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Wood biochar material capable of adsorbing heavy metals and preparation method thereof

A technology for adsorbing heavy metals and woody organisms, which is applied in the direction of alkali metal compounds, alkali metal oxides/hydroxides, chemical instruments and methods, etc., can solve the problems of difficult recycling, small specific surface area, and low adsorption efficiency, and achieve the goal of preparing Reasonable process design, simple operation, and the effect of eliminating low porosity

Inactive Publication Date: 2018-12-07
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of low porosity, small specific surface area, low adsorption efficiency and difficult recycling of biochar materials prepared in the prior art, the present invention provides a woody biochar material that adsorbs heavy metals and a preparation method thereof

Method used

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  • Wood biochar material capable of adsorbing heavy metals and preparation method thereof
  • Wood biochar material capable of adsorbing heavy metals and preparation method thereof

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Effect test

Embodiment 1

[0030] A woody biochar material that adsorbs heavy metals and its preparation method. Firstly, woody biomass raw materials are selected, and then the biomass raw materials are physically and chemically treated to obtain biomass nanofiber aerogels, which are then placed in a protective gas for high-temperature pyrolysis. , and finally through alkali high-temperature activation, the porous biochar fiber airgel material is prepared;

[0031] A preparation method of a woody biochar material adsorbing heavy metals comprises the following steps:

[0032] Step 1. After the collected woody biomass raw material is naturally air-dried, impurities such as sediment are cleaned, and then pulverized by a pulverizer, and finally passed through a 50-mesh sieve to obtain woody biomass powder;

[0033] Step 2, chemically extracting the obtained woody biomass powder until the biomass powder gradually turns white; then performing acid treatment and alkali treatment, and finally obtaining bleached...

Embodiment 2

[0044] A woody biochar material that adsorbs heavy metals and its preparation method. Firstly, woody biomass raw materials are selected, and then the biomass raw materials are physically and chemically treated to obtain biomass nanofiber aerogels, which are then placed in a protective gas for high-temperature pyrolysis. , and finally through alkali high-temperature activation, the porous biochar fiber airgel material is prepared;

[0045] A preparation method of a woody biochar material adsorbing heavy metals comprises the following steps:

[0046] Step 1, after drying the collected woody biomass raw materials with cold air, cleaning up impurities such as sediment, and then crushing them through a pulverizer, and finally passing through a 100-mesh sieve to obtain woody biomass powder;

[0047] Step 2, chemically extracting the obtained woody biomass powder until the biomass powder gradually turns white; then performing acid treatment and alkali treatment, and finally obtaining...

Embodiment 3

[0058] A woody biochar material that adsorbs heavy metals and its preparation method. Firstly, woody biomass raw materials are selected, and then the biomass raw materials are physically and chemically treated to obtain biomass nanofiber aerogels, which are then placed in a protective gas for high-temperature pyrolysis. , and finally through alkali high-temperature activation, the porous biochar fiber airgel material is prepared;

[0059] A preparation method of a woody biochar material adsorbing heavy metals comprises the following steps:

[0060] Step 1. After the collected woody biomass raw materials are naturally air-dried, impurities such as sediment are cleaned, and then pulverized by a pulverizer, and finally woody biomass powder is obtained by passing through an 80-mesh sieve;

[0061] Step 2, chemically extracting the obtained woody biomass powder until the biomass powder gradually turns white; then performing acid treatment and alkali treatment, and finally obtaining...

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Abstract

The invention discloses a wood biochar material capable of adsorbing heavy metals and a preparation method thereof. The preparation method comprises the following steps: selecting a wood biomass raw material; subjecting the biomass raw material to physical and chemical treatment so as to obtain a biomass nanofiber aerogel; then placing the biomass nanofiber aerogel in a shielding gas for high-temperature pyrolysis; and finally performing alkaline high-temperature activation so as to prepare the porous biochar fiber aerogel material. The preparation method of the invention is reasonable in process design and simple to operate; and a prepared biochar fiber aerogel is of a three-dimensional porous structure which not only improves adsorption efficiency but also prolongs the service life of the recycled biochar material.

Description

technical field [0001] The invention relates to the field of biochar materials, in particular to a woody biochar material that absorbs heavy metals and a preparation method thereof. Background technique [0002] Traditional methods of remediation of heavy metals in soil include physical remediation, chemical remediation, phytoremediation, etc. Heavy metal treatment methods in polluted water sources include chemical reduction, precipitation, ion exchange, solvent extraction, chelation, membrane filtration However, these methods are not only difficult to operate, but also have high operating costs and low economic efficiency. In addition, the effect is not obvious for outdoor soil or water bodies with low concentrations of heavy metals, it is difficult to put into practical use, and it is easy to produce sediment and toxic compounds to cause secondary environmental pollution. [0003] Biochar is a stable carbon-rich solidified product formed by high-temperature pyrolysis and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28047
Inventor 文阳平盛盈盈时红魏超邓浪黄鹏杨秀霞
Owner JIANGXI AGRICULTURAL UNIVERSITY
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