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Photo catalytic oxidation-based POPs (persistent organic pollutants)-containing soil ex-site rapid disposal method

A technology of photocatalytic oxidation and disposal method, applied in the restoration of polluted soil, etc., can solve the problems of long treatment period, difficult biological acquisition, insoluble in water, etc., and achieve the effect of promoting microbial metabolism

Inactive Publication Date: 2017-12-01
青岛华茂环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is ecological, the treatment cycle is long, because POPs are difficult to dissolve in water and are not easily obtained by organisms. At the same time, there are few degrading bacteria in the soil itself, but it is difficult to degrade without adding microorganisms.

Method used

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  • Photo catalytic oxidation-based POPs (persistent organic pollutants)-containing soil ex-site rapid disposal method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] The POPs concentration in the treated POPs-containing soil was 1543mg / kg.

[0026] Excavate the POPs-containing soil from the polluted site and transfer it to the storage yard; lay an anti-seepage layer in the storage yard, lay a diversion material at the bottom, and lay a mixed layer of biogas residue, bacterial agent, carbon source, nutrient additives, and POPs-containing soil on the upper part , the mixing ratio is 1:0.2:0.2:0.15:0.1 for POPs-containing soil, biogas residue, carbon source, bacterial agent and nutritional additives, and the layer height is 5m. Titanium-containing materials and nano-iron materials are placed on the upper part of the mixed layer. The height is 0.1m; during operation, inject carbon source solution from the upper part of the stockyard every 1-5 days, then collect the leachate into the leachate collection system through the bottom diversion material, and then drain the leachate every 1-2 days Return to the upper part of the stockyard for r...

example 2

[0029] The POPs concentration in the treated POPs-containing soil was 345mg / kg.

[0030] Excavate the POPs-containing soil from the polluted site and transfer it to the storage yard; lay an anti-seepage layer in the storage yard, lay a diversion material at the bottom, and lay a mixed layer of biogas residue, bacterial agent, carbon source, nutrient additives, and POPs-containing soil on the upper part , the mixing ratio is 1:0.1:0.2:0.05:0.05 for POPs-containing soil, biogas residue, carbon source, bacterial agent and nutritional additives, and the layer height is 5m. Titanium-containing materials and nano-iron materials are placed on the upper part of the mixed layer. Height 0.01m; during operation, inject carbon source solution from the upper part of the stockyard every 1-5 days, then collect the leachate into the leachate collection system through the bottom diversion material, and then drain the leachate every 1-2 days Return to the upper part of the storage yard for rech...

example 3

[0033] The POPs concentration in the treated POPs-containing soil was 926mg / kg.

[0034] Excavate the POPs-containing soil from the polluted site and transfer it to the storage yard; lay an anti-seepage layer in the storage yard, lay a diversion material at the bottom, and lay a mixed layer of biogas residue, bacterial agent, carbon source and POPs-containing soil on the upper part. The addition ratio of POPs-containing soil, biogas residue, carbon source, and bacterial agent is 1:0.1:0.1:0.05, the layer height is 5m, no nutritional additives are added, titanium-containing materials and nano-iron materials are placed on the upper part of the mixed layer, and the layer height is 0.1m ; During operation, inject carbon source solution from the upper part of the stockyard every 1-5 days, then collect the leachate into the leachate collection system through the bottom diversion material, and then return the leachate to the stockpile every 1-2 days The upper part of the field is rec...

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Abstract

The invention designs a method for rapidly disposing POPs-containing soil. The method comprises the following steps of digging the POPs-containing soil from a polluted field, and transferring the POPs-containing soil to a yard; laying an anti-seepage layer in the yard, laying a diversion material at the bottom of the anti-seepage layer, laying a mixed layer of biogas residues, a microorganism agent, a carbon source, a nutritional additive and the POPs-containing soil at the upper part of the anti-seepage layer, and placing a titanium-containing material and a nano-iron material at the upper part of the mixed layer; and in the running process, injecting a carbon source solution from the upper part of the yard irregularly, then collecting a leachate through the diversion material at the bottom into a leachate collection system, and then enabling the leachate to flow back to the upper part of the yard irregularly to carry out recharging. By using the method to treat the POPs-containing soil, the polluted oil can be remediated to the standard for a land for civil construction by only 10-60 days.

Description

technical field [0001] The invention provides a photocatalytic oxidation-based ectopic rapid disposal method of POPs-containing soil, which transfers biogas residues, bacterial agents, carbon sources, nutrients, and POPs-containing soil to the stockyard, and the leachate flows back through the titanium-containing material on the surface. The photolysis and catalysis effect, and then produce the Fenton effect with nano-iron, quickly degrade and degrade POPs, which belongs to the field of environmental protection. Background technique [0002] POPs is short for persistent organic pollutants, including polycyclic aromatic hydrocarbons, polychlorinated biphenyls and pesticides. With the development of industry and agriculture and the expansion of urbanization, a large amount of soil is polluted by POPs. At present, the POPs treatment methods mainly include thermal analysis method and advanced oxidation method. The thermal analysis method is costly and easy to generate air pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/08
CPCB09C1/10B09C1/08
Inventor 张大磊
Owner 青岛华茂环保科技有限公司