carclazyte, 100 parts in water, above-mentioned part is massfraction.
Dispose of sewage at high efficiency photocatalysis, add the blue solution 2000ml of 200mg/L methyl in the tank in the device of waste water, starter motor, adjusting the blade speed of rotation is 10 commentaries on classics/min; To wastewater treatment 3h, the blue content of methyl is 10.2mg/L in the test water; Get 100ml and handle back solution, (12000 change/min) centrifugal 10min, find no any type of particulate matter or throw out at a high speed in the centrifuge tube bottom.The employing spectrophotometry detects, with photocatalytic nanometer Cr
2O
3Directly drop in the waste water and compare, the degradation efficiency of methyl orchid improves 35%.
Embodiment 4
The photocatalytic nanometer titanium dioxide that 10g is doped with 2% ferro element is scattered in the 1000ml dehydrated alcohol, adds 0.5% silane coupling agent, ultrasonic dispersing 5min; Add 50～100 μ m diatomite particle 190g of 70 ℃ of dry 24h, stirring reaction 30min; Filter 70 ℃ of dry 2h; Promptly get doped nano titanium dioxide and the diatomaceous composite powder of micron.
With high efficiency photocatalysis dispose of sewage, rotating paddle in the device of waste water carries out the foreign material cleaning, is the dilute hydrochloric acid cleaning with 5% then, washes 2 times 70 ℃ of dry 2h again with deionized water; Then high efficiency photocatalysis is disposed of sewage, the device rotating paddle of waste water is dipped in the silicate adhesive and takes out behind the 1min, utilize the spray gun of 0.4MPa pressurized air and φ 0.5mm nozzle to spray the nano composite material powder immediately on aforementioned blade, quantity for spray is controlled to be 100g/m
2At last high efficiency photocatalysis is disposed of sewage, in the device of waste water rotating paddle behind 70 ℃ of dry 24h (temperature rise rate that begins by room temperature be 0.1 ℃/min) be installed on that high efficiency photocatalysis is disposed of sewage, on the device of the device of waste water.Silicate adhesive consists of: contain 75～85 parts of the aqueous solution of water glass 35%～45%, 2～10 parts in urea, 0.5～3 part of sugar, 0.1～1 part of sodium dichromate 99,1～4 part in sal epsom, 0～8 part of carclazyte, 100 parts in water.
Dispose of sewage at high efficiency photocatalysis, add 100mg/L methyl orange solution 1000ml in the tank in the device of waste water, starter motor, adjusting the blade speed of rotation is 10 commentaries on classics/min; To wastewater treatment 3h, tropeolin-D content is 3.5mg/L in the test water; Get 100ml and handle back solution, (12000 change/min) centrifugal 10min, find no any type of particulate matter or throw out at a high speed in the centrifuge tube bottom.The employing spectrophotometry detects, and directly drops in the waste water with adulterated nano titanium oxide and compares, and the degradation efficiency of tropeolin-D improves 70%.
Claims (10)
1, a kind of nano material recycling-free efficient water treatment process, step is as follows:
The first step, the high efficiency photocatalysis nano material that will have a low transition of electron energy level and a micron loaded particle are carried out compound, and nano material is compound in micron particle surface or the surperficial shallow bore hole, and forming apparent particle size is micron-sized nano-photo catalytic matrix material;
Second step, select tackiness agent, with nano composite material spray equably, appendix in high efficiency photocatalysis dispose of sewage, in the device of waste water on the rotating paddle of overpickling;
In the 3rd step, solidification treatment is toasted the rotating paddle that is coated with the nano-photo catalytic matrix material at a certain temperature, makes tackiness agent that certain curing reaction take place, and guarantees the stability of nano composite material appendix;
In the 4th step, utilize that high efficiency photocatalysis is disposed of sewage, the device of waste water carries out photocatalysis treatment to waste water.
2, nano material recycling-free efficient water treatment process according to claim 1 is characterized in that: photocatalysis nano material is TiO
2, SiO
2, ZnO or Cr
2O
3, or through the nano-photocatalyst material after the doping of 0.5%～5% transition metal or rare earth metal.
3, nano material recycling-free efficient water treatment process according to claim 1 is characterized in that: the micron loaded particle is 50～100 μ m diatomite powders or 100～200 μ m macroporous silica gels, or the micron-sized porous inorganic particulate of other adsorptivities.
4, according to claim 1,2 or 3 described nano material recycling-free efficient water treatment process, it is characterized in that: in matrix material, the mass percent of the nano material after nano-photocatalyst material or the doping is 5%～10%.
5, nano material recycling-free efficient water treatment process according to claim 1 is characterized in that: tackiness agent is service water glass or the silicate adhesive through 1～10 times of dilution.
6, nano material recycling-free efficient water treatment process according to claim 5, it is characterized in that: the silicate adhesive of employing consists of: 75～85 parts of the aqueous solution that contain water glass 35%～45%, 2～10 parts in urea, 0.5～3 part of sugar, 0.1～1 part of sodium dichromate 99,1～4 part in sal epsom, 0～8 part of carclazyte, 100 parts in water.
7, nano material recycling-free efficient water treatment process according to claim 1, it is characterized in that: the nano-photo catalytic matrix material is sprayed on the rotating paddle, employing is the spray gun of power with the air compressor, nozzle diameter: φ 0.5mm～φ 1.3mm, compressor air pressure are 0.2MPa～0.8MPa.
8, according to claim 1 or 7 described nano material recycling-free efficient water treatment process, it is characterized in that: the nano-photo catalytic matrix material is disposed of sewage at high efficiency photocatalysis, the quantity for spray on the device rotating paddle of waste water is 50～150g/m
2
9, according to claim 1 or 7 described nano material recycling-free efficient water treatment process, it is characterized in that: the thermal treatment that is coated with the rotating paddle of nano-photo catalytic matrix material is to be begun by room temperature, with temperature rise rate is that 0.1 ℃/min is warmed up to 70 ℃, and keeps 20～24h.
10, according to claim 1 or 7 described nano material recycling-free efficient water treatment process, it is characterized in that: to the acid that high efficiency photocatalysis is disposed of sewage, rotating paddle pickling in the device of waste water is adopted is 5% hydrochloric acid or 5% dilute sulphuric acid.
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| CNA200810020528XA CN101503230A (en) | 2008-02-04 | 2008-02-04 | Nano material recycling-free efficient water treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140769A (en) * | 2014-08-06 | 2014-11-12 | 苏州卓越工程塑料有限公司 | Hot melt adhesive for bubble cap packaging |
| CN104437503A (en) * | 2014-11-15 | 2015-03-25 | 桂林理工大学 | Visible-light response photocatalyst Li2Cu2Si4O11 and preparation method thereof |
| CN104520405A (en) * | 2012-06-07 | 2015-04-15 | 利兹大学 | Method of inhibiting scale in geological formation |
-
2008
- 2008-02-04 CN CNA200810020528XA patent/CN101503230A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104520405A (en) * | 2012-06-07 | 2015-04-15 | 利兹大学 | Method of inhibiting scale in geological formation |
| US9890623B2 (en) | 2012-06-07 | 2018-02-13 | University Of Leeds | Method of inhibiting scale in a geological formation |
| CN104140769A (en) * | 2014-08-06 | 2014-11-12 | 苏州卓越工程塑料有限公司 | Hot melt adhesive for bubble cap packaging |
| CN104140769B (en) * | 2014-08-06 | 2016-05-11 | 苏州卓越工程塑料有限公司 | A kind of blister package PUR |
| CN104437503A (en) * | 2014-11-15 | 2015-03-25 | 桂林理工大学 | Visible-light response photocatalyst Li2Cu2Si4O11 and preparation method thereof |
| CN104437503B (en) * | 2014-11-15 | 2016-09-28 | 桂林理工大学 | Visible light-responded photocatalyst Li2cu2si4o11and preparation method thereof |
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Open date: 20090812 |