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Remediation agent and application for combined contaminated soil

A soil remediation agent and composite pollution technology, which is applied in composite contaminated soil remediation agent and application fields, can solve the problems of low remediation efficiency and high treatment cost, and achieve the effect of increasing adsorption capacity, high adsorption value and rich pores

Active Publication Date: 2016-05-18
深圳润康生态环境股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Remediation agent and application for combined contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0041] 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 particles obtained by grinding Solid powder with a diameter of less than 3mm;

[0042] Obtain solid powders of calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash with a particle size of less than 2mm;

[0043] Weigh according to mass percentage:

[0044] Biochar 40%;

[0045] Calcium Hydroxyphosphate 15%;

[0046] Potassium humate 15%;

[0047] α-cyclodextrin 15%;

[0048] Diatomaceous earth 10%;

[0049] Plant ash 5%.

[0050] Biomass charcoal, calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash are mixed according to the above ratio to prepare the restoration agent.

preparation Embodiment 2

[0052] 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 particles obtained by grinding Solid powder with a diameter of less than 3mm;

[0053] Obtain solid powders of calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash with a particle size of less than 2mm;

[0054] Weigh according to mass percentage:

[0055] Biochar 50%;

[0056] Calcium Hydroxyphosphate 20%;

[0057] Potassium humate 10%;

[0058] Alpha-cyclodextrin 10%;

[0059] Diatomaceous earth 5%;

[0060] Plant ash 5%.

[0061] Biomass charcoal, calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash are mixed according to the above ratio to prepare the restoration agent.

preparation Embodiment 3

[0063]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 particles obtained by grinding Solid powder with a diameter of less than 3mm;

[0064] Obtain solid powders of calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash with a particle size of less than 2mm;

[0065] Weigh according to mass percentage:

[0066] Biochar 30%;

[0067] Calcium Hydroxyphosphate 10%;

[0068] Potassium humate 20%;

[0069] α-cyclodextrin 20%;

[0070] Diatomaceous earth 10%;

[0071] Plant ash 10%.

[0072] Biomass charcoal, calcium hydroxyphosphate, potassium humate, α-cyclodextrin, diatomaceous earth, and plant ash are mixed according to the above ratio to prepare the restoration agent.

[0073] Embodiment 1-3 gained restorative agent application specific implementation and...

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Abstract

The invention provides a remediation agent and application for combined contaminated soil. The remediation agent is composed of, by weight, 30%-50% of biomass charcoal, 10%-20% of hydroxy calcium phosphate, 10%-20% of potassium humate, 10%-20% of alpha-cyclodextrin, 5%-10% of kieselguhr and 5%-10% of plant ash. The components give full play to the synergistic effect, through the effects of chelating, depositing, adsorbing, improving, PH value adjusting and the like, the content of available heavy metal in the soil is made to be decreased greatly, and the prepared soil remediation agent has a good effect during cadmium-lead-arsenic combined contaminated soil remedying. The remediation agent for the combined contaminated soil has the advantages that the preparation method is simple and practicable, and the remediation effect is good.

Description

Technical field: [0001] The invention relates to the technical field of soil pollution remediation, in particular to a composite polluted soil remediation agent and its application. technical background: [0002] Soil heavy metal pollution has gradually become the focus of public attention. [0003] 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 propo...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08C09K17/40C09K2101/00C09K2109/00
Inventor 周益辉
Owner 深圳润康生态环境股份有限公司
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