Preparation method of soil chemical oxidation restoration additive

A technology of chemical oxidation and additives, applied in chemical instruments and methods, soil conditioning materials, organic fertilizers, etc., can solve the problems of chemical additives that are not easy to degrade, unsatisfactory effects, and many impurities, and achieve good application prospects, low cost, good processing effect

Active Publication Date: 2017-08-18
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 a soil chemical oxidation restoration additive. The method comprises the following steps: performing chemical reaction for reductive xylose and alpha-amino acid at high temperature in a nitrogen atmosphere, soaking obtained black precipitates into a strong alkaline solution, then dropwise adding a strong acid solution, precipitating the dissolved components, thus obtaining the soil chemical oxidation restoration additive; the additive is directly added into organic matters polluted soil, a potassium peroxodisulfate solution and a hydrogen peroxide solution are used as an oxidant, intrinsic iron-containing compounds in the soil are used as a catalyst, the organic pollutants in the soil are oxidized and degraded; and the preparation method is simple in process, moderate in conditions, low in cost, environment-friendly and capable of realizing mass production; and when the organic matter polluted soil is restored, the organic pollutants are efficiently and rapidly degraded, the secondary pollution is avoided, and the application prospect is wide.

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 Applications(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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