Method for preparing charcoal nanometer zero-valent iron compound with one-step method

A technology of nano-zero-valent iron and biochar, which is applied in the fields of green conversion and utilization of biomass and environmental protection, can solve the problems of large environmental footprint and complex process, and achieve the effect of small environmental footprint, simple synthesis process and improved ability

Inactive Publication Date: 2018-11-23
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

[0022] Example 1. Preparation of bamboo charcoal nano-zero valent iron composite.

[0023] (1) After the bamboo processing waste is naturally air-dried, use a hammer mill to crush it to a particle size of about 10mm, and set it aside.

[0024] (2) Weigh excess ferrous sulfate and mix it with soft water, fully stir at room temperature, so that the ferrous sulfate in the solution reaches the dissolved saturation state, and become a saturated solution of ferrous sulfate, and set aside.

[0025] (3) Take 100 parts of moso bamboo pellets from step (1) and 55 parts of the saturated solution of ferrous sulfate in step (2), mix them well, and place them overnight so that the ferrous sulfate solution is fully absorbed by the moso bamboo pellets, and the ferrous sulfate is evenly diffused After entering the inside of the moso bamboo tissue structure, dry it in a hot air drying oven at 60°C for future use.

[0026] (4) Put the moso bamboo pellets adsorbed with ferrous sulfate in step (...

Embodiment 2

[0029] Example 2. Preparation of bagasse biochar nano-zero valent iron composites.

[0030] (1) Preparation of bagasse pellets: After the bagasse raw material is dried, it is crushed to a particle size of less than 3mm and set aside.

[0031] (2) Preparation of saturated solution of ferrous chloride: Weigh ferrous chloride and mix it with soft water, fully stir at room temperature, so that the ferrous chloride in the solution reaches a state of dissolved saturation, and set aside.

[0032] (3) Preparation of bagasse pellets for absorbing iron salts: Take 100 parts of bagasse pellets in step (1) and 65 parts of ferrous chloride saturated solution in step (2), mix them well, and let the ferrous chloride solution be covered with bagasse After being fully absorbed in the pellets, the ferrous chloride is evenly diffused into the tissue structure of the moso bamboo, and dried in a hot air drying oven at 70°C for later use.

[0033] (4) Put the bagasse pellets with ferrous chloride...

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Abstract

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

Claims

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Application Information

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Patent Type & Authority Applications(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 赵云峰刘玉环王允圃巫小丹郑洪立刘童莹彭红阮榕生
Owner NANCHANG UNIV
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