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Heavy metal and soluble phosphorus contaminated soil remediation agent and treatment process thereof

A soil remediation agent and a treatment process technology, which are applied in the field of heavy metal and soluble phosphorus-contaminated soil remediation agents and their treatment processes, can solve problems such as impact and phosphorus exceeding the standard, and achieve the effects of improving life quality, soil environmental quality and simple operation.

Inactive Publication Date: 2020-04-03
湖南湘牛环保实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the seriousness and complexity of soil heavy metal and phosphorus pollution, such as the current restoration of heavy metal-contaminated soil mainly focuses on the solidification and stabilization of heavy metals, but heavy metal-contaminated soils contain water-soluble phosphorus or added heavy metal curing agents and stabilizers. Contains water-soluble phosphorus, and its water-soluble phosphorus makes the phosphorus in the receiving water body exceed the standard, causing the problem of eutrophication in the water body, which has a great impact on life and modern agriculture, and has not been paid attention to at present

Method used

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  • Heavy metal and soluble phosphorus contaminated soil remediation agent and treatment process thereof
  • Heavy metal and soluble phosphorus contaminated soil remediation agent and treatment process thereof
  • Heavy metal and soluble phosphorus contaminated soil remediation agent and treatment process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Raw material: 500g of heavy metal and phosphorus polluted soil;

[0026] Agent: Mixed agent (30% potassium dihydrogen phosphate, 15% quicklime, 15% cement, 35% iron sulfate, 5% sodium lignosulfonate), polyaluminum chloride (PAC) (0.1%), polyacrylamide ( PAM) (0.1%);

[0027] Mixed agent / raw material ratio: 2.0:100;

[0028] temperature: room temperature;

[0029] Experimental steps: add the mixed agent and raw materials into the stirring equipment, stir and mix for 60 minutes, then add polyaluminum chloride (PAC), stir again for 60 minutes, and finally add polyacrylamide (PAM) and continue stirring for 30 minutes. Conservation for 7 days.

[0030] The experimental results, the analysis results of soil heavy metal content and total phosphorus content (unit: mg / L).

[0031]

Embodiment 2

[0033] Raw material: 500g of heavy metal and phosphorus polluted soil;

[0034] Agent: Mixed agent (45% potassium dihydrogen phosphate, 25% quicklime, 20% zeolite powder, 5% potassium chloride, 5% sodium dodecylbenzenesulfonate), cement 2g, polymerized iron sulfate (SPFS) 6g, Polyacrylamide (PAM) 5g;

[0035] Mixed agent / raw material ratio: 1:100;

[0036] temperature: room temperature;

[0037] Maintenance time: 7 days;

[0038] Experimental steps: add the mixed agent + cement and raw materials into the mixing equipment, stir and mix for 60 minutes, add polymeric ferric sulfate (SPFS), stir for 60 minutes, and finally add polyacrylamide (PAM), continue to stir for 30 minutes, and maintain for 7 days.

[0039] Experimental results, analysis results of soil heavy metals and total phosphorus content (unit: mg / L)

[0040]

Embodiment 3

[0042] Raw material: 500g of heavy metal and phosphorus polluted soil;

[0043] Agents: sodium dihydrogen phosphate, quicklime, cement, iron sulfate, sodium lignosulfonate;

[0044] temperature: room temperature;

[0045] Stirring time: 60min;

[0046] Maintenance time: 7 days;

[0047] The dosage of the drug is as follows:

[0048]

[0049] The content of heavy metals in soil flooding was analyzed under the conditions of different chemical dosage ratios, and the results are shown in the following table:

[0050] Analysis results of heavy metal content in soil water soaked in sodium dihydrogen phosphate solidification experiment (unit: mg / L)

[0051]

[0052] The experimental results show that the heavy metal content and total phosphorus content of soil flooding can simultaneously meet the Class IV standard in Table 1 of "Surface Water Environmental Quality Standard" (GB3838-2002).

[0053] The present invention adopts stabilizer and fixative combination technology ...

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Abstract

The invention discloses a heavy metal and soluble phosphorus contaminated soil remediation agent and a treatment process thereof, wherein a mixed agent is formed by using a stabilizer and fixing agentcombination technology, and specifically comprises the following components: potassium dihydrogen phosphate, sodium dihydrogen phosphate, quick lime, potassium chloride, zeolite powder, cement, ferric sulfate, sodium lignin sulfonate and sodium dodecyl benzene sulfonate. According to the invention, heavy metal and soluble phosphorus contaminated soil is treated by adopting a stabilizer and fixingagent combined technology to deeply solidify and stabilize the soluble heavy metals and the soluble phosphorus in the soil, so that the contents of the heavy metals and the phosphorus in the remediated soil water meet the IV-class standard in the Table 1 of Environmental Quality Standards for Surface Water, and the method has the advantages of simple operation, low restoration cost, easily available solidify agent and stabilizing agent and the like, can effectively reduce the amount of heavy metals and phosphorus pollutants in soil, effectively solves the problem of heavy metal and phosphoruspollution in drainage basins and regions, continuously improves the environmental quality of water and soil, greatly improves the water quality, and also guarantees the safety of agricultural products and foods.

Description

technical field [0001] The invention relates to the technical field of environmental engineering technology and heavy metal and phosphorus-contaminated soil remediation, in particular to a heavy metal and soluble phosphorus-contaminated soil remediation agent and a treatment process thereof. Background technique [0002] With the rapid development of industrialization and urbanization, soil heavy metal pollution has become a prominent environmental problem that cannot be ignored. Heavy metal pollution in the ecological environment has become more serious and widespread, seriously affecting people's quality of life and health, and posing a threat to environmental safety and agricultural product safety. Toxic heavy metals have the characteristics of concealment, long-term, accumulation, non-degradability and irreversibility in the process of soil pollution, which not only lead to the decline of soil fertility and crop yield and quality, but also easily lead to groundwater poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/40C09K101/00
CPCB09C1/08C09K17/40C09K2101/00
Inventor 戴慧敏李先柏徐自稀方志斌汤恕
Owner 湖南湘牛环保实业有限公司
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