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

A technology for pyrethroids and pesticides is applied in the field of controlling the release of pyrethroids pesticides in the bottom of aquaculture ponds, and can solve the problems of not considering the different adsorption mechanisms of biomass charcoal, the single adsorption mechanism of pyrethroids organic matter, and the poor adsorption effect, etc. Achieve the effect of making up for the poor adsorption of small organic molecules, reducing bioavailability, and good adsorption effect

Inactive Publication Date: 2018-08-10
SHANGHAI OCEAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 st...

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

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Embodiment

[0035] S1. Preparation of mixed biochar

[0036] Rinse the corncobs, pine needles and pine wood with water, dry them in an oven at 70°C, divide them into 2-3cm segments, place them in crucibles with lids, and put them into a muffle furnace for high-temperature anoxic cracking for 10 hours, and grind them into After the debris is passed through a 30-mesh sieve, the sieved material is mixed evenly according to the mass ratio of corncobs, pine needles and pine wood at 1:1:1 to obtain mixed biochar; the cracking temperature of corncobs is 450°C-500°C °C, the cracking temperature of pine needles is 300 °C, and the cracking temperature of pine wood is 700 °C.

[0037] S2, preparation of modified zeolite

[0038] First take by weighing 40g natural zeolite and 2g cetyltrimethylammonium bromide (CTMAB), put into the water of 200ml and stir 2h with stirrer at room temperature, then by centrifuge centrifugal washing to product without surfactant, Store in a desiccator after drying at 1...

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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...

Claims

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Application Information

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IPC IPC(8): C02F11/00B01J20/22B01J20/30C02F101/30C02F103/20
CPCB01J20/20B01J20/22C02F11/00C02F2101/306C02F2103/007C02F2103/20
Inventor 李娟英于纹鉴饶应福徐佳艳王茜张晨
Owner SHANGHAI OCEAN UNIV
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