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Preparation and application of CTAB (cetyl trimethyl ammonium bromide) surface-activated clay mineral-loaded nano metal oxide

A technology of surface activation and clay minerals, applied in the direction of water pollutants, other chemical processes, chemical instruments and methods, etc., to achieve the effects of environmental friendliness, high removal efficiency, and low raw material cost

Inactive Publication Date: 2017-05-17
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: aiming at the current water bodies polluted by endocrine disruptors, to develop a highly efficient adsorbent for CTAB surface activated clay mineral loaded iron manganese oxides that can be used to treat pollutants

Method used

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  • Preparation and application of CTAB (cetyl trimethyl ammonium bromide) surface-activated clay mineral-loaded nano metal oxide
  • Preparation and application of CTAB (cetyl trimethyl ammonium bromide) surface-activated clay mineral-loaded nano metal oxide
  • Preparation and application of CTAB (cetyl trimethyl ammonium bromide) surface-activated clay mineral-loaded nano metal oxide

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Embodiment 1

[0028] A specific preparation method of CTAB surface activated clay mineral loaded iron-manganese oxide according to the present invention is as follows:

[0029] Add 20g of attapulgite to 500mL of dilute hydrochloric acid solution (25%) and stir for 8h to exchange interlayer cations including Ca 2+ , Mg 2+ Wait, centrifuge. Then add 5g sodium chloride and mix for 6h, use Na + Exchange interlayer cations. Then, the attapulgite was separated by a centrifuge, washed, dried and pulverized. The pretreated attapulgite and CTAB (0.008mol, 100mL) were mixed and ultrasonicated. Then, wash repeatedly with distilled water to remove water-soluble particles, and then filter with filter paper. Finally, dry and sieve to obtain CTAB-activated attapulgite with the same particle size.

[0030] Dissolve 2.37g of potassium permanganate in 200ml of deionized water, then add 2g of CTAB-activated attapulgite into the solution, and vibrate for 24h in an oscillator with a rotational speed of 18...

Embodiment 2

[0034] The CTAB surface activated clay mineral-loaded iron-manganese oxide composite material of the present invention treats 17β-estradiol in water, comprising the following steps:

[0035]Take 50 mL of 0.2-6 mg / L 17β-estradiol solution in Erlenmeyer flasks, add 5 mg of the material to each Erlenmeyer flask, place in a constant temperature shaker in a water bath, and react 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 result is as figure 2 It can be seen that under the condition of different initial concentrations of 17β-estradiol, the material has a higher adsorption capacity for 17β-estradiol in water. It has an adsorption capacity of 15.86mg / g under the condition of the initial concentration of 0.2m...

Embodiment 3

[0037] The CTAB surface activated clay mineral-loaded iron-manganese oxide composite material of the present invention treats salt 17β-estradiol in water, comprising the following steps:

[0038] 0.01 g of the material was added to 50 mL of 6 mg / L 17β-estradiol solution, placed in a water bath constant temperature oscillator, and reacted 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 It was shown that the adsorption capacity of 17β-estradiol in water by clay mineral-supported iron-manganese oxide composites activated on CTAB surface increased with time. Between 10min and 120min, the adsorption capacity increased rapidly, and began to reach s...

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Abstract

The invention relates to a preparation method and application of a CTAB (cetyl trimethyl ammonium bromide) surface-activated clay mineral-loaded nano-iron manganese oxide adsorbent for removing an emerging organic pollutant 17beta-estradiol in water. Surface treatment is carried out on attapulgite clay mineral by using CTAB, iron and manganese oxides are loaded on the surface, adsorption sites of the material are added, so that the adsorptive property of attapulgite on the pollutant in the water is strengthened. The preparation method comprises the following specific steps of carrying out pretreatment on the attapulgite by using a hydrochloric acid and sodium chloride, carrying out surface activation on the attapulgite by using the CTAB and loading the iron and manganese oxides to the surface to increase the adsorption sites. The CTAB surface-activated clay mineral-loaded nano-iron manganese oxide adsorbent prepared by the method has relatively high removal capacity on the 17beta-estradiol in the water and is high in adsorption rate, and the 17beta-estradiol in the water can be quickly treated. The material is low in cost, simple and feasible, massive production can be realized, and the product is nontoxic and harmless and is an organic matter adsorption material with a relatively good application prospect.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and specifically relates to a preparation method and application of a CTAB surface-activated clay mineral-loaded nano-iron-manganese oxide adsorbent for removing emerging organic pollutants 17β-estradiol in water bodies . Background technique [0002] Environmental endocrine disrupting chemicals (Environmental Endocrine Disrupting Chemicals, EDCs) are a class of compounds that can disrupt the normal endocrine function of organisms. Usually, their concentration in the environment is extremely low, and their acute toxicity is very weak. At first, they did not attract people's attention. As a kind of estrogen endocrine disruptor, estrogen generally exists in the environment in trace or trace concentrations. Its chemical properties are stable and not easy to be degraded. It can exist and accumulate in the body for a long time, and it is transmitte...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/34C02F101/30
CPCB01J20/223C02F1/288C02F2101/305C02F2101/34
Inventor 江卢华刘云国曾光明刘少博尹志红
Owner HUNAN UNIV
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