CN108753301A - Application of the Guava Leaf in reducing farmland soil heavy metals toxicity - Google Patents
Application of the Guava Leaf in reducing farmland soil heavy metals toxicity Download PDFInfo
- Publication number
- CN108753301A CN108753301A CN201810510301.7A CN201810510301A CN108753301A CN 108753301 A CN108753301 A CN 108753301A CN 201810510301 A CN201810510301 A CN 201810510301A CN 108753301 A CN108753301 A CN 108753301A
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- Prior art keywords
- guava leaf
- soil
- guava
- leaf
- toxicity
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- 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
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- 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
- C09K2101/00—Agricultural use
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses application of the Guava Leaf in reducing farmland soil heavy metals toxicity.Guava Leaf is dried to constant weight, is then crushed, 60 mesh then are screened to the Guava Leaf after crushing；Pretreated Guava Leaf is launched into pending soil, is uniformly mixed, Guava Leaf injected volume is the 0.5-5% of soil total amount；Guava Leaf is handled at least 16 hours in the case where soil is in leaching state.Guava Leaf can effectively reduce farmland soil heavy metals toxicity, especially Pb-Zn ore district periphery farmland soil heavy metals toxicity, play passivation, and Guava Leaf derives from a wealth of sources, of low cost, and be environmentally protective material, will not cause secondary pollution to soil.
Description
Technical field
The embodiment of the present invention is related to heavy metal-polluted soil passivating technique, and farmland is being reduced in particular to Guava Leaf
Application in Index of Heavy Metal Toxicity in Soil, especially Pb-Zn ore district periphery farmland soil heavy metals toxicity.
Background technology
In recent years, heavy metal pollution of soil problem is increasingly serious, and it is people to administer, repair the heavy metal pollution being passivated in soil
The challenge that class faces needs to search out preferential and cures the good passivator of regulation effect to lower treatment cost.?
It is shown in the national Soil Pollution Investigation bulletins carried out in 2014, the exceeded situation of various heavy pollutant is tight in soil
It is high, wherein heavy metal Cr, Zn, Cd, Ni, Cu, Pb, As pollutant point exceeding standard rate be respectively 1.1%, 0.9%, 7.0%,
4.8%, 2.7%, 2.1%, 1.6%.In terms of heavy metal pollution source, the industrial activities such as mining, ore dressing and smelting are to cause weight
One of the main source of metallic pollution soil.Guangxi province rich in mineral resources, since the eighties in last century, non-ferrous metal is adopted
Mineral Processing Enterprises emerge in large numbers one after another, and since development model is extensive, the industrial structure is unreasonable, and environmental protection of enterprise consciousness is weak, supervision is not in place
Etc. reasons, the discarded ground heavy metal pollution of soil of industry and mining is very prominent, because the backwardness of technology and environmental protection consciousness were not at that time
By force, the waste water and dregs of mining, ore dressing plant discharge are not administered.
It is passivated heavy metal-polluted soil by chemical method, is to add passivator into soil, changes the chemistry of heavy metal-polluted soil
Existing forms, to reduce the activity and bio-toxicity of its heavy metal.Find a kind of, achievement economy height cheap with use cost
The advantages that imitating, working suitable for development pollution in wide area soil remediation and do not influence crops farming passivator is heavy metal-polluted soil dirt
It is primarily upon and solves the problems, such as in dye repairing research.
Invention content
The purpose of the present invention is to provide a kind of new applications of Guava Leaf, that is, are reducing farmland soil heavy metals toxicity,
New opplication especially in Pb-Zn ore district periphery farmland soil heavy metals toxicity.
The method of the Guava Leaf application of the present invention, includes the following steps：
Pretreatment：Guava Leaf is dried to constant weight, is then crushed, 60 then are screened to the Guava Leaf after crushing
Mesh；
It launches：Pretreated Guava Leaf is launched into pending soil, is uniformly mixed.
Reaction：Guava Leaf reacts at least 16 hours in soil extract.
Guava Leaf be Myrtaceae Psidium plant guava leaf, Guava Leaf contain it is a plurality of types of chemistry at
Point, at present it has been reported that have tannin (Fig. 1), Quercetin (Fig. 2), triterpene (Fig. 3), flavones, polyphenol compound, guava
Acid, polysaccharide, volatile oil, sequiterpene, miscellaneous terpene aldehyde class etc..
Guava Leaf has reduction heavy metal-polluted soil Leaching effect, and the ingredient acted is mainly Guava Leaf
Machine matter rich in a variety of organo-functional groups, such as-COOH ,-OH can introduce a large amount of oxygen-containing group in acidity containing a huge sum of money after dissolving
The solution of category increases Cation Exchange Capacity in Soils.It can be by forming an insoluble huge sum of money rich in-COOH ,-OH group organic matter
Category-organic double compound, heavy metal in soil can form with carboxyl (RCOOH) in the organic matter of Guava Leaf stablize in the solution
Complex compound, reduce the water-soluble state and exchangeable species component of heavy metal-polluted soil, to reduce heavy metal contaminants biology can profit
It is absorbed with property, reduces its Index of Heavy Metal Toxicity in Soil.On the other hand.Guava Leaf pH value (pH=5.92) is weakly acidic, guava
Leaf has adsorbed negatively charged ions in soil, so that soil negative electrical charge number is reduced, to reduce soil preservation heavy metal ion.
By taking guava organic matter carboxyl as an example, the mechanism that reduces soil Leaching include Guava Leaf surface carboxyl groups with again
Metal generates stable complex compound.Reaction equation is indicated with following formula：
M2++ RCOOH=RCOOM+2H+(M represents metal such as Pb, Cd etc., and RCOOH represents carboxyl in Guava Leaf organic matter
Ingredient)
It can be seen that guava leaf, which has, reduces heavy metal-polluted soil Leaching effect.
Compared with the prior art, advantage of the invention is that：
1) Guava Leaf derives from a wealth of sources, of low cost.
2) Guava Leaf is environmentally protective material, will not cause secondary pollution to soil.
3) Guava Leaf can effectively reduce farmland soil heavy metals toxicity, especially a Pb-Zn ore district periphery agricultural land soil huge sum of money
Belong to toxicity, plays passivation.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of Related Art
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description merely relates to some of the present invention
Embodiment, not limitation of the present invention.
Fig. 1 is the structural formula of each tannin compositions in Guava Leaf.
Fig. 2 is the structural formula of Quercetin in Guava Leaf.
Fig. 3 is the structural formula of triterpenoid in Guava Leaf.
Fig. 4 is the place of production 1 Guava Leaf removal paddy field soil heavy metal toxicity design sketch.
Fig. 5 is the place of production 2 Guava Leaf removal paddy field soil heavy metal toxicity design sketch.
Fig. 6 is the place of production 3 Guava Leaf removal paddy field soil heavy metal toxicity design sketch.
Fig. 7 is Myrtaceae eucalyptus plant leaf removal paddy field soil heavy metal toxicity design sketch.
Fig. 8 is Myrtaceae rose fogfruit leaf removal paddy field soil heavy metal toxicity design sketch.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
It applies mode and further unrestricted detailed description is made to technical solution of the present invention.
Embodiment 1：
Certain 1 Guava Leaf of the place of production is taken, is dried under field conditions (factors) to constant weight, then the guava crushing up leaves after drying,
Guava Leaf passivator is made after being screened to 60 mesh to the Guava Leaf after crushing.
Embodiment 2：
Certain 2 Guava Leaf of the place of production is taken, is dried under field conditions (factors) to constant weight, then the guava crushing up leaves after drying,
Guava Leaf passivator is made after being screened to 60 mesh to the Guava Leaf after crushing.
Embodiment 3：
Certain 3 Guava Leaf of the place of production is taken, is dried under field conditions (factors) to constant weight, then the guava crushing up leaves after drying,
Guava Leaf passivator is made after being screened to 60 mesh to the Guava Leaf after crushing.
Embodiment 4：
Myrtaceae eucalyptus plant leaf (non-Guava Leaf) is taken, is dried under field conditions (factors) to constant weight, then after drying
Myrtaceae eucalyptus plant leaf passivator is made after being screened to 60 mesh to the leaf after crushing in crushing up leaves.
Embodiment 5：
Myrtaceae rose fogfruit leaf (non-Guava Leaf) is taken, is dried under field conditions (factors) to constant weight, then will dry
Guava crushing up leaves afterwards, obtained Myrtaceae rose fogfruit leaf is blunt after being screened to 60 mesh to the Guava Leaf after crushing
Agent.
The passivator that Examples 1 to 5 obtains is detected：
50ml centrifuge tubes add paddy field soils of the 2g by heavy metal pollutions such as lead, zinc and cadmiums, according to soil weight ratio
0,1%, 2%, 3%, 4%, 5% the Guava Leaf of embodiment 1, embodiment 2 and embodiment 3 is added again, then be added to centrifuge tube
40mlTCLP extracting solutions (pH is 2.88 ± 0.05), 200rpm shakes 18h, crosses 0.45 μm of filter membrane, extraction is measured after 25 times of dilution
Content of beary metal in liquid.The soil of passivator is not added with as space management, each processing is repeated 3 times.
According to《The measurement inductively coupled plasma mass spectrometry of 65 kinds of elements of water quality》HJ700-2014 test methods measure.
Interpretation of result：
See that Fig. 4, the guava of embodiment 1 decline obviously paddy field soil lead, cadmium, zinc TCLP Leachings.5% mass
Than, guava decline Pb in Soil, cadmium, zinc toxicity concentration removal rate are maximum, and respectively 65.47%, 40.87%, 29.32%, poison
Property reducing effect：Pb>Cd>Zn.
See Fig. 5,2 Guava Leaf of embodiment the TCLP Leachings of lead, cadmium, zinc are changed it is apparent, lead when 5% mass ratio,
Cadmium, the toxic concentration decline of zinc are maximum, and respectively 64.38%, 29.67%, 23.37%, toxicity declines effect：Pb>Cd>Zn.
See that Fig. 6,3 Guava Leaf of embodiment change the TCLP Leachings of zinc, cadmium, lead apparent.Lead when 5% mass ratio,
Cadmium, the toxic concentration decline of zinc are maximum, and respectively 63.93%, 34.83%, 32.90%.Toxicity declines effect：Pb>Cd>Zn.
See Fig. 7, it is unknown to the TCLP Leachings variation of zinc, cadmium, lead that 4 Myrtaceae eucalyptus of embodiment belongs to non-Guava Leaf
It is aobvious.
See that Fig. 8,5 Myrtaceae rose wood of embodiment belong to non-Guava Leaf and change not to the TCLP Leachings of zinc, cadmium, lead
Obviously.
The result shows that Guava Leaf, which has, reduces heavy metal-polluted soil Leaching effect.
It is pointed out that the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to
Those skilled in the art can understand the contents of the present invention and implements according to this, and the protection of the present invention can not be limited with this
Range.Any equivalent change or modification in accordance with the spirit of the invention should be covered by the protection scope of the present invention.
Claims (2)
1. application of the Guava Leaf in reducing farmland soil heavy metals toxicity.
2. Guava Leaf application according to claim 1, which is characterized in that way is as follows：
1) it pre-processes：Guava Leaf is dried to constant weight, is then crushed, 60 mesh then are screened to the Guava Leaf after crushing；
2) it launches：Pretreated Guava Leaf is launched into pending soil, is uniformly mixed, Guava Leaf injected volume is soil
The 0.5-5% of earth total amount.
3) it reacts：Guava Leaf is handled at least 16 hours in the case where soil is in leaching state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510301.7A CN108753301A (en) | 2018-05-24 | 2018-05-24 | Application of the Guava Leaf in reducing farmland soil heavy metals toxicity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810510301.7A CN108753301A (en) | 2018-05-24 | 2018-05-24 | Application of the Guava Leaf in reducing farmland soil heavy metals toxicity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108753301A true CN108753301A (en) | 2018-11-06 |
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ID=64006337
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810510301.7A Pending CN108753301A (en) | 2018-05-24 | 2018-05-24 | Application of the Guava Leaf in reducing farmland soil heavy metals toxicity |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313922A (en) * | 2007-05-30 | 2008-12-03 | 广州联创思远利生物科技有限公司 | Method for obtaining extract from several frequently seen plants and uses of the extract |
| CN102920785A (en) * | 2012-11-27 | 2013-02-13 | 哈药集团中药二厂 | Method for extracting total flavone from guava leaves |
-
2018
- 2018-05-24 CN CN201810510301.7A patent/CN108753301A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101313922A (en) * | 2007-05-30 | 2008-12-03 | 广州联创思远利生物科技有限公司 | Method for obtaining extract from several frequently seen plants and uses of the extract |
| CN102920785A (en) * | 2012-11-27 | 2013-02-13 | 哈药集团中药二厂 | Method for extracting total flavone from guava leaves |
Non-Patent Citations (2)
| Title |
|---|
| 杜文慧等: "中轻度污染菜地土壤中重金属阻控剂组合优化研究", 《杭州师范大学学报（自然科学版）》 * |
| 谢枫等: "柿单宁在重金属吸附中的应用研究进展", 《华中农业大学学报》 * |
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Application publication date: 20181106 |
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