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Biological charcoal loaded with iron/zinc nano-particles as well as preparation method and application thereof

A technology of nano-particles and biochar, applied in the field of materials, can solve the problems of small particle size of biochar, difficult to recycle, secondary pollution, etc., and achieve the effect of strong adsorption capacity, low cost and easy separation

Active Publication Date: 2016-10-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of biochar is very small, it is difficult to recycle, and it may cause secondary pollution, which limits its application to a certain extent.

Method used

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  • Biological charcoal loaded with iron/zinc nano-particles as well as preparation method and application thereof
  • Biological charcoal loaded with iron/zinc nano-particles as well as preparation method and application thereof
  • Biological charcoal loaded with iron/zinc nano-particles as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of biochar of loaded iron / zinc nanoparticle, comprises biochar, and the iron nanoparticle and zinc nanoparticle loaded on the biochar, the mass percent of described iron nanoparticle is 0.9%, the mass percent of zinc nanoparticle is 0.68 %, the specific surface area of ​​the biochar loaded with iron / zinc nanoparticles is 518 m 2 / g, the iron nanoparticles are ferric oxide nanoparticles and ferric oxide nanoparticles, and the zinc nanoparticles are zinc oxide nanoparticles.

[0042] A preparation method of biochar loaded with iron / zinc nanoparticles of the above-mentioned present embodiment, specifically comprising the following steps:

[0043] (1) Sawdust pretreatment: After crushing the dry thin strips of wood chips in a pulverizer, they pass through a 100-mesh sieve to obtain fine powder wood chips, which are used as raw materials for preparing biochar.

[0044] (2) Impregnation of biochar loaded with Fe / Zn nanoparticles:

[0045] 2-1. Take 15g of fine powder...

Embodiment 2

[0060] A kind of biochar loaded with iron / zinc nanoparticles, including biochar, and iron nanoparticles and zinc nanoparticles loaded on the biochar, the mass percentage of the iron nanoparticles is 0.81%, and the mass percentage of the zinc nanoparticles is 0.52 %, the specific surface area of ​​the biochar loaded with iron / zinc nanoparticles is 495 m 2 / g, the pore volume of the biochar loaded with iron / zinc nanoparticles is 0.0661 cm 3 / g, the iron nanoparticles are ferric oxide nanoparticles and ferric oxide nanoparticles, and the zinc nanoparticles are zinc oxide nanoparticles.

[0061] A preparation method of biochar loaded with iron / zinc nanoparticles of the above-mentioned present embodiment, specifically comprising the following steps:

[0062] (1) Sawdust pretreatment: After crushing the dry thin strips of wood chips in a pulverizer, they pass through a 100-mesh sieve to obtain fine powder wood chips, which are used as raw materials for preparing biochar.

[0063] ...

Embodiment 3

[0068] An application of the biochar loaded with iron / zinc nanoparticles prepared in Example 1 in the removal of p-nitrophenol in water, and the above-mentioned biochar loaded with iron / zinc nanoparticles is used for adsorption solution by different adsorption reaction times The ability of p-nitrophenol in the medium, concrete steps are as follows:

[0069] (1) Prepare 10 groups of 15 mL p-nitrophenol solutions with a concentration of 150 mg / L, add 15 mg of the biochar loaded with iron / zinc nanoparticles in Example 1, and set the temperature at 25 °C, pH 3, and 150 rpm Under the condition of vibration adsorption. And at 10 min, 40 min, 150 min, 390 min, 820 min, 1510 min, 1810 min, 2170 min and 2890 min after the reaction started, it was magnetically separated, and then the remaining p-nitrate in the solution was measured by an ultraviolet spectrophotometer The content of p-nitrophenol was calculated, and the adsorption amount of p-nitrophenol by the biochar loaded with iron / ...

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Abstract

The invention discloses biological charcoal loaded with iron / zinc nano-particles as well as a preparation method and application thereof. The biological charcoal loaded with the iron / zinc nano-particles comprises biological charcoal, iron nano-particles and zinc nano-particles; the iron nano-particles and the zinc nano-particles are loaded in the surface and micro-pores of the biological charcoal. The preparation method takes the biological charcoal as a carrier and the iron nano-particles and the zinc nano-particles are loaded on the biological charcoal through a front immersion method; the prepared biological charcoal loaded with the iron / zinc nano-particles has relatively good magnetism, more functional groups and relatively large specific surface area and pore volume, can be used for rapidly and effectively removing p-nitrophenol in a water body and has the advantages of great adsorption amount, strong adsorption capability, high adsorption efficiency, simplicity in operation and the like.

Description

technical field [0001] The present invention relates to the field of material technology, in particular to a biochar loaded with iron / zinc nanoparticles, and also relates to a preparation method of the aforementioned biochar loaded with iron / zinc nanoparticles and an application in removing p-nitrophenol from water. Background technique [0002] p-nitrophenol is a kind of nitroaromatic compound, which is widely used in agriculture, printing and dyeing, plastics and other industries. p-nitrophenol in wastewater has caused serious threats to the environment and human health. p-nitrophenol may be mutagenic, Harmful to the human liver and kidneys. At present, the methods for removing p-nitrophenol in water mainly include: adsorption, reduction, biodegradation, advanced oxidation technology, etc. Among them, the adsorption method is widely used because of its simple operation, low cost, mature process, safe treatment process and high treatment efficiency. [0003] Biochar is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38C02F101/34
CPCB01J20/06B01J20/20B01J20/28009C02F1/288C02F2101/34C02F2101/38
Inventor 汤琳王佩魏雪周耀渝曾光明邓垚成王敬敬谢志红方伟
Owner HUNAN UNIV
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