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Cadmium-lead compound contaminated soil repairing agent and application thereof

A soil remediation agent and composite pollution technology, which is applied in the field of lead composite contaminated soil remediation agent and cadmium, can solve the problems of low remediation efficiency and high treatment cost, achieve high reduction performance, high adsorption value, and improve the effect of soil remediation

Inactive Publication Date: 2016-05-25
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are generally problems such as low repair efficiency and high processing cost.

Method used

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  • Cadmium-lead compound contaminated soil repairing agent and application thereof
  • Cadmium-lead compound contaminated soil repairing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0038] Using the mixture of straw and calcium oxide as raw material, the mass ratio of straw and calcium oxide is 20:1, vacuum pyrolysis for 30min under the conditions of system pressure of 20kPa and pyrolysis temperature of 500°C, the pellets obtained by grinding Solid powder with a diameter of less than 3mm;

[0039] Described potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder are solid powders below 2mm respectively;

[0040] Weigh according to mass percentage:

[0041] Biochar 40%;

[0042] Potassium humate 15%;

[0043] 13X Molecular Sieve 15%;

[0044] Sodium Lauryl Sulfonate 15%;

[0045] Iron powder 15%;

[0046] Biochar, potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder were evenly mixed according to the above proportions to prepare a restoration agent.

preparation Embodiment 2

[0048] Using the mixture of straw and calcium oxide as raw material, the mass ratio of straw and calcium oxide is 20:1, vacuum pyrolysis for 30min under the conditions of system pressure of 20kPa and pyrolysis temperature of 500°C, the pellets obtained by grinding Solid powder with a diameter of less than 3mm;

[0049] Described potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder are solid powders below 2mm respectively;

[0050] Weigh according to mass percentage:

[0051] Biochar 50%;

[0052] Potassium humate 20%;

[0053] 13X Molecular Sieve 10%;

[0054] Sodium dodecyl sulfonate 10%;

[0055] Iron powder 10%;

[0056] Biochar, potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder were evenly mixed according to the above proportions to prepare a restoration agent.

preparation Embodiment 3

[0058] Using the mixture of straw and calcium oxide as raw material, the mass ratio of straw and calcium oxide is 20:1, vacuum pyrolysis for 30min under the conditions of system pressure of 20kPa and pyrolysis temperature of 500°C, the pellets obtained by grinding Solid powder with a diameter of less than 3mm;

[0059] Described potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder are solid powders below 2mm respectively;

[0060] Weigh according to mass percentage:

[0061] Biochar 30%;

[0062] Potassium humate 10%;

[0063] 13X Molecular Sieve 20%;

[0064] Sodium dodecyl sulfonate 20%;

[0065] Iron powder 20%;

[0066] Biochar, potassium humate, 13X molecular sieve, sodium dodecyl sulfonate, and iron powder were evenly mixed according to the above proportions to prepare a restoration agent.

[0067] Embodiment 1-3 gained restorative agent application specific implementation and technical effect:

[0068] 300 kg of cadmium-lead compound con...

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Abstract

The invention provides a cadmium-lead compound contaminated soil repairing agent which consists of the following ingredients in percentage by weight: 30-50% of biomass charcoal, 10-20% of potassium humate, 10-20% of a 13X molecular sieve, 10-20% of sodium dodecyl sulfate and 10-20% of iron powder. The ingredients give full play to a synergistic effect; by virtue of effects such as reduction, sedimentation, adsorption, improvement and PH value regulation, available heavy metals in soil are greatly reduced, and the prepared soil repairing agent has a favorable effect on repairing cadmium-lead compound contaminated soil. The repairing agent provided by the invention has the advantages of simple preparation method, feasibility and good treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of soil pollution remediation, in particular to a cadmium-lead compound polluted soil remediation agent and its application. technical background: [0002] Soil heavy metal pollution has gradually become the focus of public attention. According to the "National Soil Pollution Survey Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources in 2014, the overall situation of the national soil environment is not optimistic, the soil pollution in some areas is relatively serious, the quality of the soil environment of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. . Man-made activities such as industry, mining, agriculture, and high background values ​​of the soil environment are the main causes of soil pollution or exceeding standards. The total exceeding rate of national soil is 16.1%, of which the pr...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08A01B79/00C09K109/00C09K101/00
CPCA01B79/00B09C1/08C09K17/40C09K2101/00C09K2109/00
Inventor 周益辉
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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