Horizontal barrier material for risk management and control of polluted land parcel and preparation method

A barrier material and risk technology, which is applied in the field of horizontal barrier materials and preparation for the risk management and control of polluted plots, can solve the problems of inconvenient treatment and repair, increase of polluted soil, poor structural strength, etc., and achieve easy mass production, abundant raw material sources, Simple preparation method

Pending Publication Date: 2020-02-28
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems of these materials are: asphalt and concrete cover are thicker, which increases the engineering volume and disposal difficulty of the subsequent treatment and restoration of the contaminated land; while the clay uses a large amount of soil and is expensive, which is easy to increase the contaminated soil an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The horizontal barrier material used for risk management and control of polluted plots in this embodiment is made of a mixture of modified natural short fibers, powder and liquid materials, wherein,

[0031] Described modified natural staple fiber is the modified jute fiber of length 3mm;

[0032] Above-mentioned modified natural short fiber is to be processed gained by following method:

[0033] 1) Soak 3mm jute fiber in 2wt% sodium hydroxide solution, take it out after reacting at 20±2°C for 0.5h, wash it with water several times, and then wash the jute fiber to medium with distilled water containing 1wt% acetic acid After washing several times with water, dry at room temperature;

[0034] 2) Dissolve the silane coupling agent in a solution of ethanol and water with a volume ratio of 3:2, prepare a 5wt% silane coupling agent solution, and adjust the pH of the silane coupling agent solution between 3.5 and 4 with a small amount of acetic acid;

[0035] 3) Soak the ju...

Embodiment 2

[0040] The horizontal barrier material used for risk management and control of polluted plots in this embodiment is made of a mixture of modified natural short fibers, powder and liquid materials, wherein,

[0041] Described modified natural staple fiber is the modified mountain palm fiber of length 5mm;

[0042] Above-mentioned modified natural short fiber is to be processed gained by following method:

[0043] 1) Soak 5mm palm fiber in 5wt% sodium hydroxide solution, react at 20±2°C for 1 hour, take it out, wash it with water several times, and then wash the palm fiber with distilled water containing 1wt% acetic acid until Neutral, after washing with water for several times, put it into the oven, and dry it at 80°C to constant weight;

[0044] 2) Dissolve the silane coupling agent in a solution of ethanol and water with a volume ratio of 3:2, prepare a 5wt% silane coupling agent solution, and adjust the pH of the silane coupling agent solution between 3.5 and 4 with a small...

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Abstract

The invention provides a horizontal barrier material for risk management and control of a polluted land parcel and a preparation method, belonging to the technical field of risk management and controlof polluted land parcels. The material comprises modified natural short fibers, a powder material and a liquid material in a mass ratio of 1: 20: 17, wherein the modified natural short fibers are modified jute fibers or modified Arenga engleri fibers with length of 2-6 mm; the powder material comprises Portland cement, ground calcium carbonate and quartz powder; the liquid material comprises a polymer emulsion, a defoaming agent, a coalescing agent, a compatibilizer, a dispersing agent and deionized water. The preparation method comprises the following steps: pouring the liquid material intoa container, carrying out uniform mixing, and adding a mixture obtained by uniformly mixing the modified natural short fibers and the powder material; and carrying out stirring for 10-20 minutes to obtain slurry liquid without block mass flow, thereby obtaining the material. The horizontal barrier material provided by the invention has the advantages of easy availability of raw materials, low cost, simple preparation method and excellent barrier properties, can block the migration of a polluted medium to a surrounding environment, and can provide a good in-situ horizontal barrier for the polluted land parcel after application.

Description

technical field [0001] The invention belongs to the field of barrier technology for risk management and control of polluted plots, and in particular relates to a horizontal barrier material and a preparation method for risk control of polluted plots. Background technique [0002] In recent years, with the adjustment of urban industrial layout, a large number of heavy polluting industrial enterprises such as non-ferrous metal smelting, chemical industry, electroplating, and tanning have been closed and relocated, leaving behind many polluted plots. These plots are scattered in the city, endangering human living health, Threats to the safety of the ecological environment, and the hidden dangers of environmental risks are prominent. A series of policy requirements on the prevention and control of soil pollution issued by the environmental protection department have led to the rapid development of treatment and restoration technologies for polluted land plots. For problems that...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/10C04B20/02C04B18/24
CPCC04B20/023C04B20/1051C04B28/04C04B2111/00775C04B14/06C04B14/28C04B24/2641C04B24/42C04B24/045C04B24/40C04B22/16C04B18/248Y02W30/91
Inventor 高镜清南瑞琦陈少华张敬申李林帅陈勇高健磊杨蕾高源
Owner ZHENGZHOU UNIV
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