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Preparation method of biological carbon adsorbent for repairing organic pollution

A technology of organic pollution and biological carbon, applied in the restoration of polluted soil, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as low energy efficiency, adverse greenhouse gas and atmospheric environmental quality control, etc. Emissions, the effect of increasing the yield of bio-carbon

Inactive Publication Date: 2014-11-12
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] my country's agricultural waste biomass resources are very rich, and a large amount of biomass, mainly crop stalks, has low energy efficiency as a household energy source, and is not conducive to the control of greenhouse gases and atmospheric environmental quality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The corn stalk residue is simply crushed into particles of about 5mm, and the stalk particles are placed in a reactor, and carbonized for 1 hour at 500°C and nitrogen flow (1 volume of reactor nitrogen gas per minute), and the biochar yield is 31 %, its dissolved organic carbon content is 2.4g / kg; it is washed three times with deionized water at a solid-to-liquid ratio of 1:50, and the biochar adsorbent is BC-1.

Embodiment 2

[0027] After the bagasse residue is air-dried, the residue is simply shredded to particles smaller than 5mm, and the bagasse particles are placed in a reactor, and carbonized for 1 hour at 500°C and nitrogen flow (1 volume of reactor nitrogen gas per minute). The yield of biochar is 27%, and its dissolved organic carbon content is as high as 2.2g / kg; it is washed three times with deionized water at a solid-to-liquid ratio of 1:50, and the biochar adsorbent is BC-2.

Embodiment 3

[0029] The sawdust is air-dried and directly placed in the reactor, carbonized for 2 hours at 500°C and nitrogen flow (2 volumes of reactor nitrogen per minute), the biochar yield is 24%, and the dissolved organic carbon content is as high as 10g / min. kg; washed three times with deionized water at a solid-to-liquid ratio of 1:50, and the biochar adsorbent was BC-3.

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Abstract

The invention relates to a preparation method of a biological carbon adsorbent for repairing organic pollution. The method comprises the steps of (1) air-drying waste biomass and then grinding; (2) in presence of nitrogen, heating up biomass particles to 420-580 DEG C for carbonizing the biomass particles to obtain biological carbon for repairing organic pollution. The biological carbon adsorbing material which is rich in aromatic base functional groups can be used for the repair treatment of organic polluted water or organic polluted soil. The preparation method is simple in preparation technology and high in operability, and pays attention to the environmental protection cost and the economic cost during the preparation of biological carbon; aiming at an organic polluted environmental medium, biological carbon gives play to efficient repair and treatment effects.

Description

technical field [0001] The invention relates to a method for preparing a biological carbon adsorption material with a specific pollution repair function by using industrial and agricultural waste biomass as a raw material. Background technique [0002] Biomass carbon has a dense microporous structure and a high specific surface area. It has attracted extensive attention in the restoration and treatment of polluted water and soil environments, and has become a hot spot in the study of environmental pollution restoration. On the other hand, the carbon-rich functional group composition of biomass is closely related to its ability to repair and passivate pollutants, especially organic pollutants. A large number of studies have shown that biochar with a high degree of aromatization has strong adsorption and passivation capabilities for non-ionic organic pollutants; while biochar rich in oxygen-containing groups (carboxyl, hydroxyl, etc.) Organic pollutants have strong adsorption...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28B09C1/00
Inventor 罗磊许闯张淑贞
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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