CN108668552A - A kind of ion type rareearth tailings ground modifying agent and its restorative procedure - Google Patents
A kind of ion type rareearth tailings ground modifying agent and its restorative procedure Download PDFInfo
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- CN108668552A CN108668552A CN201810338539.6A CN201810338539A CN108668552A CN 108668552 A CN108668552 A CN 108668552A CN 201810338539 A CN201810338539 A CN 201810338539A CN 108668552 A CN108668552 A CN 108668552A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 99
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 63
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 39
- 241000219094 Vitaceae Species 0.000 claims abstract description 35
- 235000021021 grapes Nutrition 0.000 claims abstract description 35
- 241000196324 Embryophyta Species 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 210000003608 fece Anatomy 0.000 claims description 9
- 238000003306 harvesting Methods 0.000 claims description 9
- 239000010871 livestock manure Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000009331 sowing Methods 0.000 claims description 9
- 238000003973 irrigation Methods 0.000 claims description 5
- 230000002262 irrigation Effects 0.000 claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims description 4
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 4
- 229910052691 Erbium Inorganic materials 0.000 claims description 4
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 4
- 229910052689 Holmium Inorganic materials 0.000 claims description 4
- 229910052765 Lutetium Inorganic materials 0.000 claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 4
- 229910052772 Samarium Inorganic materials 0.000 claims description 4
- 229910052771 Terbium Inorganic materials 0.000 claims description 4
- 229910052775 Thulium Inorganic materials 0.000 claims description 4
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 4
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims description 4
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 4
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 4
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 4
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 claims description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 4
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 4
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 4
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims description 4
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 4
- 230000006872 improvement Effects 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 239000002028 Biomass Substances 0.000 abstract description 4
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 125000001477 organic nitrogen group Chemical group 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 12
- 150000002500 ions Chemical class 0.000 description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 8
- 230000002547 anomalous effect Effects 0.000 description 8
- DIOSHTLNZVXJOF-UHFFFAOYSA-N 2,5-bis(3-oxobutanoylamino)benzenesulfonic acid Chemical group CC(=O)CC(=O)NC1=CC=C(NC(=O)CC(C)=O)C(S(O)(=O)=O)=C1 DIOSHTLNZVXJOF-UHFFFAOYSA-N 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 229960002163 hydrogen peroxide Drugs 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 244000025272 Persea americana Species 0.000 description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000645 desinfectant Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000513 principal component analysis Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 235000007926 Craterellus fallax Nutrition 0.000 description 1
- 240000007175 Datura inoxia Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241000196171 Hydrodictyon reticulatum Species 0.000 description 1
- 240000008013 Phytolacca acinosa Species 0.000 description 1
- 235000009076 Phytolacca acinosa Nutrition 0.000 description 1
- -1 Rare-earth cation Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004856 soil analysis Methods 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000005418 vegetable material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mycology (AREA)
- Botany (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of ion type rareearth tailings modifying agent and its restorative procedure, the present invention is using modifying agent improvement rare earth tailings mine and passes through the method for dyers' grapes Extraction of rare earth element.Soil a great number of elements content is promoted with making tailings, and the conductivity of soil, carbon-nitrogen ratio is also obviously improved.Total rare earth (TRE) concentration after plantation dyers' grapes in its rhizosphere soil solution decreased significantly, total organic carbon and organic nitrogen content, which have, to be obviously improved, the present invention provides a kind of new modifying agent and plant improvement pattern for the repairing and treating on rare earth tailings ground, and the pattern is to the soil improvement on rare earth tailings ground and reclaims and plays good effect.On the other hand, dyers' grapes growth is rapid, and biomass is big, and resistance is strong, high to Rare Earth Accumulation ability, can be recycled for later stage rare earth resourcesization and provide good basis.
Description
Technical field
The invention belongs to rare earth tailings recovery technique field is specifically a kind of the new and improved of rare earth tailings ground
Method and the method for utilizing Rare Earth Accumulation plant extract recovering rare earth element.
Background technology
Ion type rareearth ore is the important strategic resource in China, mainly distribution Jiangxi Province of China, Guangdong Province, the Inner Mongol,
The ground such as Fujian Province, Guangxi province and Hunan Province.The ion type rareearth ore reserves in Jiangxi Province account for the whole nation 40%, production index,
Yield accounts for 70% or so of heavy rare earth in the whole nation, and the rare earth resources of Ganzhou City account for the 80.65% of entire Jiangxi Province.Ionic
Most of rare earth is adsorbed in the form of ion on the clay minerals such as kaolin in rare earth tailings mine, and general abundance is relatively low.Clay
Rare-earth cation on mineral is not easy to dissolve in second alcohol and water, but in strong electrolytic solution (such as NH4Ac, NH4Cl,
(NH4)2SO4, NaCl etc.) ion exchange can occur and enter in solution.The mining time of Ganzhou City's ion type rareearth ore is long,
Yield is more, and the Rare-earth Industry for local economic development and China has made great contribution.For a long time, ion type rareearth
Mine is generally exploited using dump leaching process：The ore in sand form that rare earth is rich in the weathered layer of Biao Tu lower layers and half weathered layer is carried
To dump leaching field, leached repeatedly with ammonium sulfate.Although the rare earth mother solution compared with horn of plenty can be obtained, something lost leaves a large amount of dilute
Native tailings.A large amount of land resource is not only taken up to these tailings, is also easy to destroy surrounding area vegetation, causes serious water
Soil is lost in.Another aspect, tailings remaining ammonium sulfate be easy to enter water body and farmland with soil erosion, cause water body
With the sulfate radical in farmland and the pollution of ammonium ion and eutrophication.In addition, the rare earth metal in rare-earth tailing area is dense
Spend higher, common high hundred times of the fresh water of mining area surrounding body middle rare earth concentration ratio.Give local ecological environment and residence to rare earth tailings
The physical and mental health of the people brings serious harm.Therefore the reparation on the tailings ground of ion type rareearth ore is very urgent.
Compared with traditional physical chemistry restorative procedure, phytoremediation is a kind of soil remediation side of green high-efficient economy
Formula.However, the phytoremediation research at present about rare earth tailings ground is less, the effect of common plant allows of no optimist, it is difficult to promote
It utilizes.This team early-stage study shows that dyers' grapes biomass is big, and growth is rapid, and resistance is strong, has stronger rare earth element
Accumulation ability.But it yet there are no it and repair the report on rare earth tailings ground.
Invention content
The technical problem to be solved by the present invention is to overcome the barren and physicochemical drawbacks on existing ion type rareearth tailings ground,
The problem of physicochemical property is poor with aiming to solve the problem that rare earth tailings, and nutritive element content is low, and vegetation is difficult to grow, while promoting this skill
Art provides material for later stage rare earth element resource utilization.
The purpose of the present invention is to provide a kind of rare earth tailings modifying agent and its restorative procedure.
The technical solution used in the present invention is：
A kind of modifying agent on rare earth tailings ground, by pig manure and sawdust by volume 1：1.5~2.5 compositions.
A kind of restorative procedure on rare earth tailings ground, by modifying agent described above, with rare earth tailings soil mixes, then plants
Plant plant dyers' grapes.
A kind of restorative procedure on rare earth tailings ground, includes the following steps：
S1, by modifying agent described above, with rare-earth tailing soil mixes, and turns over；
Dyers' grapes seed is seeded in the soil of S1 by S2, watering；
S3, growth harvest dyers' grapes aerial part after at least 100 days, retain under ground portion.
Further, in step S1, modifying agent applied amount is 2~3kg/m2。
Further, in step S1, the depth turned over is 8~15cm.
Further, in step S2, dyers' grapes seed sterilizes after being impregnated through water, is washed with water net rear for sowing.
Further, the time that the water impregnates is 3~5h, and temperature is 24~30 DEG C.
Further, the disinfection is to sterilize 8~12min with 12~17% hydrogenperoxide steam generators.
Further, disposable to water after sowing in step S2, it is pure water to water, and irrigation amount is 8~12L/
m2, do not rewater later.
Further, thinning is carried out after sowing 10~18 days, makes to be divided into 12~19cm between plant.
The application of modifying agent and plant dyers' grapes in repairing ion type rareearth tailings ground, the modifying agent by pig manure and
Sawdust in mass ratio 1：1.5~2.5 compositions.
The application of modifying agent and plant dyers' grapes in enrichment or/and recovering rare earth element, the modifying agent is by pig manure
With sawdust in mass ratio 1：1.5~2.5 compositions.
Further, the rare earth element specifically includes lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium
(Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu).
The beneficial effects of the invention are as follows：
The present invention provides a kind of new and improved dose for rare earth tailings, while providing a kind of new rehabilitation plant and repairing
Complex pattern has reached improvement and has repaired the target on rare earth tailings ground.Meanwhile using common are machine waste as modifying agent,
It derives from a wealth of sources, it is cheap, the cyclic utilization of waste is realized, solves its environmental problem that may be brought.In addition, dyers' grapes
Strong with resistance, growth is rapid, and biomass is big, the characteristics of need not managing, while to the accumulation ability of rare earth element height, leading to
It crosses and harvests its aerial part and can have larger economic benefit with recovering rare earth element, be worth promoting.
Description of the drawings
Soil liquid middle rare earth total concentration (A) (mg kg of Fig. 1 different experiments cells-1) and TOC/TNb contents (B) (mgL-1), Total REEs indicate total rare earth (TRE) concentration in figure.
The factor loading scatter plot of Fig. 2 BAPA group soil liquid principal component analysis, PC1：First principal component, PC2：Second
Principal component, Rare Earth Elements:Rare earth element, Major elements:A great number of elements, Organic acids:Have
Machine acid, TOC：Total organic carbon, TNb：Total organic carbon.
Fig. 3 P.americana respectively organize total rare earth concentration (mg kg-1) and chondrite normalized rare earth divide anomalous mode
Formula；A is the rare earth total content planted in tissue root, stem, leaf, and B, C, D are respectively the content of each rare earth element in root, stem, leaf.
Total score anomalous mode formula (A) of Fig. 4 rare earth elements in soil-families of plant divides anomalous mode in bulk soil to Rhizosphere Soil
Formula (B), from Rhizosphere Soil to the soil liquid divide anomalous mode formula (C), from the soil liquid to root divide anomalous mode formula (D), from root to
Point different (E) of stem, point different (F) from stem to leaf portion.
Specific implementation mode
With reference to specific embodiment, the present invention is further illustrated.
Embodiment 1
(1) by tailings soil is mixed with modifying agent, and ploughed depth 8cm is sufficiently mixed, applied amount 2kg/m2, side
Border low bank of earth between fields height is 15cm.
The modifying agent is by pig manure and sawdust by volume 1：1.5 composition.
(2) the dyers' grapes seed kind handled well is entered wherein, bar shaped sowing, bar shaped interval 30cm.
The dyers' grapes seed need to pass through warm water and impregnate 5h, later with 12% disinfectant with hydrogen peroxide 12min, it is pure
Water is used to sow after cleaning.
(3) disposable watering after plant seeding, it is pure water, irrigation amount 8L/m to water2, do not rewater later.
(4) thinning after two weeks ensures to be spaced 12~19cm between plant strain.
It harvests plant after (5) 100 days, cuts aboveground vegetation part along soil surface when harvest, under ground portion retains.
Full open-air planting type is taken in above-mentioned all operations.
There are lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium in soil to the tailings
(Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) pollution.
Embodiment 2
(1) by tailings soil is mixed with modifying agent, and ploughed depth 12cm is sufficiently mixed, applied amount 3kg/m2, side
Border low bank of earth between fields height is 15cm.
The modifying agent is by pig manure and sawdust by volume 1：2.5 composition.
(2) the dyers' grapes seed kind handled well is entered wherein, bar shaped sowing, bar shaped interval 30cm.
The dyers' grapes seed need to pass through warm water and impregnate 3h, later with 17% disinfectant with hydrogen peroxide 8min, it is pure
Water is used to sow after cleaning.
(3) disposable watering after plant seeding, it is pure water, irrigation amount 12L/m to water2, do not rewater later.
(4) thinning after two weeks ensures to be spaced 12~19cm between plant strain.
It harvests plant after (5) 100 days, cuts aboveground vegetation part along soil surface when harvest, under ground portion retains.
Full open-air planting type is taken in above-mentioned all operations.
There are lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), europium (Eu), gadolinium (Gd), terbium in soil to the tailings
(Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu) pollution.
Embodiment 3
Experiment packet：
The present embodiment is experimental subjects with selecting Ganzhou City of Jiangxi Province Dingnan County Rare Earth Mine.Control group is not apply improvement
The barren ground (B) of agent, does not apply modifying agent planting plants group (BPA), and experimental group is to apply modifying agent group (BA) and apply
Modifying agent and planting plants group (BAPA).Some of which result is related to the Rhizosphere Soil in BAPA groups and Non-rhizosphere soil, uses respectively
BAPA-R and BAPA-B is indicated, is related to the Rhizosphere Soil in BPA groups and Non-rhizosphere soil, respectively with BPA-R and BPA-B come table
Show.Reference material and experimental group are five repetitions.
The rare earth tailings of this example modifying agent be pig manure and sawdust by volume 1：2 compositions, amount of application 2.6kg/
m2。
The specific method is as follows for experimental group：
(6) by tailings soil is mixed with modifying agent, and ploughed depth 10cm is sufficiently mixed, applied amount 2.6kg/m2
(BA groups and BAPA groups), marginal low bank of earth between fields height is 15cm.
(7) for BAPA and BPA groups, the dyers' grapes seed kind handled well is entered wherein, bar shaped sowing, bar shaped interval
30cm.The dyers' grapes seed need to pass through warm water impregnate 4h, later with 15% disinfectant with hydrogen peroxide 10min, pure water
For sowing after cleaning.
(8) disposable watering after plant seeding, it is pure water, irrigation amount 10L/m to water2, do not rewater later.
(9) thinning after two weeks ensures to be spaced 12~19cm between plant strain.
It harvests plant after (10) 120 days, cuts aboveground vegetation part, underground part code insurance along soil surface when harvest
It stays.Rhizosphere Soil, Non-rhizosphere soil, modifying agent group soil, non-modifying agent group soil analysis test can be acquired simultaneously, while acquiring phase
The soil liquid test answered, acquires whole strain dyers' grapes comparative analysis.
Full open-air planting type is taken in above-mentioned all operations.
Experimental result：
1. because BPA groups (not applying modifying agent planting plants group) plant cannot germinate and grow, therefore not doing about BPA below
The analysis discussion of group.After planting dyers' grapes, a great number of elements such as Al, Ca, P of soil, S etc., which is obtained, significantly increases (table 1).
Tailings the pH of soil be acid, the pH value of soil does not occur significantly to change after improvement, but its conductivity (EC), carbon
Nitrogen ratio (TC/TN), which is obtained for, to be obviously improved (table 2).
A great number of elements concentration (mean+SD) [%W/W] in 1 different experiments cell of table
Different letters indicate that there are significant differences under identity element
The pH of 2 different community soil of table, EC and carbon-nitrogen ratio (TC/TN)
* indicating processing group, there are significant difference (P ＜ 0.05) with blank group, and there are poles with blank group for * * expressions processing group
Significant difference (P ＜ 0.01)
2. compared with the soil liquid of blank group rare earth tailings, P.americana (dyers' grapes) is planted in BAPA-R groups
Total rare earth (TRE) concentration significantly decreases (- 97.5%) (Figure 1A) in the soil liquid of its rhizosphere later, total organic carbon (TOC) and has
Machine nitrogen (TNb) content, which significantly increases, has been respectively increased 475% and 321% (Figure 1B).Meanwhile planting soil after P.americana
The pH value of solution is promoted from 5.39 to 6.34 (tables 3).Principal component analysis shows relative to blank group B, processing group BA, BAPA-
Apparent variation has occurred in B, BAPA-R, and rare-earth elements La contributes maximum to blank group, and TOC (total organic carbon) and pH is to improvement
The contribution of group is maximum (Fig. 2).
The pH of 3 different experiments cell B, BA, BAPA-B, the BAPA-R soil liquid of table
3.BAPA groups Central America Phytolacca acinosa can be colonized and grow in mining soil, and the rare earth element concentration of leaf portion is much larger than
Root and stem can reach 2512mg kg-1, the rare earth concentration of root is 200~600mg kg-1(Fig. 3).Spherolite falls from the sky or outer space
Respectively tissue all shows apparent LREE enrichment phenomenons to dyers' grapes after stone standardization, and it is different that all there is Ce negative anomalys and Eu to bear
It often occurs as (Fig. 3).
Total score anomalous mode formula of the rare earth element in soil-families of plant is as shown in Figure 4 A, in order to clearly describe BAPA groups
This soil plant system is divided into five processes by fractionation mode of the rare earth elements in soil plant system：1, non-root
Border soil is to Rhizosphere Soil (Fig. 4 B)；2, Rhizosphere Soil to the soil liquid (Fig. 4 C)；3, the soil liquid to plant root (Fig. 4 D)；4, plant
Root is to stem (Fig. 4 E)；5, plant stem to leaf portion (Fig. 4 F).The rare earth element Differentiation Features of five processes show rare earth member
Element from Non-rhizosphere soil to Rhizosphere Soil during without significant change, from Rhizosphere Soil to the soil liquid during occur it is slight
HREE is enriched with and apparent Eu normal anomalies phenomenon (Fig. 4 C).During from the soil liquid to plant root, rare earth point is different to be in
Reveal apparent LREE enrichments and Ce negative anomalys and Eu negative anomalys (Fig. 4 D).Mistake from root to stem and from stem to leaf portion
All occur apparent HREE enrichment phenomenons (Fig. 4 E, F) in journey.
In conclusion the present invention is using modifying agent improvement rare earth tailings mine and passes through the side of dyers' grapes Extraction of rare earth element
Method.Soil a great number of elements content is promoted with making tailings, and the conductivity of soil, carbon-nitrogen ratio is also obviously improved.With do not improve
Blank soil is compared, and is planted the total rare earth (TRE) concentration after dyers' grapes in its rhizosphere soil solution and be decreased significantly, total organic carbon and
Organic nitrogen content, which has, to be obviously improved, while its pH value is promoted from 5.39 to 6.34.The content of rare earth of dyers' grapes leaf portion is aobvious
It writes and is higher than root and stem, leaf portion total rare earth (TRE) is at concentrations up to 2512mg kg-1.Rare earth divides anomalous mode formula to show dyers' grapes overground part
Tend to absorb heavy rare earth element (Gd to Lu).The above method provides one kind for the improvement on Rare Earth Mine tailings ground with restoration of the ecosystem
New reparation pattern and vegetable material, this reparation pattern can not only improve the soil on tailings ground, pollution administration；Meanwhile it will
Organic waste realizes the cyclic utilization of waste as the raw material of modifying agent；On the other hand, the dyers' grapes of plantation have very
Good Extraction of rare eart effect, rare earth element resource utilization, which is utilized, prodigious economic value.
The above results show that the present invention by specific modifying agent and dyers' grapes connected applications, realizes good rare earth
Accumulation ability, and divide anomalous mode formula to learn that its aerial part is more likely to absorb heavy rare earth by rare earth.Since heavy rare earth is than light
Rare earth has the value of bigger, recycling dyers' grapes aerial part to have larger economic potential.In the present invention, because of parent soil material
Light rare earth containing higher proportion, therefore its enrichment energy to heavy rare earth cannot be directly found out from dyers' grapes aerial part
Power.
Therefore, the present invention provides a kind of new modifying agent and plant improvement mould for the repairing and treating on rare earth tailings ground
Formula, the pattern is to the soil improvement on rare earth tailings ground and reclaims and plays good effect.On the other hand, dyers' grapes growth is fast
Speed, biomass is big, and resistance is strong, high to Rare Earth Accumulation ability, can be recycled for later stage rare earth resourcesization and provide good base
Plinth.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of modifying agent on rare earth tailings ground, which is characterized in that by pig manure and sawdust by volume 1：1.5~2.5 compositions.
2. a kind of restorative procedure on rare earth tailings ground, which is characterized in that by modifying agent described in claim 1 and rare earth tailings
Soil mixes, then planting plants dyers' grapes.
3. a kind of restorative procedure on rare earth tailings ground according to claim 2, which is characterized in that include the following steps
S1, by modifying agent described in claim 1, with rare-earth tailing soil mixes, and turns over；
Dyers' grapes seed is seeded in the soil of S1 by S2, watering；
S3, growth harvest dyers' grapes aerial part after at least 100 days, retain under ground portion.
4. according to the method described in claim 3, it is characterized in that：In step S1, modifying agent applied amount is 2~3kg/m2。
5. according to the method described in claim 3, it is characterized in that：In step S1, the depth turned over is 8~15cm.
6. according to the method described in claim 3, it is characterized in that：It is disposable to water after sowing in step S2, it is watered
For pure water, irrigation amount is 8~12L/m2, do not rewater later.
7. according to the method described in claim 3, it is characterized in that：In step S2, sowing carries out thinning after 10~18 days, makes
12~19cm is divided between plant.
8. the application of modifying agent and plant dyers' grapes in repairing ion type rareearth tailings ground, the modifying agent is by pig manure and saw
End in mass ratio 1：1.5~2.5 compositions.
9. the application of modifying agent and plant dyers' grapes in enrichment or/and recovering rare earth element, the modifying agent by pig manure and
Sawdust in mass ratio 1：1.5~2.5 compositions.
10. application according to claim 9, it is characterised in that：The rare earth element specifically include lanthanum, cerium, praseodymium, neodymium, samarium,
Europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium.
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| CN110423175A (en) * | 2019-08-08 | 2019-11-08 | 中国恩菲工程技术有限公司 | For improveing the modifying agent composition and modifying agent of rare-earth tailing sand |
| CN111451260A (en) * | 2020-05-21 | 2020-07-28 | 中山大学 | Method for mining rare earth element plants by using pokeberry |
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