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New method for sand fixing by using blue algae

A new method, cyanobacteria technology, is applied in the field of bio-environmental engineering, which can solve the problems of poor bio-environmental compatibility, inability of plants to survive, and short sand-fixing cycle, and achieve simple operation, sand-fixing effect, environmental protection, and cost-saving effects

Inactive Publication Date: 2015-01-28
XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Various single sand fixation measures have their characteristics and limitations. Although engineering sand fixation is fast and effective, it is costly and has poor compatibility with the biological environment. Although biological sand fixation has a good effect on ecological environment protection, it cannot The climatic and hydrological conditions usually make it impossible for plants to grow or survive after planting; although chemical sand fixation is low in cost, quick and convenient in construction, and has good biocompatibility, the sand fixation cycle is usually short; in terms of large-scale treatment, modern sand control projects Efficient, cheap, fast and convenient

Method used

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  • New method for sand fixing by using blue algae
  • New method for sand fixing by using blue algae
  • New method for sand fixing by using blue algae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a. Select cyanobacteria with curing effect Nostoc linckia FACHB-103, using conventional liquid JM medium at a temperature of 25°C and a light intensity of 45 micromole / m 2 The enrichment culture was carried out for 7 days under the condition of photon yield per second, and the absorbance value of the final algae liquid at 680 nanometers was 0.2;

[0026] b. Place the algae liquid obtained from the enrichment culture in step a on a low-speed stirrer, stir for 30 minutes at a speed of 500 rpm, and add the cationic metal compound MgCl 2 , formulated as the metal cation Mg 2+ Mixed algae solution with a concentration of 2 mol / L;

[0027] c, adjust the pH of the mixed algae solution obtained by enrichment in step b to be 4, and then spray 20 milliliters of the mixed algae solution on 100 g of dry surface sandy soil surface layer of Fukang Beishawo, Gurbantunggut Desert, Xinjiang Uygur Autonomous Region, Put the sand sprayed with the mixed algae solution in a daily dry env...

Embodiment 2

[0029] a. Select cyanobacteria with curing effect Nostoc linckia FACHB-103, using conventional liquid JM medium at a temperature of 25°C and a light intensity of 45 micromole / m 2 The enrichment culture was carried out for 15 days under the condition of photon yield per second, and the absorbance value of the final algae liquid at 680 nanometers was 1.0;

[0030] b. Place the algae liquid obtained from the enrichment culture in step a on a low-speed stirrer, stir for 60 minutes at a speed of 1000 rpm, and add the cationic metal compound MnCl 2 , formulated as a metal cation Mn 2+ Mixed algae solution with a concentration of 1 mol / L;

[0031] c, adjust the pH of the mixed algae solution obtained by enrichment in step b to be 7, and then spray 30 milliliters of the mixed algae solution evenly on 100 g of the surface sandy soil surface of Fukang Beishawo, Gurbantonggut Desert, Xinjiang Uygur Autonomous Region, After spraying the mixed algae solution, the sandy soil was cultured...

Embodiment 3

[0033] a. Select cyanobacteria with curing effect Nostoc linckia FACHB-103, using conventional liquid JM medium at a temperature of 25°C and a light intensity of 45 micromole / m 2 The enrichment culture was carried out for 20 days under the condition of photon yield per second, and the absorbance value of the final algae liquid at 680 nanometers was 1.5;

[0034] b. Place the algae liquid obtained from the enrichment culture in step a on a low-speed stirrer, stir for 90 minutes at a speed of 1500 rpm, and add the cationic metal compound MgCl 2 , formulated as the metal cation Mg 2 Mixed algae solution with a concentration of 0.1 mol / L;

[0035] c, adjust the pH of the mixed algae solution obtained by enrichment in step b to be 10, and then spray 20 milliliters of the mixed algae solution on 100 g of the surface sandy soil surface of Fukang Beishawo, Gurbantunggut Desert, Xinjiang Uygur Autonomous Region, and After spraying the mixed algae solution, the sandy soil was culture...

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Abstract

The invention discloses a new method for sand fixing by using blue algae. The method comprises the steps of firstly selecting the blue algae with a curing function, and placing algae seeds in a proper culture medium for enrichment culture; then uniformly stirring well-growing algae liquid, adding a proper amount of positive ion metal compound to obtain algae liquid with a curing function, then uniformly spraying the algae liquid obtained by enrichment on the surface of sandy soil for multiple times, placing the sandy soil sprayed by the algae liquid under a natural drying environment for culturing multiple days, and then terminating the test, wherein sand grains at the surface of the sandy soil are cemented and fixed by the blue algae through a curing function, so the surface layer sand grains do not transfer. The method is simple and convenient to operate, easy to control and low in cost and can be widely used in fixing of moving and semi-moving dunes in an arid region.

Description

technical field [0001] The invention relates to a new sand-fixing method using blue-green algae, which belongs to the technical field of biological environment engineering. Background technique [0002] Land desertification is a worldwide ecological environment problem. China is one of the countries in the world with large deserts, wide distribution and serious desertification hazards. According to the results of the national desertification census from 1994 to 1996, the total area of ​​deserts and desertification in the country accounted for 17.85% of the total land area. For a long time, due to climate drought and intensified human activities, irrational use of land and insufficient investment in desertification control have caused serious land degradation. According to the survey, from the 1950s to the 1970s, the average annual increase of desertified land was 1560 square kilometers; from the mid-1970s to the mid-1980s, the average annual increase of desertified land wa...

Claims

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Application Information

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IPC IPC(8): E02D3/12C09K17/00
CPCC09K17/00E02D3/12
Inventor 潘响亮宋文娟张道勇
Owner XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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