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Preparation and application of chemical oxidation repair additive for organic matter-contaminated soil

A technology for preparing additives and polluting soil, applied in the field of soil remediation, can solve problems such as few active groups and complex structure, and achieve the effects of low cost, simple process and good application prospects

Inactive Publication Date: 2017-02-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active groups in humic acid are few and the structure is complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of soil chemical oxidation remediation additive

[0021] At room temperature, first dissolve 0.83 g of hydroquinone and 0.57 g of glycine (the molar ratio of hydroquinone and glycine is 1.5:1) into 300 mL of sodium hydroxide solution with a concentration of 0.1 mol / L, and stir well , to make it fully mixed; at 60 ℃, add 0.015 mol potassium persulfate to the mixture, stir for 1 h, cool down, then add hydrochloric acid with a concentration of 2 mol / L to precipitate, centrifuge, and use a concentration of 0.1 mol / L hydrochloric acid washed several times, freeze-dried.

[0022] (2) Performance evaluation of soil chemical oxidation remediation additives

[0023] Take 5.0 g of o-chloronitrobenzene-contaminated soil, wherein the concentration of o-chloronitrobenzene is 0.4 mg / g, add 0.75 g of the soil chemical oxidation remediation additive prepared above, and then add potassium persulfate with a concentration of 100 mmol / L in turn 3 mL of solution and 3 mL ...

Embodiment 2

[0026] (1) Preparation of soil chemical oxidation remediation additive

[0027] At room temperature, first dissolve 0.83 g of catechol and 2.22 g of glutamic acid (the molar ratio of catechol and glutamic acid is 0.5:1) into 300 mL of potassium hydroxide solution with a concentration of 0.1 mol / L In the mixture, stir evenly to make it fully mixed; at 60 °C, add 0.015 mol sodium persulfate to the mixed solution, stir for 1 h, cool down, then add hydrochloric acid with a concentration of 2 mol / L to precipitate, centrifuge, and use Washed several times with 0.1 mol / L hydrochloric acid and freeze-dried.

[0028] (2) Performance evaluation of soil chemical oxidation remediation additives

[0029] With embodiment 1.

[0030] After 4 hours of treatment, the degradation rate of o-chloronitrobenzene in the soil was 87.5%; when no soil chemical oxidation remediation additive was added, the degradation rate of o-chloronitrobenzene in the soil was only 60%.

Embodiment 3

[0032] (1) Preparation of soil chemical oxidation remediation additive

[0033] At room temperature, first dissolve 0.83 g of resorcinol and 0.33 g of aspartic acid (the molar ratio of resorcinol and aspartic acid is 3.0:1) into 300 mL of 0.1 mol / L sodium hydroxide solution In the mixture, stir evenly to make it fully mixed; at 60 °C, add 0.015 mol ammonium persulfate to the mixed solution, stir for 1 h, cool down, then add hydrochloric acid with a concentration of 2 mol / L to precipitate, centrifuge, and use Washed several times with 0.1 mol / L hydrochloric acid and freeze-dried.

[0034] (2) Performance evaluation of soil chemical oxidation remediation additives

[0035] With embodiment 1.

[0036] After 4 hours of treatment, the degradation rate of o-chloronitrobenzene in the soil was 70.6%; when no soil chemical oxidation remediation additive was added, the degradation rate of o-chloronitrobenzene in the soil was only 60%.

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Abstract

The invention discloses a preparation method and application of a chemical oxidation repair additive for organic matter-contaminated soil. The chemical oxidation repair additive for the organic matter-contaminated soil is prepared by adopting persulfate to oxidize a bisphenol compound and alpha-amino acid in an alkaline aqueous solution. The chemical oxidation repair additive is directly added into the organic matter-contaminated soil, and organic pollutants in the soil are subjected to oxidative degradation by taking a potassium persulfate solution and a hydrogen peroxide solution as oxidizing agents, and using ferric oxide, which is inherent in the soil, as a catalyst. The preparation method is simple in technology, mild in conditions, low in cost and environmentally-friendly, and can realize large-scale production; when the chemical oxidation repair additive is used for repairing the organic matter-contaminated soil, the organic pollutants are efficiently and rapidly degraded, and secondary pollution is not produced; therefore, the chemical oxidation repair additive for the organic matter-contaminated soil has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for preparing an additive for chemical oxidation remediation of organic polluted soil and its application. Background technique [0002] Soil is located in the center of the natural environment. It is the material basis for human survival and the central link connecting the inorganic and organic, biological and non-biological realms in the natural environment. With the development of production, more and more organic pollutants such as petroleum, benzene series, pesticides, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) produced in the chemical industry and petroleum industry have passed through various way into the soil. Once soil is polluted, it will not only directly affect crops, but also threaten groundwater quality and affect human health. Therefore, soil remediation has become a research hotspot at home and abro...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08
CPCC09K17/40B09C1/08
Inventor 刘中华国伟林乔壮明卫静周海红张科韩雪梅
Owner UNIV OF JINAN