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A multi-effect composite remediation material for remediation of organically polluted groundwater

A groundwater remediation and composite remediation technology, applied in the treatment of polluted groundwater/leachate, water pollutants, water/sewage treatment, etc., can solve the problems of single function, secondary pollution, large usage, etc. Single function, promoting bioremediation and stable properties

Active Publication Date: 2022-05-06
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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  • A multi-effect composite remediation material for remediation of organically polluted groundwater
  • A multi-effect composite remediation material for remediation of organically polluted groundwater
  • A multi-effect composite remediation material for remediation of organically polluted groundwater

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 restoration material for the restoration of organically polluted groundwater, which is characterized in that the parts by weight of each component of the multi-effect composite restoration material are: natural manganese-potassium ore particles 10-35 parts, 20-45 parts of oxygen-releasing material, 5-18 parts of additive, 10-25 parts of biochar, 5-20 parts of modified ultrafine zinc oxide, and 15-30 parts of pH buffering agent. The multi-effect composite restoration material prepared by the invention has stable properties, large surface area, good adsorption and catalytic oxidation activity; long oxygen release duration and high release efficiency, which can ensure the sustainability of groundwater bioremediation effect; realize adsorption, The multi-effect synergy of chemical oxidation, catalytic oxidation and biological remediation overcomes the problems of single treatment function of existing groundwater remediation agents, poor control of treatment effects, and secondary pollution. It is a multifunctional groundwater that conforms to the concept of green and sustainable restoration. Restoration Potion.

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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Patent Type & Authority Patents(China)
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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