Purification method of polluted soil

A technology for polluted soil and heavy metal polluted soil, applied in the restoration of polluted soil, chemical instruments and methods, separation methods, etc., can solve problems such as increased loss rate, difficulty in applying polluted soil, loss of soil properties, etc.

Active Publication Date: 2005-08-31
阿斯特古东京股份有限公司 +3
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (2) Difficult to apply to polluted soil with more than 30% of fine particles such as silt and clay
[0014] (4) Due to the removal of silt, clay and organic matter, soil properties are lost and cannot be reused
[0015] In addition,

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
  • Purification method of polluted soil
  • Purification method of polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] Shown next is the purification method of the present invention.

[0077] according to figure 2 The method shown in , using the standard method (5-point mixed method) respectively for pH, lead content, lead dissolution, arsenic content, arsenic dissolution Quantity is analyzed.

[0078] The results are listed in Table 1.

[0079] Each sample was sampled and analyzed for the number of times indicated in the remarks during the experiment of about 3 months, and the average value was listed.

[0080] Table 1

[0081]

sample

pH

Lead leaching

(mg / L)

lead content

(mg / Kg)

Dissolution of arsenic

(mg / L)

Arsenic content

(mg / Kg)

Remark

polluted soil

8.4

0.183

223.0

0.340

176.4

8 times in 3 months

average

washing treatment soil

8.4

0.05

82.9

...

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

Provided is an engineering method for cleaning contaminated soil by which the problem of the cleaning method such as a washing method can be dissolved, content of contaminants in soil is suppressed below a standard and further elution quantity can be suppressed below a standard. The engineering method for cleaning the contaminated soil comprises a washing process in which contaminated soil with heavy metals is washed and is separated into washing muddy water and washing treated soil and a soil stabilizing process in which elution components of heavy metals from the washing treated soil are fixed. Preferably, the washing muddy water separated in the washing process is then separated into treated water and heavy metal-containing solid in a water treating process.

Description

technical field [0001] The present invention relates to a purification method of polluted soil, in more detail, it relates to a purification method of washing harmful heavy metals contained in soil, further realizing insolubility, stabilizing and harmless polluted soil. Background technique [0002] In Japan's Soil Pollution Countermeasures Law, heavy metals such as cadmium, lead, hexavalent chromium, arsenic, total mercury, copper, and selenium (a general term for metals with a specific gravity exceeding 4) are defined together with cyanide, fluorine, and boron. It is a Class 2 specific hazardous substance and is subject to restrictions. [0003] In this law, regarding heavy metals, etc., two standards are introduced from the perspective of the risk to the human body through direct ingestion and the risk to the human body through ingestion through groundwater, etc., and the former is defined as soil content, and the latter is defined as soil dissolution. . [0004] So far...

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): B09C1/02B01D21/01B03B5/00B09C1/00B09C1/04B09C1/08
CPCB09C1/02B09C1/08
Inventor 森本辰雄和田信彦凑秀雄小泽阳子
Owner 阿斯特古东京股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap