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Preparation method and application for modified zeolite adsorbent

A technology for modifying zeolite and adsorbent, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., to achieve the effects of high utilization rate, efficient utilization and low cost

Inactive Publication Date: 2009-12-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far there is no research report on the use of halogenated alkylpyridine modified zeolite to adsorb and remove humic acid and other organic substances in water

Method used

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  • Preparation method and application for modified zeolite adsorbent
  • Preparation method and application for modified zeolite adsorbent

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Take the natural zeolite, wash it several times with distilled water, air-dry it, crush it, grind it, and pass it through an 80-mesh sieve for later use; the prepared concentration is 50mmol L -1 cetylpyridinium bromide stock solution for use.

[0024] (2) Weigh 9g of ground and sieved zeolite and Erlenmeyer flask, pipette 36ml with a concentration of 50mmol L -1 After cetylpyridinium bromide (CPB) stock solution and zeolite were fully mixed, placed in a 40°C constant temperature water area oscillator and oscillated at 160rpm for 2d, after standing for 2d, centrifuged at 3000rpm, using the ultraviolet spectrometer method (λ = 259nm) to analyze the CPB concentration in the supernatant, calculate the equilibrium concentration according to the CPB standard curve, and obtain the adsorption capacity of CPB as 199.5mmol / g zeolite. Finally, the CPB modified zeolite was washed with distilled water until no CPB was detected in the cleaning supernatant, then placed in a beak...

Embodiment 2

[0027] (1) Take the natural zeolite, wash it several times with distilled water, air-dry it, crush it, grind it, and pass it through an 80-mesh sieve for later use; the prepared concentration is 50mmol L -1 cetylpyridinium bromide (CPB) stock solution for use.

[0028] (2) Weigh 9g of ground and sieved zeolite and Erlenmeyer flask, pipette 63ml with a concentration of 50mmol L -1 After fully mixing the CPB stock solution with zeolite, place it in a constant temperature water area at 40°C and vibrate at 160rpm for 2d, then centrifuge at 3000rpm after standing for 2d, and analyze the concentration of CPB in the supernatant by UV spectrometer (λ=259nm) , the equilibrium concentration was found on the CPB standard curve, and the calculated adsorption capacity of CPB was 329.3mmol / g zeolite. Finally, the CPB modified zeolite was washed with distilled water until no CPB was detected in the cleaning supernatant, then placed in a petri dish for blast drying at 60° C., and the modifie...

Embodiment 3

[0031] (1) Take the natural zeolite, wash it several times with distilled water, air-dry it, crush it, grind it, and pass it through an 80-mesh sieve for later use; the prepared concentration is 50mmol L -1 cetylpyridinium chloride (CPC) stock solution for future use.

[0032] (2) Weigh 9g of ground and sieved zeolite and Erlenmeyer flask, pipette 27ml with a concentration of 50mmol L -1 After fully mixing the CPC stock solution and zeolite, place it in a constant temperature water area at 40°C and vibrate at 160rpm for 2d, then centrifuge at 3000rpm after standing for 2d, and analyze the concentration of CPC in the supernatant by UV spectrometer (λ=259nm). , the equilibrium concentration was found on the CPC standard curve, and the adsorption capacity of CPC was calculated to be 149.85mmol / g zeolite. Finally, the CPC modified zeolite was washed with distilled water until no CPC was detected in the cleaning supernatant, and then placed in a beaker at 60° C. for blast drying, ...

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Abstract

The invention belongs to the technical field of purification of drinking water source water and governance of organic pollutants, and in particular relates to a preparation method for modified zeolite adsorbent and application. The concrete method comprises the following steps: firstly, screening, cleaning, drying, crushing and sieving natural zeolite for standby; secondly, preparing alkyl halide pyridine solution with certain concentration for standby; thirdly, quantitatively weighing a plurality of portions of standby zeolite and putting the zeolite into a conical flask, transferring modifier stock solution according to different solid-to-liquid ratios, reacting the zeolite with the modifier stock solution for certain time at certain temperature and certain oscillating speed, then standing the mixture to carry out solid-liquid separation, and cleaning the product by water till a modifier cannot be detected out; and finally, drying the product at certain temperature to obtain a modified zeolite adsorbent product. The adsorbent which is applied to adsorbing and removing organic substance humic acid and the like in water has good effect. The method realizes efficient utilization of cheap natural resources; and the prepared product is suitable for removing the organic substance humic acid and the like in the water of water sources with high organic substance content, and has the advantages of high utilization rate, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of drinking water source water purification and organic pollutant treatment, and in particular relates to a preparation method and application of a modified zeolite adsorbent. Background technique [0002] Dissolved organic matter represented by humic acid can undergo a series of reactions with drinking water disinfectant chlorine to form various potential carcinogens such as chloroform and halogenated acids. Therefore, the content of organic matter in source water has become drinking water pollution. As an important object of control, how to economically and efficiently remove humic acid and other organic pollutants in water has become a research hotspot in the treatment of organic pollutants in drinking water sources. The traditional methods for removing humic acid in water mainly include membrane filtration, flocculation, oxidation, biological methods, etc. However, there are some problems in the actual a...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/18C02F1/28
Inventor 朱志良詹艳慧仇雁翎高乃云赵建夫
Owner TONGJI UNIV
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