Microbiological treatment method for lead and cadmium polluted soil foundation
A microbial treatment and soil foundation technology, applied in the restoration of polluted soil, etc., can solve the problems that the mechanical properties of the site soil do not play a role, and the requirements of environmental treatment and foundation reinforcement cannot be taken into account at the same time, so as to achieve a short construction period, high tolerance Strong force and uniform distribution of bacteria
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Embodiment 1
[0021] In this example, a kind of microbial treatment method of lead, cadmium contaminated soil foundation is used for processing lead, cadmium ion polluted powder soil foundation, and this method comprises the following steps:
[0022] a. Extract soil samples from stratum 1 to be treated for TCLP toxicity leaching test. The leached amounts of lead and cadmium ions in stratum 1 to be treated are measured to be 10.2 mg / L and 8.8 mg / L respectively. Drill holes and lay out the grouting pipe 2. The grouting holes for placing the grouting pipe 2 are arranged in a plum blossom shape on the plane, and the hole distance is 1.5m;
[0023] b. prepare microbial growth-promoting liquid 3, use grouting pump 4 to inject microbial growth-promoting liquid 3 through grouting pipe 2 in the stratum 1 to be treated to improve the resistance of microorganisms to environmental toxicity, and then promote their mass reproduction, the microbial growth-promoting liquid 3 The pH is 7.0, the dissolved ox...
Embodiment 2
[0028] In this example, a microbial treatment method for lead and cadmium contaminated soil foundations is used to treat lead and cadmium ion-contaminated clay foundations. The method includes the following steps:
[0029] a. Extract soil samples from the stratum 1 to be treated for TCLP toxicity leaching test. The leached amounts of lead and cadmium ions in the untreated foundation are measured to be 8.6mg / L and 7.5mg / L respectively, and then drill holes on the stratum 1 to be treated And lay out the grouting pipe 2, the grouting holes where the grouting pipe 2 is placed are arranged in a triangle on the plane, and the hole distance is 1.5m;
[0030] b. prepare microbial growth-promoting liquid 3, use grouting pump 4 to inject microbial growth-promoting liquid 3 through grouting pipe 2 in the stratum 1 to be treated to improve the resistance of microorganisms to environmental toxicity, and then promote their mass reproduction, the microbial growth-promoting liquid 3 The pH is...
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