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
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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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