Earthworm strengthening repair method of soil polluted by phenanthrene, pyrene or pentachlorophenol

A technology for pentachlorophenol and polluted soil, applied in the field of soil pollution control, can solve problems such as poor effect and uncontrollable usage amount, and achieve the effects of promoting absorption and utilization, enhancing agricultural reuse value, and improving the quality of cultivated soil

Inactive Publication Date: 2010-02-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the amount of use cannot be grasped, literature reports show that the use of earthworms is not effective for large-scale treatment of pollutants

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Earthworm-enhanced remediation effect of polycyclic aromatic hydrocarbon phenanthrene-contaminated soil

[0026] 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 treatment groups include: soil control group and earthworm group, the amount of earthworm added is 60 per 5 mg phenanthrene / kg soil, which are recorded as CK and EW respectively. The treatment time...

Embodiment 2

[0029] Effect of earthworm-enhanced remediation on polycyclic aromatic hydrocarbon pyrene-contaminated soil

[0030] The basic steps are the same as in Example 1. The treatment groups include: soil control group and earthworm group. The amount of earthworms added is 90 per 50 mg pyrene / kg soil, which are recorded as CK and EW respectively. figure 2 The change of pyrene concentration in the soil under earthworm treatment with time is given. It can be seen from the figure that the stocking of earthworms can significantly promote the reduction of pyrene concentration in the soil. Compared with the CK control group, the concentration of pyrene in the soil of the EW treatment group decreased significantly. After 45 days of earthworm stocking, the treatment effect of pyrene in the surface soil can also reach more than 42%. This indicated that the stocking of earthworms could significantly promote the decrease of pyrene concentration in the soil.

Embodiment 3

[0032] Effect of earthworm-enhanced remediation on pentachlorophenol-contaminated soil

[0033] Its basic steps are the same as in Example 1, and the treatment groups include: soil control group, earthworm group, earthworm and orange stalk combination group, and the addition amount of earthworms is 70 pieces per 1mg pentachlorophenol / kg soil, which are respectively recorded as CK, EW and EW+ Stalk. And for the combination group of earthworm and orange stalk, the orange stalk is rice straw, and the addition is about 10kg / square meter.

[0034] image 3 The change of PCP concentration in the soil from the time of treatment after earthworm stocking is given. It can be seen from the figure that from the beginning of the treatment, stocking of earthworms can promote the decrease of PCP concentration in the soil. Compared with the CK control group, the PCP concentration in the soil of the EW treatment group decreased significantly after 30 days. After 45 days, the treatment effec...

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Abstract

The invention relates to an earthworm strengthening 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 at regular intervals; (B) adding earthworm or the earthworm and straw or the earthworm and a golden weeping willow. The earthworm is M.guillelmi geophagy earthworm, and is singly thrown mutually or thrown together with the golden weeping willow or thrown together with the straws. In the step B, 4-6 golden weeping willows are planted when the content of the phenanthrene, the pyrene and the pentachlorophenol is 5, 50 and 1mg/kg per square meter oil. The earthworm adopted by the invention can greatly improve the quality of cultivated soil and increase the agricultural reuse value of the soil while rapidly removing soil pollutants; the invention is harmonious with the natural ecologyprocess, and combines the earthworm repair with woody plants repair further so that organics are absorbed and utilized by the woody plant while the organics are metabolized.

Description

technical field [0001] The invention relates to the field of soil pollution control in environmental protection, in particular to an earthworm-enhanced restoration method for organic matter 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00A01B79/00A01G1/00
Inventor 季荣郭红岩李佳华孙媛媛王晓蓉尹颖
Owner NANJING UNIV
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