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Repair method for multi-ring arene contaminated soil based on vinegar residues and waste ferrous sulfate in titanium dioxide plant

A polycyclic aromatic hydrocarbon and titanium dioxide plant technology, applied in the field of remediation of polycyclic aromatic hydrocarbon-contaminated soil, to achieve resource utilization and reduce toxicity

Inactive Publication Date: 2019-09-06
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the current remediation technology of polycyclic aromatic hydrocarbons polluted soil, the present invention provides a method based on vinegar lees, a waste from the vinegar industry, and FeSO, a waste from the titanium dioxide industry. 4 .7H 2 Remediation method of polycyclic aromatic hydrocarbons polluted soil by O

Method used

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  • Repair method for multi-ring arene contaminated soil based on vinegar residues and waste ferrous sulfate in titanium dioxide plant
  • Repair method for multi-ring arene contaminated soil based on vinegar residues and waste ferrous sulfate in titanium dioxide plant
  • Repair method for multi-ring arene contaminated soil based on vinegar residues and waste ferrous sulfate in titanium dioxide plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: Under visible light, soil remediation material I is used for the remediation of low concentration phenanthrene polluted soil

[0041] 1. Pretreatment of PAH-contaminated soil with the contaminated soil sampled from the polluted plot: First, air-dry an appropriate amount of PAH-contaminated soil for about a week. Subsequently, the soil was crushed and crushed. Finally, the 60-mesh soil sieve is used to sieve the soil to obtain the required soil particles;

[0042] 2. The pretreated soil particles were detected, and the main pollutant in the detected soil was phenanthrene, and its content was 180mg phenanthrene / kg soil;

[0043] 3. Dilute vinegar lees and titanium dioxide factory waste FeSO 4 .7H 2 O is put into pulverizer according to mass ratio 4:1 and mixes evenly, promptly obtains soil restoration material I;

[0044] 4. Stir the soil remediation material I and the polycyclic aromatic hydrocarbon contaminated soil evenly, wherein the mass percentage ...

Embodiment 2

[0052] Embodiment 2: Under visible light, remediation of high-concentration phenanthrene-contaminated soil

[0053] 1. Pretreatment of PAH-contaminated soil with the contaminated soil sampled from the polluted plot: First, air-dry an appropriate amount of PAH-contaminated soil for about a week. Subsequently, the soil was crushed and crushed. Finally, the 60-mesh soil sieve is used to sieve the soil to obtain the required soil particles;

[0054] 2. Detect the pretreated soil particles, the main pollutant in the soil is phenanthrene, and its content is as high as 2150mg phenanthrene / kg soil;

[0055] 3. Dilute vinegar lees and titanium dioxide factory waste FeSO 4 .7H 2 O was put into a pulverizer according to the mass ratio of 2:1, pulverized and mixed evenly, and then the pulverized mixture was placed in a muffle furnace at a temperature of 300°C, and the soil restoration material II was obtained after roasting for 3 hours.

[0056] 4. Stir the soil remediation material I...

Embodiment 3

[0062] Example 3: Remediation of high-concentration complex polycyclic aromatic hydrocarbon-contaminated soil under visible light

[0063] 1. Pretreatment of PAH-contaminated soil with the contaminated soil sampled from the polluted plot: First, air-dry an appropriate amount of PAH-contaminated soil for about a week. Subsequently, the soil was crushed and crushed. Finally, the 60-mesh soil sieve is used to sieve the soil to obtain the required soil particles;

[0064] 2. The soil particles after pretreatment are detected. The main pollutants in the soil are naphthalene, anthracene, phenanthrene and pyrene, and the concentrations are respectively 350mg naphthalene / kg soil, 1350mg anthracene / kg soil, 531mg phenanthrene / kg soil and 768mg pyrene / kg soil;

[0065] 3. Dilute vinegar lees and titanium dioxide factory waste FeSO 4 .7H 2 O was pulverized and mixed evenly in a pulverizer according to the mass ratio of 1:1, and then the pulverized mixture was placed in a muffle furna...

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Abstract

The invention belongs to the technical field of environment, and provides a repair method for multi-ring arene contaminated soil based on vinegar residues and waste ferrous sulfate FeSO4 7H2O in a titanium dioxide plant. Vinegar residues and waste ferrous sulfate FeSO4 7H2O in the titanium dioxide plant are adopted as raw materials for preparing a soil repair material I and a material II. The material I is a mixture formed by smashing and mixing vinegar residues and waste ferrous sulfate FeSO4 7H2O. The material II is a product obtained by calcinating the soil repair material I under low temperature. When the total content of multi-ring arene is lower than 1,000 mg multi-ring arene / kg soil, the material I is selected; when the total content of multi-ring arene is high than 1,000 mg multi-ring arene / kg soil, the material II is selected. The selected soil repair material and the multi-ring arene contaminated soil are stirred and spread, the pH value of the soil does not need to be regulated, hydrogen peroxide is not needed, and under irradiation of visible light, the multi-ring arene in soil can be degraded and oxidized deep. The toxicity of contaminations in soil can be greatly lowered, and the growth coefficients of plants planted in the uncontaminated soil and repaired soil have no obvious difference.

Description

technical field [0001] The invention belongs to the technical field of environment, and relates to resource utilization of wastes and a restoration method for soil polluted by polycyclic aromatic hydrocarbons. Background technique [0002] my country is a big country in the production and consumption of vinegar. According to statistics, 0.8 tons of vinegar grains will be produced for every ton of vinegar produced. In 2015, the amount of vinegar grains produced was as high as 3.2 million tons. The water content of vinegar grains is as high as 65%-75%, which is acidic, and the pH of the filtrate is acidic (3-3.5). If a large amount of acid vinegar residues are not effectively treated every year, it will cause environmental pollution, soil acidification and other problems. At present, the resource utilization methods of vinegar grains mainly include feed, fertilizer, matrix and energy, and each method has obvious shortcomings and is difficult to promote. There is an urgent ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 罗志军王鸣俊宋由页郑先荣王静曲玲玲
Owner JIANGSU UNIV
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