Method for removing heavy metal in different forms in polluted soil through acidophilic bacteria leaching

A technology for contaminated soil and heavy metals, applied in the field of microbial remediation, can solve the problems of slow remediation process, low treatment efficiency, poor environmental adaptability, etc., and achieve the effect of low operating cost and simple operation
CN110523770AInactive Publication Date: 2019-12-03SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Publication Date
2019-12-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for removing heavy metal in different forms in polluted soil through acidophilic bacteria leaching. The method comprises the following steps that firstly, strains areacclimatized, then the acclimatized strains are inoculated into a culture solution containing the heavy metal highly-polluted soil, leaching culture is conducted under certain parameter conditions, and by changing the occurrence form of the heavy metal in the soil, the heavy metal highly-polluted soil is repaired. The method utilizes acidithiobacillus ferrooxidans to remove the heavy metal in different forms in the heavy metal highly-polluted soil, and has the advantages that operation is easy, the cost is low, the repairing effect is good, a bacteria solution can be secondarily utilized, andsecondary pollution to the environment is avoided, the good removing effect on zinc, chromium, copper and nickel with the high content in the soil is achieved, and the problems that in an existing heavy metal polluted soil repairing technology, the strains only have tolerance and leaching capability for single heavy metal, heavy metal tolerance is poor, reducing of toxicity of the heavy metal is small, the operation cost is high, and the environment condition requirements are harsh are solved.
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Description

technical field

[0001] The invention belongs to the technical field of microbial remediation of polluted environment, and relates to a method for removing heavy metals in different forms in polluted soil by acidophilic bacteria leaching. Background technique

[0002] Soil is the material basis for human survival and the basic guarantee for social development. With the rapid development of science and information technology and rapid economic growth, the rapid upgrading of electronic products has produced a huge amount of electronic waste. E-waste is an untapped "secondary resource", known as "urban mine", which contains a large amount of precious metals and reusable devices. However, for a long time, my country's electronic dismantling and processing technology has been relatively backward, resulting in the release of a large amount of heavy metals and persistent organic pollutants into the environment, causing serious pollution to the local soil, water, and atmospheric env...

Claims

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