Reducibility solidification stabilization method of processing soil polluted by toxic organics

A technology of stabilization treatment and organic matter, applied in the restoration of polluted soil, etc., can solve the problems of potential environmental damage, inability to destroy and remove pollutants, etc., and achieve the effect of strong adaptability and simple operation.

Inactive Publication Date: 2013-06-12
TSINGHUA UNIV
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, pure solidification/stabilization can only fix pollutants, but cannot de...

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

[0022] (1) Determination of the concentration of toxic organic substances in polluted soil;

[0023] (2) Add ferrous salt equivalent to 2-3 times the mass of toxic organic substances to the soil polluted by toxic organic substances, and water 2-2.5 times the mass of the polluted soil, and turn on the agitator to stir for 40-60 minutes;

[0024] (3) After an interval of 5-24 hours, add the inorganic binder curing agent according to the mass ratio of the inorganic binder curing agent to the soil polluted by toxic organic substances at a ratio of 1: (1-1.5), and stir again for 5-10 minutes to make the material well mixed;

[0025] (4) After the above-mentioned mixed materials are formed through the molding process, the solidified blocks with regular shapes are stacked in situ or put into the landfill, so as to complete the reductive solidification and stabilization of the soil polluted by toxic organic substances.

[0026] The working reducing agent involved in the method provid...

Embodiment 2

[0032] Prepare soil contaminated with trichlorethylene (PCE) at a concentration of 293 mg / kg; add ferrous sulfate solution with ferrous iron content equivalent to 3 times the mass of PCE to the above soil, and keep the water-to-soil mass ratio at 1.5:1. Stir at 50°C for 60 minutes; test results: PCE 134.2 mg / kg, the product is low-toxic dichlorethylene; add Portland cement after 24 hours, the amount is 2 / 3 of the soil mass, and stir again for 10 minutes. Test results: PCE 120.2 mg / kg, the product is low-toxic dichlorethylene. After curing for 1d, 5d, 10d, and 20d, the curing / stabilization rates of PCE were 94.08%, 96.75%, 99.26%, and 99.28%, respectively.

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 discloses a reducibility solidification stabilization method of processing soil polluted by toxic organics, and belongs to the technical fields of hazardous waste treatment and polluted field repair in environmental protection. The reducibility solidification stabilization method of the processing the soil polluted by the toxic organics comprises firstly, adding the soil which is polluted by the toxic organics, water, and a divalent molysite solution into a stirrer, stirring for 40 minutes-60 minutes; enabling the toxic organics to obtain degradation to the maximum extent; and adding inorganic grouting agent curing agents, continuously stirring until materials are evenly mixed, opening a discharge gate of the stirrer to discharge the evenly mixed materials; and at last, forming solidified body building blocks in a regular shape after carrying out a molding procedure on the mixed materials, conveying the building blocks into a maintenance workshop to carry out maintenance or directly placing the building blocks into packaging bags, and accomplishing reducibility solidification stabilization of the soil polluted by the toxic organics. The reducibility solidification stabilization method of the processing soil polluted by the toxic organics has the advantages of being high in a removal rate to the toxic organics, high in a solidification rate to residual pollutants, simple in operation, good in adaptability, and wide in use range.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment and contaminated site restoration in environmental protection, and particularly relates to a method for reductive solidification and stabilization treatment of soil polluted by toxic organic substances. Background technique [0002] For a long time, chlorinated toxic organic compounds, as important chemical raw materials and organic solvents, have been increasingly used in medicine, chemical industry, electronics, leather and other industries. People produce and use a large amount of chlorinated toxic organic compounds every year. Since most chlorinated toxic organic compounds have the characteristics of low water solubility and high accumulation, they are easy to accumulate in the soil, causing serious soil pollution; at the same time, with the acceleration of urbanization and industrialization in With the improvement of the level of pollution, the urban structure and layout nee...

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): B09C1/00B09C1/08
Inventor 刘建国聂小琴曾宪委宋敏英
Owner TSINGHUA UNIV
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