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A kind of zirconium-based nano-hybrid material and its application method

A nano-hybrid material, zirconium-based technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve the problem of low phosphorus removal efficiency, and achieve the effect of good removal capacity and high loading capacity.

Active Publication Date: 2022-04-22
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the low removal efficiency of the adsorbents in the prior art for different forms of phosphorus, the present invention prepares a new type of zirconium-based nano-hybrid material with a gel-type strongly basic anion-exchange resin as the skeleton, and provides a Inorganic phosphorus co-removal-desorption recovery method, using hydrochloric acid to perform desorption pretreatment on the resin adsorbing inorganic phosphorus, to achieve efficient removal and recovery of various forms of inorganic phosphorus

Method used

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Embodiment 1

[0045] This embodiment is a preparation process of a novel zirconium-based nano-hybrid material, including the following steps:

[0046] 1) Weigh 70g of ZrOCl in a 500mL beaker 2 ·8H 2 0, and pour 100mL of water, concentrated hydrochloric acid, and absolute ethanol solution with a volume ratio of 1:1:2 to obtain a mixed solution;

[0047] 2) Weigh 30g of 201×4 resin, which was purchased from Nankai University Chemical Factory, add the resin to the above mixed solution (dosing concentration 300g / L), soak for 12h, and then put the resin at 50°C and 20rpm Heat and stir for 12 hours until the solution is not completely dry, then transfer to a watch glass to dry naturally, use a medicine spoon to crush the zirconium powder on the surface of the material, and use a 0.6mm sieve to remove the zirconium powder;

[0048] 3) Add the material obtained in step 2) into 200 mL of NaOH solution with a mass fraction of 5%, and stir at 300 rpm for 12 h. Filter out the material and wash with ...

Embodiment 2

[0055] 1) Using SEM-EDS to characterize the internal morphology and zirconium content of the material, the three materials are referred to as HZO-201×4 (Example 1), HZO-201 (Comparative Example 1) and HZONDA88 (Comparative Example 2), Specific results such as figure 1 shown. Among them, Figure a and Figure b are the cross-section morphology and Zr line scan diagram of the HZO-201 material obtained in Comparative Example 1; Figure c and Figure d are the cross-section morphology and Zr line scan diagram of the HZONDA88 material obtained in Comparative Example 2; Figure e and Figure f are the cross-section morphology and Zr line scan diagram of the material HZO-201×4 obtained in Example 1, respectively;

[0056] The results show that the zirconium distribution law of HZO-201 and HZONDA88 is more on both sides and less in the middle, and more HZO particles are loaded on the outer spherical layer; while the distribution of HZO inside HZO-201×4 is more uniform.

[0057] Second, co...

Embodiment 3

[0063] This embodiment is a preparation process of a novel zirconium-based nano-hybrid material, including the following steps:

[0064] 1) Weigh 100g of ZrOCl in a 500mL beaker 2 ·8H 2 0, and pour 100mL of water, concentrated hydrochloric acid, and absolute ethanol solution with a volume ratio of 1:1:2 to obtain a mixed solution;

[0065] 2) Weigh 5g of 201×4 resin, add it to the above mixed solution (dosing concentration 50g / L), soak for 24 hours, heat and stir at 40°C and 18rpm for 10 hours until the solution is not completely dry, and then transfer to The watch glass is air-dried naturally, and the zirconium powder on the surface of the material is crushed with a medicine spoon, and the zirconium powder is sieved with a 0.6mm sieve;

[0066] 3) Add the material obtained in step 2) into 200 mL of NaOH solution with a mass fraction of 15%, and stir at 300 rpm for 12 h. Filter out the material and wash with water until the effluent is neutral.

[0067] 4) Add the material...

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Abstract

The invention discloses a novel zirconium-based nano-hybrid material and an application method thereof, which belong to the field of deep phosphorus removal of sewage. The preparation method of the material comprises the following steps: (1) ZrOCl 2 ·8H 2 O is dissolved in a solution containing water, concentrated hydrochloric acid and absolute ethanol to obtain a mixed solution; (2) get a gel-type strongly basic anion exchange resin and add it to the mixed solution, first soak and stir at the same time; (3) The material is reheated and stirred until it is not completely dry, and then air-dried to obtain a resin intermediate, which is transferred to NaOH solution and continuously stirred; (4) Take out the material, wash it with water until neutral, air-dry naturally, and then transfer to sodium chloride solution for continuous After stirring, the material is filtered out, washed with water until neutral, washed with absolute ethanol, and dried to obtain a zirconium-based nano-hybrid material. The material of the invention can realize highly efficient removal and recovery of various forms of inorganic phosphorus, especially for difficult-to-remove condensed phosphate, which has an excellent removal effect and is conducive to popularization.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to a novel zirconium-based nano-hybrid adsorbent and its application method Background technique [0002] The existence of phosphorus element has its contradictions. On the one hand, phosphorus is the limiting nutrient element for algae in water bodies, and is the direct cause of eutrophication in water bodies. At the right temperature, excessive presence of cyanobacteria can lead to the outbreak of blue-green algae, causing insufficient dissolved oxygen in the water body and releasing deadly algal toxins, which in turn kill fish and a large number of harmless invertebrates, disrupting the ecological balance and affecting human health. On the other hand, phosphorus is an important agricultural nutrient that modern society relies on to maintain the global food supply. Rapid population growth and high demand for agricultural productivity have led to a substantial incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/30B01J20/34C02F1/28C02F101/10
CPCB01J20/027B01J20/0211B01J20/3475C02F1/281C02F2101/105
Inventor 花铭沈非凡潘丙才张延扬张炜铭吕路
Owner NANJING UNIV
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