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Stabilizer, preparation method thereof and method for repairing heavy-metal-polluted soil

A technology of polluted soil and stabilizer, which is applied in the field of stabilizer, stabilizer preparation, and repair of heavy metal-contaminated soil. It can solve the problems of high cost, easy to be affected by the soil environment, single component, etc., and achieve migration prevention and good stabilization effect , reducing the effect of bioavailability

Inactive Publication Date: 2018-04-24
北京本农科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a stabilizer, a method for preparing the stabilizer and a method for remediating heavy metal-contaminated soil, so as to alleviate the problems of traditional stabilizers such as single components, high cost, susceptibility to soil environment, and point source pollution.

Method used

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  • Stabilizer, preparation method thereof and method for repairing heavy-metal-polluted soil
  • Stabilizer, preparation method thereof and method for repairing heavy-metal-polluted soil

Examples

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Effect test

Embodiment 1

[0035] Add 2mol / L sodium hydroxide, 25% sodium hydroxide and deionized water to 200-mesh montmorillonite. After fully reacting, take 50 parts of montmorillonite, 50 parts of diatomite, phosphoric acid 20 parts of sodium dihydrogen, 20 parts of potassium sulfide, and 20 parts of magnesium oxide were mixed evenly, and 10 parts of carboxymethyl cellulose, 10 parts of lignin, and 100 parts of deionized water were added, and stirred for 4 hours to obtain a gelatinous substance. Ph value, place it in a drying oven at a temperature of 108°C and dry for 24 hours, take out the dried stabilizer, make powder, sieve, the sieve fineness is 200 mesh, and obtain stabilizer 1#, take 10g of stabilizer 1 and Mix 1000g of heavy metal-contaminated soil, the weight ratio of stabilizer to polluted soil is 1:100, after full reaction, detect the heavy metal content in the soil, the concentrations of cadmium, copper, lead and zinc in the tested polluted soil are 23.5mg / kg respectively , 3650mg / kg, 639...

Embodiment 2

[0038] Add 2mol / L sodium hydroxide, 25% sodium hydroxide and deionized water to 200-mesh montmorillonite. After fully reacting, take 50 parts of montmorillonite, 40 parts of diatomaceous earth, phosphoric acid 20 parts of sodium dihydrogen, 15 parts of potassium sulfide, and 20 parts of magnesium oxide were mixed evenly, and 8 parts of carboxymethyl cellulose, 8 parts of lignin, and 100 parts of deionized water were added, and fully stirred for 4 hours to obtain a gelatinous substance. Ph value, place it in a drying oven at a temperature of 108°C and dry for 24 hours, take out the dried stabilizer, make powder, sieve, and the sieve fineness is 200 meshes to obtain stabilizer 2#, take 10g of stabilizer 1 and Mix 1000g of heavy metal-contaminated soil, the weight ratio of stabilizer to polluted soil is 1:100, after full reaction, detect the heavy metal content in the soil, the concentrations of cadmium, copper, lead and zinc in the tested polluted soil are 23.5mg / kg respectively ...

Embodiment 3

[0041] Add 2mol / L sodium hydroxide, 25% sodium hydroxide and deionized water to 200 mesh montmorillonite. After fully reacting, set aside, weigh 50 parts of montmorillonite, 35 parts of diatomite, phosphoric acid 20 parts of sodium dihydrogen, 10 parts of potassium sulfide, and 20 parts of magnesium oxide were mixed evenly, and 6 parts of carboxymethylcellulose, 6 parts of lignin, and 100 parts of deionized water were added, and fully stirred for 4 hours to obtain a gelatinous substance. Ph value, place it in a drying oven at a temperature of 108°C and dry for 24 hours, take out the dried stabilizer, make powder, sieve, the sieve fineness is 200 mesh, and obtain stabilizer 3#, take 10g of stabilizer 1 and Mix 1000g of heavy metal-contaminated soil, the weight ratio of the stabilizer to the polluted soil is 1:100, after the reaction is complete, detect the heavy metal content in the soil, test the heavy metal content in the soil, and test the concentration of cadmium, copper, le...

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Abstract

The invention relates to the technical field of heavy metal pollution treatment and environment repair, in particular to a stabilizer, a preparation method thereof and a method for repairing heavy-metal-polluted soil. The invention is directed to solve the problems that, for instance, a traditional stabilizer has a single component, is high in cost, and is easily affected by a soil environment, and point source pollution is caused. The stabilizer comprises: by weight, 20-40% of montmorillonite, 20-40% of diatomite, 10-15% of phosphates, 10-15% of potassium sulfide, 10-15% of magnesium oxide and 5-10% of a metal complexing agent. The acting force of chemical bonds between a chemical substance and a pollutant as well as a coagulating agent are used, a stable complexing encapsulation substance is formed, and a good stable effect is achieved.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution treatment and environmental restoration, in particular to a stabilizer, a preparation method of the stabilizer and a method for repairing heavy metal polluted soil. Background technique [0002] Heavy metals are a kind of residual pollutants with relatively stable chemical properties and continuous accumulation. Due to factors such as metal mining, smelting, and atmospheric deposition, the land area polluted by heavy metals continues to expand. Therefore, the problem of heavy metal pollution control has become a scientific issue in my country and the world. With the in-depth study of heavy metal toxicology and the improvement of people's awareness, the disposal of heavy metals has become increasingly strict. At present, except for some valuable metals that are recycled, most of them need to be stabilized. Among various repair technologies, solidification / stabilization is used as A t...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 韩建均于松赵川
Owner 北京本农科技发展有限公司
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