Modified magnetic biochar adsorbing material and application thereof

A technology for adsorption materials and biomass materials, applied in the field of modified magnetic biochar adsorption materials and adsorption materials, can solve the problems of difficulty in recycling, affecting surface complexation, etc., to reduce the damage to the ecological environment, low cost, and preparation method. Simple and easy effects

Active Publication Date: 2015-01-07
UNIV OF JINAN
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  • Abstract
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  • Claims
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Problems solved by technology

However, the recovery of biochar after adsorbing pollutants has been a difficult problem
The advent of magnetic biochar has improved the problem of secondary pollution caused by it in recycling. However, since the adsorption mechanism of biochar for heavy metals is mainly the complexation and co-precipitation of the surface of biochar and heavy metals, the modified biochar The surface and pores of the carbon are filled and covered by magnetic materials, which blocks the contact between the surface of the biochar and the heavy metal ions in the aqueous solution, thereby affecting its surface complexation and co-precipitation

Method used

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  • Modified magnetic biochar adsorbing material and application thereof
  • Modified magnetic biochar adsorbing material and application thereof
  • Modified magnetic biochar adsorbing material and application thereof

Examples

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Embodiment 1

[0027] A modified magnetic biochar adsorption material is prepared by the following steps: Weigh 40 g FeCl 3 .6H 2 O was dissolved in 60ml deionized water to prepare FeCl 3 Aqueous solution, add 10g of corn stalks passed through a 2mm sieve into it, stir evenly, place at 80°C for 2h to attach magnetism; put the magnetized biomass in a crucible, seal it with aluminum foil and place it in a muffle furnace at a rate of 10°C / min Raise the temperature to 700°C, keep the constant temperature for 3 hours, cool to room temperature, grind, pass through a 0.7mm sieve to obtain magnetic biochar; dissolve 3g of chitosan in 100ml of acetic acid solution (2%), after fully dissolved, 3g of magnetic biochar Biochar was added to the solution, stirred evenly, added dropwise to 900ml NaOH (1.2%) aqueous solution, left to stand, filtered, the solid was taken, rinsed with deionized water for 5 times, and dried to obtain the modified magnetic biochar adsorbent.

[0028] The specific surface area...

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Abstract

The invention discloses a modified magnetic biochar adsorbing material and application thereof. The adsorbing material is prepared through the following steps: taking agricultural waste corn stalks as a raw material, magnetizing and carbonizing the raw material, and adhering chitosan coating to the surface of the raw material. The adsorbing material is wide in raw material source, stable in structure, low in possibility of blocking, high in efficiency of effectively removing typical heavy metal pollutants namely cadmium ions and copper ions in water, convenient to separate, recycle and reuse and free of secondary pollution, achieves resource utilization, and has good environmental benefits and economic benefits.

Description

technical field [0001] The invention relates to an adsorption material, in particular to a modified magnetic biochar adsorption material and application thereof, and belongs to the fields of resource utilization of agricultural waste and pollution control of heavy metal polluted water bodies. Background technique [0002] Due to the massive discharge of cadmium and copper-containing wastewater in the process of industrial and agricultural production, the content of heavy metals in the water environment is increasing day by day, which seriously threatens the survival of human beings. Therefore, the removal of typical heavy metal pollutants in the water environment has become the focus of my country's water pollution prevention and control. focus. [0003] As an emerging adsorption material, biochar has attracted more and more attention because of its wide source of raw materials, simple and feasible preparation method, and high adsorption capacity. However, the recovery of bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/24B01J20/28009B01J20/28059C02F1/288
Inventor 杨宝山许世鹏王惠
Owner UNIV OF JINAN
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