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Process for preparing composite adsorbent for fast removing persistent orgnism from water

A composite adsorption and water removal technology, used in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. Effect

Inactive Publication Date: 2006-01-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption of activated carbon on organic matter is not selective (most of the adsorbed are non-toxic natural organic matter and organic matter with high concentration such as protein and organic acid).
In addition, it has been reported in the literature that activated carbon has a minimum concentration for the adsorption of certain organic substances in water. When the concentration is lower than this minimum concentration, activated carbon cannot play a role. For example, when the concentration of organic halides in water is less than 5 μg / L, activated carbon does not produce Adsorption
Therefore, the adsorption effect of activated carbon on low-content, lipophilic persistent organic pollutants is not ideal, but there is no better adsorption material for organic matter.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take acetone, dioxane, magnesium perchlorate, cellulose acetate and neutral biological lipid with a mass ratio of 35:5:1:9:1 and place them in a 250mL Erlenmeyer flask, put them on a constant temperature shaker, and set the temperature 25°C, rotating speed 150rpm, until the cellulose acetate is completely dissolved, and prepare the composite adsorbent. Scanning electron microscopy, infrared, XPS and other methods have been used to analyze and prove that a layer of film composed of biological lipids and polymers is coated on the activated carbon.

Embodiment 2

[0028] The removal effect of the composite adsorbent on POPs was tested by shaking flask experiments. Take a number of 500mL conical flasks with ground mouth and stoppers, add 250ml of 20μg / L dieldrin aqueous solution and 5g of composite adsorbent, and place them in a constant temperature oscillator. 25 ℃, rotating speed is 150rpm, take out after different time, pass through the solid-phase extraction column (C-18, 500mg, 3mL, Agilent Co., USA) Concentration and enrichment, use gas chromatograph (GC6890N, Agilent Co. USA) Analyze the residual Di reagent content in water samples. The results showed that the removal rate of dieldrin was 99.9% after 12 hours.

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PUM

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Abstract

The present invention discloses the preparation process of composite adsorbent comprising active carbon, biolipid and polymer membrane, and belongs to the field of water processing technology application. The preparation process of the adsorbent includes the following main steps: 1. dissolving biolipid and polymer material in acetone, adding certain amount of additive, and supersonic dispersing to form homogeneous filming liquid; and 2. painting the filming liquid onto active carbon with vacuum suction filtering device and drying the coated adsorbent to volatilize acetone and other organic solvent. The composite adsorbent of the present invention has excellent effect of eliminating persistent organism in very low concentration from water, especially drinking water.

Description

technical field [0001] The invention relates to a composite adsorbent and a preparation method thereof. Specifically, granular activated carbon is used as a support carrier, and a polymer film containing biological lipids is evenly coated on the surface of the activated carbon to form a composite adsorbent, which is used to efficiently remove low-concentration in water. The invention relates to persistent organic pollutants, belonging to the field of water treatment technology and application. Background technique [0002] The vast majority of persistent organic pollutants (POPs) are lipophilic organic substances (such as dioxins), usually at extremely low concentrations in water (ng-pg / L), but these pollutants are highly toxic, It is difficult to degrade under environmental conditions, and can be enriched in the fat of organisms, which seriously threatens the health and survival of human beings through long-term continuous effects. In recent years, the research on POPs at ...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/20B01J20/22
Inventor 曲久辉茹加刘会娟代瑞华
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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