Preparation method of clay mineral modified biochar and application thereof

A technology of biochar modification, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., to achieve the effect of wide sources, short production cycle and low price

Inactive Publication Date: 2017-05-31
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a cheap attapulgite modified biochar material with good adsorption performance on 17β-estradiol pollutants

Method used

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  • Preparation method of clay mineral modified biochar and application thereof
  • Preparation method of clay mineral modified biochar and application thereof
  • Preparation method of clay mineral modified biochar and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A specific preparation method of the attapulgite modified biochar material of the present invention is as follows:

[0025] Weigh 20g of anhydrous zinc chloride solid and dissolve it in water, then add montmorillonite powder and biomass to the zinc chloride solution at a mass ratio of 1:2, stir or ultrasonically disperse and immerse for 24 hours. Wherein the mass ratio of biomass and zinc chloride is 1:2. The samples were placed in an oven at 70°C for 24h. The dried sample was placed in a horizontal tube furnace, and the quartz tube of the atmosphere furnace was kept sealed during the pyrolysis process, and N was introduced into the tube at a flow rate of 300 mL / min. 2 , in order to maintain the anaerobic conditions of the whole pyrolysis process, and at the same time increase the heating rate to 600°C at a heating rate of 10°C / min, and keep the temperature for 1.5h. After cooling to room temperature, wash with 1mol / L hydrochloric acid solution several times to remove...

Embodiment 2

[0028] The attapulgite-modified biochar material of the present invention treats the estrogen pollutant 17β-estradiol in the water body, comprising the following steps:

[0029] Take 100mL of 1-8mg / L17β-estradiol solution in conical flasks, add 0.005g attapulgite-modified biochar material into each conical flask, place it in a constant temperature oscillator in a water bath, and set it at 25°C The next reaction. After 24 hours, 10 mL of the solution was taken from each Erlenmeyer flask for centrifugation, and after centrifugation, it was filtered through a 0.45 μm filter membrane, and the filtrate was taken into a centrifuge tube. Fluorescence photometer was used to detect the solution concentration after reaction. The result is as figure 2 shown.

[0030] Depend on figure 2 It can be seen that under the condition of different initial concentration of 17β-estradiol, the attapulgite-modified biochar material has a strong adsorption capacity for 17β-estradiol in water. Un...

Embodiment 3

[0032] The attapulgite-modified biochar material of the present invention treats the estrogen pollutant 17β-estradiol in the water body, comprising the following steps:

[0033] Add 0.005g of attapulgite-modified biochar material into 100mL of 6mg / L 17β-estradiol solution, place in a water bath constant temperature oscillator, and react at 25°C. At different time intervals, 10 mL of the solution was taken for centrifugation, filtered through a 0.45 μm filter membrane after centrifugation, and the filtrate was taken into a centrifuge tube. Fluorescence spectrophotometer was used to detect the concentration of the solution after reaction. The results of the adsorption capacity at different times are attached image 3 shown.

[0034] Depend on image 3 It can be seen that the adsorption amount of attapulgite-modified biochar materials to 17β-estradiol in water increases continuously with the increase of time. Between 10min and 450min, the adsorption capacity increased rapidly...

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Abstract

The invention discloses preparation of a clay mineral modified biochar material and application of the clay mineral modified biochar material in removing estrogen, namely 17beta-estradiol, pollutants. The clay mineral modified biochar material is prepared from the following biochar raw materials of agricultural and forestry residues, straws, rice hulls, peanut hulls, sugarcane bagasse, wood shavings and the like. The preparation comprises the specific steps: activating a biomass and attapulgite for 24 hours by utilizing zinc chloride, roasting the mixture under 600 DEG C for 1.5 hours after drying, and washing and drying, thus obtaining the attapulgite modified biochar. The attapulgite modified biochar prepared by a method disclosed by the invention has a large amount of adsorption sites. Research on influence of the initial concentration, the pH (Potential of Hydrogen) and the time on adsorption of the 17beta-estradiol in a water body discovers that an attapulgite modified biochar material has stronger adsorption ability on the 17beta-estradiol; the attapulgite modified biochar material is simple in preparation, low in cost and excellent in adsorption performance, and is an adsorbent which is higher in application potential.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and in particular relates to a preparation method and application of attapulgite-modified biochar for removing organic pollutant 17β-estradiol in water bodies. Background technique [0002] Environmental Estrogens (Environmental Estrogens) refers to a class of compounds that have estrogenic activity or antagonize androgen effects, and can simulate or interfere with the physiological and biochemical effects of natural estrogens. After these compounds enter the body, they interfere with the synthesis, release, movement, metabolism, and combination of substances normally secreted in the body, and activate or inhibit the function of the endocrine system, thereby destroying its role in maintaining the stability and regulation of the body. As one of the most concerned estrogens, 17β-estradiol has been widely detected in surface water, groundwater an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/34
CPCB01J20/20B01J20/0244B01J20/12C02F1/288C02F2101/34
Inventor 江卢华刘云国曾光明刘少博尹志红李美芳
Owner HUNAN UNIV
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