CN105363775A - Application for repairing lead-polluted soil by chemical-enhanced flower plants - Google Patents
Application for repairing lead-polluted soil by chemical-enhanced flower plants Download PDFInfo
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- CN105363775A CN105363775A CN201510907440.XA CN201510907440A CN105363775A CN 105363775 A CN105363775 A CN 105363775A CN 201510907440 A CN201510907440 A CN 201510907440A CN 105363775 A CN105363775 A CN 105363775A
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- soil
- lead
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- contaminated soil
- tricarboxylic acid
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Health & Medical Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Molecular Biology (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to application for repairing lead-polluted soil by chemical-enhanced flower plants, in particular to application for repairing heavy metal lead-polluted soil by using dibenzyloxyphosphoiyl butane tricarboxylic acid-enhanced and enriched plant petunia hybrida. The petunia hybrida is planted on the soil containing pollutant lead; when the plant grows to the mature period, dibenzyloxyphosphoiyl butane tricarboxylic 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 petunia hybrida, 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 dibenzyloxyphosphoiyl butane tricarboxylic acid-enhanced and enriched plant petunia hybrida 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 phosphonobutane tricarboxylic acid of utilization strengthens the application of enriching plant green winter eggplant 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.
Phosphonobutane tricarboxylic acid 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. the application of chemical enhanced flower plant 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 green winter eggplant containing pollutant lead; when plant grows to the maturity period; phosphonobutane tricarboxylic acid is applied in soil; lead in activating soil; absorbed the lead in contaminated soil by green winter eggplant 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 phosphonobutane tricarboxylic acid, the molar concentration rate of phosphonobutane tricarboxylic acid and Pb in Soil is 1:2.
Green winter eggplant of planting to refer to that on soil the direct green winter eggplant seed of sowing or the green winter eggplant by Seedling Stage are transplanted in lead-contaminated soil.
Describedly in lead-contaminated soil, plant green winter eggplant, the mode of multiple cropping can be taked, namely first batch green winter eggplant 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 phosphonobutane tricarboxylic acid can efficient hardening green winter eggplant remediating lead-contaminated soil.The present invention, by planting green winter eggplant on lead-contaminated soil, utilizes phosphonobutane tricarboxylic acid 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 green winter eggplant containing pollutant lead; when plant grows to the maturity period; phosphonobutane tricarboxylic acid is applied in soil; lead in activating soil; absorbed the lead in contaminated soil by green winter eggplant 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 phosphonobutane tricarboxylic acid, the molar concentration rate of phosphonobutane tricarboxylic acid and Pb in Soil is 1:2.
Green winter eggplant of planting to refer to that on soil the direct green winter eggplant seed of sowing or the green winter eggplant by Seedling Stage are transplanted in lead-contaminated soil.
Describedly in lead-contaminated soil, plant green winter eggplant, the mode of multiple cropping can be taked, namely first batch green winter eggplant 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 green winter eggplant, 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 phosphonobutane tricarboxylic acid; the 1:4 (P1) be respectively with P in soil b molar concentration rate, 1:2 (P2), 1:1 (P3), 2:1 (P4), arrange and do not add chelating agent contrast (P0).
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 phosphonobutane tricarboxylic acid adds in soil after green winter eggplant maturation, the upperground part biomass is less by the impact of soil phosphonobutane tricarboxylic acid.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 phosphonobutane tricarboxylic acid is reasonable, less to the growth effect of plant.
Under the process of different phosphonobutane tricarboxylic acid's concentration, the amount of green winter eggplant absorption Pb increases along with the rising adding phosphonobutane tricarboxylic acid's concentration in soil.In soil, phosphonobutane tricarboxylic acid is 1:2 with plumbous molar concentration rate, green winter eggplant overground part Pb content reaches maximum 1772.55mgkg
-1, remediation efficiency the highest (1.74%), is 8.9 times of contrast.Phosphonobutane tricarboxylic acid's concentration continues to raise, and the amount of green winter eggplant absorption lead starts to decline, and remediation efficiency reduces.
Therefore, Lead In Soil concentration is 1000mgkg
-1, the optimum molar concentration ratio of phosphonobutane tricarboxylic acid and Lead In Soil is 1:2, and green winter remediation efficiency of eggplant 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 green winter eggplant, 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 phosphonobutane tricarboxylic acid; the 1:4 (P1) be respectively with P in soil b molar concentration rate, 1:2 (P2), 1:1 (P3), 2:1 (P4), arrange and do not add chelating agent contrast (P0).
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 phosphonobutane tricarboxylic acid concentration.Because phosphonobutane tricarboxylic acid adds in soil after green winter eggplant 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 phosphonobutane tricarboxylic acid's concentration, the amount of green winter eggplant absorption Pb increases along with the rising adding phosphonobutane tricarboxylic acid's concentration in soil.In soil, phosphonobutane tricarboxylic acid is 1:2 with plumbous molar concentration rate, green winter eggplant overground part Pb content reaches maximum 5513.35mgkg
-1, remediation efficiency the highest (1.76%), is 8.8 times of contrast.Phosphonobutane tricarboxylic acid's concentration continues to raise, and the amount of green winter eggplant absorption lead starts to decline, and remediation efficiency reduces.
Therefore, Lead In Soil concentration is 3000mgkg
-1, the optimum molar concentration ratio of phosphonobutane tricarboxylic acid and Lead In Soil is 1:2, and green winter remediation efficiency of eggplant reaches the highest.
Table 1 phosphonobutane tricarboxylic acid strengthens the effect of green winter eggplant enriched lead, and (Pb concentration is 1000mgkg
-1)
Table 2 phosphonobutane tricarboxylic acid strengthens the effect of green winter eggplant enriched lead, and (Pb concentration is 3000mgkg
-1)
Claims (4)
1. the application of chemical enhanced flower plant remediating lead-contaminated soil; it is characterized in that the grown on soil green winter eggplant containing pollutant lead; when plant grows to the maturity period; in soil, apply phosphonobutane tricarboxylic acid, the lead in activating soil, absorbed the lead in contaminated soil by green winter eggplant 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. the application of chemical enhanced flower plant remediating lead-contaminated soil according to claim 1; it is characterized in that described when plant grows to the maturity period; in soil, apply phosphonobutane tricarboxylic acid, the molar concentration rate of phosphonobutane tricarboxylic acid and Pb in Soil is 1:2.
3. the application of chemical enhanced flower plant remediating lead-contaminated soil according to claim 1, is characterized in that planted green winter eggplant to refer to that on soil the direct green winter eggplant seed of sowing or the green winter eggplant by Seedling Stage are transplanted in lead-contaminated soil.
4. the application of chemical enhanced flower plant remediating lead-contaminated soil according to claim 1, it is characterized in that described in lead-contaminated soil, planting green winter eggplant, take the mode of multiple cropping, namely first batch green winter eggplant 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 |
|---|---|---|---|
| CN201510907440.XA CN105363775A (en) | 2015-12-09 | 2015-12-09 | Application for repairing lead-polluted soil by chemical-enhanced flower plants |
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| CN201510907440.XA CN105363775A (en) | 2015-12-09 | 2015-12-09 | Application for repairing lead-polluted soil by chemical-enhanced flower plants |
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| CN105363775A true CN105363775A (en) | 2016-03-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552550A (en) * | 2017-09-29 | 2018-01-09 | 沈阳大学 | A kind of method that cadmium, lead-contaminated soil are repaired using root exudates fortification of plants |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4333490A1 (en) * | 1993-10-01 | 1995-04-13 | Dmt Gmbh | Process for soil remediation |
| JP2002143828A (en) * | 2000-11-09 | 2002-05-21 | Ichinomiya Kimitake | Countermeasure method for cleaning of soil and soil cleaning system |
| JP2004025070A (en) * | 2002-06-27 | 2004-01-29 | Kubota Corp | Cleaning method of polluted soil |
| CN101234391A (en) * | 2007-02-02 | 2008-08-06 | 中国科学院沈阳应用生态研究所 | Combined method for repairing lead pollution 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) |
| CN104607445A (en) * | 2014-12-04 | 2015-05-13 | 辽宁石油化工大学 | Application of petunia hybrid to restore lead-polluted soil |
-
2015
- 2015-12-09 CN CN201510907440.XA patent/CN105363775A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4333490A1 (en) * | 1993-10-01 | 1995-04-13 | Dmt Gmbh | Process for soil remediation |
| JP2002143828A (en) * | 2000-11-09 | 2002-05-21 | Ichinomiya Kimitake | Countermeasure method for cleaning of soil and soil cleaning system |
| JP2004025070A (en) * | 2002-06-27 | 2004-01-29 | Kubota Corp | Cleaning method of polluted soil |
| CN101234391A (en) * | 2007-02-02 | 2008-08-06 | 中国科学院沈阳应用生态研究所 | Combined method for repairing lead pollution 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) |
| CN104607445A (en) * | 2014-12-04 | 2015-05-13 | 辽宁石油化工大学 | Application of petunia hybrid to restore lead-polluted soil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552550A (en) * | 2017-09-29 | 2018-01-09 | 沈阳大学 | A kind of method that cadmium, lead-contaminated soil are repaired using root exudates fortification of plants |
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Application publication date: 20160302 |