Restoration method of soil polluted by high-concentration petroleum by utilizing H2O2 in combination with cotton

A technology of H2O2, oil pollution, applied in the direction of the restoration of polluted soil, etc., to achieve the effect of low cost and short time

Inactive Publication Date: 2010-06-09
NANKAI UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on remediation plants at home and abroad mainly focuses on oats, ryegrass, alfalfa, hemp, beans, etc., but there are few reports on the use of cotton to remediate organically polluted soil.

Method used

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  • Restoration method of soil polluted by high-concentration petroleum by utilizing H2O2 in combination with cotton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Example 1H 2 o 2 Remediation combined with phytoremediation to treat oil-contaminated soil

[0014] The experiment used a flowerpot with a diameter of 12cm and a height of 14cm, which contained 700g of soil with a concentration of 50000mg / kg oil pollution, including 2 groups of phytoremediation, 2 groups of chemical combined phytoremediation, 1 group of chemical remediation soil control planting and 1 group of blank control, Three repetitions were performed for each treatment level. The pre-chemical repair was 14 days, a total of 127d. The experimental conditions are shown in Table 1, and the plants and corresponding soil samples were collected after the experiment.

[0015] Table 1 Experimental conditions

[0016]

[0017] When the petroleum hydrocarbon content in the contaminated soil was 5%, the degradation rates of TPHs in the phytoremediation soil of ryegrass and cotton were 45.2% and 48.9% respectively after 127 days; 2 o 2 The repaired degradation rate i...

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Abstract

The invention relates to a restoration method of the soil polluted by high-concentration petroleum, in particular to a method for restoring soil polluted by high-concentration petroleum by utilizing chemical oxidant pretreatment and subsequent plant, and the content of the total petroleum hydrocarbon in the soil after restoration by the method is greatly lowered. In the restoration of the soil polluted by petroleum hydrocarbon by adopting H2O2 oxidation in combination with plants, the once addition amount of H2O2 is 8ml / 10g soil, the soil which is pretreated by H2O2 oxidation is restored by cotton; and the degradation efficiency of the total petroleum hydrocarbon in the soil polluted by petroleum restored by H2O2 in combination with cotton is dramatically higher than that by single chemical or plant restoration, and the addition of H2O2 does not inhibit the growth of cotton. The method can effectively restore the soil polluted by high-concentration petroleum, the 127d total petroleum degradation rate reaches 93.9%, while single plant or chemical degradation can not reach the degradation efficiency. The method for processing soil polluted by high-concentration petroleum has lower cost, great actual application value, short restoration time, has the advantages of chemical restoration and plant restoration simultaneously, and can lower the concentration of the petroleum hydrocarbon in the polluted soil in a short time.

Description

technical field [0001] The invention relates to a method for remediating petroleum-contaminated soil, in particular to a method for remediating high-concentration petroleum-contaminated soil by using chemical oxidant pretreatment and subsequent phytoremediation. The total petroleum hydrocarbon content in the soil is significantly reduced after the method is used for remediation. Background technique [0002] Oil has caused extensive soil pollution during extraction, transportation and processing. Petroleum hydrocarbons are chemical substances produced by the use of petroleum in different human activities. They are a class of priority toxic organic pollutants that commonly exist in the environment. They are highly persistent and harmful in the environment. Some of these PAHs not only have strong carcinogenic, teratogenic and mutagenic toxicity, but also can be gradually enriched and amplified in animals and plants through the food chain, thereby posing a serious threat to hum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 肖羽堂许双双李志花朱莹佳尹玉玲
Owner NANKAI UNIV
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