Repair agent for fluorine polluted soil and repair method for fluorine polluted soil
A technology of polluted soil and remediation methods, which is applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc. Harmful, activity-reducing effects
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Embodiment 1
[0028] Weigh 25g of peat, dry it naturally, and grind it through a 60-mesh sieve; add the peat to 150mL of phosphoric acid solution with a concentration of 10mol / L, and heat it in a boiling water bath for 2h; filter the solution obtained by suction, and use deionized water to filter the Wash the obtained solid until the solution is neutral; dry the filtered solid in an oven at 105°C, after drying, grind the obtained solid through a 60-mesh sieve; weigh 20g of the solid powder obtained in the previous step, and add it to 5g / L 200mL of polyaluminum chloride solution, stirred and reacted at 80°C for 2h; the solution obtained from the reaction was subjected to suction filtration, and the solid obtained by suction filtration was dried in an oven at 105°C. After drying, the obtained solid was ground and passed through a 60-mesh sieve ( That is, the particle size of the particles is less than or equal to 250 μm) to obtain modified peat. Phosphoric acid modification will attach part o...
Embodiment 2
[0031] Weigh 25g of peat, dry it naturally, and grind it through a 60-mesh sieve; add the peat to 150mL of phosphoric acid solution with a concentration of 8mol / L, and heat it in a boiling water bath for 2h; filter the solution obtained from the reaction, and filter it with deionized water. Wash the obtained solid until the solution is neutral; dry the filtered solid in an oven at 105°C, after drying, grind the obtained solid through a 60-mesh sieve; weigh 20g of the solid powder obtained in the previous step, and add it to 5g / L 200mL of polyaluminum chloride solution, stirred and reacted at 80°C for 2h; the solution obtained from the reaction was suction filtered, and the solid obtained by suction filtration was dried in an oven at 105°C. After drying, the obtained solid was ground and passed through a 60-mesh sieve to obtain Modified peat.
[0032] Weigh 10g of the above-prepared peat, 10g of calcium magnesium phosphate fertilizer, and 80g of calcium carbonate, mix and grind...
Embodiment 3
[0034] Weigh 40g of peat, dry it naturally, and grind it through a 60-mesh sieve; add peat to 200mL of phosphoric acid solution with a concentration of 10mol / L, and heat it in a boiling water bath for 2h; filter the solution obtained by suction, and filter it with deionized water. Wash the obtained solid until the solution is neutral; dry the filtered solid in an oven at 105°C, after drying, grind the obtained solid through a 60-mesh sieve; weigh 30g of the solid powder obtained in the previous step, and add it to 5g / L 200mL of polyaluminum chloride solution, stirred and reacted at 80°C for 2h; the solution obtained from the reaction was suction filtered, and the solid obtained by suction filtration was dried in an oven at 105°C. After drying, the obtained solid was ground and passed through a 60-mesh sieve to obtain Modified peat.
[0035] Weigh 25g of peat, 25g of calcium magnesium phosphate fertilizer, and 50g of calcium hydroxide prepared above, mix and grind, pass through...
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