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Polycyclic aromatic hydrocarbon contaminated soil remediation material and preparation method thereof

A technology for polluted soil and remediation materials is applied in the field of polycyclic aromatic hydrocarbon-contaminated soil remediation materials and their preparation, which can solve the problems of high remediation cost and huge amount of waste water, and achieve the effects of simple preparation method, shielding interference and mild working conditions.

Pending Publication Date: 2018-11-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the chemical repair method is the high repair cost
In addition, the solubilizer-enhanced leaching method often requires a large amount of water. Therefore, the use of this method needs to consider the water supply capacity. At the same time, because the wastewater is huge and contains a large amount of pollutants, wastewater treatment is required, so the repair cost is relatively high.

Method used

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  • Polycyclic aromatic hydrocarbon contaminated soil remediation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A polycyclic aromatic hydrocarbon contaminated soil remediation material, consisting of the following components in parts by weight:

[0032] 75 parts of diatomite, 75 parts of peat soil, 1 part of humic acid, 65 parts of corn cob, 35 parts of nutrients, 0.0025 parts of surfactant, 0.025 parts of oxidant, 0.0025 parts of compound microbial agent;

[0033] Nutrients are composed of rice bran, (NH 4 ) 2 HPO 4 , urea, superphosphate and plant ash;

[0034]Rice bran, (NH 4 ) 2 HPO 4 The mass percentages of urea, superphosphate and plant ash in the nutrients are: rice bran 15%, (NH 4 ) 2 HPO 4 2%, urea 1%, superphosphate 3%, plant ash balance;

[0035] Described surfactant is the mixture of anionic surfactant and nonionic surfactant, and the weight ratio of described anionic surfactant and nonionic surfactant is 1:2; Anionic surfactant is sodium lauryl sulfate (SDS); the nonionic surfactant is Triton X-100.

[0036] The oxidizing agent is sodium persulfate activat...

Embodiment 2

[0045] A polycyclic aromatic hydrocarbon contaminated soil remediation material, consisting of the following components in parts by weight:

[0046] 50 parts of diatomite, 50 parts of peat soil, 0.5 parts of humic acid, 40 parts of corn cob, 10 parts of nutrients, 0.001 part of surfactant, 0.02 part of oxidant, 0.001 part of compound microbial agent;

[0047] Nutrients are composed of rice bran, (NH 4 ) 2 HPO 4 , urea, superphosphate and plant ash;

[0048] The rice bran, (NH 4 ) 2 HPO 4 The mass percentages of urea, superphosphate and plant ash in the nutrients are: rice bran 10%, (NH 4 ) 2 HPO 4 1.5%, urea 0.5%, superphosphate 2%, plant ash balance;

[0049] Surfactant is the mixture of anionic surfactant and nonionic surfactant, and the weight ratio of described anionic surfactant and nonionic surfactant is 1:2; Anionic surfactant is sodium dibutyl naphthalene sulfonate; The nonionic surfactant is Triton X-305.

[0050] The oxidizing agent is potassium hydrogen p...

Embodiment 3

[0059] A polycyclic aromatic hydrocarbon contaminated soil remediation material, consisting of the following components in parts by weight:

[0060] 100 parts of diatomite, 100 parts of peat soil, 2 parts of humic acid, 80 parts of corn cob, 50 parts of nutrients, 0.005 parts of surfactant, 0.05 parts of oxidant, and 0.005 parts of compound microbial agent;

[0061] Nutrients are composed of rice bran, (NH 4 ) 2 HPO 4 , urea, superphosphate and plant ash;

[0062] The rice bran, (NH 4 ) 2 HPO 4 The mass percentages of urea, superphosphate and plant ash in the nutrients are: rice bran 20%, (NH 4 ) 2 HPO 4 2.5%, urea 1.5%, superphosphate 4%, plant ash balance;

[0063] Surfactant is the mixture of anionic surfactant and nonionic surfactant, and the weight ratio of described anionic surfactant and nonionic surfactant is 1:2; Anionic surfactant is sodium lauryl sulfate; Nonionic surfactant The ionic surfactant was Brij 35.

[0064] Oxidizing agent is a kind of in Fenton...

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Abstract

The present invention belongs to the technical field of soil remediation and discloses a polycyclic aromatic hydrocarbon contaminated soil remediation material. The polycyclic aromatic hydrocarbon contaminated soil remediation material comprises the following components in parts by weight: diatomaceous earth, peat soil, humic acid, corn cob, nutrients, a surfactant, an oxidant and a compound microbial agent; the nutrients comprise rice bran, (NH4)2HPO4, urea, calcium superphosphate and plant ash; the surfactant is an anionic and non-ionic mixed surfactant; the oxidant is one of hydrogen peroxide activated sodium persulfate, potassium hydrogen persulfate or a Fenton reagent; the compound microbial agent comprises pseudomonadaceae powder, bacillus powder and fusarium powder; and the weight ratio of the pseudomonadaceae powder, bacillus powder and fusarium powder is 3:(1-5):(2-5). Compared with the prior art, beneficial effects are as follows: the polycyclic aromatic hydrocarbon contaminated soil remediation material is capable of degrading polycyclic aromatic hydrocarbons in the soil and also has an improved effect on the soil conditions of the soil.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a polycyclic aromatic hydrocarbon contaminated soil remediation material and a preparation method thereof. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are a class of hydrophobic and persistent organic pollutants composed of two or more benzene rings. Due to the "three causes" of PAHs toxicity, low water solubility and long-term exposure to the environment, PAHs have been listed as priority pollutants by the United States and Europe. The main sources of PAHs include natural sources such as spontaneous combustion fires in forests and grasslands, volcanic eruptions, and man-made pollution sources such as incomplete combustion and pyrolysis of fossil fuels, and leakage and sewage discharge of crude oil during mining and transportation. With the rapid development of my country's coking, coal power and petrochemical industries, and the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C09K17/40C09K101/00C05G3/80
CPCC05B1/02C05G3/00C05G3/80C09K17/40C09K2101/00C05B7/00C05C9/00C05D1/00C05D9/00C05F5/002C05F11/02C05F11/08
Inventor 孙然吴耀国胡思海樊琳钱进乔子霞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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