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Organically-modified superfine nanometer zero-valent zinc loaded on biotite suitable for heavy non-aqueous phase halogenated pollutant degrading and preparation method of organically-modified superfine nanometer zero-valent zinc loaded on biotite

An ultra-fine nanometer and biotite technology, applied in water pollutants, polluted groundwater/leachate treatment, nanotechnology, etc., can solve problems such as degradation, achieve small synthetic particle size, efficient degradation activity, and high reduction removal. The effect of efficiency

Active Publication Date: 2020-08-14
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 24 hours according to the dosage of biotite 20g / L, and then separate the solid biotite particles, and repeat the process twice. Add 0.1M ZnCl to the biotite particles washed twice according to the dosage of biotite 10g / L 2 The solution was mixed for about 18 hours under stirring, the supernatant was discarded by centrifugation to retain the solid biotite particles, and the above process was repeated 5 times to obtain zinc ion-saturated biotite particles. Mix 0.5 g of obtained zinc ion-saturated biotite particles with 30 mL of 0.2 M Ce(BH 4 ) 3 The aqueous solution was stirred for 15 minutes under anaerobic conditions to obtain unmodified biotite-supported ultrafine nanometer zero-valent zinc.

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

[0040] ·Add 0.2g biotite-loaded u...

Embodiment 2

[0043] ·Put the biotite into deionized water and stir for 24 hours according to the biotite dosage of 30g / L, and then separate the solid biotite particles, and repeat the process twice. Add 0.1M ZnCl to the biotite particles washed twice according to the dosage of biotite 15g / L 2 The solution was mixed for about 18 hours under stirring, the supernatant was discarded by centrifugation to retain the solid biotite particles, and the above process was repeated 5 times to obtain zinc ion-saturated biotite particles. Mix 0.5 g of obtained zinc ion-saturated biotite particles with 30 mL of 0.3 M Ce(BH 4 ) 3 The aqueous solution was stirred for 15 minutes under anaerobic conditions to obtain unmodified biotite-supported ultrafine nanometer zero-valent zinc.

[0044] Replacing biotite in the above process with montmorillonite, 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.

[...

Embodiment 3

[0048] ·Put the biotite into deionized water and stir for 24 hours according to the biotite dosage of 40g / L, and then separate the solid biotite particles, and repeat the process twice. Add 0.1M ZnCl to the biotite particles washed twice according to the dosage of biotite 20g / L 2The solution was mixed for about 18 hours under stirring, the supernatant was discarded by centrifugation to retain the solid biotite particles, and the above process was repeated 5 times to obtain zinc ion-saturated biotite particles. Mix 0.5 g of obtained zinc ion-saturated biotite particles with 30 mL of 0.4 M Ce(BH 4 ) 3 The aqueous solution was stirred for 15 minutes under anaerobic conditions to obtain unmodified biotite-supported ultrafine nanometer zero-valent zinc.

[0049] ·Put the biotite into deionized water and stir for 24 hours according to the dosage of biotite 40g / L, and then separate the solid particles. Repeat this process twice. Add 0.1M ZnCl to the particles after washing twice ...

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PUM

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Abstract

The invention discloses organically-modified superfine nanometer zero-valent zinc loaded on biotite suitable for heavy non-aqueous phase halogenated pollutant degrading and a preparation method of theorganically-modified superfine nanometer zero-valent zinc loaded on biotite. The method comprises the steps that the biotite is washed with water and added into a ZnCl2 solution, and uniform mixing is carried out to obtain zinc ion saturated biotite; n-hexanol, decyltrimethylammonium bromide and n-hexane are uniformly mixed, then azodiisobutyronitrile and acetoacetic acid ethyl methacrylate are added, and full stirring is carried out until a transparent micro-micelle shape is formed, so that a monomer solution 1 is obtained; Ce (BH4) 3 is added into the monomer solution 1, and uniform stirring is carried out to obtain a monomer solution 2; and the monomer solution 1, the monomer solution 2 and zinc ion saturated biotite particles are uniformly mixed, and a graft polymerization reaction isgenerated to obtain the organically-modified superfine nanometer zero-valent zinc loaded on biotite. According to the organically-modified superfine nanometer zero-valent zinc loaded on biotite, theagglomeration form of the zero-valent zinc in a DNAPL phase can be improved, the reaction domain of the zero-valent zinc can keep moisture in the DNAPL phase, and the high-efficiency degradation activity is achieved.

Description

technical field [0001] The invention belongs to the technical field of groundwater environmental pollution remediation, and relates to biotite-loaded ultrafine nanometer zero-valent zinc suitable for the degradation of groundwater heavy non-aqueous phase (DNAPL) halogenated pollutants with morphology optimization and self-carrying water and a preparation method thereof , specifically relates to 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. Background technique [0002] Groundwater heavy organic phase liquid pollutants (DNAPLs), due to their higher density than water and lower solubility, will penetrate into the underground environment to reach the water-resistant floor and spread laterally, thus becoming a persistent source of DNAPLs pollution. Among them, halogenated DNAPL pollutants, such as trichlorethylene, tetrachlorethylene, and...

Claims

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Application Information

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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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