Low-cost environment-friendly sand fixing agent and preparation method thereof

An environment-friendly, sand-fixing agent technology, applied in the field of sand-fixing, can solve the problem of high cost, and achieve the effects of low cost, favorable plant growth, and improved water retention rate

Active Publication Date: 2020-05-22
NANTONG UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Low-cost environment-friendly sand fixing agent and preparation method thereof
  • Low-cost environment-friendly sand fixing agent and preparation method thereof
  • Low-cost environment-friendly sand fixing agent and preparation method thereof

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preparation example Construction

[0036]The polysaccharides produced by bast fiber degumming are wastes in the processing process and can be used directly without extraction, separation and purification, which has a cost advantage. There are many degumming methods for bast fibers, including physical degumming, chemical degumming and microbial degumming. Compared with the residual rubber obtained by other degumming methods, the residual rubber waste obtained by the microbial degumming method has outstanding application advantages. It is reflected in: (1) The degumming process does not use chemical reagents, and the subsequent processing steps are simple. Due to the use of various enzymes produced by Bacillus to soften, loosen, and remove colloids, no chemical reagents are used, and there are no large amounts of acids, alkalis, oxidants or surfactants in the residual plastic waste, and there is no need to increase sand-fixing agents in subsequent preparations. steps to remove these chemicals. (2) The molecular...

Embodiment 1

[0054] Put ramie raw hemp, soda ash, ammonium sulfate, dipotassium hydrogen phosphate and water into the degumming tank according to the ratio of 140:6:2:1:1200 by weight; heat up to 120°C and sterilize for 20 min; Bacillus subtilis was inoculated into the degumming tank, and it was aerated and fermented at 40°C for 8 h to obtain microbial degumming residual gum waste liquid A1, which was canned into a closed container. When directly applied as a sand-fixing agent, dilute microbial degumming residual glue waste A1 with water to 3 times the original volume, stir evenly at 200 r / min, spray on the surface of the sand, and spray at a rate of 200 g / m 2 . The application effect of sand fixation is shown in Table 1.

[0055]

[0056] Note: The experimental site is the desertified sandy land in the Horqin area of ​​Inner Mongolia. The pH of the ramie chemical degumming and sand-fixing agent was adjusted to neutral before application; the linseed gum was obtained by water extracti...

Embodiment 2

[0059] Put ramie raw hemp, soda ash, ammonium sulfate, dipotassium hydrogen phosphate and water into the degumming tank according to the ratio of 140:6:2:1:1200 by weight; heat up to 120°C and sterilize for 20 min; Basic Bacillus subtilis was inoculated into the degumming tank, aerated and fermented at 40°C for 8 hours to obtain residual rubber waste liquid, concentrated at room temperature under 0.09MPa negative pressure to 1 / 6 of the original volume, and concentrated residual rubber waste liquid A2 was obtained, which was filled in cans until airtight container. The bast fibers after microbial degumming are subjected to the steps of fiberizing, rinsing and water washing successively to obtain residual rubber waste liquid in the rinsing stage, which is concentrated to 1 / 10 of the original volume at room temperature under 0.09MPa negative pressure to obtain concentrated residual rubber waste liquid B2, tank Pack into an airtight container. Add 10% sucrose to the concentrated ...

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Abstract

The invention provides a low-cost environment-friendly sand fixing agent and a preparation method thereof. The sand fixing agent adopts residual gum waste liquid of bast fiber microbial degumming. Thepreparation method comprises the following steps: microbial degumming of bast fiber, auxiliary treatment after microbial degumming, concentration and filling of residual gum waste, inoculation of anaerobic bacteria into concentrated residual gum waste liquid, mixing of residual gum or residual gum concentrated liquid, dilution and atomization spraying. The sand fixing agent product is developed by utilizing the characteristics that polysaccharide substances in the bast fiber residual gum absorb water, retain water, have strong adhesive force to sand grains, are easy to obtain and environmentally friendly, not only has the characteristics of good sand fixing effect, low cost and no pollution, but also can improve the physical and chemical properties of flowing sand soil. On the premise that no chemical reagent is used, the hardness of the sand bonded crust layer can reach 1.8-2.7 Kg/cm<2> after the scheme is implemented, the water retention rate of sand land is increased by 15 times, and the sand lifting air speed exceeds 20 m/s; the contents of organic carbon and total nitrogen in the sand soil are respectively increased by 580% and 470% or above, and the vegetation coverage reaches 28-33% one year after the sand fixing agent is sprayed.

Description

technical field [0001] The invention belongs to the technical field of sand fixing, and in particular relates to a low-cost, environment-friendly sand fixing agent and a preparation method thereof. Background technique [0002] Bast fiber is one of the important raw materials for textile or composite materials. The necessary step for such raw materials to obtain high value-added applications is degumming to obtain fibers with thin diameter and high aspect ratio. During this process, a large amount of residual glue waste will be generated. The main components of plant residual gum are polysaccharides, including hemicellulose, pectin, etc. In addition, the residual gum also contains a small amount of lignin, fat wax and water-soluble substances. Among them, hemicellulose accounts for about 50% of the total colloid and is composed of complex heteropolysaccharide molecules. Taking ramie as an example, polyarabinose glucuronide xylose, polyglucose mannose and polygalactose gluc...

Claims

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Application Information

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IPC IPC(8): C09K17/40D01C1/00C05F7/00C09K105/00
CPCC05F7/00C09K17/40C09K2105/00D01C1/00Y02A40/20
Inventor 董震褚特野张凯锋赵志慧邱新海闫德仁丁志荣
Owner NANTONG UNIVERSITY
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