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Preparation method of green synthesis of nano zero-valent iron with extraction liquid of nephrolepis auriculata and application of the nano zero-valent iron

A technology of nano-zero-valent iron and green synthesis, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of easy particle aggregation, easy oxidation, complicated process, etc., and achieve simple extraction process, The effect of strong reducing ability and simple preparation process

Inactive Publication Date: 2018-05-15
广州润方环保科技股份有限公司
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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 green method for preparing nanometer zero-valent iron to overcome the high cost of the traditional nanometer iron particle synthesis method, requiring special equipment, complex processes, using toxic chemical reagents, and the synthesized particles are easy to agglomerate, easy to problems such as oxidation

Method used

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  • Preparation method of green synthesis of nano zero-valent iron with extraction liquid of nephrolepis auriculata and application of the nano zero-valent iron
  • Preparation method of green synthesis of nano zero-valent iron with extraction liquid of nephrolepis auriculata and application of the nano zero-valent iron
  • Preparation method of green synthesis of nano zero-valent iron with extraction liquid of nephrolepis auriculata and application of the nano zero-valent iron

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Effect test

Embodiment 1

[0030] The preparation method of kidney fern extract comprises the steps:

[0031] Weigh 3g, 4g, 5g, 6g, 7g, 8g of washed and dried fresh fern fern, place them in 100mL deionized water respectively, and extract in a water bath at 80°C for 80min;

[0032] The extracted extract was filtered under reduced pressure, passed through a 0.45 μm filter membrane, and the filtrate was refrigerated in a refrigerator at 4°C.

[0033] figure 1 The effect of solid-liquid ratio on the extraction effect of the prepared kidney fern extract in the extraction process.

[0034] Depend on figure 1 It can be seen that with the increase of the ratio of extracting liquid to liquid, the antioxidant capacity of the extract corresponding to the unit mass of Nephronia is weakened, and the antioxidant capacity changes the most when the mass of Nephronia is between 3 and 4g, so the ratio of solid to liquid is 3g: 100mL is the best extraction material-liquid ratio.

Embodiment 2

[0036] Green synthetic nano-iron particles Na-Fe-NPs (Nephrolepis auriculata (L.) Trimen in Latin name, Fe nanoparticles in English name of nano-iron, since this material is nano-iron particles synthesized by green fern extract, so the material Named as the preparation method of Na-Fe-NPs), comprises the steps:

[0037] 1) Weigh 3g of washed and dried fresh Nephron fern, put it in 100mL deionized water, and extract in a water bath at 80°C for 80min:

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

[0039] 3) Take 200mL kidney fern extract and 100mL of 0.10moL / L FeCl 3 The solution was mixed and reacted under the protection of nitrogen at a volume ratio of 2:1. The color of the solution changed from brown to black under stirring, and a solution containing green synthetic nano-iron particles was obtained. The generated material was centrifuged, and the ce...

Embodiment 3

[0042] The preparation method of the nano-iron particle Na-Fe-NPs of green synthesis, comprises the steps:

[0043] 1) Weigh 3g of washed and dried fresh Nephron fern, put it in 100mL deionized water, and extract in a water bath at 80°C for 80min:

[0044] 2) The extracted extract was filtered under reduced pressure, centrifuged at 9300 rpm, passed through a 0.45 μm filter membrane, and the filtrate was refrigerated at 4°C in a refrigerator;

[0045] 3) Take 100mL kidney fern extract and 50mL of 0.10moL / L FeCl 3 The solution was mixed and reacted under the protection of nitrogen at a volume ratio of 2:1. The color of the solution changed from brown to black under stirring, and a solution containing green synthetic nano-iron particles was obtained. The generated material was centrifuged, and the centrifuged material was washed, After drying, a brown-black solid is obtained, that is, green synthetic nano-zero-valent iron.

[0046] The EDS image of the resulting nanometer zero ...

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Abstract

The invention relates to the technical field of preparation of functional materials and restoration of polluted water body in environmental engineering, and especially provides a preparation method ofgreen synthesis of nano zero-valent iron with extraction liquid of nephrolepis auriculata. The method includes the steps of: 1) preparing the extraction liquid of nephrolepis auriculata from nephrolepis auriculata; 2) performing a reaction to the extraction liquid of nephrolepis auriculata with a ferric salt solution or a ferrous salt solution to prepare the green-synthesized nano zero-valent iron. The method is low in cost and simple in extraction process, wherein the extraction liquid has strong reduction capability. The method is simple in process and convenient to carry out, is low in energy consumption and is free of secondary pollution. The nano zero-valent iron has high chromium removal capability. The invention also provides an application of the green-synthesized nano zero-valentiron.

Description

technical field [0001] The invention relates to the technical field of preparation of functional materials in environmental engineering and restoration of polluted water bodies, in particular to a preparation method and application of green synthesis of nanometer zero-valent iron by using the fern fern extract liquid. Background technique [0002] Chromium pollution mainly comes from chrome ore, metal smelting, electroplating, tanning and other industrial wastewater, waste gas and waste residue. Chromium is one of the essential trace elements for the human body, but excessive chromium is harmful to human health; hexavalent chromium is more toxic, more absorbed by the human body, has carcinogenic effects, and can accumulate in the body. Due to the wide application of chromium in industrial production, the amount of hexavalent chromium in the environment is gradually increasing, which will cause potential harm and threat to human and animal bodies. Therefore, developing and op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/22
CPCC02F1/705C02F2101/22
Inventor 方战强肖诗华涂国权
Owner 广州润方环保科技股份有限公司
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