JP2004223346A - Adsorbent for residual agrochemical in crop and soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adsorbent which adsorbs a residual agrochemical in agricultural crops and soil to make ineffective its chemical action. <P>SOLUTION: This adsorbent is prepared by grinding a microporous adsorbent such as active carbon to a size of ten and odd μm by means of e.g. a sand mill and making the ground product water-dispersible with the aid of e.g. a dispersant. It is sprayed onto or applied to agricultural crops having the residual agrochemical or is sprayed onto cultivation soil, whereupon the agrochemical remaining in the agricultural crops or soil is physically adsorbed by the pores to make ineffective the action of the agrochemical component harmful to human bodies. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pesticide residue remover for agricultural products.
[0002]
[Prior art]
Conventional methods for removing pesticide residues from crops have been washing and wiping with water.
[0003]
[Problems to be solved by the invention]
Conventional cleaning and wiping with water cannot efficiently remove fine pesticide residues from crops.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a pesticide component is adsorbed on an adsorbent having fine pores that can be sprayed or applied and is suitable for adsorbing a water-soluble or water-soluble pesticide, thereby invalidating the pesticide. Provide pesticide residue adsorbent.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
By spraying or applying a hydrated or water-soluble adsorbent to activated carbon or zeolite to crops with pesticide residues, the adsorbent adsorbs fine residual pesticide components adhering to the crops into the pores, Negate the chemical action of the compound.
[0006]
【Example】
On November 14, 2002, “Mikan” was applied to a solution (concentration: about 0.15%) prepared by diluting 6 g of Topzin M wettable powder (thiophanate methyl 50%, manufactured by Nippon Soda Co., Ltd.) in 2 liters of water for 5 seconds. Then, on November 19, 2002, a solution obtained by diluting a bamboo charcoal flowable agent (bamboo charcoal 20% by weight) 10-fold was used as a test solution A (concentration: about 1.8%), and attached to the above-mentioned thiophanate methyl. The tangerines immersed in water for 5 seconds are referred to as sample 1, and the tangerines immersed in test solution A for 5 seconds are referred to as sample 2.
[0007]
【The invention's effect】
Analysis of residual pesticide concentration was requested to Sumika Chemical Analysis Service, Ltd. on November 26, 2002. According to the analysis results of the residual pesticide on December 12, 2002, the measured value of thiophanate methyl of sample 1 was 1.33 mg / kg, and the measured value of thiophanate methyl of sample 2 was 0.64 mg / kg. The concentration was reduced by about 52%. The analysis and test method is an HPLC method (fluorescence).

Claims (2)

Pesticide residue adsorbent for agricultural products using porous adsorbent dispersible, hydratable or water-soluble in water or oil 2. The adsorbent for pesticide residues according to claim 1, wherein the adsorbent is a charcoal or activated carbon.