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Soil remediation chemical and remediation method thereof

A technology of soil remediation and medicament, which is applied in the field of soil remediation medicament and its repair, which can solve the problems that the remediation agent cannot achieve a good repair effect, the applicable pH range is narrow, and the use effect is not obvious, so as to shorten the reaction and maintenance time, and apply The effect of widening the range and improving the restoration effect

Active Publication Date: 2015-10-14
CHENGDU DEFEI ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these existing remediation agents still have the following problems: 1. The applicable pH range is narrow, and can only be used in polluted soils with a pH of 6 to 8. When the polluted soil is outside the pH range, traditional remediation agents cannot It has a good repair effect; 2. The proportion of chemicals needed to be added in the treatment of polluted soil is relatively high, which leads to the high cost of its use and increases the burden on the enterprise; 3. The effect of use is not obvious. Finally, it takes a long time to stabilize the treated soil, and it takes a long time to complete the treatment after being stabilized. The efficiency of the treatment is low, and the cost of the input required for the treatment is increased, which further aggravates the situation. business burden
[0004] Therefore, traditional soil remediation agents cannot well meet the requirements of wide application range, good remediation effect and low input cost, and further improvement is urgently needed

Method used

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  • Soil remediation chemical and remediation method thereof
  • Soil remediation chemical and remediation method thereof
  • Soil remediation chemical and remediation method thereof

Examples

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Embodiment 1

[0032] The soil remediation agent of the present invention is composed of a powder and a liquid agent, wherein the powder is composed of the following substances by weight percentage, that is, it is composed of Portland cement with a weight percentage of 20% to 65%, and quicklime with a weight percentage of 20% to 65%. , 10% to 18% of clay minerals, 2% to 5% of iron-based compounds and 5% to 10% of sulfur-based compounds; and the liquid agent is composed of the following substances by weight percentage, that is, it is composed of 5%-20% slow-release sulfate, 3%-10% phosphorus-based compound and 70%-92% water.

[0033] For ease of illustration, the present invention divides the polluted soil with different pH values ​​and Pb content into several areas, and respectively adopts traditional mineralization stabilizer, heavy metal ion trapping agent and heavy metal ion chelating agent and soil remediation agent of the present invention to repair For comparison, the data are as follo...

Embodiment 2

[0071] Present embodiment is the method when utilizing the soil remediation agent of embodiment 1 to carry out soil remediation, and it may further comprise the steps:

[0072] A. Collect polluted soil and clean up the sundries in it through sorting equipment. Among them, the sundries mainly include stones, bricks, cement blocks, garbage and plant roots and other intractable or untreatable substances mixed in the soil, thereby improving the treatment effect of the soil and the service life of each equipment; after cleaning The moisture content of the soil should be controlled in the range of 10%-30%, and its pH value should be in the range of pH2-13.

[0073] B. The cleaned soil is crushed by the crusher and sent to the batching machine. Wherein, the particle size of the soil after crushing is not greater than 2cm.

[0074] C. Add the crushed soil into the mixing mixer through the batching machine.

[0075] D. Add restoration agents into the mixing mixer, and mix it with th...

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Abstract

The invention discloses a soil remediation chemical which is characterized by comprising powder and liquid, wherein the powder comprises 20wt%-63wt% of portland cement, 20wt%-63wt% of calcined lime, 10wt%-18wt% of clay minerals, 2wt-5wt% of iron-based compound and 5wt%-10wt% of sulfenyl compound; the liquid comprises 5wt%-20wt% of controlled-release sulphate, 3wt%-10wt% of phosphorus-based compound and 70wt%-92wt% of water; the powder mass and liquid volume proportioning range is 1Kg:0.5L-1Kg:4L. According to the soil remediation process and the remediation chemical provided by the invention, the application range is enlarged, the treatment efficiency is improved, the chemical feeding proportion is reduced, and the remediation burden of enterprises is well reduced.

Description

technical field [0001] The invention belongs to the field of land management and environmental protection, and in particular relates to a soil remediation agent capable of remediating soil with excessive heavy metals and a repair method thereof. Background technique [0002] At present, people mainly use the following three kinds of restoration agents to repair the land where heavy metals exceed the standard, namely ion mineralization stabilizers, heavy metal ion capture agents and heavy metal ion chelating agents. The main components of the above three kinds of restoration agents are all sulfur-based compounds, phosphorus-based compounds and calcium-based compounds in clay soil. Alkaline or alkaline substances, so that the heavy metal ions are no longer in a free state, thereby preventing the heavy metal ions from causing secondary pollution to the water or soil environment, and finally achieving the role of heavy metal ion stabilization. [0003] However, these existing r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B14/10C04B22/14
Inventor 李志黎冰张弘春曾翔
Owner CHENGDU DEFEI ENVIRONMENTAL ENG CO LTD
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