Cadmium-lead compound polluted farmland restoration agent and preparation method thereof
A compound pollution and repair agent technology, applied in the restoration of polluted soil, etc., can solve the problems of unknown ability of crops to absorb and transport heavy metals, high preparation cost, loss of repair agent, etc. The method is simple and the effect is stable
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Embodiment 1
[0028] At room temperature, mix 10 parts of AM fungus and 30 parts of iron-manganese compound evenly, so that AM fungus is coated with iron-manganese oxide, and the iron-manganese oxide coated with AM fungus is passed through a 100-mesh sieve to form a mixed uniformity coefficient of variation. More than 10% of the powdery mixture, then adding a total of 60 parts of biochar into the powdery mixture in 3 batches and mechanically stirring, and then passing through a 100-mesh sieve to obtain a cadmium-lead composite polluted farmland restoration agent. For the particles that cannot pass through the sieve, they are artificially crushed until they can pass through a 100 mesh sieve.
[0029] Mix this restoration agent with air-dried and sieved 2mm contaminated soil according to 2% mass ratio until the color density is uniform and maintain 80% of the field water holding capacity. Conduct soil culture experiments at room temperature at 25°C. The net weight of air-dried and sieved soil ...
Embodiment 2
[0031] At room temperature, mix 5 parts of AM fungus and 20 parts of iron-manganese compound evenly, so that AM fungus is coated with iron-manganese oxide, and the iron-manganese oxide coated with AM fungus is passed through a 100-mesh sieve to form a mixed uniformity coefficient of variation. More than 10% of the powdery mixture, then add a total of 90 parts of biochar to the powdery mixture in 3 batches and mechanically stir until the color density is uniform, and then pass through a 100-mesh sieve to obtain the control of cadmium-lead compound polluted farmland. For powder restoration agent, manually crush the particles that cannot pass through the 100-mesh sieve.
[0032]Mix this restoration agent with air-dried and sieved 2mm contaminated soil according to 2% mass ratio until the color density is uniform and maintain 80% of the field water holding capacity. Conduct soil culture experiments at room temperature at 25°C. The net weight of air-dried and sieved soil in each pot...
Embodiment 3
[0034] At room temperature, mix 20 parts of AM fungi and 40 parts of iron-manganese compounds evenly, so that AM fungi are coated with iron-manganese oxides, and the iron-manganese oxides coated with AM fungi are passed through a 100-mesh sieve to form a mixed uniformity coefficient of variation. More than 10% of the powder mixture, then add 45 parts of biochar to the powder mixture in 3 batches and mechanically stir until the color density is uniform, and then pass through a 100-mesh sieve to obtain a powder for the treatment of cadmium-lead compound polluted farmland Restorative. For the particles that cannot pass through the sieve, they are artificially crushed until they can pass through a 100-mesh sieve.
[0035] Mix this restoration agent with air-dried and 2mm sieved contaminated soil according to the mass ratio until the color density is uniform and maintain 80% of the field water holding capacity. Conduct soil culture experiments at room temperature at 25°C. The net w...
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