Nano AlOOH-coated sodium percarbonate degradation agent for pyrethroids pesticides and preparation method and application thereof

Abstract

The invention discloses a nano AlOOH-coated sodium percarbonate degradation agent for pyrethroid pesticides and a preparation method and application thereof. The nano AlOOH-coated sodium percarbonate degradation agent for the pyrethroid pesticides consists of sodium percarbonate, and is characterized in that: the degradation agent also contains AlOOH sol; and the weight ratio of the sodium percarbonate to the AlOOH sol is 1 / 100-15 / 100. The preparation method comprises one of the following two steps in a scheme A and a scheme B. The application of the nano AlOOH-coated sodium percarbonate degradation agent in degrading the pyrethroid pesticides is characterized in that: nano AlOOH-coated sodium percarbonate is added into residual pesticide-containing water to be treated; and when the concentration of the pyrethroid pesticides is lower than 60 mg / L, the dosage of the sodium percarbonate is between 50 and 60 mg, and the reaction time is 30 minutes. The nano AlOOH-coated sodium percarbonate degradation agent protects active oxygen in sodium percarbonate solid by a nano AlOOH film, and maintains the slow release of the active oxygen. The alkality of the sodium percarbonate solid accelerates the hydrolysis of aluminate salts and strengthens the flocculation effect thereof.

Description

technical field [0001] The present invention relates to a kind of nanometer AlOOH coated sodium percarbonate degradation agent of novel pyrethroid pesticide, the preparation method of this nanometer AlOOH coated sodium percarbonate degradation agent, and the nanometer AlOOH coated sodium percarbonate degradation agent in Application in degrading pyrethroid pesticides. Background technique [0002] Due to the long-term use of organophosphorus, organochlorine and other pesticides, pests have become resistant to pesticides, killing natural enemies, and seriously polluting the environment. It is widely used in the pesticide market due to its excellent biological activity, good environmental compatibility, stable properties, difficult photolysis, low concentration, and fast drug effect. It is known that artificially synthesized pyrethroids have accounted for 1 / 4 of the world's pesticide market. At the same time, pyrethroid pesticides are refractory organic pollutants, and their...

AI Technical Summary

Problems solved by technology

However, sodium percarbonate has the disadvantage of being sensitive to moisture and heat. It is easy to decompose when it encounters water, heat, and heavy metal ions, and it decomposes into oxygen and sodium carbonate at 100 ° C.

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