A preparation method of a multi-effect restoration material for the restoration of organically polluted groundwater

A groundwater remediation and organic pollution technology, applied in the direction of polluted groundwater/leachate treatment, water pollutants, chemical instruments and methods, etc., can solve the problems of high price, secondary pollution, single function, etc. Agglomerates, promotes bioremediation, overcomes the effects of single treatment functions

Active Publication Date: 2021-12-03
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 preparation method of a multi-effect restoration material for the restoration of organically polluted groundwater
  • A preparation method of a multi-effect restoration material for the restoration of organically polluted groundwater
  • A preparation method of a multi-effect restoration material for the restoration of organically polluted groundwater

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preparation example Construction

[0033] A method for preparing a multi-effect restoration material for the restoration of organically polluted groundwater, characterized in that the preparation method of the multi-effect restoration material comprises the following steps:

[0034] A. After the natural manganese ore is put into a ball mill for 8-12 hours, it is sieved to obtain natural manganese ore particles with a particle size of 80-150 mesh, a pore structure, and a pore size of 0.46-50.00 nm;

[0035] B. Preparation of biochar: Wash the biomass and soak it in 3.5-5.5 mg·g-1 KOH solution for 30 hours, take it out, wash it and air-dry it, then put it in an oven at 50-60 ℃ for overnight drying, and put the dried The biomass is pyrolyzed at medium temperature and anoxic for 3-8 hours to obtain biochar, which is crushed to 50-80 mesh and sealed for later use;

[0036] C. Preparation of modified ultrafine zinc oxide:

[0037] ① Put zinc acetate and sodium acetate in a ball mill and mill for 15 minutes. When the...

Embodiment 1

[0051] The multi-effect restorative 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.

[0052] Weigh the multi-effect composite restoration material and the calcium peroxide agent respectively to ensure that the dosage of the calcium peroxide component is 1g / 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 t...

Embodiment 2

[0054] The multi-effect restorative 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. Weigh the multi-effect restoration material and calcium peroxide agent to ensure that the dosage of calcium peroxide is 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 multi-effect repairing 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 multi-effect compo...

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Abstract

The invention discloses a method for preparing a multi-effect restoration material for the restoration of organically polluted groundwater. composite process. The multi-effect restoration material prepared by the present invention has stable properties, large surface area, and good adsorption and catalytic oxidation activity; the oxygen release lasts for a long time, and the release efficiency is high, which can ensure the sustainability of the groundwater bioremediation effect; realizes adsorption, chemical The multi-effect synergy of oxidation, catalytic oxidation and bioremediation 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 remediation that conforms to the concept of green and sustainable restoration. potion.

Description

technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to a preparation method of a multi-effect restoration material used for restoration of organic polluted groundwater. 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 d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02C02F3/34B01J20/20C02F101/30
CPCB01J20/04B01J20/06B01J20/12B01J20/20B01J2220/42C02F3/02C02F3/34C02F2101/30C02F2103/06Y02W10/10
Inventor 徐伟殷瑶张辰谭学军朱煜
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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