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Nanometer zero-valent iron-loaded lignin-grafted bentonite composite material and preparation method thereof

A nano-zero-valent iron and composite material technology, applied in chemical instruments and methods, other chemical processes, processing wastewater treatment, etc., can solve the problems of narrow application range, unsatisfactory treatment effect, inapplicability, etc. Improved stability, good treatment effect, good adsorption capacity

Inactive Publication Date: 2017-08-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, although there have been published literatures on the application of bentonite-loaded nano-zero-valent iron in sewage treatment, nano-zero-valent iron is simply loaded on the surface of bentonite, and the adsorption of bentonite and nano-zero-valent iron are mainly used in the process of sewage treatment. The strong reduction effect of valent iron firstly adsorbs the pollutants on the surface of bentonite, and then the nano-zero-valent iron can reduce and degrade the pollutants. Although this method can reduce the agglomeration of nano-zero-valent iron, agglomeration still occurs, and in Nano zero-valent iron is easily oxidized in the actual sewage treatment process, which greatly reduces the use efficiency, making the treatment effect unsatisfactory, and the scope of application is narrow, not suitable for sewage with high COD and chroma

Method used

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  • Nanometer zero-valent iron-loaded lignin-grafted bentonite composite material and preparation method thereof
  • Nanometer zero-valent iron-loaded lignin-grafted bentonite composite material and preparation method thereof
  • Nanometer zero-valent iron-loaded lignin-grafted bentonite composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] At 25°C, dissolve 9.66g of ferric chloride in 50ml of distilled water, transfer to a three-necked flask, blow nitrogen, and stir. Subsequently, 2 g of bentonite and 2 g of lignin were added to the three-necked flask, and vigorously stirred for 30 minutes. After the stirring is completed, dissolve 3.54g of sodium borohydride in 100ml of distilled water, and add it into the three-neck flask at a rate of 1-2 drops per second, and stir for 10 minutes after the dropwise addition is completed. Then, 2 g of acrylamide was dissolved in 10 ml of distilled water, and 0.4 g of N,N'-methylenebisacrylamide was dissolved in 20 ml of distilled water, which were successively added into a three-necked flask and stirred for 30 minutes. After the stirring was completed, 0.2 g of potassium persulfate was dissolved in 10 ml of distilled water, added into a three-necked flask, and 100 microliters of N,N,N,N-tetramethylethylenediamine was added, and stirred for 30 minutes. The product was va...

Embodiment 2

[0031] At 30°C, dissolve 9.66g of ferric chloride in 50ml of distilled water, transfer to a three-necked flask, blow nitrogen, and stir. Subsequently, 2 g of bentonite and 2 g of lignin were added to the three-necked flask, and vigorously stirred for 30 minutes. After the stirring is completed, dissolve 3.54g of sodium borohydride in 100ml of distilled water, and add it into the three-neck flask at a rate of 1-2 drops per second, and stir for 10 minutes after the dropwise addition is completed. Subsequently, 3 g of acrylamide was dissolved in 10 ml of distilled water, and 0.3 g of N,N'-methylenebisacrylamide was dissolved in 20 ml of distilled water, which were successively added into a three-necked flask and stirred for 30 minutes. After the stirring was completed, 0.3 g of potassium persulfate was dissolved in 10 ml of distilled water, and added to a three-neck flask, and 100 microliters of N,N,N,N-tetramethylethylenediamine was added, and stirred for 30 minutes. The produc...

Embodiment 3

[0033] At 30°C, dissolve 9.66g of ferric chloride in 50ml of distilled water, transfer to a three-necked flask, blow nitrogen, and stir. Subsequently, 2 g of bentonite and 2 g of lignin were added to the three-necked flask, and vigorously stirred for 30 minutes. After the stirring is completed, dissolve 3.54g of sodium borohydride in 100ml of distilled water, and add it into the three-neck flask at a rate of 1-2 drops per second, and stir for 10 minutes after the dropwise addition is completed. Then, 4 g of acrylamide was dissolved in 10 ml of distilled water, and 0.2 g of N,N'-methylenebisacrylamide was dissolved in 20 ml of distilled water, which were successively added into a three-necked flask and stirred for 30 minutes. After the stirring was completed, 0.5 g of potassium persulfate was dissolved in 10 ml of distilled water, and added to a three-neck flask, and 100 microliters of N,N,N,N-tetramethylethylenediamine was added, and stirred for 1 h. The product was vacuum fi...

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Abstract

The invention discloses a nanometer zero-valent iron-loaded lignin-grafted bentonite composite material and a preparation method thereof, belonging to the technical field of functional materials. The composite material is characterized in that bentonite is grafted with lignin and is then loaded with nanometer zero-valent iron. Compared with the prior art, the composite material provided by the invention has the following advantages: nanometer zero-valent iron in the composite material has obviously improved dispersibility and stability, good wastewater treatment capability, and good promotion and application value.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a lignin-grafted bentonite-loaded nano-zero-valent iron composite material and a preparation method thereof. Background technique [0002] Nano-ZVI particles exhibit excellent physical and chemical properties in the removal of some organic matter in polluted water and other environmental restoration issues. However, due to the magnetic nature of the nanometer zero-valent iron particles and their high activity, the zero-valent iron particles prepared by the current method are very easy to react with the surrounding medium or agglomerate to form larger flocs, resulting in a decrease in activity, which is extremely unfavorable to the environment. Contaminated remediation work. Therefore, increasing Fe 0 The degree of dispersion is crucial to enhance its activity and efficiency. [0003] Bentonite, as an inexpensive and efficient adsorbent, has great potential to remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/70C02F103/28
CPCB01J20/12B01J20/24C02F1/281C02F1/286C02F1/705C02F2103/28
Inventor 王振迟泽旭楚焕庆刘玉杨桂花
Owner QILU UNIV OF TECH
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