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Multi-effect composite repair material for organic pollution groundwater remediation

A groundwater remediation and composite remediation technology, applied in the direction of contaminated groundwater/leachate treatment, water pollutants, water/sewage treatment, etc., can solve the problems of single function, high price, secondary pollution, etc., and achieve enhanced biological treatment process, low cost, and intensifies the effect of the restoration process

Active Publication Date: 2018-06-29
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, the restoration materials used in in-situ restoration have single functions, and the restoration activity and efficiency need to be improved urgently. They are also expensive, use a large amount, react slowly, and easily form secondary pollution, etc.

Method used

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  • Multi-effect composite repair material for organic pollution groundwater remediation
  • Multi-effect composite repair material for organic pollution groundwater remediation
  • Multi-effect composite repair material for organic pollution groundwater remediation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The composite repair material was prepared according to the preparation ratio of 20 parts of natural manganese ore particles, 35 parts of oxygen-releasing material, 8 parts of additive, 15 parts of biochar, 5 parts of modified ultrafine zinc oxide, and 17 parts of pH buffering agent.

[0043] The composite restorative material and calcium peroxide agent were weighed separately to ensure that the dosage of calcium peroxide was 1 g / L. The two materials were respectively placed in 50 mL of anaerobic water, and under airtight conditions, the DO concentration change of the solution was regularly measured, and the results were as follows: figure 2 shown. At the initial stage of oxygen release, calcium peroxide reacted quickly with water, and the dissolved oxygen concentration in the water reached nearly 6 mg / L after 10 hours, and then the dissolved oxygen in the water basically stabilized at about 6 mg / L. However, the oxygen release rate of the composite restorative materia...

Embodiment 2

[0045] The composite repair material was prepared according to the preparation ratio of 20 parts of natural manganese ore particles, 35 parts of oxygen-releasing material, 8 parts of additive, 15 parts of biochar, 5 parts of modified ultrafine zinc oxide, and 17 parts of pH buffering agent. The composite restorative material and calcium peroxide agent were weighed to ensure that the dosage of calcium peroxide was 1 g / L. The two materials were respectively placed in 50 mL of anaerobic water, and the pH changes of the solutions were regularly measured under airtight conditions, and the results were as follows: image 3 shown. When calcium peroxide was added as an oxygen-releasing agent, the pH rose rapidly to 11.0 within 10 minutes, and then stabilized at about 11.2 in the next 5 hours. After adding the composite restorative material of the present invention, the pH of the solution rose to 8.5 after 1 hour, and then basically stabilized at about 8.8. The composite restorative ...

Embodiment 3

[0047] The multi-effect composite restoration material was prepared according to the preparation ratio of 20 parts of natural manganese ore particles, 35 parts of oxygen-releasing material, 8 parts of additive, 15 parts of biochar, 5 parts of modified ultrafine zinc oxide, and 17 parts of pH buffering agent. The composite restorative material prepared above was placed in 100 mg / L phenol anaerobic solution with a dose of 5 g / L. After 24 h of reaction, the concentration of phenol and TOC in the solution were measured. The results showed that after 24 hours, the removal efficiency of phenol reached 95.3%, and the removal rate of TOC reached 92.1%.

[0048] The multi-effect composite restoration material was prepared according to the preparation ratio of 22 parts of natural manganese ore particles, 38 parts of oxygen-releasing material, 5 parts of additive, 10 parts of biochar, 6 parts of modified ultrafine zinc oxide, and 19 parts of pH buffering agent. The composite restorative...

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Abstract

The invention discloses a multi-effect composite repair material for organic pollution groundwater remediation. The multi-effect composite repair material is characterized by being prepared from the following components in parts by weight based on the total parts by weight being 100 parts: 10-35 parts of natural cryptomelane particles, 20-45 parts of an oxygen-release material, 5-18 parts of additives, 10-25 parts of biochar, 5-20 parts of modified ultrafine zinc oxide, and 15-30 parts of a pH buffer agent. The multi-effect composite repair material prepared by the invention has stable properties, large surface area and better adsorption and catalytic oxidation activity, is long in oxygen release duration and high in release efficiency, and can guarantee the sustainability of a groundwaterbioremediation effect; the multi-effect synergy of adsorption, chemical oxidation, catalytic oxidation and bioremediation is realized, and the problems that the existing groundwater remediation agentis single in treatment function and poor in control of treatment effect, and causes secondary pollution can be solved; therefore, the multi-effect composite repair material for the organic pollutiongroundwater remediation is a multifunctional groundwater remediation agent which is in line with the concept of green and sustainable restoration.

Description

technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to a multi-effect composite restoration material for organically polluted groundwater restoration. Background technique [0002] Groundwater is an important part of freshwater resources and plays a pivotal role in the development of human society. However, the random stacking of industrial waste, the extensive use of pesticides and fertilizers, and the leakage during oil extraction, transportation, loading and unloading, storage, processing, and use have all caused serious water and soil pollution and posed a huge threat to public health. With the rapid development of my country's industry and agriculture, more and more organic chemical pollutants enter the natural environment, and seep into the soil environment with the surface runoff, and then enter the groundwater environment, making the quality of my country's groundwater worsening day by day, and the...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F7/00C02F1/28C02F1/66C02F1/72C02F101/30C02F101/34C02F103/06
CPCC02F1/281C02F1/283C02F1/66C02F1/72C02F1/725C02F3/02C02F7/00C02F2101/30C02F2103/06C02F2101/345Y02W10/10
Inventor 徐伟殷瑶张辰谭学军朱煜
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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