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Plant repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol

A technology of pentachlorophenol and polluted soil, applied in the field of soil pollution control

Active Publication Date: 2011-07-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For the problems existing in the restoration of phenanthrene, pyrene or pentachlorophenol-contaminated soil, the present invention provides a phytoremediation method for soil contaminated by phenanthrene, pyrene or pentachlorophenol, by inserting weeping willow or planting deep-rooted horseradish for application It is used in the remediation of soil contaminated by organic matter phenanthrene and pyrene or pentachlorophenol to achieve low-cost, efficient and safer soil remediation

Method used

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  • Plant repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol
  • Plant repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol
  • Plant repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol

Examples

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Effect test

Embodiment 1

[0030] In situ Phytoremediation Effect of Polycyclic Aromatic Hydrocarbon Phenanthrene Contaminated Soil

[0031] The restoration test site is located in a town in Jiangning District, Nanjing. During the test, first dig out 200m 2 For the soil in the rectangular plot, build the test pond and prepare the infiltration water collection system, then backfill the soil, and backfill in layers when backfilling the surface soil, and sprinkle the solution of polycyclic aromatic hydrocarbon phenanthrene evenly in layers, fully After mixing evenly, level the land and grind the large soil particles on the surface into fine pieces. Then use PVC partitions to divide into several 1×1m 2 The square community, the partition depth is 25cm. Every 3 adjacent cells is a group of parallel. The planting plant is weeping willow J1011. When the planting density is 5 mg phenanthrene / kg soil, 5 plants are planted per square meter (100 plants / per 100 mg phenanthrene / kg soil), and the planting time is...

Embodiment 2

[0034] In situ Phytoremediation Effect of PAH-Pyrene Contaminated Soil

[0035] Its basic steps are the same as in Example 1, except that the weeping willow planting density is 5 plants per square meter when the planting density is 50mg pyrene / kg soil (500 strains / every 100mg pyrene / kg soil), and the treatment group has: soil control group, weeping willow willow group, horseradish group, respectively recorded as CK, W and HR. Figure 4 The concentration of pyrene in the soil under the treatment of weeping willow planted with time was given. It can be seen from the figure that after the treatment started, the decrease of the pyrene concentration in the soil under the W treatment was significantly different from that of the CK control group (p Figure 5 It can be seen that the deep-rooted plant horseradish is a perennial cruciferous plant with deep-rooted root nodules, and its planting method is buried separately with fleshy roots, and the planting density is 200g / m 2 , horserad...

Embodiment 3

[0037] In situ Phytoremediation Effect of Pentachlorophenol Contaminated Soil

[0038] Its basic steps are with embodiment 1, and just weeping willow planting density is that 5 strains are planted per square meter when 1mg pentachlorophenol / kg soil (10 strains / every 100mg pentachlorophenol / kg soil) treatment group has: soil control group, Weeping willow group and horseradish group are recorded as CK, W and HR respectively. For the horseradish group, because the amount of horseradish added is 50, 100 or 200g / m 2 The differences are recorded as HR50, HR100 and HR200 respectively.

[0039] Figure 6 The change of PCP concentration in the soil from the time of treatment under the planting of Weeping Willow is given. It can be seen from the figure that from the beginning of treatment, the planting of willow willow has a promoting effect on the decrease of PCP concentration in the soil, and the decrease of pentachlorophenol concentration in the soil under W treatment is significa...

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Abstract

The invention relates to a plant repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol, belonging to the treatment field of soil environment pollution and comprising the following steps: (A) measuring the content of the phenanthrene, pyrene or pentachlorophenol in soil; and (B) implanting a golden weeping willow or planting deep-rootedness plant horse radish or implanting golden weeping willow and planting deep-rootedness plant horse radish at the same time. The willow in the step B is a golden weeping willow J1011(Salix*jiangsuensis CL.1011), and 4-6 golden weeping willows or deep-rootedness plant horse radishes are planted when the content of the phenanthrene, the pyrene and the pentachlorophenol 5, 50 or 1mg / kg per square meter of soil. The invention can stably remove organics in the soil well, conforms with the principle of taking actions that suit local circumstances and effectively applies natural force; the golden weeping willow and the deep-rootedness plant horse radish are used in combination, enabling pollutants to be concentrated intensively, therefore, the treatment effect is better than the sum of the effects of respective single treatment.

Description

technical field [0001] The invention relates to the field of soil pollution control in environmental protection, in particular to a phytoremediation method for soil polluted by phenanthrene, pyrene or pentachlorophenol. Background technique [0002] Soil is an important natural resource for human survival and development and the basis for the existence of the entire terrestrial ecosystem. It is very important for the sustainable development of agriculture and human survival. According to the UNEP (United Nations Environment Programme) 1990 report (IRRTC), about 300-400 million tons of organic matter enter the environment every year, most of which enter the soil environment. The problem of soil pollution in my country is also very serious, which poses a severe challenge to the sustainable utilization of cultivated land resources and the safety of food production. For example, organochlorine pesticides have been banned for nearly 20 years, and the residual amount in the soil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G1/00B09C1/00
Inventor 郭红岩李佳华孙媛媛王晓蓉季荣尹颖
Owner NANJING UNIV