Slow-release type algal inhibition and control agent

An algae-controlling agent, slow-release technology, applied in the field of preparation of slow-release algae-inhibiting and algae-controlling agents, can solve the problems of the destruction of the balance of the biological community, the poor persistence of allelochemical substances, and the collapse of the water environment, and achieve the goal of maintaining The effect of stability

Inactive Publication Date: 2017-05-31
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, it is often difficult to control the dosage of allelochemicals when they are directly injected into the water body, and the persistence of allelochemicals is poor. If the dosage is too high at one time, it is very likely to cause severe damage to the balance of the biological community in the water body. The overall imbalance of water ecology will lead to rapid deterioration of water quality and rapid collapse of water environment, which will affect the safety of target organisms; if the dosage is too small, the effect of inhibiting and controlling algae will not be obvious, and at the same time, it may be used as an organic nutrient source to promote algae reproduction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Obtaining of allelochemicals: ethyl acetate was used to extract allelochemicals from eucalyptus APMP pulping wastewater, and the obtained organic phase was concentrated by rotary evaporation at 60°C until the volume was 3% of the organic phase, and then volatilized under nitrogen protection Organic solvents, allelochemicals obtained.

[0017] Preparation of slow-release algae-inhibiting and algae-controlling agent: (1) dilute and dissolve the obtained allelochemical substance with ether to form an allelochemical solution with a solid content of 10%; (2) get 10 grams of allelochemical solution, add 50 After 1 gram of distilled water, 30000rpm high-speed shear dispersion treatment at room temperature was processed for 10 minutes; (3) in the mixed solution after high-speed shear dispersion treatment, add 100 grams of granular activated carbon (granular activated carbon is common water treatment activated carbon through grinding and crossing 200 mesh sieves After 4 hours of...

Embodiment 2

[0020] Obtaining of allelochemicals: the same method as in Example 1 was used to prepare allelochemicals.

[0021] The preparation of slow-release algae-inhibiting and algae-controlling agent: (1) dilute and dissolve the obtained allelochemical substance with acetone to prepare an allelochemical substance solution with a solid content of 10%; (2) get 10 grams of allelochemical substance solution, add 75 After the gram of distilled water, 40000rpm high-speed shear dispersion process under room temperature 10 minutes; (3) add 50 gram granular activated carbons (granular activated carbon is common water treatment active carbon through grinding and cross 200 mesh sieves in the mixed solution after high-speed shear dispersion process After 6 hours of stirring and adsorption at low speed, filter with medium-speed filter paper to obtain the adsorbed activated carbon, and wash the adsorbed activated carbon twice with warm water at 40-50 °C according to the mass ratio of water to adsorb...

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Abstract

The invention discloses a preparation method of a slow-release algal inhibition and control agent. The preparation method comprises the following steps of (1) dissolving allelopathic chemicals by a solvent, so as to obtain an allelopathic chemical solution; (2) adding distilled water into the allelopathic chemical solution, and shearing at high speed; (3) after shearing, adding granular activated carbon to adsorb, so as to obtain a slow-release core; (4) crosslinking and coating the slow-release core; (5) sealing and coating the slow-release core after crosslinking and coating by a dialysis membrane. By adopting the technical scheme, the prepared slow-release algal inhibition and control agent can be used for controlling algae of fresh water body and seawater body of miniature water bodies, and controlling the algae of large water domains; after feeding into a water body, the sustained and effective algal inhibition and control effects can be realized, and the severe influence to the water ecology is avoided; while the agent continuously plays functions, the stability of the water body environment is maintained.

Description

technical field [0001] The invention relates to the field of water body pollution control, in particular to a preparation method of a slow-release algae-inhibiting and algae-controlling agent. Background technique [0002] The use of plant allelopathy to inhibit the reproduction of harmful algae has become a hot research and application in the field of water environment management because of its relatively cheap and eco-friendly advantages. Patents 2014105705884, 2015101375729 and 2012102108685 all disclose extraction methods of plant allelochemicals based on organic solvent extraction. However, in practical applications, it is often difficult to control the dosage of allelochemicals when they are directly injected into the water body, and the persistence of allelochemicals is poor. If the dosage is too high at one time, it is very likely to cause severe damage to the balance of the biological community in the water body. The overall imbalance of water ecology will lead to ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C02F1/50
Inventor刘廷志李祥祥钟丽铭
OwnerTIANJIN UNIV OF SCI & TECH