Method for preparing magnetic microbe immobilizing material for soil pollution repair and application thereof
A magnetic microorganism and soil pollution technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve problems such as secondary pollution, difficulty in controlling the particle size of immobilized materials, and adverse effects of immobilized microorganism growth , to achieve the effect of strong adsorption capacity
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[0014] Example 1
[0015] 1) After air drying, the waste rice straw materials are crushed and passed through a 60-mesh sieve;
[0016] 2) The crushed straw particles are added to the 0.1mol / L iron salt solution, and 4mol / L NaOH solution is added dropwise to the solution pH 9-10 under magnetic stirring. The solid precipitate is separated by filtration, dried, and carbonized with a lower limit of oxygen at 300°C for 2 hours to obtain a carrier material;
[0017] 3) Connect the white-rot fungus suspension at a solid-liquid ratio of 2mL / g, and add sodium alginate (1-2g sodium alginate / 100mL water) and stir well;
[0018] 4) Add the above mixed suspension dropwise to 2% CaCl by mass 2 The solution is made into particles (1-20mm in diameter) and proliferated for 12 hours to obtain magnetically immobilized microbial active particles MIM-1.
[0019] 5) Add the prepared microbial immobilized particles to the soil contaminated by polycyclic aromatic hydrocarbons at a rate of 10 tons per hectare ...
Example Embodiment
[0021] Example 2
[0022] 1) The sawdust waste after air drying is crushed and passed through a 20-mesh sieve;
[0023] 2) The crushed sawdust particles are added to the 0.1 mol / L iron salt solution, and the 2 mol / L NaOH solution is added dropwise to the solution pH 9-10 under magnetic stirring. The solid precipitate is separated by filtration, dried, and carbonized with the lower limit oxygen at 400°C for 1 hour to prepare the carrier material MIM-2;
[0024] 3) Connect the white rot fungus suspension at a solid-liquid ratio of 1mL / G, and add sodium alginate (1-2g sodium alginate / 100mL water) and stir well;
[0025] 4) Add the above mixed suspension dropwise to 2% CaCl by mass 2 The solution is made into particles (1-20mm in diameter) and proliferated for 24 hours to obtain magnetically immobilized microbial active particles.
[0026] 5) Add the prepared microbial immobilized particles to the soil contaminated by polycyclic aromatic hydrocarbons at a rate of 20 tons per hectare of soi...
Example Embodiment
[0028] Example 3
[0029] 1) After air drying, the waste peels are crushed and passed through a 100-mesh sieve;
[0030] 2) The crushed straw particles are added to the 0.1mol / L iron salt solution, and 3mol / L NaOH solution is added dropwise to the solution pH 9-10 under magnetic stirring. The solid precipitate is separated by filtration, dried, and carbonized with a lower limit oxygen at 250°C for 3 hours to obtain a carrier material;
[0031] 3) Connect the mixed suspension of white rot fungi and bacteria according to the solid-liquid ratio of 5mL / g, and add sodium alginate (1-2g sodium alginate / 100mL water) and stir well;
[0032] 4) Add the above mixed suspension dropwise to 3% CaCl by mass 2 The solution is made into particles (1-20mm in diameter) and proliferated for 12 hours to obtain magnetically immobilized microbial active particles MIM-3.
[0033] 5) Add magnetically immobilized microbial active particles according to a 2% dosage ratio, and try to mix them thoroughly with the...
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