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Preparation method of cellulose-modified modified nano-iron particles

A technology of modification and nano-iron, which is applied in the field of water treatment, can solve the problems of loss of reactive sites of nano-zero-valent iron particles, reduction of effective contact area of ​​pollutants, unfavorable environmental pollution restoration work, etc., to achieve easy engineering The effect of chemical application, good environmental friendliness, and good particle uniformity

Active Publication Date: 2017-06-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its own magnetic attraction, nano-zero-valent iron particles are easy to cause agglomeration, thus losing a large number of reactive sites of nano-zero-valent iron particles. The severe agglomeration of particles reduces the effective contact area with pollutants and reduces the degradation efficiency.
And the agglomeration greatly reduces the mobility of nano-iron in environmental water and soil, which is not conducive to the restoration of environmental pollution

Method used

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  • Preparation method of cellulose-modified modified nano-iron particles
  • Preparation method of cellulose-modified modified nano-iron particles
  • Preparation method of cellulose-modified modified nano-iron particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation and crystal structure analysis of nanometer zero-valent iron

[0030] (1) Preparation of unmodified nano zero-valent iron

[0031] 100ml of 5.0 mol / L potassium borohydride solution was dropped into 100ml of FeSO with a concentration of 0.9 mol / L 4 In the solution, stir while dripping, and continue stirring for 15 minutes after the addition of the solution is complete, filter the solution that has completely reacted, and rinse the obtained filter cake with deionized water for 3 times and then filter dry to obtain nanometer zero-valent iron particles; use acetone and After rinsing the nano-iron particles with anhydrous ethanol mixture (volume ratio of acetone and absolute ethanol: 1:5), the nano-iron particles were filtered and vacuum-dried, and the dried particles were ground and sealed to obtain unmodified nano-zero-valent iron .

[0032] (2) Preparation of hydroxyethyl cellulose modified nanometer zero-valent iron

[0033] Mix 10 g / L hydroxyet...

Embodiment 2

[0038] Example 2: Analysis of agglomeration degree of nano-zero-valent iron and cellulose-modified modified nano-iron particles

[0039] (1) Preparation of unmodified nano zero-valent iron particles

[0040] 100ml of 3.0 mol / L potassium borohydride solution is dropped into 100ml of FeSO with a concentration of 1.5mol / L 4 In the solution, stir while dripping, continue to stir for 40min after the addition of the solution is completed, filter the solution that has reacted completely, and filter the obtained filter cake to rinse with deionized water for 5 times to obtain nanometer zero-valent iron particles; use acetone and The nano-iron particles obtained by washing with anhydrous ethanol mixture (acetone and ethanol volume ratio 1:9) were washed twice, then vacuum-dried after suction filtration, and the dried particles were ground and sealed to obtain unmodified nano-sized zero-valent iron.

[0041] (2) Preparation of hydroxyethyl cellulose modified nanometer zero-valent iron ...

Embodiment 3

[0047] Example 3: Specific surface area (BET) analysis of cellulose-modified modified nano-iron particles

[0048] (1) Preparation of unmodified nano zero-valent iron particles

[0049] 100ml of 1.0 mol / L potassium borohydride solution was dropped into 100ml of FeSO with a concentration of 0.5 mol / L 4 In the solution, stir while dripping, and continue stirring for 5 minutes after the addition of the solution is complete, filter the solution that has completely reacted, and rinse the obtained filter cake with deionized water for 3 times and then filter dry to obtain nanometer zero-valent iron particles; use acetone and After rinsing the nano-iron particles with anhydrous ethanol mixture (volume ratio of acetone and ethanol: 1:5), the nano-iron particles were filtered and vacuum-dried, and the dried particles were ground and sealed to obtain unmodified nano-sized zero-valent iron.

[0050] (2) Preparation of hydroxyethyl cellulose modified nanometer zero-valent iron

[0051] M...

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Abstract

The invention discloses a method for modifying nano iron particles on the surface of cellulose. The invention uses two kinds of environment-friendly, non-toxic, harmless cellulose as dispersants, and in the preparation process of the nano iron particles, the surface of the particles is surface-treated. Modified and modified, the prepared cellulose dispersant modified nano iron particles. The process of the invention is simple and easy to operate, low in cost, and has good dispersibility of the nano-iron particles, which can reduce the agglomeration of the particles in water and improve the removal efficiency of the particles to organic pollutants, dyes, pesticides, nitrates and heavy metals.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a preparation method of cellulose-modified nano-iron particles, and the application of the particles to the removal of organic pollutants in water, the decolorization of dye wastewater, the degradation of antibiotics in wastewater and the removal of water heavy metal. Background technique [0002] The amount of sewage discharged in my country is huge. According to different production methods, the average production of 1 ton of products needs to discharge 40-300m 3 waste water. According to incomplete statistics, the discharge of printing and dyeing wastewater in my country is about 3×10 per day. 6 ~4×10 6 m 3 , The textile industry and the printing and dyeing industry produce a large amount of dye wastewater every year due to its high chroma and potential toxicity. The methods commonly used in traditional wastewater treatment are: physical adsorption (such as activate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00C02F1/62C02F1/58
Inventor 王向宇王培
Owner KUNMING UNIV OF SCI & TECH
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