Method for preparing biochar nanometer zero-valent iron-nickel composite in one step

A nano-zero-valent iron and biochar technology is applied in the field of biomass green conversion and utilization and environmental protection, which can solve the problems of complex process and large environmental footprint, and achieve the advantages of simple synthesis process, enhanced reduction effect, and good physical and chemical combination. Effect

Active Publication Date: 2021-04-02
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is still complex and has a large environmental footprint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. Preparation of nano-zero-valent iron-nickel composites of masson pine biochar.

[0026] (1) After the masson pine raw material is air-dried, it is crushed to a particle size of 0.2mm-25mm, and is used for later use. The masson pine raw material is made of cheap and readily available pine wood processing waste.

[0027] (2) Dissolve excess ferric chloride and nickel chloride in soft water to prepare ferric chloride saturated solution and nickel chloride saturated solution respectively.

[0028] (3) Get the masson pine pellets, ferric chloride saturated solution, nickel chloride saturated solution and fully mix by the ratio of 100 parts of masson pine pellets, 60 parts of ferric chloride saturated solution, and 30 parts of nickel chloride saturated solution, After absorbing and diffusing evenly, dry it in a hot air dryer at 60°C for later use.

[0029] (4) Preparation of masson pine biochar nano-zero-valent iron-nickel composite crude product: take masson pin...

Embodiment 2

[0032] Example 2. Preparation of nano-zero-valent iron-nickel composites of Chinese fir biochar.

[0033] (1) Preparation of Chinese fir pellets: After drying, the Chinese fir raw materials are crushed to a particle size of 0.3mm-20mm for later use. The Chinese fir raw materials are made of cheap and readily available Chinese fir processing waste.

[0034] (2) Preparation of iron / nickel salt saturated solution: Take excess ferrous sulfate and nickel nitrate and dissolve them in soft water to prepare ferrous sulfate saturated solution and nickel nitrate saturated solution respectively.

[0035] (3) Preparation of Chinese fir pellets for absorbing iron / nickel salts: Take Chinese fir pellets, saturated solution of ferrous sulfate, saturated solution of nickel nitrate by 100 parts of Chinese fir pellets, 70 parts of saturated solution of ferrous sulfate, and 25 parts of saturated solution of nickel nitrate The ratio is fully mixed, after the absorption and diffusion are uniform, ...

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Abstract

The invention discloses a method for preparing a charcoal nanometer zero-valent iron-nickel compound with a one-step method. The method comprises the following steps of after adsorbing water-soluble iron salt and water-soluble nickel salt with ligneous biomass, performing heating pyrolysis by virtue of microwaves under the anaerobic condition; and reducing iron ions and nickel ions into zero-valent iron and zero-valent nickel by taking pyrolysis gas in the pyrolysis process as a reducing agent, adsorbing zero-valent iron ultrafine particles and zero-valent nickel ultrafine particles in situ bytaking charcoal produced in the pyrolysis process as a porous adsorption carrier, and synthesizing the charcoal nanometer zero-valent iron-nickel compound with the one-step method and low cost. The ligneous charcoal zero-valent iron-nickel compound provided by the invention has very strong adsorption performance and the ability of reducing and degrading organic dyes, organic chloride, bisphenol Aand antibiotics, has obvious adsorption and passivation effect to heavy metals and can provide an effective repair material to removal of organic dye residues, organic chloride residues, bisphenol Aresidues and antibiotic residues which are difficultly degraded in water body and soil and passivation of the heavy metal pollutants which are difficultly degraded in the water body and soil.

Description

technical field [0001] The invention belongs to the technical field of biomass green conversion utilization and environmental protection, and relates to a method for preparing biochar nanometer zero-valent iron and nickel composite. Background technique [0002] In the early 1980s, the residues of organic pollutants such as organic dyes, chlorinated hydrocarbons, and aromatic hydrocarbons received global attention. Some researchers have found that the use of zero-valent metals such as magnesium, copper, and iron has great advantages in the removal of refractory organic pollutants in groundwater. Compared with other zero-valent metals, the preparation process of zero-valent iron is simple, the reaction is complete and does not cause secondary pollution to the environment, and because it is cheap and easy to obtain, it has received extensive attention in engineering applications. [0003] However, the synthesis process of zero-valent iron is relatively backward, and there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/32C02F1/28C02F1/70B09C1/00B09C1/08C02F101/20C02F101/30C02F101/34C02F101/36C02F103/06
CPCB01J20/20B01J20/3214B01J20/3234B09C1/00B09C1/08C02F1/283C02F1/705C02F2101/20C02F2101/308C02F2101/345C02F2101/36C02F2103/06
Inventor 刘玉环赵云峰王允圃郑洪立巫小丹彭红刘童莹阮榕生
Owner NANCHANG UNIV
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