Method for preparing alga inhibitor from barley

A technology of inhibitors and barley, applied in botany equipment and methods, herbicides and algicides, chemicals for biological control, etc., can solve problems such as restricting large-scale use, destroying the beauty of water bodies, and secondary pollution , to achieve good algae inhibition effect, good ecological security and low preparation cost

Inactive Publication Date: 2012-04-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in actual use, the method of directly injecting plants into the water body is mainly used, which not only destroys the beauty of the water body, but also easily causes secondary pollution, which limits the large-scale use of this method

Method used

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  • Method for preparing alga inhibitor from barley

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1.5 Kg of the aerial parts of barley and dry them at 65° C. for 48 hours to obtain dried plant materials. Take 300 grams of dried barley plants and crush them to 20 meshes, infiltrate them with 2 L of ethanol containing 75% alcohol, and extract them three times at 35°C for 2.5 hours each time to obtain ethanol extracts of barley. The ethanol extract of barley was distilled off under reduced pressure in a rotary evaporator at 45°C to obtain extract A. Take 10 grams of extract A, extract 3 times with petroleum ether, each dosage is 300ml, and remove the components that can be dissolved in petroleum ether in aqueous solution A. The remaining extract was extracted with chloroform four times, and the amount of chloroform each time was 400ml, and the chloroform phase B was obtained by separation. After four extractions with ethyl acetate, the amount of ethyl acetate used each time was 350 ml, and the ethyl acetate phase C was obtained by separation. Finally, the above-...

Embodiment 2

[0024] Take 1.5 Kg of above-ground parts of barley and dry them at 55° C. for 72 hours to obtain dried plant materials. Take 500 grams of dried barley plants and crush them to 50 meshes, infiltrate them with 3 L of aqueous methanol with an alcohol content of 70%, and extract them three times at 50°C for 3 hours each time to obtain barley ethanol extracts. The methanol extract of barley was distilled off under reduced pressure in a rotary evaporator at 40°C to obtain an extract A. Get 10 grams of extract A, extract 3 times with heptane, each dosage is 100ml, and remove the components that can be dissolved in heptane in extract A. The remaining extract was extracted with dichloromethane 3 times, and the amount of dichloromethane used each time was 100ml, and the dichloromethane phase B was obtained by separation. After three extractions with ethyl acetate, the amount of ethyl acetate used each time was 80 ml, and the ethyl acetate phase C was obtained by separation. Finally, t...

Embodiment 3

[0026] Take 1.5 Kg of the aerial parts of barley and dry them at 70° C. for 48 hours to obtain dried plant materials. Take 300 grams of dried barley plants and crush them to 50 meshes, infiltrate them with 2L of 80% ethanol in water, and extract them three times at 40°C for 2 hours each time to obtain barley ethanol extracts. The ethanol extract of barley was distilled off under reduced pressure in a rotary evaporator at 40°C to obtain extract A. Get 8 grams of extract A, extract 3 times with sherwood oil, each dosage is 120ml, remove the composition that can be dissolved in sherwood oil in extract A. The remaining extract was extracted with diethyl ether three times, each time the amount of diethyl ether was 150ml, and the diethyl ether phase B was obtained by separation. After 3 extractions with n-butanol, the amount of n-butanol was 120 ml each time, and the n-butanol phase C was obtained by separation. Finally, the ether phase B and n-butanol phase C were distilled off u...

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Abstract

The invention discloses a method for preparing alga inhibitor from a natural plant barley, belonging to the field of water pollution control. The method comprises the following steps of: drying and crushing barley, extracting with ethanol containing water (or low-carbon alcohol containing water) to obtain barley extract liquid; distilling at reduced pressure to obtain an extract A; removing components which can be dissolved in petroleum ether from the extract A; extracting with chloroform (or dichloromethane or diethyl ether) and ethyl acetate (or n-butyl alcohol or acetone) to respectively obtain organic phases B and C; and respectively distilling at reduced pressure to finally obtain alga inhibiting component extracts D and E. The method has the advantages that the method is simple and easy to operate, cost is low, material sources are wide and easy to obtain; moreover, two alga inhibitors with high purity can be obtained at the same time; therefore, the method can be widely used for controlling algal bloom of lakes and reservoirs.

Description

technical field [0001] The invention belongs to the field of water body pollution control, and particularly relates to a method for preparing an algae inhibitor from natural plant barley. Background technique [0002] The rapid development of China in the past 30 years has led to a large amount of nitrogen, phosphorus and other nutrient pollutants directly entering the water body, causing the abnormal reproduction of algae and other aquatic organisms. Many freshwater lakes have rapidly changed from grass-type lakes to algae-type lakes. The coexistence of diatom-dominated and various algae has changed to blue-green algae-dominated, and the ecological balance of the lake has been destroyed. Algae outbreaks are extremely harmful and seriously endanger aquatic ecological security and drinking water safety. [0003] At present, the commonly used algae control methods are mainly source control, chemical control and biological control. Source control achieves the purpose of funda...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/44A01P13/00
Inventor 陈英旭肖溪
Owner ZHEJIANG UNIV
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