In-situ repair method and system for heavy meal cadmium and polycyclic aromatic hydrocarbon polluted farmland soil
A polycyclic aromatic hydrocarbon and polluted soil technology, applied in the field of soil remediation of polluted farmland, can solve the problems of high cost, low efficiency, secondary pollution, etc., and achieve the effects of low cost, simple process, and no secondary pollution.
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Embodiment 1
[0034] According to the ratio of 1g glucose, 10g porous foam iron fine particles and 40ml water, first dissolve glucose in water to make glucose solution, then drop into the glucose solution with porous foam iron fine particles with a particle size of 200-500 microns to prepare Mixed solution; put the above mixed solution in a hydrothermal reaction kettle, heat at 120°C for 6 hours (the pressure in the hydrothermal reaction kettle is 1.0-2.0MPa), after the reaction, take out the porous foam iron fine particles and wash them with deionized water After drying, the fine particles of carbon-coated porous foam iron are obtained.
[0035] The charcoal-coated porous foam iron fine particles, sodium peroxide and sodium phytate powder are uniformly mixed in a mass ratio of 65:15:20 to form a mixture.
[0036] Detect the content of cadmium and polycyclic aromatic hydrocarbons in the polluted soil. When the cadmium content in the polluted soil is less than or equal to 3.0mg / kg, sprinkle ...
Embodiment 2
[0039] According to the ratio of 2.5g glucose, 5g porous foam iron fine particles and 40ml water, glucose is dissolved in water earlier to make glucose solution, then drop into the glucose solution with a particle size of 200-500 micron porous foam iron fine particles to prepare Mixed solution: put the above mixed solution in a hydrothermal reaction kettle, heat at 160°C for 4 hours (the pressure in the hydrothermal reaction kettle is 1.0-2.0MPa), after the reaction, take out the porous foam iron fine particles and wash them with deionized water After drying, the fine particles of carbon-coated porous foam iron are obtained.
[0040] The charcoal-coated porous foam iron fine particles, potassium peroxide and sodium phytate powder are uniformly mixed in a mass ratio of 85:5:10 to form a mixture.
[0041] Detect the content of cadmium and polycyclic aromatic hydrocarbons in the polluted soil. When the cadmium content in the polluted soil is less than or equal to 3.0mg / kg, sprink...
Embodiment 3
[0044] According to the ratio of 2g glucose, 15g porous foam iron fine particles and 40ml water, first dissolve glucose in water to make glucose solution, then drop into the glucose solution with a particle size of 200-500 micron porous foam iron fine particles to form a mixture liquid; put the above mixed solution in a hydrothermal reaction kettle, heat it at 180°C for 2 hours (the pressure in the hydrothermal reaction kettle is 1.0-2.0MPa), after the reaction, take out the porous foam iron fine particles, wash them with deionized water After drying, the fine particles of carbon-coated porous foam iron can be obtained.
[0045] The charcoal-coated porous foam iron fine particles, sodium peroxide and sodium phytate powder are uniformly mixed in a mass ratio of 75:10:15 to form a mixture.
[0046] Detect the content of cadmium and polycyclic aromatic hydrocarbons in the polluted soil. When the cadmium content in the polluted soil is less than or equal to 3.0mg / kg, sprinkle 50g ...
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