Method for enhanced repairing of heavy metal composite polluted soil

A technology of complex pollution and heavy metals, 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, social and economic development, and the limitations of pollution control methods, and achieve reduction Potential ecological risk, low cost, effect of reducing effectiveness

Active Publication Date: 2019-04-09
HENAN UNIV OF SCI & TECH
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  • Abstract
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  • 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 producti

Method used

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  • Method for enhanced repairing of heavy metal composite polluted soil
  • Method for enhanced repairing of heavy metal composite polluted soil
  • Method for enhanced repairing of heavy metal composite polluted soil

Examples

Experimental program
Comparison scheme
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 heavy metal pollution repairing of land and particularly relates to a method for the enhanced repairing of heavy metal composite polluted soil. The method comprises the steps of carrying out expanding propagation and cultivation on arbuscular mycorrhizal fungi (AMF) by utilizing a host plant to obtain an arbuscular mycorrhizal fungal agent; applying a base fertilizer to the heavy metal composite polluted soil and replenishing water till the water content accounts for 50-70% of water-holding capacity of the soil in the field at the same time; applying microelement selenium to the soil in which the base fertilizer is applied and the water is replenished and balancing for 14-30 days; and finally, inoculating the arbuscular mycorrhizal fungal agent into the balanced heavy metal composite polluted soil and repairing and improving for 60-90 days. The method for the enhanced repairing of the heavy metal composite polluted soil, provided by the invention,has the advantages and effects that while sodium selenite is added, the mycorrhizal fungal agent is added, so that the effectiveness of heavy metal in the soil is reduced by utilizing the solidification effect of the AMF on the heavy metal; and moreover, the inhibition effect of high-concentration selenium ions on crop growth can be attenuated or eliminated by utilizing arbuscular mycorrhiza.

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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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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