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Method for accelerating deoxidization, degradation and transformation of organic contamination in soil

A technology of organic pollutants and soil, which is applied in the field of accelerating the reduction, degradation and transformation of organic pollutants in soil, can solve the problems of accelerating the reduction, degradation and transformation of organic pollutants, achieve the use and play of the natural self-purification ability of soil, improve the self-purification ability and effect of soil Good results

Active Publication Date: 2009-09-09
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method that can accelerate the reduction, degradation and transformation of organic pollutants in the soil, aiming at the deficiencies existing in the restoration of existing soil organic pollutants

Method used

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  • Method for accelerating deoxidization, degradation and transformation of organic contamination in soil
  • Method for accelerating deoxidization, degradation and transformation of organic contamination in soil
  • Method for accelerating deoxidization, degradation and transformation of organic contamination in soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Zero-valent iron treatment of pentachlorophenol

[0034] The dosage of iron powder is 3g / L, the initial concentration of pentachlorophenol is 10mg / L, and the pH is adjusted to 3.00 with different organic acids (such as oxalic acid, acetic acid, citric acid, tartaric acid, etc.), inorganic acids (such as nitric acid) and NaOH , the experiment was carried out under the condition of avoiding light and passing nitrogen. A system without zero-valent iron was used as a control.

[0035] Samples were taken at regular intervals, the aqueous phase was tested for chloride ions, the organic extraction was constant to measure pentachlorophenol, and the treatment efficiency of zero-valent iron was analyzed. The results showed that the removal efficiency of pentachlorophenol was high. Because the higher the chlorine content of organic chlorine, the higher its toxicity, and in order to avoid the measurement error that may be caused by the process of organic solvent extracti...

Embodiment 2

[0038] Embodiment 2 soil colloid treatment pentachlorophenol

[0039] Two kinds of paddy soil surface soil colloids, Zini field and Qianjiao Zini field, were selected, and the primary equilibrium research method was adopted. The initial concentration of pentachlorophenol was 10mg / L. After adding 20ml of the reaction solution filled with nitrogen and oxygen for 24h in a 20ml vial, Then add 0.20g of soil colloid (10g / L), cover with a rubber cover, fill with nitrogen and de-oxygenate for 10 minutes, add an aluminum cover to seal, place in a constant temperature shaker at 25±1°C and shake continuously (200rpm), and take samples for analysis at regular intervals. At the same time, the treatment without soil colloid was set as the control. The results showed that the two kinds of soil colloids had a certain reduction and transformation effect on pentachlorophenol in solution, and the degradation of pentachlorophenol by soil colloids under the two conditions was in line with the appa...

Embodiment 3

[0040] Example 3 Planting corn to accelerate the degradation of organochlorine in the soil column test

[0041] Based on the high production of organic acids in the roots of corn during the growth process, the experiment was designed: as shown in Figure 1, in the soil column reactor, the zero-valent iron / soil weight ratio of 1:1-10 was blended with contaminated soil to fill the soil column In the reactor, use dilute acid to adjust the pH of the soil column system to be slightly acidic (6.0-6.5), add pentachlorophenol to an initial concentration of 10mg / kg, plant corn on the soil column, and plant 3 seeds on each soil column, so as not to plant corn soil column as a control. Soil samples were collected periodically for analysis. The results show that planting corn can significantly accelerate the degradation rate of pentachlorophenol in soil, and improve the degradability of zero-valent iron to pentachlorophenol in soil (such as Figure 4 ). After 30 days of the experiment, ...

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Abstract

The invention relates to the speeding up degradation of organic pollutant in the soil, which uses strong reduction feature of metal nulvalent, synthetic metal oxidation and hydro oxidation, effectively reducing organochlorine insecticide and other contaminating pollutant, improving the biological degradation feature of organic pollutant. The above pollutant can be further degraded with the participation of organic acid. It can effectively realize the original position restoring of contaminated soil, particularly for the control and restoring of heavy polluted soil.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for accelerating the reduction, degradation and conversion of organic pollutants in soil. Background technique [0002] Reducible pollutants in soil mainly include: halogenated aliphatic hydrocarbons, halogenated benzene, nitrobenzene, azo compounds, heavy metal ions, etc. These pollutants mainly come from industrial pollution sources, pesticides, chemical fertilizers, and agricultural use of solid waste; they remain in the soil for a long time, pollute groundwater through geochemical processes, and pollute the entire ecosystem, especially agricultural ecosystems, through biogeochemical processes , endangering the health of animals and humans through the food chain. From 2002 to 2004, the Guangdong Provincial Institute of Eco-environment and Soil Research conducted surveys in Guangzhou, Shantou, Foshan, Dongguan, Zhongshan, Shunde, Zhuhai, Huizhou and other citie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C09K17/00C09K17/02
Inventor 李芳柏侯梅芳刘新铭刘传平王旭刚曾芳刘亮
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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