CN101536713B - A method for removing residual pesticides in tea leaves - Google Patents
A method for removing residual pesticides in tea leaves Download PDFInfo
- Publication number
- CN101536713B CN101536713B CN2009100386203A CN200910038620A CN101536713B CN 101536713 B CN101536713 B CN 101536713B CN 2009100386203 A CN2009100386203 A CN 2009100386203A CN 200910038620 A CN200910038620 A CN 200910038620A CN 101536713 B CN101536713 B CN 101536713B
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- CN
- China
- Prior art keywords
- tea leaves
- tealeaves
- ozone water
- tea
- residual pesticides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 241001122767 Theaceae Species 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000575 pesticide Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 23
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- 238000007146 photocatalysis Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 239000003905 agrochemical Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 150000008442 polyphenolic compounds Chemical class 0.000 description 5
- 235000013824 polyphenols Nutrition 0.000 description 5
- 239000005949 Malathion Substances 0.000 description 4
- JXSJBGJIGXNWCI-UHFFFAOYSA-N diethyl 2-[(dimethoxyphosphorothioyl)thio]succinate Chemical compound CCOC(=O)CC(SP(=S)(OC)OC)C(=O)OCC JXSJBGJIGXNWCI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229960000453 malathion Drugs 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 239000005946 Cypermethrin Substances 0.000 description 3
- 229960005424 cypermethrin Drugs 0.000 description 3
- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 235000000173 Camellia sinensis var sinensis Nutrition 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 102000030523 Catechol oxidase Human genes 0.000 description 1
- 108010031396 Catechol oxidase Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003986 organophosphate insecticide Substances 0.000 description 1
- 239000003987 organophosphate pesticide Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
本发明公开了一种去除茶叶中残留农药的方法。该方法是通过将采摘后的茶叶采用臭氧水或臭氧水-光催化联合处理去除残留农药。本发明的处理方法可将茶叶上的残留农药大大降低或完全去除，处理步骤简单易行且容易控制，成本低廉，有益于环保，基本不影响茶叶中的有效物质。The invention discloses a method for removing residual pesticides in tea leaves. The method removes residual pesticides by treating the picked tea leaves with ozone water or ozone water-photocatalysis. The treatment method of the invention can greatly reduce or completely remove the residual pesticides on the tea leaves, and the treatment steps are simple and easy to implement and control, the cost is low, it is beneficial to the environment, and the effective substances in the tea leaves are basically not affected.
Description
Technical field
The invention belongs to tea-manufacturing technology, be specifically related to a kind of preprocess method of removing remains of pesticide in the tealeaves.
Background technology
China is second-biggest-in-the-world Tea Production state; But in recent years, China's Tea Production is faced with severe situation, and main problem is that residues of pesticides are quite serious; According to the industrial and commercial reason office in Guangdong Province sampling result in 2006; The tealeaves that sell in 64 big small-sized markets, 7 cities, wholesale market, Sole Proprietorship shop, disqualification rate mainly are because residues of pesticides exceed standard up to more than 50%.In addition, residual the exceeding standard of tealeaves farming becomes the bottleneck of China's tea export, because developed country utilizes technical advantage, formulated more and more stricter tealeaves Pesticide Residue standard, and the regulation of European Union has been increased to 210 by in January, 2006; Residues of pesticides project beyond 210 adopts " default standard " of 0.01mg/kg; Limiting the quantity of of 5a,6,9,9a-hexahydro-6,9-methano-2,4 reduced to 0.01mg/kg from original 30mg/kg especially suddenly; And Japan is increased to 176 with import tealeaves residue detection project by 71 also in " the positive list system " in May, 2006.From 1.6 ten thousand tons of reducing to 2005 year by year of 2.8 ten thousand tons in 2000, the accumulative total range of decrease is up to 42.8% for the tea export amount of China.
Tea Production is separation with the harvesting; Total field planting and processing two big processes of being divided into; Production routine mainly comprises: plantation-dispenser-(safety interval)-harvesting-airing-complete-twist with the fingers rubs-drying etc., the manufacturing procedure after completing maybe be different because of different local tea varieties.
Agricultural chemicals residual comes from the field planting process in early stage, and according to relevant report, China's tealeaves residues of pesticides except from the direct sprinkling, also from indirect acquisition, comprising: the first, from soil, absorb, like BHC; The second, carry by water; The 3rd, the air drift.So the tealeaves that pluck in the field contains the residues of pesticides of being introduced by field operation or environmental pollution unavoidably.These agricultural chemicals are brought into the process segment immediately.
The Tea Processing technology of China was used till today from ancient times always; Usually the tealeaves after plucking is promptly directly processed without any processing; And in today that natural environment has generally worsened, this original technology will cause the pollutant in the environment residual in a large number in tealeaves.
Because agricultural chemicals is stronger in the absorption affinity on tealeaves surface, if will remove the agricultural chemicals on the tealeaves, it is not good to the removal effect of agricultural chemicals to depend merely on the cleaning that is soaked in water, and especially for water-soluble lower agricultural chemicals, removal effect is very limited.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art, the method for remains of pesticide in a kind of effective removal tealeaves is provided.
A kind of method of removing remains of pesticide in the tealeaves, it is to adopt Ozone Water to handle tealeaves.The present invention is through a large amount of experiments, and discovery can be removed residual agricultural chemicals after adopting Ozone Water to handle tealeaves.
As further optimization, can tealeaves be placed Ozone Water-photocatalysis Combined Treatment equipment, adopt Ozone Water and ultraviolet light to the tealeaves Combined Treatment, then can reduce the residues of pesticides of tealeaves greatly.
As further optimization, the weight ratio of tealeaves and Ozone Water is about 1: 9-1: 11, and consistency of ozone water remains on 0.7-0.9mg/L, and ultraviolet source is UV etc., wavelength 254nm, luminous intensity 43uw/cm
2
As further optimization, can around ultraviolet light, be provided with TiO
2Nickel screen as photochemical catalyst to improve degradation efficiency.
As further optimization, when remains of pesticide was merely organic phosphates, wherein Ozone Water was alkaline Ozone Water, and the pH value is between 8～10.
Compared with prior art; The present invention has following beneficial effect: processing method of the present invention can make tealeaves remains of pesticide after being processed as finished product remove fully, and the simple and easy control of treatment step is with low cost; Be of value to environmental protection, do not influence the active principle in the tealeaves basically.
The specific embodiment
Embodiment 1
The fresh tea leaf that will contain the 1.9mg/kg cypermethrin places Ozone Water-photocatalysis Combined Treatment equipment, adds the water that is equivalent to 10 times of weight of fresh tea leaf, feeds ozone gas and makes consistency of ozone water remain on 0.8mg/L; Opening luminous intensity is 43uw/cm
2245nm uviol lamp source, uviol lamp is with quartzy sleeve pipe outward, and TiO is arranged
2Nickel screen be centered around around the uviol lamp; Handle draining after 30 minutes, complete again, knead, other tea making steps such as drying.
Through this preliminary treatment, prepared tealeaves is compared with traditional tea making method, and the cypermethrin persticide residue is become fully by 0.22mg/kg and can't check, thereby has met the regulation of limiting the quantity of of European Union.Tea Polyphenols has only descended 10% than traditional tea making method.
Experiment shows, when the residual quantity near 2.0mg/kg of cypermethrin at fresh tea leaf, soak with clear water that clearance is merely 35% after 30 minutes, and at Ozone Water-same equal time of photocatalysis Combined Treatment, clearance reaches 85%.This is because ultraviolet light can excite the generation of OH when contacting with photochemical catalyst, especially at O
3Under the situation about existing during water, can cause a series of radical reactions, inspire a large amount of OH fast, this OH is degradable organic pollutant effectively.This experimental result shows that OH has good degradation equally to the agricultural chemicals that is adsorbed on the tealeaves surface.
Embodiment 2
The fresh tea leaf that will contain residual 7.8mg/kg malathion places Ozone Water generation equipment; Add the water that is equivalent to 10 times of weight of fresh tea leaf; And the pH value of regulating water is 10; Consistency of ozone water remains on 0.8mg/L, handles to drain after 30 minutes, completes, kneads, other tea making steps such as drying.
Through this preliminary treatment; The residual quantity of malathion is reduced to 0.9mg/kg; And after this preprocess method combination and traditional tea preparation method, prepared tealeaves is compared with traditional tea making method; The malathion persticide residue is become fully by 0.15mg/kg and can't check, and Tea Polyphenols has only descended 10% than traditional tea making method.
Experiment also shows, when remains of pesticide is organophosphorus insecticide, under alkaline Ozone Water individual processing, can reach the effect that slightly is superior to Ozone Water under the alkalescence-photocatalysis Combined Treatment.When the near 8mg/kg of organophosphorus pesticide malathion residual concentration, both clearances are respectively 88% and 82%.
In addition, aspect the influence of tealeaves active principle, ozone-photocatalysis has certain oxidation to some active principle such as Tea Polyphenols in the tealeaves; But because in this process; Ozone-photocatalysis has suppressed the effect of enzyme in the tealeaves simultaneously, has blocked the decomposition of polyphenol oxidase to Tea Polyphenols, therefore; Generally speaking, little to the influence of tealeaves active principle.Experiment shows that frying becomes to sample tea again after the method preliminary treatment, and Tea Polyphenols only reduces by 10%.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100386203A CN101536713B (en) | 2009-04-14 | 2009-04-14 | A method for removing residual pesticides in tea leaves |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100386203A CN101536713B (en) | 2009-04-14 | 2009-04-14 | A method for removing residual pesticides in tea leaves |
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| Publication Number | Publication Date |
|---|---|
| CN101536713A CN101536713A (en) | 2009-09-23 |
| CN101536713B true CN101536713B (en) | 2012-05-09 |
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| CN2009100386203A Expired - Fee Related CN101536713B (en) | 2009-04-14 | 2009-04-14 | A method for removing residual pesticides in tea leaves |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102742682B (en) * | 2012-07-24 | 2014-10-22 | 王志深 | Method for removing residual pesticide on dried tea leaves |
| CN103349111A (en) * | 2013-07-23 | 2013-10-16 | 华南农业大学 | Method for reducing imidacloprid residue in tea drinks |
| CN104174607A (en) * | 2014-08-06 | 2014-12-03 | 镇江市丹徒区茗缘茶叶专业合作社 | Cleaning method for tea leaves |
| CN104206937A (en) * | 2014-08-22 | 2014-12-17 | 中国人民解放军总后勤部军需装备研究所 | Advanced treatment method for pesticide residues on surfaces of fruits and vegetables |
| CN104663933A (en) * | 2015-02-17 | 2015-06-03 | 杭州艺福堂茶业有限公司 | Disposable tea processing technology |
| CN105394519A (en) * | 2015-10-26 | 2016-03-16 | 青海出入境检验检疫局综合技术中心 | Method for ozone assisted ultraviolet degradation of pesticide residues in wolfberry fruits |
| CN107412813A (en) * | 2017-05-03 | 2017-12-01 | 文山学院 | A kind of method that pseudo-ginseng Pesticide Residues are removed using ozone |
| CN107019062A (en) * | 2017-05-17 | 2017-08-08 | 张松波 | The method that tealeaves removes residues of pesticides |
| CN106942572A (en) * | 2017-05-17 | 2017-07-14 | 张松波 | The method for removing pesticide residue from tea |
| CN107258946A (en) * | 2017-07-18 | 2017-10-20 | 广西桂平市蒙圩镇柱强种养专业合作社 | A kind of cleaning method of tealeaves efficient lossless |
| CN108323591A (en) * | 2018-05-15 | 2018-07-27 | 凤冈县秀姑茶业有限公司 | A kind of processing technology of green tea |
| CN109601657A (en) * | 2019-01-24 | 2019-04-12 | 刘景岳 | A kind of tea treatment method removing pesticide residue |
| CN112273465B (en) * | 2020-11-20 | 2022-12-02 | 新昌县群星茶业有限公司 | Flower-fragrance black tea and processing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176491A (en) * | 2006-11-11 | 2008-05-14 | 大闽食品（漳州）有限公司 | Processing method of instant tea powder without pesticide residues |
| CN101180997A (en) * | 2007-12-21 | 2008-05-21 | 朱光 | Technique for making tea |
-
2009
- 2009-04-14 CN CN2009100386203A patent/CN101536713B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101176491A (en) * | 2006-11-11 | 2008-05-14 | 大闽食品（漳州）有限公司 | Processing method of instant tea powder without pesticide residues |
| CN101180997A (en) * | 2007-12-21 | 2008-05-21 | 朱光 | Technique for making tea |
Non-Patent Citations (3)
| Title |
|---|
| 张存政，等.消解去除食用叶菜中高效氯氰菊酯残留方法的研究..《农业环境科学学报》.2004,第24卷(第1期),196-200. * |
| 杨生权,等.果蔬农药残留降解方法研究进展..《安徽农业科学》.2008,第36卷(第6期),2506-2508. * |
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| CN101536713A (en) | 2009-09-23 |
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