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Nanocomposite for synchronously removing carbon, nitrogen and phosphorus and preparation method of nanocomposite

A nano-composite material, carbon and nitrogen technology, applied in the field of water pollution control, can solve the problems of ineffective adsorption and removal of phosphate, low inter-connectivity of voids, inability to adsorb organic matter, etc., achieve good denitrification effect, abundant reserves, desorption High effect of repeated use

Active Publication Date: 2017-08-18
同华禹水(上海)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because clinoptilolite itself has a negative charge, it cannot effectively adsorb and remove phosphate in water; at the same time, because its interstices are not highly interconnected, they are easy to block, so they cannot adsorb organic matter.

Method used

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  • Nanocomposite for synchronously removing carbon, nitrogen and phosphorus and preparation method of nanocomposite
  • Nanocomposite for synchronously removing carbon, nitrogen and phosphorus and preparation method of nanocomposite
  • Nanocomposite for synchronously removing carbon, nitrogen and phosphorus and preparation method of nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of nanocomposites

[0045] 1) Rinse an appropriate amount of natural clinoptilolite with a particle size of 0.5-1.0mm with deionized water for 5-6 times, and dry;

[0046] 2) Use CaCl 2 The solution carries out constant temperature flipping impregnation to the zeolite obtained in step 1);

[0047] 3) the zeolite obtained in step 2) is added to the CaCl of suitable concentration 2 , NaOH and polyethylene glycol in the mixed solution, using stirring to disperse evenly; then, slowly add H 2 o 2 solution;

[0048] 4) centrifuging the mixed solution obtained in step 3), and drying to obtain a nanoscale composite material in which carbon, nitrogen, and phosphorus are simultaneously removed.

[0049] Carry out transmission electron microscope analysis (TEM) to natural clinoptilolite and the nanocomposite material prepared by the present invention respectively, as Figure 1A and Figure 1B Shown to verify the preparation effect of nanocomposites. Scanning ele...

Embodiment 2

[0051] Phosphorus Removal Efficiency of Nanocomposites at Different pH Conditions

[0052] Get 0.4g of the nanoscale composite material prepared in Example 1, place 50ml in a centrifuge tube containing 40ml phosphorus-containing simulated sewage (phosphorus concentration is 100mg / L, initial pH is 5-12), and shake at a constant temperature (25°C) (160rmp) after 12 hours, measure the residual phosphorus concentration in the supernatant, and calculate the phosphorus removal rate. The result is as figure 2 As shown, under different pH conditions, the phosphorus removal rate is between 55.5%-85.0%; and when the pH is 7-11, the phosphorus removal efficiency is basically not affected by the value, and has a wide application space.

Embodiment 3

[0054] Phosphorus removal effect of nanocomposite materials in simulated sewage with different phosphorus concentrations

[0055] Get 0.5g of nanoscale composite material prepared in Example 1, place 50ml in the centrifuge tube that the phosphorus-containing simulated sewage (phosphorus concentration is 1-100mg / L, initial pH is 7) that 40ml different concentrations are housed, constant temperature (25 ℃) after shaking (160rmp) for 12 hours, measure the residual phosphorus concentration in the supernatant, and calculate the phosphorus removal rate. The result is as image 3 As shown, the removal rate of phosphorus is 74.1%-99.6%, and generally can reach more than 90%.

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Abstract

The invention relates to a nanocomposite for synchronously removing carbon, nitrogen and phosphorus and a preparation method of the nanocomposite. The method specifically comprises the following steps: flushing natural clinoptilolite with deionized water, and drying the natural clinoptilolite; performing constant-temperature turnover impregnation on the dried natural clinoptilolite by use of a soluble calcium salt solution, so as to obtain the pretreated natural clinoptilolite; adding the pretreated natural clinoptilolite into a mixed solution containing soluble calcium salt, alkali and polyethylene glycol, and stirring the mixed solution till uniform dispersion; slowly and dropwise adding an H2O2 solution into the mixed solution, and performing centrifugation and drying to obtain the nanocomposite. Compared with the prior art, the nanocomposite provided by the invention has fairly strong adsorption capacity and oxidation capacity on pollutants, and efficient and synchronous removal of carbon, nitrogen and phosphorus in different types of actually polluted water can be realized; the removal rate of nitrogen and phosphorus can exceed 80% or more, and the removal rate of carbon is 50% or more; and the nanocomposite has the advantages that the synchronous removal effect of carbon, nitrogen and phosphorus is good, the preparation technology is simple, and the like.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and relates to a nanocomposite material for synchronous removal of carbon, nitrogen and phosphorus and a preparation method thereof. Background technique [0002] With the continuous advancement of industrialization, the problem of industrial environmental pollution has become more common and more serious. At the same time, eutrophication of lakes and black and odorous rivers have become major water environment problems. According to relevant reports, some large lakes, such as Taihu Lake and Dianchi Lake, have serious eutrophication problems; more than 80% of urban rivers have perennial or seasonal black and odorous phenomena. Eutrophication and black odor have seriously affected the image of the city, the ecological environment and people's physical and mental health. Regardless of the type of water pollution, excessive nitrogen and phosphorus and organic pollution are the main ...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/32C02F1/28C02F1/72C02F101/16C02F101/30
Inventor 柴晓利周焜武博然杨宁李建国周萌
Owner 同华禹水(上海)科技有限公司
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