Device and method for degradating organic pollutant in tea by photo chermistry

Abstract

An apparatus for photochemically degradating the organic pollutants in tea is composed of a reacting container with tea inlet and outlet, blowing inlet, oxygen inlet, atomizing nozzle and exhaust port, and an ultraviolet light source consisting of light-source tubes. Its method is also disclosed.

Description

Technical field [0001] The invention belongs to the applied research field of photochemistry and environmental photochemistry, in particular to a device and method for photochemically degrading organic pollutants in tea Background technique [0002] Before the 1970s, in order to increase tea production and prevent tea plant diseases and insect pests, people used highly toxic, long-acting, and refractory organochlorine pesticides frequently and on a large scale, resulting in serious pollution of the soil and water environments. From the 1970s Since then, after the state banned the use of organochlorine pesticides, people began to spray organophosphorus pesticides, pyrethroids, organosulfur pesticides and other insecticides. Although some pesticides are less toxic, tea trees must eventually pass through plant physiological processes. The biochemical action transfers the pesticides in the soil and water to the tea leaves, so that the pesticides remain in the tea leaves. When m...

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Problems solved by technology

[0002] Before the 1970s, in order to increase tea production and prevent tea plant diseases and insect pests, people used highly toxic, long-acting, and refractory organochlorine pesticides frequently and on a large scale, resulting in serious pollution of the soil and water environments. From the 1970s Since then, after the state banned the use of organochlorine pesticides, people began to spray organophosphorus pesticides, pyrethroids, organosulfur pesticides and other insecticides. Although some pesticides are less toxic, tea trees must eventually pass through plant physiological processes. Biochemical action, transferring pesticides in soil and water to tea leaves, so that pesticide residues remain in the tea leaves

This kind of poisonous tea is widely sold in the domestic market, which not only endangers the health of Chinese people, but also seriously affects the export of tea. According to incomplete statistics, only one item of tea pesticide residues exceeds the standard, which reduces the country's annual tea export by about 4 billion yuan. , how to solve the excessive pesticide residues in tea is an important issue to be solved at present

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