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Method for enriching rare earth elements in weathered crust by using pteridophytes

A technology of ferns and rare earth elements, which is applied in the field of rare earth enrichment in weathering crust, can solve the problems of rare earth pollution, entry, heavy metal pollution, etc., and achieve the effect of improving the ecological environment and realizing enrichment and recovery

Active Publication Date: 2021-08-10
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leachate used in the above mining methods will enter the surrounding farmland and river environment, causing environmental problems such as ammonia nitrogen, heavy metal pollution, and rare earth pollution.

Method used

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  • Method for enriching rare earth elements in weathered crust by using pteridophytes
  • Method for enriching rare earth elements in weathered crust by using pteridophytes
  • Method for enriching rare earth elements in weathered crust by using pteridophytes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for enriching rare earth elements in weathering crust by using ferns

[0027] 1) Soil pretreatment: Dig the soil on the weathering crust to a depth of 10-20cm, and spread the soil pretreatment agent;

[0028] The components of the soil pretreatment agent include humus 30%, bagasse 10%, calcium salt 7%, chitosan 10%, tea saponin 2%, livestock manure 10%, citric acid 6%, malic acid 10% %, oxalic acid 5%, EDTA 5%, EDDS 3% and amino acid 2%, soil pretreatment agent mixed with water at 1:500;

[0029] 2) Planting ferns: 5 days after soil pretreatment is carried out in the weathered shell, plant ferns;

[0030] The vertical direction of the weathering crust can be divided into topsoil layer, full weathering layer and half weathering layer;

[0031] Plant a black fern in the topsoil layer 1 / m 2 , 20 ferns / m 2 , planted in a row;

[0032] Planting 5 ferns / m2 in the whole regolith 2 , 5 awnings / m 2 20 ferns / m 2 , planted in a row;

[0033] Planting 15 ferns / m2 ...

Embodiment 2

[0035] A method for enriching rare earth elements in weathering crust by using ferns

[0036] 1) Soil pretreatment: Dig the soil on the weathering crust to a depth of 10-20cm, and spread the soil pretreatment agent;

[0037] The components of the soil pretreatment agent include humus 32%, bagasse 8%, calcium salt 10%, chitosan 6%, tea saponin 1%, livestock manure 5%, citric acid 10%, malic acid 7% %, oxalic acid 6%, EDTA 4%, EDDS 6% and amino acid 5%, soil pretreatment agent mixed with water at 1:500;

[0038] 2) Planting ferns: 7 days after soil pretreatment is carried out in the weathered shell, plant ferns;

[0039] The vertical direction of the weathering crust can be divided into topsoil layer, full weathering layer and half weathering layer;

[0040] Plant 10 scaly ferns / m2 in the topsoil 2 10 ferns / m 2 , planted in a row;

[0041] Plant 1 fern / m2 in the whole regolith 2 , 20 scaly ferns / m 2 Hemangji 10 trees / m 2 , planted in a row;

[0042] Planting 20 ferns / m2...

Embodiment 3

[0044] A method for using ferns to enrich rare earth elements in weathering crust 1) soil pretreatment: dig the soil on the weathering crust to a depth of 10-20 cm, and spread soil pretreatment agent;

[0045] The components of the soil pretreatment agent include humus 37%, bagasse 5%, calcium salt 5%, chitosan 8%, tea saponin 3%, livestock manure 8%, citric acid 7%, malic acid 5% %, oxalic acid 10%, EDTA 3%, EDDS 8% and amino acid 1%, the soil pretreatment agent was mixed with water at 1:600 ​​and used.

[0046] 2) Planting ferns: 8 days after soil pretreatment is carried out in the weathered shell, plant ferns;

[0047] The vertical direction of the weathering crust can be divided into topsoil layer, full weathering layer and half weathering layer;

[0048] Planting 15 ferns / m2 in the topsoil 2 , 15 black ferns / m 2 20 stalks / m2 , planted in a row;

[0049] Plant 1 fern / m2 in the whole regolith 2 , 20 ferns / m 2 10 Heli White / m 2 , planted in a row;

[0050] Planting ...

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Abstract

The invention belongs to the technical field of weathered crust rare earth enrichment, and particularly relates to a method for enriching rare earth elements in a weathered crust by using pteridophytes. The method comprises the following steps of 1) soil pretreatment; and 2) pteridophyte planting, wherein the pteridophytes are planted on the weathered crust, and the pteridophytes comprise one or more of blechnum orientale, dicranopteris pedata, athyrium filix-femina, dryopteris filix-mas, asplenium trichomanes, diplopterygium glaucum, lindsaea odorata, woodwardia japonica, stenoloma chusana, adiantum flabellulatum, cibotium barometz, microlepia strigosa and diplazium donianum. Different pteridophytes are planted on different structural layers of the weathered crust in different modes to be used for adsorbing rare earth elements in soil, so that the rare earth resources can be effectively utilized; and the effect of improving the surrounding ecological environment can be achieved by planting the pteridophytes in the weathered crust soil. Compared with an existing rare earth mining technology, the method cannot cause secondary pollution. The method provides an economical and effective solution way for realizing ecological management of rare earth polluted land and rare earth reclamation.

Description

technical field [0001] The invention belongs to the technical field of rare earth enrichment in weathering crust, in particular to a method for enriching rare earth elements in weathering crust by utilizing ferns. Background technique [0002] Rare earth elements (REEs) are the collective name of 17 elements of the lanthanide series including scandium and yttrium, and can be divided into light rare earth elements, medium rare earth elements and heavy rare earth elements. Due to its special physical and chemical properties, rare earth elements have special optical, electrical, magnetic and other properties, and are widely used in electronics, petrochemical, metallurgy, machinery, energy and light industry and other fields. Industrial MSG". Therefore, the mining of rare earth minerals is a very critical step in resource utilization. [0003] Among rare earth mineral resources, ion adsorption rare earth deposits are a unique and ubiquitous rare earth resource discovered in my...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00
CPCC22B59/00
Inventor 王园园王高锋朱建喜何宏平孙铭琦陈情泽邢介奇梁晓亮马灵涯魏景明
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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