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Composite material of nano zero-valent iron and silver metal cluster loaded on activated carbon and preparation method of composite material

A technology of nano-zero-valent iron and composite materials, which is applied in chemical instruments and methods, other chemical processes, special treatment targets, etc., can solve the problems of inability to use advanced treatment of drinking water, loss of functional metal particles, high cost of wastewater treatment, etc., to achieve Effect of high social and economic value, low ash content and low cost

Inactive Publication Date: 2017-07-18
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with activated carbon, biochar has the problems of low specific surface area, low strength, high ash content, and the possible loss of functional metal particles in practical applications, and the iron loaded on biochar after alkali washing is easy to lose, which is harmful to the human body when it enters the aqueous solution. , can not be used for advanced treatment of drinking water, so the application range of this composite material is limited to large-scale domestic wastewater treatment, its demand is large, and using silver as another functional metal, the cost of wastewater treatment is very high

Method used

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  • Composite material of nano zero-valent iron and silver metal cluster loaded on activated carbon and preparation method of composite material
  • Composite material of nano zero-valent iron and silver metal cluster loaded on activated carbon and preparation method of composite material
  • Composite material of nano zero-valent iron and silver metal cluster loaded on activated carbon and preparation method of composite material

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Embodiment 1

[0048] The preparation of the composite material of activated carbon loaded with nanometer zero-valent iron and silver metal clusters comprises the following steps: a) screening the activated carbon of 1.0-1.5 mm, washing and drying with deionized water, adding it to 5% hydrochloric acid and soaking it for 24 hours, Wash with deionized water until the pH remains constant, and then dry; b) Weigh FeSO 2 according to the mass ratio of iron to activated carbon of 1:10 4 ·7H 2 0, adding 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent and 0.2g of polyethylene glycol, the stirrer speed is 350r / min, the reaction time is 30min, room temperature, feed N 2 c) Add 2g of activated carbon to the solution described in step b), stir for 120min, slowly add 100mL of 0.15mol / L NaBH 4 solution, the rotation speed is 450r / min, and N 2 , to be NaBH 4 The solution is added and reacted until no bubbles are generated. The reaction equation is: Fe 2+ (aq)+2BH 4 - (aq)+6H ...

Embodiment 2

[0054] The preparation of the composite material of activated carbon loaded with nanometer zero-valent iron and silver metal clusters comprises the following steps: a) screening the activated carbon of 1.0-1.5 mm, washing and drying with deionized water, adding it to 5% hydrochloric acid and soaking it for 24 hours, Wash with deionized water until the pH remains constant, and then dry; b) Weigh FeSO 2 according to the mass ratio of iron to activated carbon of 1:10 4 ·7H 2 0, adding 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent and 0.2g of polyethylene glycol, the stirrer speed is 350r / min, the reaction time is 120min, room temperature, feed N 2 c) Add 2g of activated carbon to the solution described in step b), stir for 120min, slowly add 100mL of 0.15mol / L NaBH 4 solution, the rotation speed is 450r / min, and N 2 , to be NaBH 4 The solution is added and reacted until no bubbles are generated. The reaction equation is: Fe 2+ (aq)+2BH 4 - (aq)+6H...

Embodiment 3

[0060] The preparation of the composite material of activated carbon loaded with nanometer zero-valent iron and silver metal clusters comprises the following steps: a) screening the activated carbon of 1.0-1.5 mm, washing and drying with deionized water, adding it to 5% hydrochloric acid and soaking it for 24 hours, Wash with deionized water until the pH remains constant, and then dry; b) Weigh the FeSO 2 according to the mass ratio of iron to activated carbon of 1:5 4 ·7H 2 0, adding 100mL volume ratio of ultrapure water and absolute ethanol mixed solvent and 0.2g of polyethylene glycol, the stirrer speed is 350r / min, the reaction time is 120min, room temperature, feed N 2 c) Add 2g of activated carbon to the solution described in step b), stir for 120min, slowly add 100mL of 0.15mol / L NaBH 4 solution, the rotation speed is 450r / min, and N 2 , to be NaBH 4 The solution is added and reacted until no bubbles are generated. The reaction equation is: Fe 2+ (aq)+2BH 4 - (aq)...

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Abstract

The invention relates to a composite material of nano zero-valent iron and a silver metal cluster loaded on activated carbon and a preparation method of the composite material. The method comprises the steps of firstly carrying out acidifying treatment on the activated carbon, cleaning and drying; secondly, adding polyethylene glycol to a mixed ferrous sulfate solution employing ethanol and water as mixed solvents, dissolving, adding NaOH to adjust the pH value; adding acidified activated carbon to the mixed solution, fully stirring and then adding a sodium borohydride solution to obtain nano zero-valent iron-loaded activated carbon; and finally washing the nano zero-valent iron-loaded activated carbon, and adding the nano zero-valent iron-loaded activated carbon to a silver salt solution as quickly as possible and reacting to obtain the material. The preparation method is simple in process, and simple in operation; and in a practical water purification application, various pollutants in drinking water are efficiently converted and degraded by combining the strong adsorption ability of the activated carbon and a micro-galvanic cell formed between iron and silver nanoparticles.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a composite material of activated carbon loaded with nanometer zero-valent iron and silver metal clusters and a preparation method thereof. Background technique [0002] With the rapid development of society and economy, the problem of environmental pollution has become increasingly prominent. Among them, excessive heavy metals in drinking water caused by source water pollution, urban tap water pipeline network pollution, secondary water supply pollution, and terminal pollution (tap water pollution) pose a serious threat to residents' drinking water safety. Heavy metal ions including Pb 2+ 、Cd 2+ 、Cu 2+ , Zn 2+ , Mn 2+ 、As 3+ etc. Exceeding the standard will have a serious impact on the health of residents. At the tap water terminal, the drinking water is deeply purified by combining other technologies with water purification activated carbon. Using the large specific s...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/02B01J20/20B01J2220/42C02F1/281C02F2101/20C02F2303/04C02F2303/18C02F2303/20
Inventor 汪印刘学蛟邢贞娇潘蓓蓓
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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