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A chemical remediation agent suitable for oil-contaminated soil and its application method

A technology for chemical remediation and oil pollution, applied in the restoration of polluted soil, chemical instruments and methods, soil conditioning materials, etc., can solve problems such as petroleum hydrocarbon pollution of soil, and achieve high oxidant utilization, cost reduction, and applicable scope. wide effect

Active Publication Date: 2021-03-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is: aiming at the problem of petroleum hydrocarbon contaminated soil, to provide a new type of practical and efficient petroleum hydrocarbon contaminated soil remediation agent

Method used

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  • A chemical remediation agent suitable for oil-contaminated soil and its application method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, take 50 g of soil with a diesel pollutant concentration of 6705 mg / kg and put it in an Erlenmeyer flask, mix the contaminated soil with water according to the soil-water ratio of 0.25 kg: 1 L, and add citric acid (CAs) and iron ions (Fe 3+ ) mixed solution and calcium peroxide (CaO 2 ) solid 0.75g; calcium peroxide (CaO 2 ), iron ions (Fe 3+ ), the mass ratio of citric acid (CAs) was 2.57:1:6.86, and the reaction was stirred for 24 hours. figure 1 . The degradation rate of target pollutants increased with time and reached 64% within 24 hours.

Embodiment 2

[0023] First, take 50 g of soil with a diesel pollutant concentration of 6196 mg / kg and put it in an Erlenmeyer flask, mix the contaminated soil with water according to the soil-water ratio of 0.25 kg: 1 L, and add citric acid (CAs) and iron ions (Fe 3+ ) mixed solution, calcium peroxide (CaO 2 ) solid 0.75g; calcium peroxide (CaO 2 ), iron ions (Fe 3+ ), the mass ratio of citric acid (CAs) was 1.28:1:6.86, and the reaction was stirred for 24 hours. The degradation rate of diesel pollutants in the soil changed with time. figure 1 . The degradation rate of the target pollutants generally increased with time, reaching 73% within 24 hours.

Embodiment 3

[0025] First, take 50 g of soil with a diesel pollutant concentration of 6964 mg / kg and put it in an Erlenmeyer flask, mix the contaminated soil with water according to the soil-water ratio of 0.25 kg: 1 L, and then add citric acid (CAs) and iron ions (Fe 3+ ) mixed solution, calcium peroxide (CaO 2 ) solid 1.5g; calcium peroxide (CaO 2 ), iron ions (Fe 3+ ), the mass ratio of citric acid (CAs) was 5.14:1:6.86, and the stirring reaction was carried out for 24 hours. figure 1 . The degradation rate of the target pollutants generally increased with time, reaching 79% within 24 hours.

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Abstract

The invention discloses a chemical repair agent suitable for petroleum pollution soil and a use method thereof. The chemical repair agent comprises an oxidizing agent, an iron-based compound and a citric acid surface active agent; the oxidizing agent is calcium peroxide; the use method comprises the steps that the petroleum pollution soil and water are mixed, the chemical repair agent is added into a mixture for carrying out a reaction for 4 to 24 h, and the petroleum pollution in the soil can be subjected to oxydative degradation. The operation method is simple, the reaction condition is gentle, the time is short, the application range is wide, and compared with the traditional oxidation technology, the chemical repair agent has the advantages that the oxidation effect is stable and continuous, the agent and running maintaining cost are flow, and the industrial application prospect is large.

Description

technical field [0001] The invention relates to a method for remediating petroleum hydrocarbon-contaminated soil based on calcium peroxide oxidation, and belongs to the technical field of remediation of petroleum hydrocarbon-contaminated soil. Background technique [0002] The characteristics of petroleum hydrocarbon pollution due to its certain environmental toxicity and high concentration in the environment have aroused widespread concern worldwide. Unavoidable accidents that occur during oil extraction, refining, transportation, and storage are the main and persistent sources of petroleum hydrocarbon contamination in soil and groundwater. In particular, in recent years, due to various reasons such as oil spills, drilling platform explosions, and oil tanker accidents at home and abroad, soil, groundwater, and marine water resources have been polluted to a certain extent. With the promulgation of the new environmental protection law and the continuous advancement of the "T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08C09K17/40
Inventor 张艾李振宇刘亚男李响战佳勋赵静怡高小婷王慈浩郝思宇沈玉叶
Owner DONGHUA UNIV