Cadmium-contaminated soil composite microbial remediation agent and technical method for remediation while production
A technology for cadmium-contaminated soil and compound microorganisms is applied in the field of compound microbial remediation agent for cadmium-contaminated soil and the field of remediation while production, which can solve the problems that the remediation planting method is difficult to take into account the economic benefits, reduce the remediation effect, and the risk is unknown, so as to achieve fast green Removal, Enhanced Quick Removal, Strong Tolerance
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reference example 1
[0099] Reference Example 1 Si / Fe Composite Cadmium Contaminated Soil Improver
[0100] 1mol / L of Fe(NO 3 ) 3 solution and 4mol / L NaOH solution with Fe(NO 3 ) 3 After mixing and reacting with NaOH in a molar ratio of 1:0.5, the hydroxyl iron solution is obtained. According to the mass ratio of hydroxyl iron and diatomaceous earth as 3:1, diatomaceous earth is added to the hydroxyl iron solution and mixed, and stirred until it is muddy. Baking at 110°C for 48 hours to obtain Si / Fe composite cadmium-contaminated soil improver.
reference example 2
[0101] Reference example 2 C / Fe compound cadmium polluted soil amendment
[0102] FeSO 4 ·7H 2 O and wetland plant straw biochar are added to water at a molar mass ratio of 0.5:1:100mol / g / g, nitrogen gas is introduced, stirred, and then absolute ethanol (volume ratio to water is 0.5:1) is added, and the stirring is continued. Then add grape seed extract (volume ratio of water to 0.3:1), continue to stir until the solution turns black, vacuum filter, wash the filter residue with water and absolute ethanol four times successively, and dry it in vacuum at 80°C for 24 hours , to obtain a C / Fe composite cadmium-contaminated soil improver; the preparation method of the grape seed extract is as follows: the grape seed is placed in water with a mass-volume ratio of 4:100 g / mL, and heated in a sealed water bath for 1.0 h at 80° C. , filtered to obtain grape seed extract.
[0103] Cadmium Contaminated Soil Composite Microbial Restoration Agent Example 1
[0104] Cadmium-contaminated...
Embodiment 1
[0113] The planting period of rice-sorghum-sedum sedum is seamlessly connected, and divided into production period and repair period to form a closed cycle repair cycle:
[0114] (1) Production period:
[0115] Soil improvement and rice planting: On April 3, 2018, on the cadmium-contaminated plot, the plot was plowed, and the soil moisture content was kept at 85% of the field water capacity after plowing. Plowing rate ≥ 3 times / m, vegetation coverage rate ≥ 60% below the surface, vertical and back-fading rate ≤ 5%, plowing depth of 15cm, build ridges, start irrigation and drainage ditches;
[0116] On April 4, 2018, 200 kg / mu of Si / Fe compound cadmium-contaminated soil amendment and 30 kg / mu of base fertilizer (compound fertilizer with a mass ratio of N:P:K of 15:15:15) were applied;
[0117] On April 10, 2018, rice seedlings of Xiangzaoxian No. 32 were manually transplanted using conventional water seedling cultivation. The transplanting density was 0.933 million holes / mu, 5...
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