Method of controlling esbiothrin pesticide release of bottom mud of aquaculture pond

Abstract

The invention discloses a method of controlling esbiothrin pesticide release of bottom mud of an aquaculture pond. A mixed absorbent is prepared by adding modified zeolite powder into maize cobs, pineneedles and pine biomass charcoal; an esbiothrin pesticide in the bottom mud of the aquaculture pond is absorbed by a synergistic effect of three absorption mechanisms, namely surface absorption, a distribution effect and a gap filling effect; the absorption effect stability is improved; the influence of an environmental pH, environmental media, coexisting ions and the like on an absorption effect is reduced; when the absorbent is added to soil, the migration of organic pollutants into animals and plants can be reduced significantly; the biological effectiveness of the pollutants is reduced;the defects of a poorer absorption effect of the biomass charcoal on organic micromolecules with higher polarity is overcome; raw materials are simple and easy to obtain; the method is low in cost andsuitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of soil remediation and environmental treatment, and in particular relates to a method for controlling the release of pyrethroid pesticides from bottom mud of breeding ponds. Background technique [0002] In recent years, the problem of residues of highly toxic pesticides has received more and more attention, and countries around the world have also begun to take various measures to deal with it, such as strictly restricting the production and use of highly toxic pesticides. A large class of pesticides that are artificially synthesized after organophosphorus and carbamate, have better environmental compatibility, high biological activity and high stability, have replaced organophosphorus pesticides and organochlorine pesticides in recent years as the main pesticide types. However, with its wide and large application, and because it is relatively stable in the environment and difficult to degrade under natura...

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Problems solved by technology

[0003] Application No. 201710136084.5 discloses a method for repairing pyrethroid-injured ponds and river crab culture. By adding microbial agents and quicklime to degrade and restore the environment of pyrethroid-injured ponds, but compared with large-scale aquaculture ponds, the adsorption effect is slow and the cycle Chang; Application No. 201410136171.7 discloses a repair method for cypermethrin-contaminated soil, using biochar prepared from agricultural and forestry waste corn stalks as the main raw material to promote the degradation of cypermethrin in soil and repair it

In the above-mentioned prior art, on the one hand, due to insufficient sources of biochar production, the adsorption mechanism for pyrethroid organic matter is single, and the adsorption effect is not good; on the other hand, the carbon production process is relatively simple, and the biomass prepared at different temperatures is not considered. The problem of different carbon adsorption mechanisms

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