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Application of CMC-coated modified nano-Fe/Cu bimetallic packing in removal of 2,4-DCP

A 4-DCP, bimetallic technology, applied in the field of materials, can solve the problems of easy agglomeration and oxidation, inability to degrade low-chlorinated organic compounds, limited reducing ability, etc., and achieve the effect of low cost

Inactive Publication Date: 2019-04-26
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZVI has two obvious shortcomings, that is, it is very easy to agglomerate and oxidize in the groundwater environment, and its reducing ability is limited, so it cannot effectively degrade low-chlorinated organic compounds.

Method used

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  • Application of CMC-coated modified nano-Fe/Cu bimetallic packing in removal of 2,4-DCP
  • Application of CMC-coated modified nano-Fe/Cu bimetallic packing in removal of 2,4-DCP
  • Application of CMC-coated modified nano-Fe/Cu bimetallic packing in removal of 2,4-DCP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the modified nanometer Fe / Cu bimetal filler of CMC coating, comprises the steps:

[0035] (1) Under the protection of nitrogen, take 0.8g of CMC, mix it with 300mL of anaerobic water, and stir until it becomes a transparent viscous liquid;

[0036] (2) Under nitrogen protection, get 4.98g of ferrous sulfate heptahydrate and join in the viscous liquid that step (1) obtains, keep stirring for 5min, drip concentration is 28g / L, the sodium borohydride aqueous solution of 50mL, After the dropwise addition, continue to stir for 15 minutes, filter, rinse with absolute ethanol for 3 times, and dry under vacuum conditions to obtain modified NZVI, which is dissolved in water to obtain a modified NZVI aqueous solution;

[0037] (3) Under the protection of nitrogen, weigh 0.1255g of anhydrous copper sulfate, dissolve it in water, drop it into the modified NZVI aqueous solution under stirring, continue stirring for 10min after the dropwise addition, filter,...

Embodiment 2

[0039] The preparation method of the modified nanometer Fe / Cu bimetal filler of CMC coating, comprises the steps:

[0040] (1) Under nitrogen protection, take 0.6g of CMC, mix it with 100mL of oxygen-free water, and stir until it becomes a transparent viscous liquid;

[0041] (2) Under the protection of nitrogen, take 4.964g of ferrous sulfate heptahydrate and add it to the viscous liquid obtained in step (1), keep stirring for 3min, and drop in a concentration of 27.14g / L, 40mL of sodium borohydride aqueous solution After the dropwise addition, continue to stir for 10 min, filter, rinse twice with absolute ethanol, and dry under vacuum conditions to obtain modified NZVI, and dissolve the modified NZVI in water to obtain a modified NZVI aqueous solution;

[0042] (3) Under the protection of nitrogen, weigh 0.125g of anhydrous copper sulfate, dissolve it in water, drop it into the modified NZVI aqueous solution under stirring, continue stirring for 5min after the dropwise addit...

Embodiment 3

[0044] The preparation method of the modified nanometer Fe / Cu bimetal filler of CMC coating, comprises the steps:

[0045] (1) Under the protection of nitrogen, take 0.7g of CMC, mix it with 500mL of anaerobic water, and stir until it becomes a transparent viscous liquid;

[0046] (2) Under the protection of nitrogen, take 5.014g of ferrous sulfate heptahydrate and add it to the viscous liquid obtained in step (1), continue stirring for 7min, and drop in a concentration of 30.16g / L, 60mL of sodium borohydride aqueous solution After the dropwise addition, continue to stir for 20 minutes, filter, rinse with absolute ethanol for 4 times, and dry under vacuum conditions to obtain modified NZVI, and dissolve the modified NZVI in water to obtain a modified NZVI aqueous solution;

[0047] (3) Under the protection of nitrogen, weigh 0.126g of anhydrous copper sulfate, dissolve it in water, drop it into the modified NZVI aqueous solution under stirring, continue to stir for 15min after...

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Abstract

The invention discloses application of CMC-coated modified nano-Fe / Cu bimetallic packing in removal of 2,4-DCP. Raw materials are common and easy to obtain, the cost is low, and the oxidation resistance and the dispersibility of the CMC-coated modified nano-Fe / Cu bimetallic packing are high. The CMC-coated modified nano-Fe / Cu bimetallic packing can continuously work for a longer time by serving asa disposable material; and the CMC-coated modified nano-Fe / Cu bimetallic packing has the high degradation effect on chlorine-containing organic matter, especially 2,4-DCP.

Description

technical field [0001] The invention belongs to the field of materials, and relates to the use of a CMC-coated modified nano-Fe / Cu bimetallic filler for removing 2,4-dichlorophenol in groundwater. Background technique [0002] Chlorophenols are toxic pollutants widely present in industrial and urban wastewater[1][2]. Among them, 2,4-dichlorophenol (2,4-DCP) has neurotoxicity and can alter antioxidant enzymes in the human body. activity, triggering oxidative stress[3]. It is an intermediate transformed from the broad-spectrum antibacterial agent triclosan and the herbicide 2,4-dichlorophenoxyacetic acid and high 2,4-dipropionic acid into the environment . Herbicides are widely used in agricultural cultivation, so 2,4-dichlorophenol is commonly detected in surface water near rice fields [4]. The substance has a certain stability. After entering the ground, it migrates and spreads with the groundwater, and the scope of pollution will be further expanded [5]. Therefore, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02C02F1/70C02F101/34C02F101/36C02F103/06
CPCC02F1/705B22F9/24C02F2101/345B22F2009/245B22F1/054B22F1/065B22F1/102
Inventor 潘煜孙力平
Owner TIANJIN CHENGJIAN UNIV