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Calcite passivator and application thereof

A technology of calcite and passivating agent, applied in application, other chemical processes, chemical instruments and methods, etc., to achieve the effect of inhibiting biological activity and migration

Pending Publication Date: 2021-11-16
河南省地质矿产勘查开发局第一地质矿产调查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the field test of passivating agent combined with calcite, slaked lime, zeolite powder and biochar at home and abroad.

Method used

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  • Calcite passivator and application thereof
  • Calcite passivator and application thereof
  • Calcite passivator and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Calcite and slaked lime were mixed with a mixer at a mass ratio of 10:1 and packed into bags to obtain a calcite passivation agent, and then the calcite passivation agent was sprinkled on the soil surface of the corn field at an application rate of 1650 kg per mu.

Embodiment 2

[0062] Calcite and zeolite powder were mixed with a mixer at a mass ratio of 10:1 and packed into bags to obtain a calcite passivator, and then the calcite passivator was sprinkled on the soil surface of the corn field at an application rate of 1650 kg per mu.

Embodiment 3

[0064] Calcite and biochar were mixed with a mixer at a mass ratio of 10:1, and bagged to obtain a calcite passivation agent, and then the calcite passivation agent was sprinkled on the soil surface of the corn field at an application rate of 1650 kg per mu.

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PUM

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Abstract

The invention belongs to the technical field of passivators, and provides a calcite passivator and application thereof. The calcite passivator comprises a basic component calcite and an auxiliary component, wherein the auxiliary component comprises one or more of slaked lime, zeolite powder and biochar; and the mass ratio of the calcite in the calcite passivator is (7 / 9)-(11 / 12). The calcite passivator provided by the invention can obviously reduce the content of Cd and Pb in the DTPA leaching state and the ion exchange state in soil, and can effectively inhibit the biological activity and mobility of Cd and Pb in the soil. The synergistic remediation mode of the calcite-based compounded passivator and the low-accumulation corn variety has the advantages of high efficiency, stability and economy, and has important significance on establishment of a northern mode for remediation of the medium-alkaline soil heavy metal polluted farmland.

Description

technical field [0001] The invention relates to the technical field of passivating agents, in particular to a calcite passivating agent and its application. Background technique [0002] At present, the overall situation of soil pollution in my country's cultivated land is not optimistic, and local problems are prominent, especially heavy metal pollution, which has posed a serious threat to the quality of agricultural products in some areas. In recent years, there have been many studies on single technologies such as lime adjustment, variety adjustment, foliage regulation, optimized fertilization, water regulation, in-situ passivation, microbial remediation, and plant extraction on heavy metal-contaminated farmland, while research reports on comprehensive treatment technologies are less. few. Due to the complex and changeable field environmental factors and the complexity of soil pollution, it is often difficult for a single measure to ensure that the content of pollutants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C09K17/08B09C1/00C09K101/00C09K109/00
CPCC09K17/06C09K17/08B09C1/00C09K2101/00C09K2109/00
Inventor 任超任彧仲王润涛康弋杜倩倩莘丰培王铎李利成旭鹏
Owner 河南省地质矿产勘查开发局第一地质矿产调查院
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