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Method for preparing biological crust sand-fixing material

A technology of biological crust and preparation steps, which is applied in the direction of soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve the problems of environmental secondary pollution, poor sand-fixing effect, and scarcity of raw materials, and achieve low cost and improved environmental protection. Water and water retention performance, the effect of preventing the evaporation of water

Inactive Publication Date: 2018-11-20
苗霞明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: the desertified sand is easy to be blown up with the wind to form flying sand, and in severe cases, a sandstorm with a wider influence range and greater destructive power will be formed; the raw material price of the existing sand-fixing material is high, and the raw material Scarcity, poor sand-fixing effect, and some will cause secondary pollution to the environment. A preparation method of biological crust sand-fixing material is provided.

Method used

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  • Method for preparing biological crust sand-fixing material

Examples

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example 1

[0024]Take 100g of attapulgite stick clay and mix it with 1kg of sulfuric acid solution with a molar concentration of 3mol / L, and keep stirring at 300r / min for 10h. After the reaction is over, centrifuge to collect the precipitate, wash the precipitate with deionized water until the pH of the washing solution is 6, and then The precipitate was placed in a drying oven, dried at 100°C to constant weight, then put into a mortar and ground, and passed through a 200-mesh sieve to obtain modified attapulgite. Take 100g of urea, 30g of modified attapulgite, and 60g of biomass heat To dissolve the oil, put 200g of 37% formaldehyde solution into a beaker, stir at 300r / min for 20min, adjust the pH to 8.0 with 10% sodium hydroxide solution, keep stirring at 75°C for 40min, and then use the mass fraction Adjust pH to 5 for 5% formic acid solution, keep stirring at 80°C for 40 minutes, then adjust pH to 8.0 with 10% sodium hydroxide solution, add 60 g of biomass pyrolysis oil, keep stirring...

example 2

[0026] Take 150g of attapulgite stick clay and mix it with 1kg of sulfuric acid solution with a molar concentration of 3mol / L, and keep stirring at 350r / min for 13h. After the reaction is over, centrifuge to collect the precipitate, wash the precipitate with deionized water until the pH of the washing solution is 6, and then The precipitate was placed in a drying oven, dried to constant weight at 103°C, put into a mortar and ground, and passed through a 200-mesh sieve to obtain modified attapulgite. Take 150g of urea, 45g of modified attapulgite, and 90g of biomass heat To remove oil, put 300g of 37% formaldehyde solution into a beaker, stir at 350r / min for 25min, adjust the pH to 8.3 with 10% sodium hydroxide solution, keep stirring at 78°C for 40min, and then use the mass fraction Adjust pH to 5 for 5% formic acid solution, keep stirring at 80°C for 40 minutes, then adjust pH to 8.0 with 10% sodium hydroxide solution, add 60 g of biomass pyrolysis oil, keep stirring at 70°C f...

example 3

[0028] Take 200g of attapulgite stick clay and mix it with 2kg of sulfuric acid solution with a molar concentration of 4mol / L, and continue stirring at 400r / min for 15h. After the reaction is over, centrifuge to collect the precipitate, wash the precipitate with deionized water until the pH of the washing solution is 7, and then The precipitate was placed in a drying oven, dried to constant weight at 105°C, put into a mortar and ground, and passed through a 200-mesh sieve to obtain modified attapulgite. Take 200g of urea, 60g of modified attapulgite, and 120g of biomass heat To remove oil, put 400g of 37% formaldehyde solution into a beaker, stir at 400r / min for 30min, adjust the pH to 8.5 with 10% sodium hydroxide solution, keep stirring at 80°C for 50min, and then use the mass fraction Adjust pH to 6 for 5% formic acid solution, keep stirring at 85°C for 50 minutes, then use 10% sodium hydroxide solution to adjust pH to 8.5, add 120g of biomass pyrolysis oil, keep stirring at...

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Abstract

The invention relates to a method for preparing a biological crust sand-fixing material, and belongs to the technical field of environmental protection materials. Pyrolysis oil is used as a main product of rapid pyrolysis of agricultural and forestry biomass and generates urea-formaldehyde resin as a chemical sand-fixing agent together with urea and formaldehyde to improve the hydrophilic propertyand water retention property of soil, the silicon hydroxyl contained in the surface of attapulgite can be further activated by acid modification, a composite high water absorbing material is preparedby polymerization grafting reaction of the attapulgite and the urea-formaldehyde resin, stable amide and amine generated by the reaction of the pyrolysis oil and the urea form an effective slow-release nitrogen fertilizer, and the lignin in the pyrolysis oil is a humic acid-containing substance that can return carbon in the fertilizer to the soil to provide a stable growth promoting environment for the formation of microalgae biological crusts, so that a certain amount of desert algae grafted can promote rapid formation of cyanobacteria crusts on the surface of quicksand to achieve biologicalsand fixation and chemical sand fixation.

Description

technical field [0001] The invention relates to a preparation method of a biological crust sand-fixing material, which belongs to the technical field of environmental protection materials. Background technique [0002] The desertified land on the world's land accounts for about 30% of the total land area, and the desertified area continues to expand with the continuous destruction of the environment and frequent human activities. On the other hand, the world's population continues to increase, and the per capita land area continues to decrease, and mankind will face a serious food crisis. In order to avoid this kind of crisis, it is very necessary for human beings to protect the land and manage the land that has been destroyed and gradually desertified, so as to restore its ecosystem and land functions. [0003] Desertification refers to land degradation caused by various natural and man-made reasons such as climate change, human destructive activities, etc. in arid, semi-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K105/00
CPCC09K17/40C09K2105/00
Inventor 苗霞明张桂芳李静
Owner 苗霞明
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