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Method and device for utilizing persulfate oxidation and ryegrass to restore polluted wetland soil

A technology of persulfate oxidation and persulfate is applied in the restoration of polluted soil, climate change adaptation and other directions, which can solve the problems of high cost, biological pollution of soil and groundwater, secondary pollution, etc., and improve wetland soil degradation. , The effect of low professional technical requirements and low investment

Inactive Publication Date: 2015-09-02
SHANGHAI UNIV
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Problems solved by technology

[0003] Existing remediation methods for pyrene-contaminated wetland soil include physical remediation, chemical remediation, and biological remediation. Traditional physical and chemical remediation methods are costly and likely to cause secondary pollution. Microbial remediation methods may cause biological pollution to soil and groundwater.

Method used

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  • Method and device for utilizing persulfate oxidation and ryegrass to restore polluted wetland soil
  • Method and device for utilizing persulfate oxidation and ryegrass to restore polluted wetland soil
  • Method and device for utilizing persulfate oxidation and ryegrass to restore polluted wetland soil

Examples

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Embodiment Construction

[0020] Example 1: Preliminary preparation of wetland soil contaminated by pyrene through optimized persulfate oxidation

[0021] The oxidation of soil pyrene by persulfate takes place in a temperature-controlled device. See figure 1 The device in is a simulation device for studying the use of persulfate to oxidize soil pyrene pollution, including an oxidation tank (I) and a temperature control device (II). The oxygen-contaminated soil is placed in the barrel 1 of the chemical barrel (I). The bucket-shaped bottom of the barrel body 1 is connected to the filtrate collection chamber 4, and a sieve plate 8 is separated between the bucket-shaped bottom and the filtrate collection chamber; the lower end of the filtrate collection chamber 4 is connected with the valve 5, and the bucket-shaped bottom is filled with gravel. The temperature control device (Ⅱ) is composed of a heating belt 2 and a temperature control part. The heating belt surrounds the periphery of the barrel 1. The tempe...

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Abstract

The invention relates to a method and device for utilizing persulfate oxidation and ryegrass to restore polluted wetland soil. The ryegrass is used as a main material, and the persulfate oxidation is adopted to restore the polluted wetland soil. The method and device adopt a highest activation efficiency mode to heat and activate persulfate oxidation so as to remove pyrene in the wetland soil. After the ryegrass is subjected to accelerating germination in a laboratory, spaced sowing with the planting density of 100-120 plants per square meter is conducted on the ryegrass in the polluted wetland soil restored through persulfate oxidation, indoor potted planting is adopted for cultivation, and sampling analysis is performed after 60 days. Compared with a traditional polluted wetland soil physical-chemical method, the method has the advantages of being high in restoration efficiency, low in cost, good in operability, small in environment risk and the like, has good environmental benefit, social benefit and economic benefit and is a new method provided for a pyrene-polluted wetland soil environment.

Description

Technical field [0001] The invention relates to a method for repairing wetland soil contaminated by polycyclic aromatic hydrocarbon pyrene, in particular to a method and device for repairing pyrene-contaminated wetland soil by using persulfate oxidation combined with ryegrass. Background technique [0002] The oil, gas and chemical industries that have developed rapidly in recent years have not only created a rapidly developing national economy, but also brought great harm to the environment. Polycyclic aromatic hydrocarbon pollution is one of the main pollution caused by these industries. After polycyclic aromatic hydrocarbons enter the atmosphere, they can enter soil and water bodies through chemical reactions, dust, rainfall, and snowfall. Wetland is the kidney of the earth. Wetland soil is a necessary place for human society to survive and engage in certain production activities, and it is an indispensable natural resource for maintaining a good ecological environment. To a ...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08
CPCY02A40/22
Inventor 刘晓艳李红兵朱水平陈枭殷甜甜陶恺赟侯芸芸
Owner SHANGHAI UNIV
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