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Method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application

A nano-zero-valent iron, green synthesis technology, applied in nanotechnology, chemical instruments and methods, water pollutants, etc., can solve the problems of high equipment requirements, easy to be oxidized, complicated process, etc., and achieve difficult agglomeration and good stability , the effect of large specific surface area

Inactive Publication Date: 2016-12-07
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for the preparation of green synthetic nano-iron particles in view of the deficiencies in the prior art, so as to overcome the high cost of traditional nano-iron particles, high equipment requirements, complex processes, high energy consumption, and the use of toxic and flammable materials. Chemical reagents, easy to agglomerate, easy to be oxidized and other defects

Method used

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  • Method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application
  • Method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application
  • Method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application

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Experimental program
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Effect test

Embodiment 1

[0036] The preparation method of the nano-iron particle of green synthesis, comprises the steps:

[0037] 1) Weigh 60g of dried water hyacinth stem and leaf powder, place in 1L of deionized water, and extract in a water bath at 80°C;

[0038] 2) The extracted extract was vacuum filtered, centrifuged at 12000 rpm, passed through a 0.45 μm filter membrane, and the filtrate was refrigerated at 4°C in a refrigerator;

[0039] 3) Take 100ml water hyacinth stem and leaf extract and 50ml of 0.15moL / L FeCl 3 The solution is mixed and reacted under the protection of protective gas argon at a volume ratio of 2:1, and the color of the solution turns black under stirring, and a solution containing green synthesized nano-iron is obtained;

[0040] 4) Centrifuge the generated material at 12,000 rpm, wash the centrifuged material twice with acetone and ethanol, and dry at 50° C. in a vacuum oven to obtain a brown-black solid, which is green synthesized nano-zero-valent iron particles.

[0...

Embodiment 2

[0043] The preparation method of the green-synthesized nano-iron particles of green-synthesized nano-zero-valent iron comprises the following steps:

[0044] 1) Weigh 80g of dried water hyacinth stem and leaf powder, place in 1L deionized water, and extract in a water bath at 60°C;

[0045] 2) Vacuum filter the extracted extract, centrifuge at 10,000 rpm, pass through a 0.45 μm filter membrane, and store the filtrate in a refrigerator at 4°C;

[0046] 3) Take 100ml of water hyacinth stem and leaf extract and 100ml of 0.10moL / L Fe(NO 3 ) 3 The solution is mixed and reacted under the protection of protective gas neon at a volume ratio of 1:1, and the color of the solution turns yellow-green to black under stirring, and a solution containing green-synthesized nano-zero-valent iron is obtained;

[0047] 4) Centrifuge the generated material at 16000 rpm, wash the centrifuged material twice with acetone and ethanol, and dry at 60° C. in a vacuum oven to obtain a brown-black solid,...

Embodiment 3

[0050] The preparation method of the green-synthesized nano-iron particles of green-synthesized nano-zero-valent iron comprises the following steps:

[0051] 1) Weigh 70g of dried water hyacinth stem and leaf powder, place in 1L deionized water, and extract in a water bath at 70°C for 60min;

[0052] 2) vacuum filter the extracted extract, centrifuge at 11,000 rpm, pass through a 0.45 μm filter membrane, and store the filtrate in a refrigerator at 4°C;

[0053] 3) Take 150ml water hyacinth stem and leaf extract and 50ml of 0.10moL / L FeSO 4 The solution is mixed and reacted under the protection of nitrogen with a volume ratio of 3:1, and the color of the solution turns yellow-green into black under stirring, and a solution containing green-synthesized nano-zero-valent iron is obtained;

[0054] 4) Centrifuge the generated material at 16000 rpm, wash the centrifuged material twice with acetone and ethanol, and dry at 60° C. in a vacuum oven to obtain a brown-black solid, which ...

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Abstract

The invention discloses a preparing method for green synthesis of nanoscale zero-valent iron through water hyacinth extraction liquid and application. Water hyacinth stem and leaf extraction liquid serves as a reduction agent to reduce iron ions or ferrous ions to the zero-valent iron, a chromium pollution water green repairing material-green synthesis nanoscale zero-valent iron particles are obtained through preparing. The synthesis method is low in synthesis cost, small in energy consumption, simple in process, and free of a special device, the used reduction agent is the water hyacinth stem and leaf extraction liquid, wastes are utilized, and the synthesized particles are easily agglomerated and have the beneficial effects of being good in flowability, large in specific surface area, high in stability and the like. The repairing material prepared through the method is suitable for repairing the chromium pollution water and is high in repairing efficiency.

Description

technical field [0001] The invention belongs to the technical fields of nanomaterial preparation and environmental pollution control and repair, and in particular relates to a green repair material for water bodies polluted by heavy metal chromium-a method and application of green synthesis of nanometer zero-valent iron by using water hyacinth extract. Background technique [0002] Chromium compound is one of the main series products of inorganic chemical industry, widely used in chemical industry, light industry, metallurgy, textile, machinery and other industries. With the discharge of a large amount of chromium-containing wastewater, Cr(VI) has become one of the most important heavy metal pollutants in the world. In the "Twelfth Five-Year Plan for Prevention and Control of Heavy Metal Pollution" promulgated by the state in 2011, chromium was also listed as the first type of key prevention and control object in the next five years. Because Cr(VI) is easy to migrate in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00C02F1/70C02F101/22
CPCB82Y40/00C02F1/705B22F9/24C02F2101/22B22F2999/00B22F1/054B22F2201/02B22F2201/10
Inventor 方战强魏玉芬
Owner SOUTH CHINA NORMAL UNIVERSITY
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