Preparation method of green restoration material for heavy metal polluted soil
A technology of contaminated soil and repair materials, applied in the field of heavy metal contaminated soil repair, to achieve the effect of improving the repair effect, wide application, and increasing the usable value
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Embodiment 1
[0024] A preparation method of a green restoration material for heavy metal polluted soil, the operation process is as follows:
[0025] Wash balsam pear vine, a plant fibrous waste that has been decomposed for 72 hours and air-dried, with tap water for 5 times, and then with deionized water for 2 times. Bitter gourd vines are pyrolyzed in a muffle furnace. The pyrolysis process includes a heating section, a holding section and a cooling section. The heating section heats up to 450°C at 10°C / min; During the whole pyrolysis process, nitrogen gas is kept flowing as the carrier gas, and the flow rate of the carrier gas is 150ml / min; then the product that has been pyrolyzed and naturally cooled is soaked in 0.4mol / L hydrochloric acid for 12h, wherein the mass ratio of the product to the hydrochloric acid solution 1:500; rinse the product soaked in hydrochloric acid 4 times with deionized water, put it into boiled deionized water until neutral pH = 7, and dry it at 105°C for 12 hou...
Embodiment 2
[0027] A method for preparing a green repair material for heavy metal polluted soil, the operation steps are as follows:
[0028] The plant fibrous waste pumpkin vines that were decomposed for 72 hours and air-dried were washed 6 times with tap water, then washed 3 times with deionized water, dried naturally at 105°C for 24 hours, shortened to 1 cm, and set aside. Put the shortened pumpkin vines in a muffle furnace for pyrolysis. The pyrolysis process includes a heating section, a holding section and a cooling section. The heating section heats up to 500°C at 15°C / min; the holding section is kept at 500°C for 60 minutes; Natural cooling is used in the cooling section, and argon gas is maintained as a carrier gas during the entire pyrolysis process, and the flow rate of the carrier gas is 130ml / min. Take the product that has been pyrolyzed and cooled naturally and soak it in 0.5mol / L hydrochloric acid for 12h, wherein the mass ratio of the product to the hydrochloric acid solut...
Embodiment 3
[0030] The plant fibrous waste loofah vines that were decomposed for 72 hours and air-dried were washed 6 times with tap water, and then washed 3 times with deionized water. After natural air-drying, they were dried at 105°C for 24 hours, shortened to 1 cm, and set aside. Put the shortened pumpkin vines in a muffle furnace for pyrolysis. The pyrolysis process includes a heating section, a holding section and a cooling section. The heating section heats up to 550°C at 15°C / min; the holding section is kept at 550°C for 60 minutes; In the cooling section, natural cooling is used, and nitrogen gas is kept fed as the carrier gas during the whole pyrolysis process, and the flow rate of the carrier gas is 150ml / min. Take the product that has been pyrolyzed and cooled naturally and soak it in 0.6mol / L hydrochloric acid for 12h, wherein the mass ratio of the product to the hydrochloric acid solution is 1:500. Rinse the product soaked in hydrochloric acid four times with deionized water...
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Abstract
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