A kind of floating nano zero-valent iron material and preparation method thereof

A nano-zero-valent iron and biomass material technology, applied in the field of nano-materials, can solve the problems of high energy consumption, influence of nano-material loading and reactivity performance, inability to suspend or float naturally, etc., to achieve easy recovery and avoid agglomeration The effect of growing up and inactivating

Active Publication Date: 2021-06-01
北京科大科技园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This process not only consumes a lot of energy, but also under the high temperature conditions, the functional groups of the walnut shell itself have been carbonized and decomposed, which affects its adsorption and loading effect, resulting in many properties such as the loading capacity and reactivity of the prepared nanomaterials being affected. Moreover, the specific gravity of walnut shells is much greater than that of water. Therefore, although such biomass raw materials can successfully load nano-zero-valent iron, they cannot naturally suspend or float when thrown in a water body.

Method used

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  • A kind of floating nano zero-valent iron material and preparation method thereof

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Effect test

Embodiment 1

[0039]Weigh the garlic waste, crush and sieve through 40 mesh, throw it into the water and stir, soak for 24 hours; collect the garlic waste particles floating on the water surface, add sodium hydroxide solution to adjust its pH value at 13, keep stirring After 12 hours, the particles floating on the water surface were collected; 10 liters of ferric chloride ion solution of 0.1M concentration was prepared, and 1000 grams of floatable garlic slag adsorbents (measured on a dry basis) were dropped into, and after stirring and reacting for 300 minutes, the After the adsorbent is filtered and washed 3 times with distilled water; the obtained adsorbent is put into a reaction kettle, and a sodium borohydride solution with a concentration of 0.1M is added until there are no more bubbles, and the stirring reaction is continued for 5 minutes. The loaded nano-zero-valent iron composite material is washed repeatedly with clean water for 2-3 times, then put into a plastic film bag, vacuumiz...

Embodiment 2

[0041] Weigh the garlic waste, crush and sieve through 80 mesh, throw it into water and stir, soak for 36 hours; collect the garlic waste particles floating on the water surface, add potassium hydroxide solution to adjust its pH value at 12.5, and keep stirring After 24 hours, the particles floating on the water surface were collected; 20 liters of ferric chloride ion solution of 0.2M concentration was prepared, and 500 grams of floatable garlic slag adsorbents (measured on a dry basis) were dropped into, and after stirring and reacting for 300 minutes, the After the adsorbent is filtered and washed 3 times with distilled water; the obtained adsorbent is put into a reaction kettle, and a sodium borohydride solution with a concentration of 0.2M is added until no more bubbles are generated, and the stirring reaction is continued for 5 minutes, and the above adsorbent is separated by filtration. The loaded nano-zero-valent iron composite material is repeatedly washed with clean wa...

Embodiment 3

[0043] Weigh mangosteen residue waste, crush and sieve through 80 meshes, throw into an alkaline aqueous solution with a pH value of 12.5, stir and soak for 36 hours; collect the particles suspended in the liquid surface or even 5 cm below the liquid surface; prepare 20 liters of ferric chloride ion solution of 0.15M concentration, drop into 2000 grams (dry basis measurement) of the mangosteen slag adsorbent collected above, after stirring and reacting for 180 minutes, adsorbent is filtered, after washing 3 times with distilled water; Gained adsorbent Put it into the reaction kettle, add a sodium borohydride solution with a concentration of 0.05M until no more bubbles appear, continue to stir and react for 5 minutes, filter and separate the above suction-loaded nano-zero-valent iron composite material, and wash it repeatedly with clean water for 2 After -3 times, put it into a plastic film bag, vacuumize it, and seal it in plastic to obtain a floating nanometer zero-valent iron...

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Abstract

The invention relates to nanometer materials, and specifically discloses a floating nanometer zero-valent iron material and a preparation method thereof. The floatable nanometer zero-valent iron material of the present invention is prepared from biomass adsorption particles with suspending or buoyant properties through iron adsorption loading and in-situ rapid reduction process; wherein, the preparation method of the biomass adsorption particles is as follows: : Breaking the biomass material, passing through a 40‑100 mesh sieve to obtain powder particles, stirring in water, wetting, standing still, collecting the floating particles to obtain biomass adsorption particles. The floatable nanometer zero-valent iron material provided by the present invention can be thrown in the polluted water body in a suspended or floating state, without settling to the bottom of the water body, thereby maintaining a more sufficient contact with the water body and a more continuous reaction, which is expected Obtain unique application effects in some special water purification.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a floating nanometer zero-valent iron material and a preparation method thereof. Background technique [0002] Nano-zero-valent iron has a small particle size and high surface activity. As a safe, efficient and environmentally friendly reductive environmental purification material, it has been widely concerned and applied since it was first invented by Zhang Weixian in 1997. Especially in the in-situ purification of groundwater, the in-situ purification of surface polluted water, the purification of metallurgical industrial wastewater and the extraction of metal resources, the restoration and treatment of heavy metals in soil, the reduction and degradation of residual pesticides in water and soil environments, etc., have been applied and implemented. , has achieved good results, and is a new type of environmental material with very promising application prospects. [0003] When reducing an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/70
CPCC02F1/705
Inventor 黄凯
Owner 北京科大科技园有限公司
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