CN107913900A - Nano-titanium dioxide is used for the method for soil remediation - Google Patents
Nano-titanium dioxide is used for the method for soil remediation Download PDFInfo
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- CN107913900A CN107913900A CN201711345022.1A CN201711345022A CN107913900A CN 107913900 A CN107913900 A CN 107913900A CN 201711345022 A CN201711345022 A CN 201711345022A CN 107913900 A CN107913900 A CN 107913900A
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- 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
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Abstract
Nano-titanium dioxide is used for the method for soil remediation, belongs to the technical field of remediation contaminated soil, to Cd2+Sunflower is planted in contaminated soil, the mixed solution being made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are (2 4):(45‑55):(25‑30)：(160‑170).This method is simple, efficient, limits to from region, is greatly improved to Cd2+The reparation power of contaminated soil.
Description
Technical field
The invention belongs to the technical field of remediation contaminated soil, it is related to Cd2+The reparation of contaminated soil, and in particular to nanometer two
Titanium oxide is used for the method for soil remediation.
Background technology
Soil is one of main resource for the survival of mankind, Cd2+It is one of most important pollutant of soil, in soil
Cd2+Pollution comes from mining, smelting, municipal refuse, chemical fertilizer impurity and sewage deposit etc., Cd2+High enrichment in the soil is direct
Influence the yield of cereal and make its quality decline, while Cd2+Human health can be endangered by food chain after contaminated soil.Thus,
To Cd2+The repairing and treating technology of contaminated soil is as one of the research hotspot in chemistry for environmental engineering field.At present, to Cd2+It is dirty
The soil of dye can be carried out by the methods of physics, chemistry, phytoremediation and microorganism remediation technology.Wherein phytoremediation technology is
Preferably a kind of Treatment process of Impacts on ecology and environment at present, but be that repairing efficiency is veryer long the shortcomings that its maximum.
Phytoremediation technology is soil pollution caused by repairing and eliminating inorganic waste using plant, and metallic pollution is native
The phytoremediation technology of earth refers to using phytoremediation and eliminates the soil environment dirt as caused by organic poison and inorganic waste
Dye, be it is a kind of using nature growing plant or the technology general name of hereditary soil Cheng Peiyu phytoremediation metallic pollution soil environments, it
It is to remove, volatilize or stable soil environmental contaminants by botanical system and its rhizosphere microorganism group.Phytoremediation includes
Plant absorption, phytovolatilization and plant are fixed, and the phytoremediation technology of heavy metal classes pollution can by the mechanism and process of its reparation
It is divided into three kinds of major ways such as plant extract, phytovolatilization, plant stability.
But existing Cd2+The phytoremediation technology of contaminated soil has some limitations, such as the phytoremediation duration
Long, slowly effect.
Therefore, a kind of efficiently rehabilitating soil Cd is developed2+The technology of pollution is current assistant officer problem to be solved, the solution of the problem
Certainly important influence meaning will be produced to the sustainable development of environment.
The content of the invention
The present invention is to solve the above problems, provide a kind of method of nano-titanium dioxide for soil remediation, this method
Simply, efficiently, limit to from region, be greatly improved to Cd2+The reparation power of contaminated soil.
The present invention is to realize that the technical solution that its purpose uses is：
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Sunflower is planted in contaminated soil, in sunflower
The mixed solution being made of in growth cycle to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, xylitol, water, the chlorine
It is (2-4) to change lanthanum, titanium dioxide, xylitol, the mass ratio of water:(45-55):(25-30)：(160-170).
Risen under sunflower kind and proceed by within the 15th day sprinkling, the sprinkling cycle is 5-15 days, i.e., sprayed one every 5-15 days
It is secondary.
The fountain height control of mixed solution is as follows in per acre：From under seed kind, growth number of days is 15-30 days, sprinkling
Measure as 5-6 kgs/acre；It is 31-45 days to grow number of days, and fountain height is 8-9 kgs/acre；It is 46-60 days to grow number of days, fountain height
For 10-11 kgs/acre；It is 61-75 days to grow number of days, and fountain height is 16-17 kgs/acre；It is 76-100 days to grow number of days, sprinkling
Measure as 18-19 kgs/acre.
The planting density of sunflower is line-spacing 60-80cm, spacing in the rows 40-60cm.
The beneficial effects of the invention are as follows：
The present invention within the breeding time of sunflower by spraying the mixing being made of lanthanum chloride, titanium dioxide, xylitol, water
Solution so that the plant scale of construction of sunflower increases substantially, and increases substantially to Cd2+Enriching quantity, realization efficiently remove Cd2+。
The present invention promotes the photosynthesis of plant by titanium dioxide, and the titanium dioxide of La doped is formed by adding lanthanum chloride
Titanium can be such that sensing light is shifted from ultraviolet light to visible ray, improve the utilization rate of light, so as to improve the plant of sunflower
Amount.
The addition xylitol of the invention is compounded with lanthanum chloride, titanium dioxide, improves the absorption effect of plant cadmium
Rate, the addition of xylitol can also promote sunflower cell to participate in metabolic activity, improve the vitality of sunflower, promote sunflower
The synthesis of root secretion, further improves to Cd2+Absorption, make to Cd2+Absorption be easier spontaneous generation.
Embodiment
Growth cycle described in the present invention refer under kind to gather in this process, close specific embodiment the present invention is made into
The explanation of one step.
First, specific embodiment
Embodiment 1
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+ contaminated soils on plant sunflower, line-spacing 60cm,
Spacing in the rows 40cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 3:50:30:167.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 5 days, that is, when growing number of days 20 days,
Spray again, fountain height is 5 kgs/acre；Then after 5 days, that is, number of days 25 is grown, is sprayed again, fountain height is 5 kgs/acre；
Then after 5 days, that is, when growing number of days 30 days, spray again, fountain height is 6 kgs/acre；Then after 5 days, that is, number of days is grown
At 35 days, spray again, fountain height is 8 kgs/acre；Then after 5 days, that is, when growing number of days 40 days, spray again, fountain height
For 8 kgs/acre；Then after 5 days, that is, when growing number of days 45 days, spray again, fountain height is 9 kgs/acre；Then after 5
My god, that is, when growing number of days 50 days, spray again, fountain height is 10 kgs/acre；Then after 5 days, that is, when growing number of days 55 days,
Spray again, fountain height is 10 kgs/acre；Then after 5 days, that is, when growing number of days 60 days, spray again, fountain height is public for 11
Pound/acre；Then after 5 days, that is, when growing number of days 65 days, spray again, fountain height is 16 kgs/acre；Then after 5 days, i.e.,
When growing number of days 70 days, spray again, fountain height is 16 kgs/acre；Then after 5 days, that is, when growing number of days 75 days, spray again
Spill, fountain height is 17 kgs/acre；Then after 5 days, that is, when growing number of days 80 days, spray again, fountain height is 18 kgs/acre；
Then after 5 days, that is, when growing number of days 90 days, spray again, fountain height grows number of days for 18 kgs/acre and then after 5 days
At 95 days, spray again, fountain height is 19 kgs/acre, afterwards, is no longer sprayed, until harvesting.
Embodiment 2
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Plant sunflower in contaminated soil, line-spacing 70cm,
Spacing in the rows 50cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 2:45:29:160.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 15 days, that is, number of days is grown 30 days
When, spray again, fountain height is 6 kgs/acre；Then after 15 days, that is, number of days 45 is grown, is sprayed again, fountain height is public for 9
Pound/acre；Then after 15 days, that is, when growing number of days 60 days, spray again, fountain height is 11 kgs/acre；Then after 15 days,
When growing number of days 75 days, spray again, fountain height is 17 kgs/acre；Then after 15 days, that is, when growing number of days 90 days, then
Secondary sprinkling, fountain height are 18 kgs/acre, afterwards, are no longer sprayed, until harvesting.
Embodiment 3
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Plant sunflower in contaminated soil, line-spacing 80cm,
Spacing in the rows 60cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 3:47:28:165.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 10 days, that is, number of days is grown 25 days
When, spray again, fountain height is 6 kgs/acre；Then after 10 days, that is, number of days 35 is grown, is sprayed again, fountain height is public for 8
Pound/acre；Then after 10 days, that is, when growing number of days 45 days, spray again, fountain height is 9 kgs/acre；Then after 10 days, i.e.,
When growing number of days 55 days, spray again, fountain height is 10 kgs/acre；Then after 10 days, that is, when growing number of days 65 days, again
Sprinkling, fountain height are 16 kgs/acre；Then after 10 days, that is, when growing number of days 75 days, spray again, fountain height for 17 kilograms/
Mu, then after 10 days, that is, when growing number of days 85 days, sprays, fountain height is 19 kgs/acre, afterwards, is no longer sprayed, directly again
To harvesting.
Embodiment 4
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Plant sunflower in contaminated soil, line-spacing 60cm,
Spacing in the rows 40cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 4:55:25:170.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 7 days, that is, when growing number of days 22 days,
Spray again, fountain height is 5 kgs/acre；Then after 7 days, that is, number of days 29 is grown, is sprayed again, fountain height is 6 kgs/acre；
Then after 7 days, that is, when growing number of days 36 days, spray again, fountain height is 8 kgs/acre；Then after 7 days, that is, number of days is grown
At 43 days, spray again, fountain height is 9 kgs/acre；Then after 7 days, that is, when growing number of days 50 days, spray again, fountain height
For 10 kgs/acre, then after 7 days, that is, when growing number of days 57 days, spray again, fountain height is 11 kgs/acre；Then after 7
My god, that is, when growing number of days 64 days, spray again, fountain height is 16 kgs/acre；Then after 7 days, that is, when growing number of days 71 days,
Spray again, fountain height is 17 kgs/acre；Then after 7 days, that is, when growing number of days 78 days, spray again, fountain height is public for 18
Pound/acre；Then after 7 days, that is, when growing number of days 85 days, spray again, fountain height is 19 kgs/acre；Then after 7 days, i.e.,
When growing number of days 92 days, spray again, fountain height is 19 kgs/acre, afterwards, is no longer sprayed, until harvesting.
Embodiment 5
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Plant sunflower in contaminated soil, line-spacing 60cm,
Spacing in the rows 40cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 2.5:53:26:163.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 7 days, that is, when growing number of days 22 days,
Spray again, fountain height is 5 kgs/acre；Then after 7 days, that is, number of days 29 is grown, is sprayed again, fountain height is 6 kgs/acre；
Then after 7 days, that is, when growing number of days 36 days, spray again, fountain height is 8 kgs/acre；Then after 7 days, that is, number of days is grown
At 43 days, spray again, fountain height is 9 kgs/acre；Then after 7 days, that is, when growing number of days 50 days, spray again, fountain height
For 10 kgs/acre, then after 7 days, that is, when growing number of days 57 days, spray again, fountain height is 11 kgs/acre；Then after 7
My god, that is, when growing number of days 64 days, spray again, fountain height is 16 kgs/acre；Then after 7 days, that is, when growing number of days 71 days,
Spray again, fountain height is 17 kgs/acre；Then after 7 days, that is, when growing number of days 78 days, spray again, fountain height is public for 18
Pound/acre；Then after 7 days, that is, when growing number of days 85 days, spray again, fountain height is 19 kgs/acre；Then after 7 days, i.e.,
When growing number of days 92 days, spray again, fountain height is 19 kgs/acre, afterwards, is no longer sprayed, until harvesting.
Embodiment 6
Nano-titanium dioxide is used for the method for soil remediation, to Cd2+Plant sunflower in contaminated soil, line-spacing 60cm,
Spacing in the rows 40cm, is periodically made of in the growth cycle of sunflower to sprinkling on sunflower blade face lanthanum chloride, titanium dioxide, water
Mixed solution, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are 3.5:50:27:168.
Sprayed since under kind the 15th day, fountain height is 5 kgs/acre；Then after 15 days, that is, number of days is grown 30 days
When, spray again, fountain height is 6 kgs/acre；Then after 15 days, that is, number of days 45 is grown, is sprayed again, fountain height is public for 9
Pound/acre；Then after 15 days, that is, when growing number of days 60 days, spray again, fountain height is 11 kgs/acre；Then after 15 days,
When growing number of days 75 days, spray again, fountain height is 17 kgs/acre；Then after 15 days, that is, when growing number of days 90 days, then
Secondary sprinkling, fountain height are 18 kgs/acre, afterwards, are no longer sprayed, until harvesting.
2nd, application test
1st, experimental plot：The electrodeless counties and cities village of Shijiazhuang City (soil leather is seriously polluted, and chromium content is high), period of supervision is to day
1. 2. 3. 4. 5. 6. 7. a growth cycle for certain herbaceous plants with big flowers, 9 pieces of experimental plot, experimental plot numbering are respectively that, every piece of experimental plot plants 100 plants
Sunflower.Sunflower blade face is respectively sprayed by the different cycles that sprays in experimental plot, is 1. 2. 3. lanthanum chloride, titanium dioxide
Titanium, xylose alcohol and water are with mass ratio 3：50：30：167 carry out foliage-spray, 4. 5. 6. using the mass ratio of lanthanum chloride and water as 53：
167 carry out foliage-spray.Different spray patterns survey data, and it is as shown in the table, 7. experiment is not spray titania-doped blank
Experimental plot.As a result referring to table 1.
Table 1
Results and discussion：
As can be seen from the table：
(1) sunflower of lanthanum chloride has been sprayed, the plant scale of construction is bigger than what is do not sprayed, and lanthanum chloride has plant growth promotion to make
With.
(2) lanthanum chloride and titanium dioxide mix the independent lanthanum chloride of sunflower ratio sprayed big, this explanation lanthanum chloride that sprays the scale of construction
Simple lanthanum chloride can more promote the photosynthesis of plant with titanium dioxide synergy ratio.
(3) no matter single lanthanum chloride, or lanthanum chloride and titanium dioxide synergy, it is to spray for 7 days to spray the cycle
Mode, the growth rate of plant is all highest, is respectively 41.83% and 61.59%.
(4) sunflower unit is inhaled cadmium amount and is improved：The present invention adds xylitol and is compounded with lanthanum chloride, titanium dioxide, improves
Concentration coefficient, transhipment coefficient etc. cause sunflower unit to inhale cadmium amount and become larger, and spray the mode that sprays that the cycle is 7 days, and unit inhales cadmium
Amount improves 34.5%.
(5) mode that sprays that the cycle is 7 days is sprayed, is with pedological unit cadmium content highest reduction amount after reparation before repairing
49.2%.
Claims (4)
1. nano-titanium dioxide is used for the method for soil remediation, to Cd2+Sunflower is planted in contaminated soil, it is characterised in that：
It is molten to the mixing that is made of lanthanum chloride, titanium dioxide, xylitol, water is sprayed on sunflower blade face in the growth cycle of sunflower
Liquid, the lanthanum chloride, titanium dioxide, xylitol, the mass ratio of water are (2-4):(45-55):(25-30)：(160-170).
2. nano-titanium dioxide according to claim 1 is used for the method for soil remediation, it is characterised in that：In sunflower kind
Under rise and proceed by within the 15th day sprinkling, the sprinkling cycle is 5-15 days.
3. nano-titanium dioxide according to claim 1 is used for the method for soil remediation, it is characterised in that：Mixed in per acre
The fountain height control for closing solution is as follows：From under seed kind, growth number of days is 15-30 days, and fountain height is 5-6 kgs/acre；Growth
Number of days is 31-45 days, and fountain height is 8-9 kgs/acre；It is 46-60 days to grow number of days, and fountain height is 10-11 kgs/acre；Growth
Number of days is 61-75 days, and fountain height is 16-17 kgs/acre；It is 76-100 days to grow number of days, and fountain height is 18-19 kgs/acre.
4. nano-titanium dioxide according to claim 1 is used for the method for soil remediation, it is characterised in that：The kind of sunflower
Density in planting is line-spacing 60-80cm, spacing in the rows 40-60cm.
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Citations (7)
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2017
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