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Arsenic contaminated soil remediation method and application

A technology for arsenic pollution and soil, applied in the restoration of contaminated soil, methods based on microorganisms, biochemical equipment and methods, etc., can solve the problems of super accumulation performance degradation, loss of repair function, poor repair effect, etc., and achieve simple technology Easy to implement, low cost, and conducive to the effect of ecological sustainable development

Inactive Publication Date: 2018-12-07
南京怡可帮生态环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these plants are shade plants, which grow in wild wilderness for a long time and are used for arsenic cultivation in large-scale farmland soil. After asexual reproduction, the performance of hyperaccumulation is greatly degraded, and the repair function is lost

Method used

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  • Arsenic contaminated soil remediation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Add 60 grams of starch, 70 grams of bean cake powder, 10 grams of calcium carbonate powder, 35 grams of dipotassium hydrogen phosphate, 35 grams of potassium dihydrogen phosphate, 15 grams of ferrous sulfate, and 15 grams of magnesium sulfate in a 10-liter bioreactor , 7000 milliliters of water, stirring, after all mixing, start the heating steam pipe, heat the mixed solution, keep 40 minutes at 126°C under 0.1Mpa, after sterilization, cool to 30°C to inoculate 0.5% (mass / volume) Flavobacterium, Start the agitator, the agitator rotating speed is 50 rpm, the ventilation rate is 0.5 liter of air / liter of liquid (volume / volume / minute), and the constant temperature mixed culture is 48 hours, and the fermentation is finished, and the tank is put. In the same way, inoculate 0.5% (W / V) purple sulfur bacteria and Aeromonas intermedia respectively in the same liquid fermentation medium, start the agitator, the agitator rotating speed is 50 rev / min, and the ventilation rate is ...

Embodiment 2

[0024] 1. Add 250 grams of starch, 170 grams of bean cake powder, 25 grams of calcium carbonate powder, 60 grams of dipotassium hydrogen phosphate, 50 grams of potassium dihydrogen phosphate, 30 grams of ferrous sulfate, and 30 grams of magnesium sulfate in a 10-liter bioreactor , 7000 milliliters of water, stirring, after all mixing, start the heating steam pipe, heat the mixed solution, keep 40 minutes at 126°C under 0.1Mpa, after sterilization, cool to 30°C to inoculate 4% (mass / volume) Flavobacterium, Start the agitator, the agitator rotating speed is 95 rpm, the ventilation rate is 0.8 liters of air / liter of liquid (volume / volume), and the constant temperature mixed culture is 38 hours, and the fermentation is finished, and the tank is put. In the same way, inoculate 4% (mass / volume) purple sulfur bacteria and Aeromonas intermedia respectively in the same liquid fermentation medium, start the agitator, the agitator rotating speed is 95 rpm, and the ventilation rate is 0.8 ...

Embodiment 3

[0028] 1. Add 600 grams of starch, 240 grams of bean cake powder, 60 grams of calcium carbonate powder, 110 grams of dipotassium hydrogen phosphate, 110 grams of potassium dihydrogen phosphate, 40 grams of ferrous sulfate, and 60 grams of magnesium sulfate in a 10-liter bioreactor , 7000 milliliters of water, stirring, after all the mixing, start the heating steam pipe, heat the mixed solution, keep it at 126°C under 0.1Mpa for 40 minutes, after the sterilization is completed, cool to 30°C and inoculate 8% (mass / volume) malodorous fake form Bacillus, start the agitator, the agitator speed is 120 rpm, the ventilation rate is 1 liter of air / liter of liquid (volume / volume / minute), and the constant temperature mixed culture is 24 hours, and the fermentation is finished, and the tank is put. In the same way, inoculate 8% (mass / volume) of Alcaligenes faecalis and Flavobacterium respectively in the same liquid fermentation medium, start the agitator, the agitator rotating speed is 120...

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Abstract

The invention discloses an arsenic contaminated soil remediation method and application, and belongs to the field of ecological environmental protection. The technology is achieved through the following steps that starch, bean cakes, monopotassium phosphate, dipotassium phosphate, calcium carbonate, ferrous sulfate and the like are added into a bioreactor, then, the sufficient amount of water is added into the bioreactor, stirring, uniform mixing, heating sterilization and cooling are conducted in sequence, flavobacterium and other bacterial strains are inoculated, thus, a mixture is obtained,then subjected to fermentation, cooling, blending and filling and applied into soil, natural cultivation is conducted for 8-20 months, arsenic in the soil can be continuously converted into volatilegas, the volatile gas volatilizes into air from the soil, accordingly, the arsenic in the soil is removed, and arsenic pollution to the soil and underground water is eliminated. The soil environment is protected, the soil production and ecological functions are protected, the groundwater environment is protected, and the food safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of ecological environment protection, and in particular relates to a soil arsenic pollution treatment method and its application. Background technique [0002] Arsenic is a very toxic environmental pollutant. The arsenic in natural soil mainly comes from the soil-forming parent material. During the formation of soil by rock weathering, the content of arsenic (relative to the soil-forming parent material) was significantly enriched. Human activities such as mining, smelting, sewage irrigation, fertilization, application of pesticides and wood preservatives may cause soil arsenic pollution. Excessive accumulation of arsenic in the soil will reduce crop yield and quality, and may cause water and air pollution, and can enter the human body through food chains and water bodies. Recent studies have shown that low levels of arsenic can seriously endanger human health. [0003] In 2016, the "Soil Pollution Prevention and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10C12N1/20C12R1/01C12R1/20
CPCB09C1/10B09C2101/00C12N1/20
Inventor 吴洪生
Owner 南京怡可帮生态环境科技有限公司