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Biological soil remediation agent and method for remediating soil

A technology of biological soil and remediation agent, applied in the field of biological soil remediation agent and soil remediation, can solve the problems of secondary pollution and slow effect of physical methods, and achieve the effect of reducing effectiveness and improving crop growth environment.

Inactive Publication Date: 2016-06-01
NANJING GAIA BIOLOGICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods are slow to take effect, while chemical methods are fast but easily cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First prepare the soil remediation agent, mix 50% clay carrier, 20% diatomaceous earth, 15% humic acid and 15% coconut shell-based biochar evenly, spray microbial liquid into it, press 30kg solid passivation agent (referring to the above Diatomaceous earth, humic acid and biochar mixture) spray 1L microbial liquid meter, said microbial liquid is composed of Brevibacillus and Streptomyces flavinus. The effective number of viable bacteria in the microbial liquid is greater than 200 million / ml.

[0020] Then take the polluted soil near the paper mill, and add lead-containing pollutants therein, so that the lead concentration in the soil is about 3900mg / kg, and finally the above-mentioned soil remediation agent is added in the polluted soil in a ratio of 2% by mass , add water to 60% of the saturated water holding capacity of the soil in the field, cover it with a film to prevent water loss, and open a number of vents on the film, inject air into the soil every 7 days, and ...

Embodiment 2

[0022] First prepare the soil remediation agent, mix 60% clay carrier, 20% diatomaceous earth, 10% humic acid and 10% coconut shell-based biochar evenly, spray microbial liquid into it, and spray 1L microorganism according to 20kg solid passivation agent Liquid meter, the so-called microbial liquid is composed of Brevibacillus and Streptomyces flavinus. The effective number of viable bacteria in the microbial liquid is greater than 200 million / ml.

[0023] Then take the polluted soil near the paper mill, and add lead-containing pollutants to it, so that the lead concentration in the soil is about 3900mg / kg, and finally the above-mentioned soil remediation agent is added to the polluted soil in a ratio of 5% by mass , add water to 70% of the saturated water holding capacity of the soil in the field, cover it with a film to prevent water loss, and open a number of vents on the film, inject air into the soil every 7 days, and replenish the lost water in time, after 60 days, it wi...

Embodiment 3

[0025] First prepare the soil remediation agent, mix 55% clay carrier, 25% diatomaceous earth, 10% humic acid and 10% coconut shell-based biochar evenly, spray microbial liquid into it, and spray 1L microorganism according to 30kg solid passivation agent Liquid meter, the so-called microbial liquid is composed of Brevibacillus and Streptomyces flavinus. The effective number of viable bacteria in the microbial liquid is greater than 200 million / ml.

[0026] Then take the contaminated soil near the paper mill, and add lead-containing pollutants to it, so that the lead concentration in the soil is about 3900mg / kg, and finally the above-mentioned soil remediation agent is added to the polluted soil in a ratio of 3% by mass , add water to 70% of the saturated water holding capacity of the soil in the field, cover it with a film to prevent water loss, and open a number of vents on the film, inject air into the soil every 7 days, and replenish the lost water in time, after 40 days th...

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Abstract

The invention discloses a biological soil remediation agent which is prepared by mixing a solid passivator and a microbic solution according to the volume-weight ratio of 1:(15-30) (L / kg). The solid passivator comprises the following ingredients in percent by mass: 50-60 percent of clay carrier, 15-30 percent of diatomite, 10-15 percent of humic acid and 10-20 percent of charcoal. The microbic solution comprises a non-spore forming bacterium and streptomyces microflavus. The biological soil remediation agent can be used for remediating a soil ecosystem, improving the crop growth environment, effectively passivating heavy metal pollutants, such as lead, and reducing the availability for plants.

Description

technical field [0001] The invention relates to a biological soil restoration agent and a soil restoration method thereof. Background technique [0002] With the rapid development of industry and the continuous increase of agricultural input intensity, a large number of refractory organic pollutants and heavy metal pollutants have entered the soil environment, which has caused serious soil pollution, especially the heavy metals in the soil can be absorbed by plants and enter the food chain. And then constitute a serious threat to human health. The intrusion of various pollutants leads to the reduction of the types and quantities of soil microorganisms, the destruction of soil structure and ecosystem, the decline of crop quality, and the increase of pests and diseases. This has become a worldwide problem that has been widely concerned. [0003] At present, the commonly used soil pollution control methods include physical methods such as leaching and adsorption and fixation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 耿传超
Owner NANJING GAIA BIOLOGICAL ENG CO LTD
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