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Application of argillaceous shale and method for repairing lead and other heavy metal contaminated soil by using argillaceous shale

A muddy shale and polluted soil technology, applied in the restoration, application, soil conditioning materials and other directions of polluted soil, can solve the problems of long bioremediation time, small scope of physical restoration, chemical restoration of secondary pollution, etc. Good compatibility with heavy metals, simple and diverse modification methods, and simple repair operations

Active Publication Date: 2020-06-19
陕西地建土地工程技术研究院有限责任公司
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  • Abstract
  • Description
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Problems solved by technology

[0005] In order to solve the deficiencies in the existing lead and other heavy metal contaminated soil remediation and treatment methods, the scope of physical remediation is small, the time of biological remediation is long, and chemical remediation is easy to cause secondary pollution. The invention provides the application of argillaceous shale and its remediation Methods of polluting soil with heavy metals such as lead

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  • Application of argillaceous shale and method for repairing lead and other heavy metal contaminated soil by using argillaceous shale
  • Application of argillaceous shale and method for repairing lead and other heavy metal contaminated soil by using argillaceous shale
  • Application of argillaceous shale and method for repairing lead and other heavy metal contaminated soil by using argillaceous shale

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Firstly, the ratio test is carried out to screen the optimal particle size of the applied argillaceous shale:

[0037] The heavy metal in the polluted soil is Pb(II), but not limited to this heavy metal;

[0038] The argillaceous shale needs to be dried, ground and sieved, and the specific steps are as follows:

[0039] (1) The temperature in the oven is adjusted to 200°C, and the natural argillaceous shale and the field cultivation layer soil for testing are baked to constant weight;

[0040] (2) Grind the dried argillaceous shale and the soil of the field cultivation layer for testing, and pass through 10 mesh, 20 mesh, and 40 mesh nylon drying respectively after grinding;

[0041] (3) The pH of the above-mentioned argillaceous shale is 8.29, and the pH of the field plowing layer soil for testing is 8.14; the mineral composition co...

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Abstract

The invention provides application of argillaceous shale and a method for remediating lead and other heavy metal contaminated soil by using the argillaceous shale, and solves the problems of small application range of physical remediation, long time of biological remediation and high possibility of secondary pollution caused by chemical remediation in an existing lead and other heavy metal contaminated soil treatment method. Deep research shows that the argillaceous shale has the purpose of repairing lead and other heavy metal contaminated soil and can be used for preparing a heavy metal passivator for repairing soil polluted by heavy metals. The method for repairing lead and other heavy metal contaminated soil by using the argillaceous shale is simple and convenient to operate, the argillaceous shale only needs to be added into the polluted soil and is uniformly mixed, and the dosage of the argillaceous shale is 40-50kg / mu.

Description

technical field [0001] The invention belongs to the technical field of remediation and treatment of heavy metal-contaminated soil, and in particular relates to the application of argillaceous shale and a method for remediating heavy metal-contaminated soil such as lead. Background technique [0002] Lead and other heavy metals pollute the soil with strong concealment, non-degradability, hysteresis and accumulation, which lead to changes in the physical and chemical properties of the soil itself and serious degradation of soil quality. It not only affects the quality and output of agricultural by-products, but also continuously enriches in plants through the soil, and finally enters the human body or animals through the food chain, causing serious harm to human or animal health and the ecological environment. [0003] How to remediate soil contaminated by heavy metals such as lead has become a research hotspot in the fields of agriculture, ecology and environmental science. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/40C09K101/00
CPCB09C1/08C09K17/40B09C2101/00C09K2101/00
Inventor 张宝强孙婴婴魏样卢楠闫波
Owner 陕西地建土地工程技术研究院有限责任公司
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