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Method for preparing coal gangue based biological nanometer heavy metal soil remediation agent by utilizing coal gangue

A soil remediation agent, bio-nano technology, applied in soil conditioning materials, chemical instruments and methods, applications, etc., can solve problems such as unfavorable dispersion in soil, high cost, unfavorable soil remediation, etc., to reduce production costs, improve soil, Highly active effect

Inactive Publication Date: 2019-06-21
珠海三豫环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the existing sulfate-reducing bacteria are used for heavy metal soil remediation, it is not conducive to dispersing in the soil when used alone, and the cost of other carriers such as activated carbon and zeolite is high, which is not conducive to large-scale soil remediation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of method utilizing coal gangue to prepare coal gangue-based bionano heavy metal soil remediation agent, it comprises the following steps:

[0044] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0045] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill...

Embodiment 2

[0057] A kind of method utilizing coal gangue to prepare coal gangue-based bionano heavy metal soil remediation agent, it comprises the following steps:

[0058] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0059] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill...

Embodiment 3

[0071] A kind of method utilizing coal gangue to prepare coal gangue-based bionano heavy metal soil remediation agent, it comprises the following steps:

[0072] S1: Raw material testing, chemical composition and phase analysis of coal gangue raw materials, limestone or phosphogypsum raw materials, to obtain the chemical composition and content of coal gangue, limestone or phosphogypsum;

[0073] S2: Raw material crushing, the raw material is crushed by a crusher to obtain powder; further, the raw material crushing is divided into two steps, that is, coarse crushing and fine grinding. Yes, the jaw crusher is used for coarse crushing to obtain granular raw materials. The main purpose of coarse crushing is to crush the large coal gangue raw materials into granular raw materials, so that the coal gangue can enter the fine grinding equipment Second, the granular raw materials are sent to the fine grinding equipment for grinding. The preferred fine grinding equipment is a ball mill...

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Abstract

The invention discloses a method for preparing a coal gangue based biological nanometer heavy metal soil remediation agent by utilizing coal gangue. The method comprises the following steps: S1, material testing; S2, material crushing; S3, blending; S4, mixing; S5, forming; S6, thermal activation; S7, quenching; S8, drying; S9, crushing; S10, complex microbial inoculant immobilization; and S11, secondary drying. The method has the advantages that the powder activity is high after the heavy metal soil remediation agent is subjected to thermal activation, and cyano groups on the surface of a component can replace heavy metal ions to remove the heavy metal ions in soil; active silicate can react with the heavy metal ions in the soil, so that the heavy metal ions are combined with silicate andthen precipitate; mesoporous and micropores produced during thermal activation can serve as carriers and reaction containers for a complex microbial inoculant, sulfate reducting bacteria reduce sulfate radicals into sulfur ions, the sulfur ions are combined with the heavy metal ions to form a sulfide solid to be passivated, so that active heavy metal ions in the soil are removed.

Description

technical field [0001] The invention relates to the technical field of heavy metal soil remediation, in particular to a method for preparing a coal gangue-based bionano heavy metal soil remediation agent by using coal gangue. Background technique [0002] Coal gangue is a solid industrial waste produced during coal mining and processing, which contains a variety of mineral components. Among them, the content of kaolin and quartz accounts for more than 50%, and may also contain illite, chlorite, muscovite, feldspar, pyrite, siderite, hematite, calcite and other crystal phase minerals. Among them, kaolinite, illite, chlorite, muscovite, and feldspar belong to aluminous clay minerals, all of which have good adsorption properties. The main chemical components of coal gangue include AL2O3, SiO2, CaO, MgO, Fe2O3, K2O and Na2O. The contents of these chemical components fluctuate greatly depending on the geological age and region of the coal seam. [0003] However, in my country,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
Inventor 周建民
Owner 珠海三豫环保新材料科技有限公司
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