CN102786113A - Method of <60>Co gamma-ray irradiation for degrading three bactericides of carbendazim, probenazole and thiophanate methyl - Google Patents
Method of <60>Co gamma-ray irradiation for degrading three bactericides of carbendazim, probenazole and thiophanate methyl Download PDFInfo
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- CN102786113A CN102786113A CN2012102988933A CN201210298893A CN102786113A CN 102786113 A CN102786113 A CN 102786113A CN 2012102988933 A CN2012102988933 A CN 2012102988933A CN 201210298893 A CN201210298893 A CN 201210298893A CN 102786113 A CN102786113 A CN 102786113A
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- thiophanate methyl
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- derosal
- ray irradiation
- thiabendazole
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Abstract
The invention relates to a method of <60>Co gamma-ray irradiation for degrading three bactericides of carbendazim, probenazole and thiophanate methyl. The method comprises the steps of: firstly, filling 1ppm of ozone into water with the carbendazim, probenazole and thiophanate methyl, generating a chemical reaction by <60>Co gamma-ray irradiation, generating .OH with strong oxidability, hydrated electron eaq- with strong reducibility, and .H free radical, wherein the free radicals .OH and aromatic compounds in the carbendazim, probenazole and thiophanate methyl or an unsaturated group are subjected to addition reaction to result in degrading of the three bactericides. The adsorbed dose of the <60>Co gamma-ray irradiation is 5-10kGy, and the pH value is more than 10. By adopting the combined processing technology of the <60>Co gamma-ray irradiation and the ozone, aqueous solution degradation effects on the three bactericides of the carbendazim, probenazole and thiophanate methyl are remarkable, and the larger the adsorbed dose is, the higher the degradation rate of the drug is.
Description
Technical field
The present invention relates to the method for a kind of irradiation-induced degradation derosal, thiabendazole and thiophanate methyl.
Background technology
In China's agriculture prodn, agricultural chemicals has been brought into play huge effect.Derosal, thiabendazole and thiophanate methyl are the important kinds of benzimidazoles agricultural chemicals, are the systemic fungicides of efficient, low toxicity and wide spectrum.This series bactericidal agent is widely used in production, storage and the preservation process after the crops gathers in the crops preceding and results, but it is at soil, still has a certain amount of residual in water and the crop.This type agricultural chemicals is degraded slower in physical environment, and people, animal are had certain toxic side effect [1].The detection method of this type agricultural chemicals of report mainly is HPLC, vapor-phase chromatography, liquid chromatography-mass spectrography logotype method [2,3] at present, and wherein liquid phase chromatography is to use more general a kind of method.Because the boiling point of benzimidazoles agricultural chemicals is generally higher, pyrolysis and the degradation method that some are commonly used thereof are lower to the degradation efficiency of this type of agricultural chemicals.
And irradiation is to the influence of derosal, thiabendazole and three kinds of sterilant degradation effects of the thiophanate methyl research that also do not appear in the newspapers at present, the invention provides a kind of efficient, method of irradiation-induced degradation derosal, thiabendazole and thiophanate methyl fast.
Summary of the invention
The objective of the invention is to above-mentioned present situation, aim to provide a kind of high energy efficiency, degrade derosal, thiabendazole and thiophanate methyl fast
60Co gamma-ray irradiation be used to the to degrade method of derosal, thiabendazole and three kinds of sterilant of thiophanate methyl.
The implementation of the object of the invention does,
60Co gamma-ray irradiation be used to the to degrade method of derosal, thiabendazole and three kinds of sterilant of thiophanate methyl,
60The residual water that derosal, thiabendazole and thiophanate methyl are arranged of Co gamma-ray irradiation; Produce chemical reaction through irradiation; Generate extremely strong extremely strong hydrated electron eaq-, the H radical of OH, reductibility of oxidisability; Aromatics in these radicals OH and derosal, thiabendazole and the thiophanate methyl or unsaturated group generation addition reaction cause three kinds of sterilant degradeds, charge into the ozone of 1ppm in the aqueous solution of derosal, thiabendazole and thiophanate methyl earlier; Form the residual ozone water solution that derosal, thiabendazole and thiophanate methyl are arranged, use again
60The Co gamma-ray irradiation,
60Co gamma-ray irradiation absorption dose is 5-10kGy.
The present invention adopts and passes through
60The treatment technology of Co gamma-ray irradiation and ozone coupling is handled the residual water that derosal, thiabendazole and thiophanate methyl are arranged; Produce chemical reaction through irradiation; Generate extremely strong extremely strong hydrated electron eaq-, the H radical of OH, reductibility of oxidisability; Aromatics in these radicals OH and derosal, thiabendazole and the thiophanate methyl or unsaturated group generation addition reaction cause three kinds of sterilant to be degraded fast.
Description of drawings
Fig. 1 is the influence figure of irradiation absorption dose to three kinds of sterilant aqueous solution degradation effects,
Fig. 2 adds the influence figure of ozone to three kinds of sterilant aqueous solution degradation effects,
Fig. 3 is the influence figures of different pH values to the derosal degradation rate,
Fig. 4 is the influence figures of different pH values to the thiabendazole degradation rate,
Fig. 5 is the influence figures of different pH values to the thiophanate methyl degradation rate.
Embodiment
The present invention uses the irradiation absorption dose as 5-10kGy's
60The residual ozone water solution that derosal, thiabendazole and three kinds of sterilant of thiophanate methyl are arranged of Co gamma-ray irradiation is degraded three kinds of sterilant fast.
For the degradation effect that works out, the applicant has done following test.
The applicant has done the degradation effect test of irradiation absorption dose to the ozone water solution of three kinds of sterilant.
The ozone water solution degradation effect of three kinds of sterilant is seen Fig. 1.As can beappreciated from fig. 1 along with the increase of irradiation absorption dose, the degradation rate of derosal, thiabendazole and thiophanate methyl increases gradually; When the irradiation absorption dose reached 5.2KGy, thiabendazole was degraded fully, compared with the degradation effect of derosal, and thiabendazole is degraded, and required irradiation absorption dose is lower, degradation efficiency is higher; The thiophanate methyl warp
60Co gamma-ray irradiation rear section is converted into derosal; Wherein along with the increase of irradiation absorption dose, thiophanate methyl degraded and the efficient that is converted into derosal increase gradually, when the irradiation absorption dose is 10.4KGy; Thiophanate methyl is degraded fully, and the amount of derosal also tends towards stability.So the present invention selects
60Co gamma-ray irradiation absorption dose is 5-10kGy.
60The high more reason of the high more degradation efficiency of Co gamma-ray irradiation absorption dose is; The irradiation absorption dose is high more just can to produce the more freedom base; And the aromatics in initiation more freedom base participation and derosal, thiabendazole and the thiophanate methyl or the addition reaction of unsaturated group; Make DeR more thorough, so degradation rate is high more.
The applicant has done to add the influence test of ozone to degradation rate, and test-results is seen Fig. 2.
After as can beappreciated from fig. 2 pouring the ozone of 1ppm in the aqueous solution, under identical irradiation absorption dose, the degradation rate of derosal, thiabendazole and thiophanate methyl significantly increases; Reach the identical required irradiation absorption dose of degradation efficiency and also obviously descend, when the irradiation absorption dose reached 5.2KGy, the degradation rate of derosal was up to 89%, and when the irradiation absorption dose reached 10.4KGy, derosal was degraded fully; When the irradiation absorption dose reached 2.6KGy, thiabendazole was promptly by degraded fully; When the irradiation absorption dose reached 1.3KGy, thiophanate methyl was promptly by degraded fully; Explain that ozonize associating irradiation-induced degradation has the obvious synergistic effect; This mainly is because in the presence of ozone; The eaq-of irradiation water generates, H radical also can be converted into the OH radical rapidly, and this decomposition in water of ozone also will produce the OH radical, and these have all improved the concentration of OH radical greatly; Thereby improve the utilising efficiency of radiolysis, obviously improved organic degradation efficiency.
The applicant has done the influence test of solution acid-basicity to degradation rate.The applicant has compared pH and has been 2, pH is 10 and the not degradation effect test of aqueous solution during adjust pH, and test-results sees Fig. 3,4,5.Visible from Fig. 3,4,5, different pH environment is influential to the degraded of derosal, and sour environment has restraining effect to the degraded of derosal, and that pH is the degradation effect of 10 o'clock derosal is best; The pH environment is little to the degradation effect influence of thiabendazole, and when the irradiation absorption dose was 5.2KGy, the thiabendazole aqueous solution of different pH values was all almost by degraded fully; PH is the degraded that 10 alkaline environment helps thiophanate methyl, and when the irradiation absorption dose was 1.3KGy, promptly by degraded fully, the sour environment degradation effect was the poorest for thiophanate methyl.So the present invention is residual to have the pH value of the ozone water solution of derosal, thiabendazole and thiophanate methyl to be chosen in more than 10.
Claims (2)
1.
60Co gamma-ray irradiation be used to the to degrade method of derosal, thiabendazole and three kinds of sterilant of thiophanate methyl,
60The residual water that derosal, thiabendazole and thiophanate methyl are arranged of Co gamma-ray irradiation; Produce chemical reaction through irradiation; Generate extremely strong extremely strong hydrated electron eaq-, the H radical of OH, reductibility of oxidisability; Aromatics in these radicals OH and derosal, thiabendazole and the thiophanate methyl or unsaturated group generation addition reaction cause the degraded of three kinds of sterilant, it is characterized in that charging into earlier in the aqueous solution of derosal, thiabendazole and thiophanate methyl the ozone of 1ppm; Form the residual ozone water solution that derosal, thiabendazole and thiophanate methyl are arranged, use again
60The Co gamma-ray irradiation,
60Co gamma-ray irradiation absorption dose is 5-10kGy.
2. according to claim 1
60Co gamma-ray irradiation be used to the to degrade method of derosal, thiabendazole and three kinds of sterilant of thiophanate methyl, the pH value that it is characterized in that the residual ozone water solution that derosal, thiabendazole and thiophanate methyl arranged is more than 10.
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| CN2012102988933A CN102786113A (en) | 2012-08-21 | 2012-08-21 | Method of <60>Co gamma-ray irradiation for degrading three bactericides of carbendazim, probenazole and thiophanate methyl |
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| CN2012102988933A CN102786113A (en) | 2012-08-21 | 2012-08-21 | Method of <60>Co gamma-ray irradiation for degrading three bactericides of carbendazim, probenazole and thiophanate methyl |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435206A (en) * | 2013-08-15 | 2013-12-11 | 清华大学 | Organic wastewater ozonation and ionizing radiation synergetic treatment method and treatment system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0781728A1 (en) * | 1995-12-27 | 1997-07-02 | Framatome | Method and device for treating an aqueous effluent comprising an organic filler |
| CN101362619A (en) * | 2008-09-26 | 2009-02-11 | 清华大学 | Method for removing cyanide in waster water by ionizing radiation and ozone oxidization |
| CN101746872A (en) * | 2009-10-23 | 2010-06-23 | 湖北省农业科学院农产品加工与核农技术研究所 | 60Cogamma-ray irradiation for degrading five fish drugs of chloramphenicol, sulphadimidine, terramycin, oxolinic acid and furazolidone |
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2012
- 2012-08-21 CN CN2012102988933A patent/CN102786113A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0781728A1 (en) * | 1995-12-27 | 1997-07-02 | Framatome | Method and device for treating an aqueous effluent comprising an organic filler |
| CN101362619A (en) * | 2008-09-26 | 2009-02-11 | 清华大学 | Method for removing cyanide in waster water by ionizing radiation and ozone oxidization |
| CN101746872A (en) * | 2009-10-23 | 2010-06-23 | 湖北省农业科学院农产品加工与核农技术研究所 | 60Cogamma-ray irradiation for degrading five fish drugs of chloramphenicol, sulphadimidine, terramycin, oxolinic acid and furazolidone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435206A (en) * | 2013-08-15 | 2013-12-11 | 清华大学 | Organic wastewater ozonation and ionizing radiation synergetic treatment method and treatment system |
| CN103435206B (en) * | 2013-08-15 | 2015-07-15 | 清华大学 | Organic wastewater ozonation and ionizing radiation synergetic treatment method and treatment system |
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Application publication date: 20121121 |