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A kind of allelochemical slow-release magnetized lightweight composite material and its preparation method and application

A technology for allelochemicals and composite materials, which is applied in the fields of botanical equipment and methods, chemical instruments and methods, and applications, can solve the problems of inability to achieve sustained and efficient algae suppression effects, achieve easy extraction and recycling, reduce costs, Lightweight effect

Active Publication Date: 2021-06-04
中宇嘉轩(北京)环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The method of plant allelopathy to inhibit the growth of algae is considered to be a new type of biological algae inhibition technology, which has the characteristics of low cost, high efficiency, and good ecological security. Therefore, allelopathy can be used as a method for long-term control of algal blooms, but The easy decomposition of allelochemicals makes the application of this method limited, and there is a problem that it cannot achieve a sustained and efficient algae inhibition effect.

Method used

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  • A kind of allelochemical slow-release magnetized lightweight composite material and its preparation method and application
  • A kind of allelochemical slow-release magnetized lightweight composite material and its preparation method and application
  • A kind of allelochemical slow-release magnetized lightweight composite material and its preparation method and application

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preparation example Construction

[0025] The invention provides a method for preparing an allelochemical slow-release magnetized lightweight composite material, comprising the following steps:

[0026] Calcining and acid leaching the open-pore expanded perlite in sequence to obtain pretreated open-pore expanded perlite;

[0027] Mixing the pretreated open-pore expanded perlite, ferric chloride, ethylene glycol, polyethylene glycol and sodium acetate, and performing magnetization by hydrothermal synthesis to obtain magnetized expanded perlite;

[0028] The magnetized expanded perlite and the allelochemical are blended, impregnated, and then dried to obtain a slow-release magnetized lightweight composite material of the allelochemical, and the allelochemical is lactic acid.

[0029] In the invention, the open-pore expanded perlite is sequentially calcined and acid leached to obtain the pretreated open-pore expanded perlite.

[0030] In the present invention, the expanded perlite is preferably ground into powder...

Embodiment 1

[0048] Weigh 3g of open-cell expanded perlite, put it into a 450°C muffle furnace for calcination for 6h, then put it into a beaker filled with 200mL, 50% concentration of sulfuric acid, and then move the beaker to a 500r / min magnetic stirrer for stirring After stirring for 6 hours, it was washed and filtered with suction, and finally placed in a drying oven at 60°C, and dried for 12 hours to obtain white pretreated open-pore expanded perlite.

[0049] Weigh 1.08g ferric chloride (FeCl 3 ·6H 2 O) Dissolved in 32mL of ethylene glycol to obtain a mixed solution, weighed 0.4g of pretreated open-pore expanded perlite and put it into the mixed solution, stirred for 10min with a magnetic stirrer, controlled the speed at 400r / min, and then added polyethylene glycol 0.8 g, 2.88g of anhydrous sodium acetate, the mixture continued to stir for 20min, and formed a yellow-brown liquid after mutual dissolution, transferred the liquid into a polytetrafluoroethylene reactor and sealed it, an...

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Abstract

The invention provides an allelochemical slow-release magnetized lightweight composite material and a preparation method and application thereof, which belong to the field of water body pollution control. The present invention uses lactic acid as a high-efficiency and water-soluble allelochemical to improve expanded perlite, which improves the defects of current allelochemicals such as poor algae inhibition, easy degradation after functioning, and inability to be accurately applied in practical applications. Perlite has good magnetic properties and can be harvested by magnetic boats. The product is easy to extract and recycle, which can reduce costs; expanded perlite has large reserves, wide sources, low price, light weight, and can float on water. It has the advantages of non-toxicity and good ecological safety. At the same time, the composite material has good thermal stability and can effectively resist the influence of temperature changes in the natural water environment on the algae inhibition effect.

Description

technical field [0001] The invention relates to the technical field of water body pollution control, in particular to an allelochemical slow-release magnetized lightweight composite material and a preparation method and application thereof. Background technique [0002] With the rapid development of industry and agriculture in our country, a large number of nutrient pollutants containing nitrogen and phosphorus enter rivers and lakes, causing rapid eutrophication of lakes, directly leading to algal blooms, and thus causing algal blooms. In recent years, the eutrophication of water bodies has become serious, and algal blooms have occurred relatively frequently. The control methods of traditional algae bloom include physical method, chemical method and biological method. The physical method has defects such as time-consuming, labor-intensive, difficult to operate, expensive large-scale equipment, high cost, and limited scope of application, so it cannot be popularized on a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N37/36A01N25/08A01P13/00C02F1/50C04B41/00
CPCA01N25/08A01N37/36C02F1/50C02F2103/007C02F2303/20C04B41/0072C04B41/009C04B14/185
Inventor 洪喻张晨康战明明
Owner 中宇嘉轩(北京)环保科技有限公司
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