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Cadmium-lead-arsenic compound contaminated soil remediation agent and application thereof

A soil remediation agent and a technology for compound pollution, which are applied in the field of cadmium-lead-arsenic compound-contaminated soil remediation agents, can solve the problems of low remediation efficiency and high treatment cost, and achieve the effects of low cost, high adsorption value, and improved soil remediation effect.

Inactive Publication Date: 2016-07-13
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • 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-arsenic compound contaminated soil remediation agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0039] 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;

[0040] Obtain diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, starch solids with a particle size of less than 2mm

[0041] body powder;

[0042] Weigh according to mass percentage:

[0043] Biochar 40%;

[0044] Diammonium hydrogen phosphate 15%;

[0045] Trisodium Phosphate 15%;

[0046] Sodium Lauryl Sulfonate 15%;

[0047] Starch 15%;

[0048] Biochar, diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, and starch are mixed according to the above ratio to prepare the restoration agent.

preparation Embodiment 2

[0050] 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;

[0051] Obtain diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, starch solids with a particle size of less than 2mm

[0052] body powder;

[0053] Weigh according to mass percentage:

[0054] Biochar 50%;

[0055] Diammonium hydrogen phosphate 20%;

[0056] Trisodium Phosphate 10%;

[0057] Sodium dodecyl sulfonate 10%;

[0058] Starch 10%;

[0059] Biochar, diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, and starch are mixed according to the above ratio to prepare the restoration agent.

[0060] Biomass charcoal, polyacrylamide, starch, and sodium bentonite are mixed according to the above ratio, and then ...

preparation Embodiment 3

[0062] 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;

[0063] Obtain diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, starch solids with a particle size of less than 2mm

[0064] body powder;

[0065] Weigh according to mass percentage:

[0066] Biochar 30%;

[0067] Diammonium hydrogen phosphate 10%;

[0068] Trisodium Phosphate 20%;

[0069] Sodium dodecyl sulfonate 20%;

[0070] Starch 20%;

[0071] Biochar, diammonium hydrogen phosphate, trisodium phosphate, sodium dodecylsulfonate, and starch are mixed according to the above ratio to prepare the restoration agent.

[0072] Embodiment 1-3 gained restorative agent application specific implementation and technical effect:

[0073] 300 kg...

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Abstract

The invention provides a cadmium-lead-arsenic compound contaminated soil remediation agent, prepared from the following components by a weight ratio: 30-50% of biomass charcoal, 10-20% of diammonium hydrogen phosphate, 10-20% of trisodium phosphate, 10-20% of sodium dodecyl sulfate and 10-20% of starch; the components give full play to the synergy, and effective state of cadmium, lead and arsenic in soil are greatly reduced by carrying out chelation, precipitation, absorption, improvement, PH value adjustment and the like on the components; the prepared soil remediation agent has a good effect in remediation of the cadmium-lead-arsenic compound contaminated soil; the remediation agent provided by the invention has the advantages of being simple and feasible in preparation method as well as good in treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of soil pollution remediation, in particular to a cadmium, lead and arsenic compound polluted soil remediation agent and its application. Background technique: [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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCC09K17/40B09C1/08
Inventor 周益辉
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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