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

Chemical stabilization compound medicament for reducing heavy metal leaching concentration of soil

A technology of leaching concentration and chemical stability, applied in the restoration of polluted soil, etc., can solve the problems of reducing the leaching concentration of various heavy metals, which are rare, and achieve the effect of reducing migration ability, reducing leaching concentration, and easy promotion

Inactive Publication Date: 2012-02-22
SHENYANG ACAD OF ENVIRONMENTAL SCI
View PDF2 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most curing and stabilizing agents only target one kind of heavy metal, and the research on stabilizing agents that can simultaneously reduce the leaching concentration of multiple heavy metals is still rare.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Take: 5 parts of Ca(OH) 2 , 4 parts of fly ash, 1 part of Na 2 CO 3 , 0.5 parts of polyacrylamide or modified Na 2 SO 4 , mixed evenly to make the present invention.

[0010] The soil from a complex heavy metal-contaminated site in Shenyang was obtained, air-dried, and then ground to obtain the soil before treatment.

[0011] According to the present invention: soil before treatment = 1:20, add the present invention to the soil before treatment, add water to adjust, make the moisture content of the soil before treatment at 20%, and ventilate and maintain for 24 hours under natural conditions.

[0012] The leaching status of heavy metals in soil was determined by the method of "Determination of Leaching Toxicity of Solid Wastes" (GB / T15555.1-155555.11).

[0013] The leaching concentration of each heavy metal in the soil before and after the treatment of Example 1 is:

[0014] mg / L Pb Zn Cd Cu A compound heavy metal polluted soil in Shenyang 2...

Embodiment 2

[0016] Take: 7 parts of Ca(OH) 2 , 3 parts of fly ash, 0.8 parts of Na 2 CO 3 , 0.5 parts of polyacrylamide and 0.5 parts of modified Na 2 SO 4 , mixed evenly to make the present invention.

[0017] All the other are identical with embodiment 1.

[0018] The leaching concentration of each heavy metal in the soil before and after embodiment 2 is controlled is:

[0019] mg / L Pb Zn Ni A lead-contaminated soil in Shenyang 5.96 2.05 1.82 After drug stabilization 0.57 0.63 0.75

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

No PUM Login to View More

Abstract

The invention provides a chemical stabilization compound medicament for reducing a heavy metal leaching concentration of soil, and aims to solve the technical problem that: most solidification and stabilization medicaments are only directed at one heavy metal, and research on stabilization medicaments able to simultaneously reduce leaching concentrations of a plurality of heavy metals is uncommon. The main points of the invention lie in that: the medicament comprises 5-10 parts of Ca(OH)2, 2-5 parts of coal ash, and 0.1-2 parts of Na2CO3 that are mixed uniformly. The compound medicament provided in the invention can reduce leaching concentrations of a plurality of heavy metals in soil.

Description

technical field [0001] The invention relates to a chemically stabilized compound agent for reducing the leaching concentration of heavy metals in soil, and is specifically aimed at the treatment of complex heavy metal polluted soil. The so-called compound heavy metal-polluted soil refers to the soil polluted by two or more heavy metals of lead, cadmium, copper, zinc, chromium, and nickel. Background technique [0002] my country's heavy metal pollution is relatively serious. At present, heavy metal pollution incidents occur frequently, and the prevention and control of heavy metal pollution has received more and more attention at the national level. The "Heavy Metal Pollution Comprehensive Prevention and Control Plan" is the first approved 12th Five-Year Plan. my country's heavy metal-contaminated soil area is large, and the pollution persists for a long time. Many heavy metal-contaminated sites have been formed, many of which are complex heavy metal-contaminated sites, whic...

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
IPC IPC(8): B09C1/00
Inventor 孙俊惠怀胜王鑫李述贤陈辉郭传正
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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