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Organically modified biotite-loaded ultrafine nano-zero-valent zinc suitable for degradation of heavy non-aqueous halogenated pollutants and preparation method thereof

An ultra-fine nano and biotite technology, which is applied in the direction of water pollutants, contaminated groundwater/leachate treatment, nanotechnology, etc., can solve problems such as degradation, and achieve the effects of improved response ability, strong applicability, and low cost

Active Publication Date: 2022-06-24
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide an organically modified biotite-loaded ultrafine nano-zero-valent zinc suitable for the degradation of halogenated pollutants and its preparation method, the zero-valent zinc material It is used to treat halogenated pollutants in the heavy non-aqueous phase of groundwater, and can solve the key problem of degrading halogenated organic pollutants in the DNAPL phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] ·Put the biotite into deionized water and stir for 24h according to the dosage of biotite 20g / L, and then separate the solid biotite particles. This process is repeated twice. Then add 0.1M ZnCl to the biotite particles after washing twice according to the dosage of biotite 10g / L. 2 The solution was mixed for about 18 hours under stirring, and the supernatant was discarded by centrifugation to retain the solid biotite particles. The above process was repeated 5 times to obtain zinc ion-saturated biotite particles. 0.5 g of the obtained zinc ion-saturated biotite particles were mixed with 30 mL of Ce(BH 4 ) 3 The aqueous solution was stirred for 15 min under anaerobic conditions to obtain unmodified biotite-supported ultrafine nano-zero valent zinc.

[0039] · ZnCl in the above process 2 with FeCl 3 Instead, the other parameters are exactly the same as the procedure to prepare unmodified biotite with built-in ultrafine zero-valent iron.

[0040] ·Add 0.2g biotite-lo...

Embodiment 2

[0043] ·Put the biotite into deionized water and stir for 24h according to the dosage of biotite 30g / L, and then separate the solid biotite particles. The process is repeated twice. Then add 0.1M ZnCl to the biotite particles after washing twice according to the biotite dosage of 15g / L. 2 The solution was mixed for about 18 hours under stirring, and the supernatant was discarded by centrifugation to retain the solid biotite particles. The above process was repeated 5 times to obtain zinc ion-saturated biotite particles. Mix 0.5 g of the obtained zinc ion-saturated biotite particles with 30 mL of Ce(BH 4 ) 3 The aqueous solution was stirred for 15 min under anaerobic conditions to obtain unmodified biotite-supported ultrafine nano-zero valent zinc.

[0044] ·Replace biotite with montmorillonite in the above process, Ce(BH 4 ) 3 with NaBH 4 Instead, other parameters are exactly the same as the process to prepare ultrafine zero-valent zinc built into montmorillonite.

[004...

Embodiment 3

[0048] ·Put the biotite into deionized water and stir for 24h according to the dosage of biotite 40g / L, and then separate the solid biotite particles. This process is repeated twice. Then add 0.1M ZnCl to the biotite particles after washing twice according to the dosage of biotite 20g / L. 2The solution was mixed for about 18 hours under stirring, and the supernatant was discarded by centrifugation to retain the solid biotite particles. The above process was repeated 5 times to obtain zinc ion-saturated biotite particles. 0.5 g of the obtained zinc ion-saturated biotite particles were mixed with 30 mL of Ce(BH 4 ) 3 The aqueous solution was stirred for 15 min under anaerobic conditions to obtain unmodified biotite-supported ultrafine nano-zero valent zinc.

[0049] ·Put the biotite into deionized water and stir for 24h according to the dosage of 40g / L of biotite, and then separate the solid particles. This process is repeated twice. Add 0.1M ZnCl to the particles after washin...

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Abstract

The invention discloses an organically modified biotite-loaded ultrafine nanometer zero-valent zinc suitable for the degradation of heavy non-aqueous phase halogenated pollutants and a preparation method thereof. After washing biotite with water, add ZnCl 2 Mix in the solution to obtain zinc ion-saturated biotite; mix n-hexanol, dedecyltrimethylammonium bromide and n-hexane, then add azobisisobutyronitrile and acetoacetoxyethyl methacrylate, fully Stir to form transparent micelles to obtain monomer solution 1; add Ce(BH 4 ) 3 Stir and mix to obtain monomer solution 2; mix monomer solution 1, monomer solution 2 and zinc ion-saturated biotite particles, and undergo scaffolding polymerization to obtain organically modified biotite-loaded ultrafine nanometer zero-valent zinc . The organically modified biotite embedded with nanometer zero-valent zinc can not only improve the agglomeration form of the zero-valent zinc in the DNAPL phase, but also enable the reaction domain of the zero-valent zinc to retain water in the DNAPL phase, and has high-efficiency degradation activity.

Description

technical field [0001] The invention belongs to the technical field of groundwater environmental pollution remediation, and relates to a biotite-loaded ultra-fine nano-zero-valent zinc with self-carrying water, which is suitable for the degradation of heavy non-aqueous phase (DNAPL) halogenated pollutants in groundwater, and a preparation method thereof. , specifically relates to an organically modified biotite loaded ultra-fine nano zero-valent zinc suitable for the degradation of heavy non-aqueous halogenated pollutants and a preparation method thereof. Background technique [0002] Groundwater heavy organic phase liquid pollutants (DNAPLs), due to their higher density and lower solubility than water, penetrate the groundwater to reach the water-retaining floor and diffuse laterally after entering the underground environment, thus becoming a persistent source of DNAPLs pollution. Among them, halogenated DNAPL pollutants, such as trichloroethylene, tetrachloroethylene, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00C01B33/42C02F1/70C02F101/36C02F103/06
CPCB22F9/24B82Y40/00C01B33/42C02F1/705C02F2101/36C02F2103/06
Inventor 喻恺吕燕妮肖潇罗旭彪杨利明石慧邵鹏辉任重熊贞晟
Owner NANCHANG HANGKONG UNIVERSITY
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