CN102219343A - Method for removing toxic organic pollutants from sediment by using plant - Google Patents
Method for removing toxic organic pollutants from sediment by using plant Download PDFInfo
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- CN102219343A CN102219343A CN2011100617243A CN201110061724A CN102219343A CN 102219343 A CN102219343 A CN 102219343A CN 2011100617243 A CN2011100617243 A CN 2011100617243A CN 201110061724 A CN201110061724 A CN 201110061724A CN 102219343 A CN102219343 A CN 102219343A
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Abstract
The invention relates to a method for removing toxic organic pollutants from sediment by using a plant, which is characterized by selecting seedlings or mature seedlings of an emergent aquatic plant such as Scirpus validus Vahl with a strong absorption capacity to toxic organic pollutants in the sediment, wherein the seedlings with a height of 60 cm are preferably selected. The method provided by the invention has the advantages that: Scirpus validus Vahl has a good remediation effect on the pollution of pentachlorophenol and polybrominated diphenyl ethers and/or deca-brominated diphenyl ether in the sediment, can remove 99% of pentachlorophenol in the polluted sediment within 90 days, and can remove 37.44% of deca-brominated diphenyl ether within 180 days; meanwhile Scirpus validus Vahl has a strong absorption and enrichment capacity to pentachlorophenol and polybrominated diphenyl ethers and/or deca-brominated diphenyl ether in the polluted sediment, and the root of Scirpus validus Vahl has enrichment capability to pentachlorophenol and deca-brominated diphenyl ether up to 2090 mu g kg<-1>dw and 200 mu g kg<-1>dw or above respectively; and Scirpus validus Vahl is an excellent remediation plant for the toxic organic pollutants in water environment sediment and is also a wetland emergent aquatic plant with aesthetic value.
Description
Technical field
The present invention relates to the phytoremediation technology of contaminate environment, specifically is a kind of method of utilizing the waterplant Scirpus tabernaemontani to remove toxic organic pollutant in the settling.
Background technology
Along with the high speed development of modernization industry, that a lot of original natures do not have, the difficult toxic organic pollutant that decomposes, for example polycyclic arene compound, synthetic detergent, organochlorine pesticide, brominated flame-retardant etc. have been produced.These toxic organic pollutant toxicity are big, and chemical property is stable, and the residence time is long, and be soluble in the strong and enrichment in aquatic organism of fat, the property accumulated, its concentration can reach hundreds thousand of times in the water, not only influences hydrobiological procreation, and can be detrimental to health by food chain.
(Polybrominated diphenyl ethers PBDEs) is one of present topmost brominated flame-retardant to Poly Brominated Diphenyl Ethers, is extensively added in weaving, furniture, building materials, the vehicles, electronics and the electric equipment products.PBDEs ubiquity in surrounding medium comprises atmosphere, water, settling, soil, mud and various biological sample at present, and distribution range is extend over the entire globe almost, and concentration increases rapidly.PBDEs can cause that Tiroidina, internal secretion, the neural system of human body and organism is impaired.Pentachlorophenol (Pentachlorophenol, PCP) once worldwide used in a large number as agricultural chemicals and wood preservative, because of its to the broad spectrum toxicity of organism with lure mutagenicity, main persistence organic pollutant (POPs) and preferential one of the pollutent of monitoring of being considered to environment, though stop using substantially at present, but still have more serious PCP soil and sediment pollution, in surface water and groundwater environment, also detect the existence of PCP.
The water surrounding settling is the natural storehouse of accumulating of various toxic organic pollutants because PBDEs and PCP are the high hydrophobicity compounds, enter water surrounding after, be more prone to be assigned in the settling.Therefore countries in the world are polluted the settling toxic organic pollutant and are attached great importance to, and the improvement method of settling toxic pollutant has biological degradation method, active carbon adsorption, purge of gas method and burning method etc.For the improvement of pollution in wide area, physical chemistry methods such as charcoal absorption, purge of gas method, burning method implement difficulty big, site environment destroyed greatly, easily to produce secondary pollution, treatment cost too high, seldom be used.And persistence organic compound biological degradation difficulty, so implementation result is not good.Phytoremediation is a kind of soil that utilizes phytoremediation to be subjected to toxic metal, organism and radio contamination, settling, surface water and phreatic green technology, have cost low, do not destroy soil and river ecological environment, do not cause advantages such as secondary pollution.Since the nineties in 20th century, become the hot fields of poisonous Pollution abatement technical study.
Summary of the invention
The object of the present invention is to provide a kind of expense cheap, workable, do not destroy the settling physico-chemical property, do not cause that original position reparation secondary pollution, green receives the sedimental method of toxic pollution, i.e. the plant removal method of toxic organic pollutant in the settling.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of method of utilizing waterplant to remove toxic organic pollutant in the settling, containing toxic organic pollutant Pentachlorophenol (PCP) and Poly Brominated Diphenyl Ethers (PBDEs) or/and planting aquatic plants Scirpus tabernaemontani (S.validus Vahl) on the settling that decabromodiphenyl oxide (BDE-209) pollutes, utilize Scirpus tabernaemontani plant absorbing enriched toxic organic pollutant, and the Scirpus tabernaemontani root system causes the increase of microorganism in the rhizosphere settling and toxic organic pollutant in the settling of degrading, thereby realizes the purpose of removing toxic organic pollutant in the settling.
In the method for the present invention, described planting aquatic plants Scirpus tabernaemontani is that its Scirpus tabernaemontani sprigging is being contained toxic organic pollutant Pentachlorophenol and Poly Brominated Diphenyl Ethers or/and in the settling of decabromodiphenyl oxide.
In the method for the present invention, describedly contain planting aquatic plants Scirpus tabernaemontani on the settling of toxic pollutant, adopting cultivation in the open, keeping water layer to be higher than more than the settling 4cm.
In the method for the present invention, describedly containing planting aquatic plants Scirpus tabernaemontani on the settling of toxic pollutant, perhaps adopt the mode that repeats to gather in the crops, promptly when its Scirpus tabernaemontani grows to maturation, the part Scirpus tabernaemontani is connected the whole results of root to be removed, the amplification in the coming year of residue plant repeats this process, the toxic pollutant in thorough removal settling after growing up.
The advantage that the present invention had
The present invention utilizes waterplant Scirpus tabernaemontani (S.validus Vahl) to repair deposition species toxic pollutant (PCP, PBDEs, BDE-209), and its expense is cheap, exploitativeness by force, is not destroyed the settling physico-chemical property, do not cause secondary pollution, can realize the green reparation of original position.Experimental results show that waterplant Scirpus tabernaemontani (S.validus Vahl) can be in PCP, PBDEs, BDE-209 Marine sediments normal growth, and its root has good absorbing enriched effect for PCP, PBDEs, BDE-209, PCP in the settling, PBDEs, BDE-209 had removal effect preferably, the Scirpus tabernaemontani biomass is big, environmental compatibility strong, have certain aesthetic values, do not destroy in the time of the reparation of green original position and pollute on-the-spot settling structure, reduce rehabilitation expense greatly.
Description of drawings
Fig. 1 Scirpus tabernaemontani is to the removal efficiency curve of the PCP in the settling.
Fig. 2 Pentachlorophenol is in the intravital enrichment condition of waterplant Scirpus tabernaemontani.
Fig. 3 emergent Scirpus tabernaemontani is to the removal situation of the decabromodiphenyl oxide in three kinds of settlings.
Fig. 4 Scirpus tabernaemontani is to the absorbing enriched situation of the decabromodiphenyl oxide in the settling.
Embodiment
Embodiment 1
Pollute the research that lacks waterplant reparation (removal) at present settling PCP, adopt the test method of pond cultivation, the waterplant Scirpus tabernaemontani is studied remediation efficiency and the absorbing enriched ability of the PCP in the settling.
Test site is located at biological test site, garden (30 ° of 30 ' 40.79 " N; 114 ° 21 ' 15.14 " E), Central China Normal University school district. and testing used soil is biological garden, school district growing area PCP uncontaminated soil, after soil sample is gathered, remove stone and big foreign material, soil sample is treated to weigh, pulverize, sieve after dried fully.Get the soil sample 65kg after the above-mentioned processing, spray Pentachlorophenol mother liquor (200mgL by quality than quantitative and even in batches
-1, with the small amount of ethanol dissolving), making the original quality concentration in the soil is 2000 μ gkg
-1(in air-dry soil), treat solvent evaporates after, strengthen water gaging and repeatedly stir, be mixed into the sposh shape with stirrer, change over to again in the trial tank of 6m * 1m * 0.6m (spreading double-plastic in the pond) to prevent the seepage of Pentachlorophenol and moisture.Dui Zhao soil also makes in the same way and handles in addition.Treat that soil solidifies and transplant Scirpus tabernaemontani again after certain rigidity is arranged.
Test used Scirpus tabernaemontani and all pick up from Tang Xun lake, Wuhan (30 ° of 25 ' 17.17 " N, 114 ° 21 ' 51.24 " E).
This test designs 3 kinds of processing altogether: (1) plantation Scirpus tabernaemontani, do not add PCP (contrast 1) in the soil; (2) do not plant Scirpus tabernaemontani, be added with PCP (contrast 2) in the soil; (3) plantation Scirpus tabernaemontani, the interpolation initial concentration of PCP is 2000 μ gkg in the soil
-1(experimental group).Handle 4 of each samplings for every kind.Duration of test is kept moisture in the pond (water layer is higher than pedosphere 4cm).Carry out the residual quantity of Pentachlorophenol and the mensuration of plant physiology and biochemistry index at fetch earth respectively earth and Scirpus tabernaemontani sample of 0,30,60 and 90d of process of the test.
PCP content adopts gas chromatography determination in soil and the plant sample after pre-treatment.
Test-results is as follows:
Experimental result shows that it is 2000 μ gkg that PCP adds concentration
-1The time, the growth of Scirpus tabernaemontani is better, no plant death, and its over-ground part biomass (plant height) is decline (p＞0.05) compared with the control, illustrates that Scirpus tabernaemontani has certain resistance to PCP.
Fig. 1 has provided removal (reparation) efficient of Scirpus tabernaemontani to the PCP in the settling.After the settling Scirpus tabernaemontani was repaired experiment 30d, the residual rate of settling PCP was 28.3%, and control group is 96%; After the second month, the remaining rate of experimental group PCP is about 1%, and control group is 80%.After three month, experimental group residual rate 0.66%, control group are 70%.This shows that the waterplant Scirpus tabernaemontani has repair preferably to the PCP in the soil.
Fig. 2 has shown that PCP is in the intravital enrichment of waterplant Scirpus tabernaemontani.As can be seen from Figure 2, along with the passing of test period, the PCP content that the Scirpus tabernaemontani root is accumulated all reaches at 30d and is up to 2090 μ gkg
-1Begin to descend after reaching peak value, reach stable behind the 60d substantially, the PCP level also tends towards stability in the settling at this moment, and the two is synchronous.Greater than accretion rate, 30～60d accretion rate is greater than accumulative speed in the accumulative speed of 30d implants in explanation.
Embodiment 2
Pollute the research that lacks waterplant reparation (removal) at present settling PBDEs, adopt the test method of plant incubator cultivation, the waterplant Scirpus tabernaemontani is studied remediation efficiency and the absorbing enriched ability of the BDE-209 in the settling.
Test site is located in the greenhouse, Central China Normal University school district, and three kinds of settlings (mud, yellow mud, arenaceous sediment thing) pick up from the South Lake, Wuhan, after testing used settling and all not detecting the PBDEs. settling and gather, remove air-dry behind the foreign material, pulverize, sieve.Get each 10kg of above-mentioned settling, evenly spray BDE-209 (decabromodiphenyl oxide) to mother liquor (methylene dichloride dissolving), mix the back and not have the settling mixing that stirs of pollution, make three kinds of sedimental initial BDE-209 mass concentrations be respectively mud 1842.833 ± 244.801 μ gkg
-1Dw, yellow mud 1726.150 ± 196.006 μ gkg
-1Dw, arenaceous sediment thing 1756.267 ± 219.294 μ gkg
-1Get the 15kg Marine sediments that prepare and change in the plant incubator, the plantation Scirpus tabernaemontani.
Test used Scirpus tabernaemontani and all pick up from Tang Xun lake, Wuhan (30 ° of 25 ' 17.17 " N, 114 ° 21 ' 51.24 " E).
Fig. 3 shows that the waterplant Scirpus tabernaemontani has the excellent repairing effect to the decabromodiphenyl oxide (BDE-209) in three kinds of settlings.Repair after 180 days, BDE-209 concentration has reduced 13.567 ± 1.401% in the control group mud, and BDE-209 is because the plantation Scirpus tabernaemontani has reduced 37.437 ± 2.406% in the experimental group, and clearance significantly improves (p＜0.05).BDE-209 concentration has reduced 10.187 ± 1.125% in the control group yellow mud, and BDE-209 has reduced by 28.257 ± 2.584% (p＜0.05) in the experimental group.BDE-209 has reduced 8.983 ± 0.553% in the control group arenaceous sediment thing, and experimental group has reduced by 21.700 ± 2.241% (p＜0.05).The plantation of The above results explanation Scirpus tabernaemontani has promoted the removal (p＜0.05) of BDE-209 in three kinds of settlings greatly.
Fig. 4 shows that Scirpus tabernaemontani has good absorbing enriched effect to the decabromodiphenyl oxide in the settling (BDE-209).Scirpus tabernaemontani root enriching quantity reaches 301.361 ± 35.023 μ gkg in mud deposit
-1DW, maximum enrichment 67.425 ± 26.877 μ gkg of stem
-1DW.Scirpus tabernaemontani root enriching quantity reaches 220.021 ± 34.380 μ gkg in the yellow mud settling
-1DW, Scirpus tabernaemontani can be transmitted to root with top from root with BDE-209 simultaneously, maximum enrichment 64.490 ± 18.074 μ gkg of stem
-1DW.About 60d, reach 296.050 ± 63.979 μ gkg at arenaceous sediment thing root enriching quantity
-1DW, maximum enrichment 69.705 ± 18.859 μ gkg of stem
-1DW illustrates that Scirpus tabernaemontani not only can be by root absorbing enriched BDE-209 but also have the upwards ability of conduction from settling.
Claims (4)
1. method of utilizing waterplant to remove toxic organic pollutant in the settling, it is characterized in that: containing toxic organic pollutant Pentachlorophenol and Poly Brominated Diphenyl Ethers or/and planting aquatic plants Scirpus tabernaemontani on the decabromodiphenyl oxide contaminated settling, utilize Scirpus tabernaemontani plant absorbing enriched toxic organic pollutant, and the Scirpus tabernaemontani root system causes the increase of microorganism in the rhizosphere settling and toxic organic pollutant in the settling of degrading, thereby realizes the purpose of removing toxic organic pollutant in the settling.
2. the method for utilizing waterplant to remove toxic organic pollutant in the settling according to claim 1, it is characterized in that: described planting aquatic plants Scirpus tabernaemontani is that its Scirpus tabernaemontani sprigging is being contained toxic organic pollutant Pentachlorophenol and Poly Brominated Diphenyl Ethers or/and in the settling of decabromodiphenyl oxide.
3. the method for utilizing waterplant to remove toxic organic pollutant in the settling according to claim 1, it is characterized in that: describedly containing planting aquatic plants Scirpus tabernaemontani on the settling of toxic pollutant, adopt open-air cultivation, keep water layer to be higher than more than the settling 4cm.
4. the method for utilizing waterplant to remove toxic organic pollutant in the settling according to claim 1, it is characterized in that: describedly containing planting aquatic plants Scirpus tabernaemontani on the settling of toxic pollutant, perhaps adopt the mode that repeats to gather in the crops, when its Scirpus tabernaemontani grows to maturation, the part Scirpus tabernaemontani is connected the whole results of root to be removed, the amplification in the coming year of residue plant repeats this process, the toxic pollutant in thorough removal settling after growing up.
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| CN2011100617243A CN102219343A (en) | 2011-03-15 | 2011-03-15 | Method for removing toxic organic pollutants from sediment by using plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108658240A (en) * | 2018-06-28 | 2018-10-16 | 兰州城市学院 | The application of submerged plant phenol in absorbing water body |
| CN109513742A (en) * | 2018-12-21 | 2019-03-26 | 北京大学深圳研究生院 | A kind of biological renovation method of novel lasting organic pollutant |
| CN109570228A (en) * | 2018-12-11 | 2019-04-05 | 南开大学 | Halophytes summer cypress is repairing the application of cadmium-polybrominated diphenyl ethers combined contamination soil |
| CN113433229A (en) * | 2021-05-08 | 2021-09-24 | 浙江工业大学 | Method for removing new pollutant acesulfame potassium in water source by using allium mongolicum regel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041515A (en) * | 2007-03-14 | 2007-09-26 | 北京锦绣大地农业股份有限公司 | Artificial marshland composite vegetation water treatment system |
-
2011
- 2011-03-15 CN CN2011100617243A patent/CN102219343A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041515A (en) * | 2007-03-14 | 2007-09-26 | 北京锦绣大地农业股份有限公司 | Artificial marshland composite vegetation water treatment system |
Non-Patent Citations (3)
| Title |
|---|
| 《农业环境科学学报》 20061231 熊珺等 水葱对五氯酚污染土壤植物修复的初步研究 第25卷, 第6期 * |
| HONGLIN HUANG等: "Behavior of Decabromodiphenyl Ether (BDE-209) in the Soil-Plant System: Uptake, Translocation, and Metabolism in Plants and Dissipation in Soil", 《ENVIRON. SCI. TECHNOL》 * |
| 熊珺等: "水葱对五氯酚污染土壤植物修复的初步研究", 《农业环境科学学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108658240A (en) * | 2018-06-28 | 2018-10-16 | 兰州城市学院 | The application of submerged plant phenol in absorbing water body |
| CN109570228A (en) * | 2018-12-11 | 2019-04-05 | 南开大学 | Halophytes summer cypress is repairing the application of cadmium-polybrominated diphenyl ethers combined contamination soil |
| CN109513742A (en) * | 2018-12-21 | 2019-03-26 | 北京大学深圳研究生院 | A kind of biological renovation method of novel lasting organic pollutant |
| CN113433229A (en) * | 2021-05-08 | 2021-09-24 | 浙江工业大学 | Method for removing new pollutant acesulfame potassium in water source by using allium mongolicum regel |
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Application publication date: 20111019 |