Unlock instant, AI-driven research and patent intelligence for your innovation.

Repairing agent, and method for stably repairing mercury-polluted soil by adopting repairing agent

A restoration agent and soil technology, applied in the field of contaminated soil treatment and restoration, can solve the problems of small amount of mercury-contaminated soil, low concentration of mercury content, low technical threshold, etc., and achieve the effect of low price, low acid leaching concentration, and easy promotion

Inactive Publication Date: 2021-06-15
POTEN ENVIRONMENT GRP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the restoration of mercury-contaminated soil in my country mainly focuses on the passivation restoration of mercury-contaminated farmland soil. From the perspective of domestic restoration projects, the stabilization technology has a relatively low technical threshold, high economic benefits, and is convenient for construction management. Applied to projects with small amount of mercury-polluted soil, low mercury concentration, and tight operation cycle

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
  • Repairing agent, and method for stably repairing mercury-polluted soil by adopting repairing agent
  • Repairing agent, and method for stably repairing mercury-polluted soil by adopting repairing agent
  • Repairing agent, and method for stably repairing mercury-polluted soil by adopting repairing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Collect mercury-contaminated soil, remove stones and plant rhizomes, crush them, mix them evenly, and air-dry them naturally (select samples to measure their moisture content), pass through an 80-mesh sieve after grinding, and weigh 24 parts after fully mixing Samples, 3 samples are used as blank samples, 21 samples are used as processed samples, each sample is accurate to 200.0g, and the test processing steps are shown in Table 1.

[0063] (2) Determination of blank sample CK 1 、CK 2 、CK 3 The total amount of mercury pollution and acid leaching concentration.

[0064] (3)CK 1 、CK 2 、CK 3 The average value of mercury content in the sample is 2403mg / kg. According to the calculation of the molar ratio S:Hg, empirical parameter ratio, etc., the added quality of calcium polysulfide, ferrous sulfate, humic acid powder in each sample, calcium polysulfide water agent The active ingredient content is about 29%, so the mass percent of calcium polysulfide, ferrous sulfa...

Embodiment 2

[0068] (1) On-site excavation of 10 square meters (m 3 ) Mercury polluted soil, soil density is 1.8g / cm 3 After mechanical stirring and mixing, 6 mixed samples were collected to determine the total amount of mercury pollution and acid leaching concentration.

[0069] (2) Obtaining the average concentration of mercury content in the mercury-contaminated soil by the data is 3187mg / kg, calculates and learns to need calcium polysulfide 212kg (calcium polysulfide aqua is 730kg), ferrous sulfate 540kg, humic acid powder 180kg, Actually add calcium polysulfide aqua 720kg, ferrous sulfate 525kg, humic acid powder 175kg, the mass percent of calcium polysulfide, ferrous sulfate and humic acid powder is 23%: 58%: 19%, humic acid powder grain The diameter is 80 mesh.

[0070] (3) the CK 1 、CK 2 、CK 3 、CK 4 、CK 5 、CK 6 The samples were sieved for the first time and sieved for the second time to make the soil particle size 3 cm. Weigh the calcium polysulfide water agent according t...

Embodiment 3

[0074] (1) On-site excavation of 10 square meters (m 3 ) Mercury polluted soil, soil density is 1.8g / cm 3 After mechanical stirring and mixing, 6 mixed samples were collected to determine the total amount of mercury pollution and acid leaching concentration.

[0075] (2) The average concentration of mercury content in mercury-contaminated soil obtained from the data is 2209mg / kg, and it is calculated that 147kg of calcium polysulfide (calcium polysulfide aqua 506kg), 540kg of ferrous sulfate, and 180kg of humic acid powder are needed. Add calcium polysulfide aqua 500kg, ferrous sulfate 500kg, humic acid powder 150kg, the mass percent of calcium polysulfide aqua, ferrous sulfate and humic acid powder is 18%: 63%: 19%, humic acid powder The particle size is 80 mesh.

[0076] (3) the CK 1 、CK 2 、CK 3 、CK 4 、CK 5 、CK 6 The samples were sieved for the first time and sieved for the second time to make the soil particle size 3 cm. Weigh the calcium polysulfide water agent ac...

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
particle diameteraaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention provides a repairing agent, and a method for stably repairing mercury-polluted soil by adopting the repairing agent. The repairing agent comprises calcium polysulfide, ferrous salt and humic acid powder, and the mass percent of the calcium polysulfide, the ferrous salt and the humic acid powder is (16-23%): (56-63%): (19-28%) based on the total mass of the repairing agent. The method for repairing the mercury-polluted soil adopts the repairing agent and comprises the following steps: (1) calculating the total mercury pollution amount of the soil in a repairing area; (2) adding calcium polysulfide and ferrous salt into the soil in batches, uniformly stirring and mixing, and piling and maintaining for 2-4 days; and (3) adding humic acid powder into the soil, uniformly stirring and mixing, keeping the water content of the soil at 30-50%, and piling and maintaining for 6-8 days. By adopting the method, the mercury toxicity leaching of the soil in the mercury pollution site can be effectively reduced.

Description

technical field [0001] The application relates to the technical field of contaminated soil treatment and restoration, in particular to a restoration agent and a method for stabilizing and repairing mercury-contaminated soil using the restoration agent. Background technique [0002] Mercury is the only heavy metal that exists in a liquid state at room temperature. Because of its characteristics different from other heavy metals and its high persistence, high biological toxicity, and high mobility in soil, mercury-contaminated soil has attracted widespread public attention. . A large number of mercury-containing and mercury-applied chlor-alkali industry, coal-fired chemical industry, and electronic fluorescence industry process updates have led to more and more mercury-contaminated sites. [0003] According to land use planning, farmland polluted soil is generally conditioned by spreading passivators to reduce the ecological activity of mercury and reduce the absorption of me...

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 Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K109/00
CPCB09C1/08C09K17/40C09K2109/00
Inventor 李宁薛立勇田媛郭伟温旭张建平
Owner POTEN ENVIRONMENT GRP