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

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

Active Publication Date: 2010-02-17
NANJING UNIV
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  • 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...

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

Experimental program
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Effect test

Embodiment 1

[0029] In situ phytoremediation of polycyclic aromatic hydrocarbon phenanthrene-contaminated soil

[0030] The repair test site is located in a town in Jiangning District, Nanjing City. During the test, 200m was dug out first 2 For the soil in the rectangular plot, build a test pond and a collection system for infiltration water, then backfill the soil, backfill in layers when backfilling the topsoil, and sprinkle the solution of polycyclic aromatic hydrocarbon phenanthrene evenly in layers. After mixing evenly, level the land and break down the large pieces of soil on the surface. Then use PVC partitions to separate into several 1×1m 2 The square plot, the clapboard is buried at a depth of 25cm. Every 3 adjacent cells is a group of parallel. The planting plant was Weeping Willow J1011. When the planting density was 5 mg phenanthrene / kg soil, 5 plants were planted per square meter (100 plants / 100 mg phenanthrene / kg soil). The planting time was 3 days after the pollution tr...

Embodiment 2

[0033] In situ phytoremediation of polycyclic aromatic hydrocarbon pyrene-contaminated soil

[0034] Its basic steps are the same as embodiment 1, except that when the planting density of weeping willow is 50mg pyrene / kg soil, every square meter is planted 5 strains (500 strains / every 100mg pyrene / kg soil), and the treatment group has: soil control group, weeping willow group and horseradish group, denoted as CK, W and HR, respectively. Figure 4 The time-dependent changes of pyrene concentration in soil under Weeping willow planting treatments are 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 vegetatively propagated deep-rooted nodule plant, and its planting method is to bury the fleshy roots separately, and the planting den...

Embodiment 3

[0036] In situ phytoremediation of pentachlorophenol-contaminated soil

[0037] Its basic steps are the same as Example 1, except that the planting density of weeping willow is when 1mg PCP / kg soil is planted 5 strains (10 strains / every 100mg PCP / kg soil) treatment groups in every square meter: soil control group, Weeping willow group and horseradish group were recorded as CK, W and HR, respectively. For the horseradish group, depending on the amount of horseradish added, 50, 100 or 200g / m 2 The difference is recorded as HR50, HR100 and HR200 respectively.

[0038] Image 6 The changes of PCP concentration in soil from the time of treatment under the weeping willow planting are given. It can be seen from the figure that from the beginning of the treatment, the planting of weeping willow promoted the decrease of the PCP concentration in the soil, and the decrease of the PCP concentration in the soil under the W treatment was significantly different from that of the CK contro...

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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 contaminated by phenanthrene, pyrene or pentachlorophenol. Background technique [0002] Soil is an important natural resource for human survival and development and the foundation on which the entire terrestrial ecosystem depends. It is very important for sustainable agricultural development 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 serious 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 residues in soil have been g...

Claims

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Application Information

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