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Remediation method for petroleum-contaminated soil

A remediation method and technology for polluted soil, applied in the field of remediation of petroleum-contaminated soil, can solve problems such as difficult control, ecosystem destruction, consumption, etc., to improve roughness and specific surface area, promote full contact and reaction, and high catalytic degradation. efficacy effect

Inactive Publication Date: 2017-12-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional Fenton oxidation reaction has achieved certain results in degrading organic pollutants in soil, it has the following limitations: (1) The pH value of the reaction needs to be controlled below 3, which will easily lead to the destruction of the natural ecosystem of soil and water, and affect the growth of microorganisms. Growth and reproduction; (2) Fe 2+ Difficult to control, easily oxidized to Fe 3+ , it is necessary to supplement Fe regularly 2+ , but also consume part of the H 2 o 2 ;(3)H 2 o 2 The reaction speed of oxidizing organic pollutants is too fast, and the removal efficiency is affected to a certain extent

Method used

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  • Remediation method for petroleum-contaminated soil
  • Remediation method for petroleum-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for remediating petroleum-contaminated soil, comprising the steps of:

[0037] 1) Add 30g of zeolite (iron ion carrier) and 20g of ferrous sulfate (iron-donating substance) into a 500mL catalyst preparation container, add 200mL of distilled water into the catalyst preparation container, adjust the pH value of the resulting mixture to 5, and then Heated in a water bath and evaporated to dryness, then rinsed with distilled water until neutral, and dried in an oven at 105°C for 4 hours to obtain a Fenton-like catalyst;

[0038] 2) First measure the content of petroleum in the petroleum-contaminated soil to be repaired (oil-based drilling cuttings-contaminated soil, light petroleum-contaminated soil), see Table 1, select the proportion of contaminated soil, Fenton-like catalyst and hydrogen peroxide as 1g: 0.2g:0.75mL, add a Fenton-like catalyst and hydrogen peroxide to form a mixture A in the petroleum-contaminated soil to be repaired, and adjust the pH of the rea...

Embodiment 2

[0043] A method for remediating petroleum-contaminated soil, the specific steps of which are roughly the same as those in Implementation 1, the difference being that the petroleum-contaminated soil to be repaired is moderate petroleum-contaminated soil (see Table 1), and the resulting remediated soil The removal rate of petroleum is 65.25%.

Embodiment 3

[0045] A method for remediating petroleum-contaminated soil, the specific steps of which are roughly the same as in Implementation 1, the difference being that the petroleum-contaminated soil to be repaired is heavily petroleum-contaminated soil (see Table 1), and the petroleum-contaminated soil in the obtained remediation The class removal rate is 52.31%.

[0046] Physicochemical properties of remediation petroleum contaminated soil samples in Table 1 Examples 1-3

[0047]

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Abstract

The invention discloses a remediation method for petroleum-contaminated soil. According to the remediation method for the petroleum-contaminated soil, zeolite and the like serve as iron ion carriers, a fenton-like catalyst is prepared through an impregnating and steam-drying method, and the method is applied to decomposition and degradation of organic pollutants in the petroleum-contaminated soil. According to the remediation method for the petroleum-contaminated soil, remediation reaction conditions are mild, and degradation of petroleum pollutants can be realized close to the neutral pH value without destroying the natural ecosystem of the soil or affecting growth and reproduction of microorganisms; the fenton-like catalyst can be suitable for a special solid-liquid mass transfer system in a soil system and has excellent remediation efficiency when applied to the petroleum-contaminated soil; and the preparation cost and equipment requirements involved are low, the operation process is simple, and the method has important application and popularization value.

Description

technical field [0001] The invention belongs to the field of environmental remediation, and in particular relates to a method for remediating petroleum-contaminated soil. Background technique [0002] At present, there are mainly biological, physical and chemical methods for remediating petroleum-contaminated soil. Chemical remediation represented by Fenton oxidation is one of the important methods to remove petroleum pollutants remaining in soil quickly, effectively and at low cost. Although the traditional Fenton oxidation reaction has achieved certain results in degrading organic pollutants in the soil, it has the following limitations: (1) The pH value of the reaction needs to be controlled below 3, which will easily lead to the destruction of the natural ecosystem of the soil and water body and affect the growth of microorganisms. Growth and reproduction; (2) Fe 2+ Difficult to control, easily oxidized to Fe 3+ , it is necessary to supplement Fe regularly 2+ , but a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 夏世斌蔡嘉希闫梦洋黄维巍
Owner WUHAN UNIV OF TECH
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