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A kind of preparation method of soil chemical oxidation restoration additive

A chemical oxidation and additive technology, applied in the field of soil chemical oxidation and remediation, can solve the problems of chemical additives not easily degraded, unsatisfactory effects, and many impurities, and achieves good application prospects, low cost, and good treatment effects.

Active Publication Date: 2021-02-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chemical additives are not easy to degrade and will remain in the soil for a long time
Although some natural additives (such as humic acid) are environmentally friendly, it contains more impurities and the effect is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of soil chemical oxidation remediation additive

[0020] At room temperature, accurately weigh 3.4 g of xylose, 0.5 g of glycine and 1.0 g of tyrosine, add them into 8 ml of water, and stir well to make them fully mixed; under nitrogen atmosphere, heat and reflux for 10 h; then cool to room temperature , the black solid precipitate generated by centrifugation, washed with ethanol and water respectively; then the black precipitate was immersed in 2 mol / L NaOH solution, after centrifugation and precipitation, in the supernatant, 2 mol / L hydrochloric acid was added dropwise The solution was separated out of dissolved components, washed with 0.01 mol / L hydrochloric acid and water respectively, and finally freeze-dried.

[0021] (2) Performance evaluation of soil chemical oxidation remediation additives

[0022] 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...

Embodiment 2

[0025] (1) Preparation of soil chemical oxidation remediation additive

[0026] At room temperature, accurately weigh 3.4 g of xylose and 3.4 g of glycine, add 8 ml of water, and stir well to make it fully mixed; under nitrogen atmosphere, heat and reflux for 16 h; then cool to room temperature, and centrifuge to separate the resulting black The solid precipitate was washed with ethanol and water respectively; then the obtained black precipitate was immersed in 2 mol / L KOH solution, after centrifugation and precipitation, in the supernatant, 2 mol / L hydrochloric acid solution was added dropwise to analyze the dissolved components washed with 0.01 mol / L hydrochloric acid and water, respectively, and finally freeze-dried.

[0027] (2) Performance evaluation of soil chemical oxidation remediation additives

[0028] With embodiment 1.

[0029] After 5 hours of treatment, the degradation rate of o-chloronitrobenzene in the soil was 74.34 %; when no soil chemical oxidation remedia...

Embodiment 3

[0031] (1) Preparation of soil chemical oxidation remediation additive

[0032] At room temperature, accurately weigh 3.4 g of xylose, 1.4 g of glycine, and 0.5 g of cysteine, add them into 5 ml of water, and stir well to make them fully mixed; under nitrogen atmosphere, heat and reflux for 8 h; then cool to At room temperature, centrifuge the generated black solid precipitate, wash with ethanol and water respectively; then immerse the obtained black precipitate in 2 mol / L NaOH solution, after centrifuging the precipitate, add 2 mol / L NaOH dropwise to the supernatant Hydrochloric acid solution to separate out the dissolved components, washed with 0.01 mol / L hydrochloric acid and water respectively, and finally freeze-dried.

[0033] (2) Performance evaluation of soil chemical oxidation remediation additives

[0034] With embodiment 1.

[0035] After 5 hours of treatment, the degradation rate of o-chloronitrobenzene in the soil was 77.97 %; when no soil chemical oxidation rem...

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PUM

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Abstract

The invention discloses a preparation method of soil chemical oxidation restoration additive; in nitrogen atmosphere, reducing xylose and α-amino acid undergo chemical reaction at high temperature, then immerse the obtained black precipitate in strong alkali solution, and then drop to strengthen The acid solution precipitates the dissolved components to obtain the soil chemical oxidation repair additive; the additive is directly added to the organic polluted soil, with potassium persulfate solution and hydrogen peroxide solution as the oxidant, and the inherent iron-containing compounds in the soil as the Catalyst for oxidative degradation of organic pollutants in soil; the preparation method of the present invention has simple process, mild conditions, low cost, environmental friendliness, and large-scale production; when organic matter polluted soil is repaired, the degradation of organic pollutants is efficient and fast, without secondary pollution and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of soil chemical oxidation restoration, and in particular relates to a preparation method of an additive for soil chemical oxidation restoration. Background technique [0002] Soil is an integral part of the earth's surface system, located in the center of the natural environment, at the interface and cross-section of the human wisdom circle, atmosphere, hydrosphere, biosphere and lithosphere, and is the link that combines the various components of the geographical environment. In recent years, with the development of society, soil pollution in my country has become increasingly serious, and organic pollutants are one of the main pollutants ubiquitous in soil. When the quantity and speed of these pollutants entering the soil exceed the purification effect of the soil itself, it will destroy the natural dynamic balance, so that the accumulation process of pollutants will gradually take the lead; at the same t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 韩凤国伟林卫静丁诗杨任梦郭怀苏韩雪梅
Owner UNIV OF JINAN
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