CN101704598A - Method for degrading polychlorinated biphenyl in water body by irradiation - Google Patents
Method for degrading polychlorinated biphenyl in water body by irradiation Download PDFInfo
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- CN101704598A CN101704598A CN200910198211A CN200910198211A CN101704598A CN 101704598 A CN101704598 A CN 101704598A CN 200910198211 A CN200910198211 A CN 200910198211A CN 200910198211 A CN200910198211 A CN 200910198211A CN 101704598 A CN101704598 A CN 101704598A
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Abstract
The invention relates to a method for degrading polychlorinated biphenyl in a water body by irradiation, and belongs to the technical field of wastewater treatment. The method mainly comprises the steps of: adjusting the pH value of a water body containing a polychlorinated biphenyl solution at certain concentration, and placing the water body under an electron beam generated by a conventional and commonly used electron accelerator for irradiation treatment, wherein the energy of the electron beam is between 1.6 and 2.0Mev, the current of the electron beam is between 1.0 and 1.2mA, the irradiation dose rate is 0.35KGy/S, the irradiation dose strength is between 10 and 30KGy, and the pH value of the water body is 10; and the degradation rate of the treated polychlorinated biphenyl is between 78 and 99.86 percent.
Description
Technical field
The present invention relates to a kind of method of utilizing polychlorobiphenyl in the irradiation-induced degradation water body, belong to technical field of waste water processing.
Background technology
Along with persistence organic pollutant ((POPs) and staying quality poison material (PTS) the input more concerns of countries in the world to entering the difficult degradation in the environment, the new technology of developing a kind of toxic organic compound of degrading just becomes more and more urgent, is exactly to produce under these circumstances radiation application in the processing of this type of material.
The gamma-rays that radiates during the radioactive atom decay has great penetrating force, and industrial modal irradiation source is radionuclide 60Co and 137Cs, is used for the processing of water and mud.And the controllability of high-power electron beam is good, and speed of reaction is fast, and penetration power is strong, has realized industrial applications at home and abroad.There are some researches show that high-power electron beam and gamma-rays there is no remarkable difference to the effect of compound in the water body.High-power electron beam and gamma-rays can both produce the similar activity intermediate, and major different is that the gamma-ray dosage release rate in cobalt source is relatively low.The research that utilizes radiotechnology that waste water is handled has been carried out the long period abroad, studies show that gamma-rays and electron beam to containing the waste water of heavy metal, and phenolic wastewater, cyanide wastewater, industry contain anthracene, the quinone waste water from dyestuff all has the good treatment effect.Relevant report is less both at home and abroad at present to be applied to the processing of water body for gamma-rays and electron beam irradiation.
It is basic identical that high-power electron beam and gamma-rays enter the reaction that water body takes place, after high-power electron beam or gamma-rays enter water body, 10
-7With water molecules following reaction taking place in second generates various active substances:
H
2O＝＞e
aq -(2.6)+H·(0.55)+OH·(2.7)+H
2(0.45)+H
2O
2(0.71)+H
3O
+(2.6)
During the energy of the every absorption of the numeral in bracket 100eV, the quantity of the various free radicals that produce in the water.
Irradiation is exactly that the moment and the water molecule reaction that utilize high-energy electron or gamma-rays to enter water body produce active free radical e
Aq -, OH, H etc. handle waste water.These free radicals e
Aq -, OH, H are the high reactivity materials, can be rapidly with water body in organism react, thereby reach the organic purpose of Degradation and Transformation.Because the e that reaction produces
Aq -Suitable substantially with OH quantity, also can be reductive action so the removal of pollutent can be an oxygenizement, this depends primarily on concentration, chemical structure and the condition of water quality of pollutent.OH is a typical oxidizing agents, its standard oxidation also original position up to 2.80V, be only second to fluorine (2.87V), it is the present known the strongest oxygenant that can in water treatment, use, it is as the intermediate product of reaction, can bring out the chain reaction of back, and in OH and the water most organic reaction velocity constants all 10
8～10
10M
-1S
-1Order of magnitude scope mainly is addition and proposes H-H reaction with the organism reaction.Addition mainly is and the organism that contains unsaturated link(age), as contains the organism of ethylene linkage and aromatic ring.Proposing H-H reaction mainly is and saturated fatty compounds of group and the reaction of many unsaturated compounds, as aldehydes and ketone organism.
Summary of the invention
The purpose of this invention is to provide a kind of degrade method of polychlorobiphenyl in the water body of irradiance method of utilizing, a kind of energy-efficient wastewater processing technology also promptly is provided.
A kind of method of utilizing polychlorobiphenyl in the irradiation-induced degradation water body of the present invention is characterized in that having following process and step:
A. take the water body that contains finite concentration polychlorobiphenyl solution, regulate its pH value, it is positioned under the electron beam that tradition rumbatron commonly used produces carries out radiation treatment; Perhaps adopting source of radiation is that the gamma-rays that radionuclide 60Co or 137Cs radiate is handled the water body that contains polychlorobiphenyl; During irradiation, the energy of electron beam is 1.6～2.0Mev, and electronic beam current is 1.0～1.2mA, and radiation dose rate is 0.35KGy/S, and irradiation dose intensity is 10～30KGy; The pH value of water body is 10; The degradation rate of handling the final polychlorobiphenyl in back is 78～99.86%; When carrying out radiation treatment, can feed inert nitrogen gas, participate in reaction to prevent other materials, guarantee actual polychlorobiphenyl degradation effect.
Described electron beam irradiation, the energy of its electron beam is only to be 1.8Mev, and the electron beam flow is only to be 1.0mA, and irradiation dose intensity is only to be 30KGy; The pH value of described water body is optimum to be pH=10.
Characteristics of the present invention and advantage:
At present carried out big quantity research both at home and abroad, but also do not had special ideal method for the degraded and the debrominate of polychlorobiphenyl.And irradiation is the unique both high equal strong oxidizer and technology of strong reductant of being close to of generation concentration in aqueous systems simultaneously.
Compare with other traditional treatment method, irradiation technique has following advantage: the standard oxidation of the free radical OH that produces in the reaction also original position up to 2.80V, be only second to fluorine (2.87V), be the present known the strongest oxygenant that can in water treatment, use, and in OH and the water most organic reaction velocity constants all 10
8～10
10M
-1S
-1Order of magnitude scope; It can bring out the chain reaction of back as the intermediate product of reaction; OH does not have selectively direct and the pollutants in waste water reaction is degraded to carbonic acid gas, water and mineral salt with it, can not produce secondary pollution; Because it is a kind of physical chemical process, be easy to be controlled, handle needs to satisfy, even can degrade 10
-9M
-1S
-1The pollutent of level; It both can be used as individual curing, can be complementary with other treating processes again, to reduce cost, satisfied processing requirements; The reaction conditions gentleness is a kind of water technology of high-efficiency and energy-saving type.Can reach clearance more than 99% with the polychlorobiphenyl in the method for the irradiation degraded water body.
Description of drawings
Fig. 1 is electron accelerator irradiation process synoptic diagram among the present invention.
Embodiment
After now specific embodiments of the invention being described in.
Referring to Fig. 1, Fig. 1 is the irradiation process synoptic diagram of rumbatron used in the embodiment of the invention.
Here, embodiment in fact also is the test example.
Embodiment 1
Starting point concentration is the PCB solution of 5ppm, and the beam energy during irradiation is 1.8MeV, and line is 1.0mA, and radiation dose rate is 0.35kGy/s.Irradiation intensity is 10kGy, and degradation rate is 78%.
Embodiment 2
Starting point concentration is the PCB solution of 5ppm, and the beam energy during irradiation is 1.8MeV, and line is 1.0mA, and radiation dose rate is 0.35kGy/s.Irradiation intensity is 30kGy, and degradation rate is 98.5%.
Embodiment 3
Starting point concentration is the PCB solution of 5ppm, feeds nitrogen, and the beam energy during irradiation is 1.8MeV, and line is 1.0mA, and radiation dose rate is 0.35kGy/s.Irradiation intensity is 10kGy, and degradation rate is 85%.
Embodiment 4
Starting point concentration is the PCB solution of 5ppm, feeds nitrogen, and the beam energy during irradiation is 1.8MeV, and line is 1.0mA, and radiation dose rate is 0.35kGy/s.Irradiation intensity is 30kGy, and degradation rate is 99.86%.
The PCB solution of indication is polychlorobiphenyl solution in the foregoing description.
Embodiment 5
Condition is constant identical with the foregoing description 2, and different is that employing irradiation source intensity is 500, and the 000Ci60Co ray carries out irradiation, and the result shows that its degradation effect is constant substantially.(Ci is Curie, is radioactive activity unit)
Claims (2)
1. method of utilizing polychlorobiphenyl in the irradiation-induced degradation water body is characterized in that having following process and step:
A. take the water body that contains finite concentration polychlorobiphenyl solution, regulate its pH value, it is positioned under the electron beam that tradition rumbatron commonly used produces carries out radiation treatment; Perhaps adopting source of radiation is that the gamma-rays that radionuclide 60Co or 137Cs radiate is handled the water body that contains polychlorobiphenyl; During irradiation, the energy of electron beam is 1.6～2.0Mev, and electronic beam current is 1.0～1.2mA, and radiation dose rate is 0.35KGy/S, and irradiation dose intensity is 10～30KGy; The pH value of water body is 10; The degradation rate of handling the final polychlorobiphenyl in back is 78～99.86%; When carrying out radiation treatment, can feed inert nitrogen gas, participate in reaction to prevent other materials, guarantee actual polychlorobiphenyl degradation effect.
2. a kind of method of utilizing polychlorobiphenyl in the irradiation-induced degradation water body as claimed in claim 1, it is characterized in that described electron beam irradiation, the energy of its electron beam is only to be 1.8Mev, and the electron beam flow is only to be 1.0mA, and irradiation dose intensity is only to be 30KGy; The pH value of described water body is optimum to be pH=10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910198211A CN101704598A (en) | 2009-11-03 | 2009-11-03 | Method for degrading polychlorinated biphenyl in water body by irradiation |
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|---|---|---|---|
| CN200910198211A CN101704598A (en) | 2009-11-03 | 2009-11-03 | Method for degrading polychlorinated biphenyl in water body by irradiation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730789A (en) * | 2012-07-16 | 2012-10-17 | 中国科学院高能物理研究所 | Method for degrading tetrabromobisphenol A in water body by irradiation |
| CN103202414A (en) * | 2013-04-12 | 2013-07-17 | 上海大学 | Method and device for irradiation treatment on semi-volatile organic compounds in fish meat by using electron beam |
| CN110467298A (en) * | 2019-08-23 | 2019-11-19 | 杰瑞环保科技有限公司 | A kind of fracturing outlet liquid immediate processing method |
| CN113233539A (en) * | 2021-04-09 | 2021-08-10 | 厦门大学 | Degradation method of high molecular organic compound under electron beam concerted catalysis and application of degradation method in sewage treatment |
-
2009
- 2009-11-03 CN CN200910198211A patent/CN101704598A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730789A (en) * | 2012-07-16 | 2012-10-17 | 中国科学院高能物理研究所 | Method for degrading tetrabromobisphenol A in water body by irradiation |
| CN103202414A (en) * | 2013-04-12 | 2013-07-17 | 上海大学 | Method and device for irradiation treatment on semi-volatile organic compounds in fish meat by using electron beam |
| CN110467298A (en) * | 2019-08-23 | 2019-11-19 | 杰瑞环保科技有限公司 | A kind of fracturing outlet liquid immediate processing method |
| CN113233539A (en) * | 2021-04-09 | 2021-08-10 | 厦门大学 | Degradation method of high molecular organic compound under electron beam concerted catalysis and application of degradation method in sewage treatment |
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Open date: 20100512 |