Preparation method of water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities

A technology of nano-zero-valent iron and carbon composite materials, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low removal efficiency of lead ions and cadmium ions, reduce the risk of loss, improve Environmental and economic benefits, efficient removal effect

Pending Publication Date: 2019-12-13
KETAN XIAMEN NEW CARBON MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to provide a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading, so as to solve the problem of low removal efficiency of lead ions and cadmium ions by existing water purification carbons

Method used

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  • Preparation method of water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities
  • Preparation method of water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities
  • Preparation method of water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities

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Embodiment 1

[0052] This embodiment provides a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading, the method comprising the following steps:

[0053] S1. Screen activated carbon particles with a particle size of 1.0-1.5 mm, clean them with deionized water, and dry them for later use.

[0054] S2. Weigh FeSO according to the mass ratio of iron element to activated carbon as 1:100 4 ·7H 2 O, add 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent of 8:2, and polyethylene glycol-200 of 0.1g, stirrer speed is 400r / min, room temperature, feed N 2 , the reaction time was 120min, and a mixed solution was prepared. Polyethylene glycol-200 as used herein refers to polyethylene glycol with molecular weight not greater than 200.

[0055] S3. Add 20 g of the cleaned activated carbon particles into the mixed solution prepared in step S2 and stir for 120 minutes.

[0056] S4. Add 100mL sodium boro...

Embodiment 2

[0065] This embodiment provides a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading, the method comprising the following steps:

[0066] S1. Screen activated carbon particles with a particle size of 1.0-1.5 mm, clean them with deionized water, and dry them for later use.

[0067] S2, according to the mass ratio of iron element and activated carbon as 1:200, take FeSO 4 ·7H 2 O, add 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent of 8:2, and polyethylene glycol-200 of 0.1g, stirrer speed is 400r / min, room temperature, feed N 2 , and the reaction time was 120min to prepare a mixed solution. Polyethylene glycol-200 as used herein refers to polyethylene glycol with molecular weight not greater than 200.

[0068] S3. Add 40 g of the cleaned activated carbon particles into the mixed solution prepared in step S2 and stir for 120 minutes.

[0069] S4. Add 100mL sodium borohy...

Embodiment 3

[0078] This embodiment is a research experiment on the application of low-nano zero-valent iron and nano-silver loading water purification carbon composite materials. This embodiment mainly uses low-concentration Pb in drinking water 2+ and Cd 2+ As the research object, the adsorption performance of the composite material was studied in a constant temperature oscillator by static adsorption test. The experimental condition is C 0 =100ppb, the amount of composite material added is 1.0g / L, the pH value of the solution is 6.0, and the ionic strength is C NaNO3 =0.01M.

[0079] like Figure 10 and Figure 11 As shown, among them, Figure 10 Composite material and former activated carbon that are prepared for embodiment 1 and embodiment 2 are to Pb 2+ The removal efficiency comparison chart, Figure 11 For the composite material and former activated carbon obtained in embodiment 1 and embodiment 2 to Cd 2 + Comparison chart of removal efficiency. From Figure 10 and Fi...

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Abstract

The invention relates to a preparation method of a water purification carbon composite material with low nano zero-valent iron and nano-silver loading capacities. The water purification carbon composite material with the low nano zero-valent iron and nano-silver loading capacities, which is prepared by the preparation method, has a high specific surface area; the loading capacity of iron and the loading capacity of silver in the composite material are low; the particle size of nano zero-valent iron and the particle size of nano silver are both smaller than 20nm; the water purification carbon composite material can adsorb, convert or degrade various pollutants in drinking water at the same time; the release amount of iron and silver is extremely low; and the water purification carbon composite material is a water purification material with extremely high application values.

Description

technical field [0001] The invention relates to the field of water purification materials, in particular to a method for preparing a water purification carbon composite material with low nanometer zero-valent iron and nanometer silver loading. Background technique [0002] Water purification carbon is widely used as one of the important filter materials for terminal water purification. Because of its huge specific surface area and surface chemical and biocompatibility, it has adsorption and removal effects on various pollutants in water. But at the same time, it is found that the surface is easy to grow microbial film and the secondary pollution after chemical pollutant saturation seriously restricts the effect and safety of its use. Furthermore, the regeneration of water purification charcoal after adsorbing pollutants is difficult and costly, which limits its regeneration and increases the cost of filter element materials. [0003] Loading modification of water purificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32C02F1/28C02F1/50C02F101/20
CPCB01J20/0229B01J20/0233B01J20/20B01J20/3204C02F1/281C02F1/50C02F2101/20
Inventor 汪印刘学蛟翟世辉
Owner KETAN XIAMEN NEW CARBON MATERIAL CO LTD
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