A method for strengthening and remediating heavy metal compound polluted soil

A compound pollution and heavy metal technology, applied in the restoration of polluted soil, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of restricting agricultural and animal husbandry production and social and economic development, and the limitations of pollution control methods

Active Publication Date: 2021-06-08
HENAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the complexity of multiple heavy metal pollution in the land, the limitations of pollution control methods, and serious restrictions on agricultural production and social and economic development in this area, it is necessary to develop a soil that can be used for the remediation of multiple heavy metal pollution. Repair Improver

Method used

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  • A method for strengthening and remediating heavy metal compound polluted soil
  • A method for strengthening and remediating heavy metal compound polluted soil
  • A method for strengthening and remediating heavy metal compound polluted soil

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Mix fly ash, carbonized rice husk and vermiculite according to the mass ratio of 2.5:1.8:6.5 to obtain the matrix;

[0040] (2) Glomus mosei (purchased from the Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, China Arbuscular Mycorrhizal Germplasm Resource Bank No.: BGC XJ01, about 300 spores / 20g) was inoculated at a ratio of 8wt% to In the substrate prepared in step (1), mix evenly to obtain a composite substrate; then water and transplant the corn seedlings with at least two true leaves into the composite substrate, and use corn to propagate and cultivate Glomus moxie, wherein , the thickness of the composite matrix is ​​18cm, and the conditions for the expansion and cultivation are 28°C for 75 days of expansion and cultivation, and 10 days before the expansion and cultivation, the water holding capacity of the composite matrix is ​​75% of the maximum water holding capacity in the field, which is conducive to the ge...

Embodiment 2

[0046] Concrete method is the same as embodiment 1, and difference is that the applied amount of sodium selenite is 1mg kg in the step (5) -1 Soil, measured as selenium.

Embodiment 3

[0048] Concrete method is the same as embodiment 1, and difference is that the applied amount of sodium selenite is 5mg kg in the step (5). -1 Soil, measured as selenium.

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Abstract

The invention belongs to the field of soil heavy metal pollution restoration, and in particular relates to a method for strengthening restoration of heavy metal compound polluted soil. The present invention uses host plants to propagate and cultivate the arbuscular mycorrhizal fungi to obtain the arbuscular mycorrhizal fungus inoculum; apply base fertilizer in the heavy metal compound polluted soil, and supplement water to 50-70% of the field water holding capacity of the soil at the same time; Apply the trace element selenium to the soil after applying base fertilizer and replenishing water, and balance for 14 to 30 days; finally, inoculate the arbuscular mycorrhizal fungal agent in the balanced heavy metal complex contaminated soil, and repair and improve for 60 to 90 days. In the method for strengthening and remediating heavy metal compound-contaminated soil provided by the invention, sodium selenite is added, and mycorrhizal fungal agent is added to reduce the effectiveness of heavy metals in soil by using the arbuscular mycorrhizal fungi to solidify heavy metals. Moreover, arbuscular mycorrhiza can weaken or relieve the inhibitory effect of high concentration of selenium ions on crop growth.

Description

technical field [0001] The invention belongs to the field of soil heavy metal pollution restoration, and in particular relates to a method for strengthening restoration of heavy metal compound polluted soil. Background technique [0002] Land heavy metal pollution is a worldwide problem, which seriously restricts the agricultural and animal husbandry production and social and economic development in this region. Today's heavy metal pollution is often the compound pollution of two or more kinds of heavy metals coexisting. Compared with single pollution, the interaction between elements or compounds in heavy metal complex pollution and the comprehensive impact on ecological effects are challenging for the remediation of polluted soil. At present, the remediation of soil heavy metal pollution is mainly focused on a single element, while the simultaneous remediation of multiple heavy metal pollution in soil is less studied. In addition, studies have shown that the antagonism o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/10C09K17/40C09K101/00
CPCB09C1/08B09C1/105B09C2101/00C09K17/40C09K2101/00
Inventor 亓琳申志强朱超亚向璐李梦鸽
Owner HENAN UNIV OF SCI & TECH
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