CN105363768A - Application for repairing lead-polluted soil by callistephus chinensis and organic phosphonic acid - Google Patents
Application for repairing lead-polluted soil by callistephus chinensis and organic phosphonic acid Download PDFInfo
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- CN105363768A CN105363768A CN201510906971.7A CN201510906971A CN105363768A CN 105363768 A CN105363768 A CN 105363768A CN 201510906971 A CN201510906971 A CN 201510906971A CN 105363768 A CN105363768 A CN 105363768A
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- china aster
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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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- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a plant repair enhancement technology of lead-polluted soil, in particular to application for repairing heavy metal lead-polluted soil by using 1-hydroxyethylidene-1,1-diphosphonic acid-enhanced and enriched plant callistephus chinensis. The callistephus chinensis is planted on the soil containing pollutant lead; when the plant grows to the mature period, 1-hydroxyethylidene-1,1-diphosphonic acid is applied to the soil for activating the lead in the soil; most lead in the polluted soil is absorbed through the root system of the callistephus chinensis, and is transferred to an organ above the ground; and the organ of the plant above the ground is shifted away from the polluted soil to realize the purpose of removing the pollutant lead from the soil. The 1-hydroxyethylidene-1,1-diphosphonic acid-enhanced and enriched plant callistephus chinensis is used for treating the lead-polluted soil; and such advantages as strong operability and prevention of wind erosion and water erosion of the polluted soil are achieved.
Description
Technical field
The present invention relates to lead-contaminated soil phytoremediation technology, is exactly that a kind of HEDP that utilizes strengthens the application of enriching plant China aster in remediating lead-contaminated soil strictly speaking.
Background technology
Lead is one of a kind of main heavy metal contaminants in environment, and China and all over the world ubiquity Lead Pollution in Soil situation, especially around mine, smeltery and highway, Situation of Lead Pollution is even more serious.Plumbous once after entering human body, by the normal work by blood interference nerve cell, destroy the existence of ferroheme and the permeability of cerebral microvascular in blood, brain development can be caused slow, unsound, the final intelligence affecting people, therefore to improvement and the reparation of lead-contaminated soil, be very urgent task.
Phytoremediation technology of polluted soil low cost, not damage field ground structure, do not cause groundwater environment secondary pollution, beautify the environment, be easy to, by society is accepted, become the focus problem in science outside Present Domestic and forward position research direction.Nowadays, the requirement of people to environment is higher, not only will meet human settlements requirement, but also will reach certain Aesthetic Standards, while reduction level of pollution, also wishes to see beautifying of contaminated environment, and the flower plant first-selection that yes beautifies the environment.China's Of Flower Resources enriches, and particularly one, biennial herb flowers, of a great variety, widely distributed, cultivation history is long, and cultivation condition is clear and definite, has the features such as and good resistance not tight to the requirement such as water, fertilizer.
But the plant even remediation efficiency of hyperaccumulative plant of the tool heavy metal hyperaccumulative feature screened need to improve.It is found that the chelation evoked recovery technique of plant can increase the concentration of available heavy metal in the soil liquid, improve absorption and the accumulation ability of plant heavy metal, improve remediation efficiency.The chelating agent that prior art generally uses is EDTA, although EDTA chelating lead is very capable, not easily degrades after its entered environment, can cause serious heavy metal diafiltration, cause the secondary pollution to environment such as surface water and groundwaters.Therefore, one of emphasis of present stage chelation evoked reparation selects comparatively ideal chelating agent, both ensured repairing effect, and can reduce the environmental risk that may cause and health hazard again.
HEDP is the compound having one or more phosphonyl group in molecule, because organic phospho acid compounds can generate stable chelate with contents of many kinds of heavy metal ion within the scope of wider pH, and toxicity is little, synthetic method is simple, raw material is easy to get, cheap, the organic phospho acid quasi-chelate compound of generation is easy to be biodegradable, and in succession obtains the attention of various countries.But organic phospho acid is just applied to the industries such as water treatment at present, lacks the correlative study in soil remediation.
Summary of the invention
The invention provides a kind of workable and preventing pollution soil drifting, water erosion are all had to the method for the improvement lead-contaminated soil of good effect, i.e. China aster and the organic phospho acid application in remediating lead-contaminated soil.
In order to realize foregoing invention object, the technical solution used in the present invention is as follows:
The grown on soil China aster containing pollutant lead, when plant grows to the maturity period, HEDP is applied in soil, lead in activating soil, absorbed the lead in contaminated soil by China aster root system in a large number, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
Described when plant grows to the maturity period, in soil, apply HEDP, the molar concentration rate of HEDP and Pb in Soil is 1:2.
The China aster planted to refer on soil directly sowing China aster seed or be transplanted in lead-contaminated soil by the China aster of Seedling Stage.
Describedly in lead-contaminated soil, plant China aster, take the mode of multiple cropping, namely first batch of China aster grow to biomass maximum time, plant shoot organ is removed from contaminated soil, then repeats said process, until final remediating lead-contaminated soil.
Experiment proves that HEDP can efficient hardening China aster remediating lead-contaminated soil.The present invention, by planting China aster on lead-contaminated soil, utilizes HEDP as external source hardening agent, at stable lead-contaminated soil, can reduce the soil erosion and while not causing underground water secondary pollution, make lead-contaminated soil repaired.Compared with prior art, neither destroy the soil texture in existing lead contamination soil, greatly improve remediation efficiency again.
Detailed description of the invention
The grown on soil China aster containing pollutant lead, when plant grows to the maturity period, HEDP is applied in soil, lead in activating soil, absorbed the lead in contaminated soil by China aster root system in a large number, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
Described when plant grows to the maturity period, in soil, apply HEDP, the molar concentration rate of HEDP and Pb in Soil is 1:2.
The China aster planted to refer on soil directly sowing China aster seed or be transplanted in lead-contaminated soil by the China aster of Seedling Stage.
Describedly in lead-contaminated soil, plant China aster, take the mode of multiple cropping, namely first batch of China aster grow to biomass maximum time, plant shoot organ is removed from contaminated soil, then repeats said process, until final remediating lead-contaminated soil.
Embodiment 1
In experiment soil, Pb adds concentration is 1000mgkg
-1, be 2 times of national soil environment quality grade III Standard, the Heavy Metals added is Pb (NO
3)
2, be AR, join in soil with solid-state, fully mix, balance stand-by after one month.
Pot flowers is China aster, grows after 5-6 sheet leaf be transplanted in above-mentioned process soil until seedling.3, every basin, repeats for 3 times.Water according to soil lack of water situation, make soil moisture content remain on about 70% of field capacity.
After plant maturation, gather in the crops in front 1 circumferential soil and apply HEDP, the 1:4 (H1) be respectively with P in soil b molar concentration rate, 1:2 (H2), 1:1 (H3), 2:1 (H4), arrange and do not add chelating agent contrast (H0).
The plant sample of results is divided into root and overground part, fully rinse to remove with running water and adhere to earth on plant sample and dirt, and then with deionized water rinsing, drain moisture, complete 30min at 105 DEG C, then dry to constant weight at 70 DEG C, weigh up the dry weight of every Plants each several part with electronic analytical balance, the plant sample after weighing is pulverized for subsequent use.Adopt HNO
3-HClO
4method digestion (the two volume ratio is 87%:13%), measures the content of beary metal in plant sample with atomic absorption spectrophotometer (AAS, Hitachi180-80).
Remediation efficiency refers to that unit interval implants is extracted from contaminated soil, the pollution element of removal accounts for the percentage of this element total amount in soil within the scope of root system of plant, that is:
Remediation efficiency=plant shoot absorbs elements in Soil total amount × 100% within the scope of element total amount/root system
Experimental result is as follows:
As can be seen from Table 1, because HEDP adds in soil after China aster maturation, the upperground part biomass is less by the impact of soil HEDP.Along with the rising adding concentration, its the upperground part biomass declines to some extent, but respectively process and contrast all without significant difference (p>0.05), therefore in the present invention, the dosing method of HEDP is reasonable, less to the growth effect of plant.
Under the process of different HEDP concentration, the amount that China aster absorbs Pb increases along with the rising adding HEDP concentration in soil.In soil, HEDP is 1:2 with plumbous molar concentration rate, China aster overground part Pb content reaches maximum 1772.33mgkg
-1, remediation efficiency the highest (2.67%), is 8.3 times of contrast.HEDP concentration continues to raise, and China aster absorbs plumbous amount and starts to decline, and remediation efficiency reduces.
Therefore, Lead In Soil concentration is 1000mgkg
-1, the optimum molar concentration ratio of HEDP and Lead In Soil is 1:2, and the remediation efficiency of China aster reaches the highest.
Embodiment 2
In experiment soil, Pb adds concentration is 3000mgkg
-1, be 6 times of national soil environment quality grade III Standard, the Heavy Metals added is Pb (NO
3)
2, be AR, join in soil with solid-state, fully mix, balance stand-by after one month.
Pot flowers is China aster, grows after 5-6 sheet leaf be transplanted in above-mentioned process soil until seedling.3, every basin, repeats for 3 times.Water according to soil lack of water situation, make soil moisture content remain on about 70% of field capacity.
After plant maturation, gather in the crops in front 1 circumferential soil and apply HEDP, the 1:4 (H1) be respectively with P in soil b molar concentration rate, 1:2 (H2), 1:1 (H3), 2:1 (H4), arrange and do not add chelating agent contrast (H0).
The plant sample of results is divided into root and overground part, fully rinse to remove with running water and adhere to earth on plant sample and dirt, and then with deionized water rinsing, drain moisture, complete 30min at 105 DEG C, then dry to constant weight at 70 DEG C, weigh up the dry weight of every Plants each several part with electronic analytical balance, the plant sample after weighing is pulverized for subsequent use.Adopt HNO
3-HClO
4method digestion (the two volume ratio is 87%:13%), measures the content of beary metal in plant sample with atomic absorption spectrophotometer (AAS, Hitachi180-80).
Experimental result is as follows:
As can be seen from Table 2, when Lead In Soil concentration is 3000mgkg
-1, the upperground part biomass is less by the impact of soil HEDP concentration.Because HEDP adds in soil after China aster maturation, along with the rising adding concentration, its upperground part biomass declines to some extent, but respectively processes and contrast all without significant difference (p>0.05).
Under the process of different HEDP concentration, the amount that China aster absorbs Pb increases along with the rising adding HEDP concentration in soil.In soil, HEDP is 1:2 with plumbous molar concentration rate, China aster overground part Pb content reaches maximum 5366.54mgkg
-1, remediation efficiency the highest (2.57%), is 8.7 times of contrast.HEDP concentration continues to raise, and China aster absorbs plumbous amount and starts to decline, and remediation efficiency reduces.
Therefore, Lead In Soil concentration is 3000mgkg
-1, the optimum molar concentration ratio of HEDP and Lead In Soil is 1:2, and the remediation efficiency of China aster reaches the highest.
(Pb concentration is 1000mgkg in the effect of table 1 HEDP strengthening China aster enriched lead
-1)
(Pb concentration is 3000mgkg in the effect of table 2 HEDP strengthening China aster enriched lead
-1)
Claims (4)
1. China aster and the organic phospho acid application in remediating lead-contaminated soil, it is characterized in that: the grown on soil China aster containing pollutant lead, when plant grows to the maturity period, in soil, apply HEDP, the lead in activating soil, absorbed the lead in contaminated soil by China aster root system in a large number, and transfer them to overground part organ, when plant grow to the upperground part biomass maximum time, plant shoot organ is removed from contaminated soil, thus realizes the object of removing pollutant in soil lead.
2. China aster according to claim 1 and the organic phospho acid application in remediating lead-contaminated soil, it is characterized in that described when plant grows to the maturity period, in soil, apply HEDP, the molar concentration rate of HEDP and Pb in Soil is 1:2.
3. China aster and the organic phospho acid application in remediating lead-contaminated soil, is characterized in that planted China aster to refer on soil directly sowing China aster seed or be transplanted in lead-contaminated soil by the China aster of Seedling Stage.
4. China aster and the organic phospho acid application in remediating lead-contaminated soil, in lead-contaminated soil, China aster is planted described in it is characterized in that, take the mode of multiple cropping, namely first batch of China aster grow to biomass maximum time, plant shoot organ is removed from contaminated soil, repeat said process again, until final remediating lead-contaminated soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510906971.7A CN105363768A (en) | 2015-12-09 | 2015-12-09 | Application for repairing lead-polluted soil by callistephus chinensis and organic phosphonic acid |
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|---|---|---|---|
| CN201510906971.7A CN105363768A (en) | 2015-12-09 | 2015-12-09 | Application for repairing lead-polluted soil by callistephus chinensis and organic phosphonic acid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2001976A1 (en) * | 1988-11-01 | 1990-05-01 | Earl P. Horwitz | Phosphonic acids and their uses in separation |
| CN101524702A (en) * | 2009-04-21 | 2009-09-09 | 辽宁石油化工大学 | Method for restoring lead polluted soil by in-situ strengthening plant |
| CN103586276A (en) * | 2013-11-25 | 2014-02-19 | 辽宁石油化工大学 | Drip washing method for remedying cadmium-contaminated soil |
| CN103639190A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring lead polluted soil with amino trimethylene phosphonic acid (ATMP) |
| CN104014586A (en) * | 2014-06-20 | 2014-09-03 | 北京矿冶研究总院 | Method for restoring copper-polluted soil by using chelating agent to induce typha orientalis L |
| CN104889147A (en) * | 2014-12-04 | 2015-09-09 | 辽宁石油化工大学 | Application of Callistephus chinensis in restoration of lead-contaminated soil |
-
2015
- 2015-12-09 CN CN201510906971.7A patent/CN105363768A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2001976A1 (en) * | 1988-11-01 | 1990-05-01 | Earl P. Horwitz | Phosphonic acids and their uses in separation |
| CN101524702A (en) * | 2009-04-21 | 2009-09-09 | 辽宁石油化工大学 | Method for restoring lead polluted soil by in-situ strengthening plant |
| CN103586276A (en) * | 2013-11-25 | 2014-02-19 | 辽宁石油化工大学 | Drip washing method for remedying cadmium-contaminated soil |
| CN103639190A (en) * | 2013-12-17 | 2014-03-19 | 辽宁石油化工大学 | Method for restoring lead polluted soil with amino trimethylene phosphonic acid (ATMP) |
| CN104014586A (en) * | 2014-06-20 | 2014-09-03 | 北京矿冶研究总院 | Method for restoring copper-polluted soil by using chelating agent to induce typha orientalis L |
| CN104889147A (en) * | 2014-12-04 | 2015-09-09 | 辽宁石油化工大学 | Application of Callistephus chinensis in restoration of lead-contaminated soil |
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Application publication date: 20160302 |