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Preparation and application methods for novel magnetic molecular sieve adsorbent material

A magnetic and raw material technology, applied in the field of preparation of new magnetic molecular sieve adsorbent materials, can solve the problems of difficult separation, small processing capacity, difficult large-scale application, etc., and achieve the effect of stable quality, good adsorption performance, and easy availability of raw materials

Inactive Publication Date: 2012-11-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, powder activated carbon adsorbent is not easy to separate in wastewater, and the treatment volume is small, so it is difficult to apply on a large scale.

Method used

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  • Preparation and application methods for novel magnetic molecular sieve adsorbent material
  • Preparation and application methods for novel magnetic molecular sieve adsorbent material
  • Preparation and application methods for novel magnetic molecular sieve adsorbent material

Examples

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example 1

[0021] The preparation method of example 1, ferromanganese spinel: a certain amount of manganese chloride and ferric chloride are dissolved in the ultrapure water of 20mL deoxygenation, ultrasonic-assisted dissolution (Mn in the final solution 2+ and Fe 3+ molar ratio = 1:2). 250mL (1.5mol / L) of NaOH solution (N 2 deoxidation for 30min) slowly dropwise into the above mixture, and vigorously stirred (~400r / min), the reaction temperature is controlled at 30°C, the reaction time is 1~1.5h, and N 2 Protect. The obtained solution was added into a Teflon-lined autoclave for crystallization at 100° C. for 3 h. After the reaction is completed, the magnetic material is separated under the action of an external magnetic field, washed with pure water and ethanol for 4 to 5 times, and vacuum-dried at 60° C. for 2 hours.

example 2

[0022] Example 2, the synthesis steps of molecular sieve-coated ferromanganese spinel method: 4.8g of cetyltrimethylammonium bromide is dissolved in 100g of ultrapure water, and 100mL of absolute ethanol and 34mL (28wt%) of ammonia are added. 0.005mol MnFe 2 o 4 After adding to the above solution, the mixture was vigorously stirred at 30° C. for 15 min with the aid of ultrasound. 6.8g of tetraethyl orthosilicate was slowly added dropwise to the above mixture, and vigorously stirred. After the dropwise addition was completed, the reaction was continued for 1.5h. The obtained solution was filtered by suction and washed with ultrapure water to pH ≈ 7. Vacuum-dried at 60°C for 4 hours, the dry glue was ground, heated to 400°C after 400 minutes, and calcined for 3 hours under nitrogen protection.

example 3

[0023] Example 3. Application of new magnetic molecular sieve adsorbent in water treatment: A certain oxytetracycline-containing wastewater, the concentration of oxytetracycline is 500μg / L, take 1L of wastewater, add 1g of new magnetic molecular sieve adsorbent, and stir under dark conditions Magnetic separation is performed after mixing for 2 hours, the concentration of oxytetracycline in the treated wastewater is less than 50 μg / L, and the adsorption removal rate is greater than 90%.

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Abstract

The invention relates to a preparation method for a novel magnetic molecular sieve adsorbent material which is used for removing antibiotic pollutants in water treatment, has good adsorption performance and can be easily separated by using a magnetic separation method. The preparation method comprises the following steps: mixing soluble manganese salt and ferric salt according to a mol ratio of 1: 2, adding alkali to neutralize an obtained mixture and then carrying out microwave-assisted hydro-thermal synthesis, crystallization, magnetic field separating, rinsing and drying so as to obtain a ferromanganese magnetic spinel material; adding prepared magnetic spinel into a mixed solution consisting of cetyltrimethylammonium bromide, ethanol, ammonia water and deionized water, carrying out ultrasonic and vigorous stirring, adding ethyl orthosilicate, then continuing stirring for a reaction and then successively carrying out pumping filtration, rinsing with pure water, drying under vacuum, grinding and calcining under the protection of nitrogen so as to prepare the novel magnetic molecular sieve adsorbent material. The magnetic molecular sieve adsorbent material has the characteristics of rapid adsorption, high efficiency magnetic separation and a high adsorption removal rate when used as an adsorbent for removal of tetracycline antibiotic pollutants like terramycin and aureomycin in waste water and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a preparation method of a novel magnetic molecular sieve adsorbent material which is used for removing antibiotic pollutants in water treatment, has good adsorption performance and is easy to be separated by a magnetic separation method, and belongs to the technical field of water treatment applications. Background technique [0002] Since the clinical application of penicillin in 1940, antibiotics have been widely used to treat human diseases and effectively protect human health. In addition, a large number of antibiotics are used in livestock, poultry and aquaculture to prevent animal diseases or as growth promoters. In recent years, a certain concentration of antibiotic residues has been detected in environmental media such as surface water, groundwater, drinking water, sludge, and soil. Although the detected concentration is not high (ng / L to μg / L level), continuous exposure Synergistic effects with multiple antibiotics ma...

Claims

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Application Information

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IPC IPC(8): C01B37/00C01B39/00B01J20/02C02F1/28
CPCY02A40/70
Inventor 强志民殷小伟鲍晓磊
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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