Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A heat-insulating and anti-cracking vertical barrier material for complex pollutants and its preparation method

A technology of anti-cracking and pollutants, which is applied in the field of isolation and control of contaminated sites, can solve the problems of barrier barrier failure, thermal diffusion, and increase in permeability coefficient, and achieve high thermal insulation function, good chemical compatibility, and enhanced treatment effect.

Active Publication Date: 2021-09-28
SOUTHEAST UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These vertical barriers have certain practical disadvantages: First, the current mainstream barriers can only target heavy metals or organic pollutants for prevention and control. Under the erosion of high-concentration complex polluted groundwater, the main component of the barrier material bentonite, montmorillonite, undergoes chemical denudation, and the permeability coefficient increases significantly, which cannot meet the "Technical Specifications for Geotechnical Engineering of Domestic Garbage Sanitary Landfill Sites" and "Remediation Technology for Contaminated Sites" 1*10 proposed by Catalog (First Batch) -9 The m / s vertical isolation requirement makes the barrier barrier ineffective; the second is that the strength of the mainstream vertical barrier barrier is relatively high (>500KPa) or low (2 Greenhouse gases and SO 2 , CO and dust and other harmful substances

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A heat-insulating and anti-cracking vertical barrier material for complex pollutants and its preparation method
  • A heat-insulating and anti-cracking vertical barrier material for complex pollutants and its preparation method
  • A heat-insulating and anti-cracking vertical barrier material for complex pollutants and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1) dissolving cetyltrimethylammonium bromide in distilled water, adding attapulgite, keeping the mass ratio of the two at 1:9, to obtain a suspension;

[0055] Step 2) Keep the suspension prepared in step 1) at a constant temperature at 30°C, use an electric mixer, keep the rotation speed at 200r / min, and continue stirring for 12h to obtain the suspension;

[0056] Step 3) Centrifuge the suspension prepared in step 2) at a speed of 2000r / min for 30min, pour out the supernatant, wash the residue with distilled water, and then centrifuge again. After repeating this operation 3 times, a solid product is obtained ;

[0057] Step 4) drying the solid product obtained in step 3) at 105° C. for 12 hours to obtain a sample;

[0058] Step 5) Grinding the dried sample in step 4) to 200 mesh to obtain an organically modified attapulgite, and then placing it in an oven at 60°C for later use;

[0059] Step 6) adding the treated organically modified attapulgite into the sodium-...

Embodiment 2

[0067] Step 1) dissolving cetyltrimethylammonium bromide in distilled water, adding attapulgite, keeping the mass ratio of the two at 1:9, to obtain a suspension;

[0068] Step 2) Keep the suspension prepared in step 1) at a constant temperature at 35°C, use an electric mixer, keep the rotation speed at 500r / min, and continue stirring for 24h to obtain the suspension;

[0069] Step 3) centrifuge the suspension prepared in step 2) at a speed of 4000r / min for 60min, pour out the supernatant, wash the residue with distilled water, and then centrifuge again. After repeating this operation 6 times, a solid product is obtained ;

[0070] Step 4) The solid product obtained in step 3) was dried at 105° C. for 24 hours to obtain a sample;

[0071] Step 5) Grinding the dried sample in step 4) to 300 mesh to obtain an organically modified attapulgite, and then placing it in an oven at 80° C. for subsequent use;

[0072] Step 6) adding the treated organically modified attapulgite into t...

Embodiment 3

[0080] Step 1) dissolving cetyltrimethylammonium bromide in distilled water, adding attapulgite, keeping the mass ratio of the two at 1:9, to obtain a suspension;

[0081] Step 2) Keep the suspension prepared in step 1) at a constant temperature at 30°C, use an electric mixer, keep the rotation speed at 200r / min, and continue stirring for 12h to obtain the suspension;

[0082] Step 3) Centrifuge the suspension prepared in step 2) at a speed of 2000r / min for 30min, pour out the supernatant, wash the residue with distilled water, and then centrifuge again. After repeating this operation 3 times, a solid product is obtained ;

[0083] Step 4) drying the solid product obtained in step 3) at 105° C. for 12 hours to obtain a sample;

[0084] Step 5) Grinding the dried sample in step 4) to 200 mesh to obtain an organically modified attapulgite, and then placing it in an oven at 60°C for later use;

[0085] Step 6) Add the treated organically modified attapulgite into the sodium-mod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a heat-insulating and anti-cracking vertical barrier material for composite pollutants and a preparation method thereof. The heat-insulating and anti-cracking vertical barrier material is mainly composed of in-situ soil, sodium-modified bentonite, organically modified attapulgite and modified additives. The thermal insulation and anti-cracking vertical barrier material comprises 70-85% of in-situ soil, 8-12% of sodium-modified bentonite, 5%-8% of organically modified attapulgite, and 5%-20% of modified additives. The main components of the modified additive include granulated blast furnace slag powder, activated magnesium oxide, basalt fiber, and nano-zero-valent iron, and the mass ratio is 90:10:10:1~90:30:30:1. The thermal insulation and anti-cracking vertical barrier has the following characteristics: it still maintains a low permeability coefficient against high concentrations of heavy metals and organic compound pollution solutions; it has good chemical compatibility; it provides semi-rigid strength and has a certain toughness to resist cracking; at the same time Provide thermal insulation function; the main materials are all green and resource recycling materials.

Description

technical field [0001] The invention relates to a heat-insulating and anti-cracking vertical barrier material for complex pollutants and a preparation method thereof, belonging to the technical field of isolation and control of polluted sites. Background technique [0002] In recent years, with the development of my country's economy and the adjustment of industrial layout, a large number of industrial enterprises have gradually closed down or moved out of urban areas, including many pesticide factories, chemical factories and other enterprises that are prone to generate high-pollution waste. These polluted sites have multiple types of pollutants. , high pollution concentration, and the characteristics of many polluted sites. Due to the improper disposal of polluting waste by enterprises, a large amount of highly polluting waste has accumulated in the soil of the original site, producing irritating and toxic gases, invading groundwater, flowing into rivers, lakes and seas, se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/10C04B111/34
CPCC04B28/105C04B2111/00017C04B2111/00025C04B2111/00293C04B2111/00801C04B2111/343C04B2201/32C04B2201/50C04B14/10C04B14/102C04B14/104C04B24/005C04B18/141C04B14/46C04B14/34
Inventor 姜哲元杜延军倪浩傅贤雷杨光煜
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com