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Preparation and application of hydrothermal carbon/attapulgite/beta-FeOOH composite adsorbent

A technology of attapulgite and hydrothermal carbon, which is applied in water/sludge/sewage treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of low cost, achieve low cost, short production cycle, The effect of the simple and easy preparation method

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

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a hydrothermal charcoal / attapulgite / β-FeOOH composite adsorption material with low cost and good adsorption performance on 17β-estradiol pollutants

Method used

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  • Preparation and application of hydrothermal carbon/attapulgite/beta-FeOOH composite adsorbent

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Embodiment 1

[0029] A specific preparation method of hydrothermal charcoal / attapulgite / β-FeOOH composite material according to the present invention is as follows:

[0030] Weigh 3g of attapulgite powder and 5g of biomass in 65mL of distilled water. After magnetic stirring at room temperature for 2 hours, it was added to a 100 mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and the filling rate was kept at 80%. The reaction temperature was 180°C, and the temperature was kept for 16 hours. The resulting black product was washed several times alternately with distilled water and methanol. Finally, the samples were placed in a vacuum oven at 60 °C for 24 h. After drying, a certain amount of KOH was added dropwise on the surface of the hydrothermal carbon, wherein the mass ratio of KOH and hydrothermal carbon was 4:1. After natural air-drying, the KOH-impregnated hydrothermal carbon was placed in a horizontal tube furnace, and N was introduced into the tube at...

Embodiment 2

[0034] The hydrothermal charcoal / attapulgite / β-FeOOH composite material of the present invention treats the estrogen pollutant 17β-estradiol in the water body, comprising the following steps:

[0035] Take 100mL of 1~8mg / L17β-estradiol solution in Erlenmeyer flasks, add 0.005g of hydrothermal charcoal / attapulgite / β-FeOOH composite material into each Erlenmeyer flask, and place them in a constant temperature oscillator in a water bath , reacted at 25°C. 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 results are shown in Table 1:

[0036] Table 1: Adsorption data under different initial concentrations of 17β-estradiol

[0037] Initial concentration (mg / L) Adsorption capacity (mg / g) 1 20.05 3 5...

Embodiment 3

[0040] The hydrothermal charcoal / attapulgite / β-FeOOH composite material of the present invention treats the estrogen pollutant 17β-estradiol in the water body, comprising the following steps:

[0041] Add 0.005g of hydrothermal charcoal / attapulgite / β-FeOOH composite 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 figure 2 shown.

[0042] Depend on figure 2 It can be seen that the adsorption amount of 17β-estradiol in water by hydrothermal charcoal / attapulgite / β-FeOOH composite material increases with time. Between 10min and 500min, th...

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Abstract

The invention relates to a hydrothermal carbon modified material capable of removing an environmental estrogen pollutant 17beta-estradiol, in particular to a hydrothermal carbon / attapulgite / beta-FeOOH composite material. A preparation method of the material comprises the following steps: performing hydrothermal carbonization on attapulgite and biomass; assembling the attapulgite on the surface of hydrothermal carbon; activating with KOH; loading beta-FeOOH onto the surface of the material; increasing the specific surface area to prepare a high-performance hydrothermal carbon / attapulgite / beta-FeOOH composite adsorption material. The modified hydrothermal carbon material prepared by the method has a large quantity of adsorption sites, and can be used for efficiently removing the environmental estrogen 17beta-estradiol. Moreover, the hydrothermal carbon modified material is easy to prepare, is low in cost, has high adsorption performance, and is an adsorbent with a wide market prospect.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and new water treatment technologies, and specifically relates to a preparation method and application of a hydrothermal charcoal / attapulgite / β-FeOOH composite adsorbent for removing 17β-estradiol, an organic pollutant in water bodies. Background technique [0002] Environmental Estrogens (Environmental Estrogens) are a kind of biological organisms to maintain normal dynamic balance, Environmental chemicals that adversely affect reproduction, growth, and behavior (exogenous substances to organisms). Environmental estrogen has become the third largest environmental problem after the destruction of the ozone layer and global warming, and has been hailed as a time bomb that threatens the survival of human beings. The endogenous estrogen is the natural steroid estrogen excreted by humans and animals, which has the strongest endocrine disrupting effect. Among them, when the content o...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/34
CPCB01J20/20B01J20/0229B01J20/12B01J2220/42B01J2220/4875C02F1/281C02F2101/34
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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