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A kind of composite adsorbent loaded with nanomolybdate resin, preparation method and application

A technology of resin compounding and molybdate, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as difficult separation and uneven shape, and achieve high mechanical strength and good stability , the effect of multiple active sites

Active Publication Date: 2021-10-29
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when molybdate is directly applied to water as an adsorbent, there are some defects: common molybdate crystals contain discrete Mo-O tetrahedral ions, which are difficult to separate from water due to their small size
However, the common nanomolybdate uses hydrothermal method, solid phase method and ball milling method. It is difficult to generate nanomolybdate in the limited space of the adsorption resin material in the hydrothermal method. The size of the solid phase method and ball milling method is still Stay in the submicron or even micron stage, and the shape is not uniform

Method used

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  • A kind of composite adsorbent loaded with nanomolybdate resin, preparation method and application
  • A kind of composite adsorbent loaded with nanomolybdate resin, preparation method and application
  • A kind of composite adsorbent loaded with nanomolybdate resin, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: (1) ammonium molybdate is added in the aqueous solution (the mass ratio of ammonium molybdate and water is 1:9), stirs 30 minutes with magneton 80r / min, after ammonium molybdate dissolves completely, add D201 resin ( The mass ratio of D201 resin to ammonium molybdate is 1:5), after sealing, stir at 25°C for 8 hours at a speed of 80r / min to obtain the first step product, and filter to separate the resin from the solution. Wash with deionized water repeatedly to obtain D201 resin with fixed molybdate ions.

[0049] (2) Add the D201 resin and ferric nitrate nonahydrate obtained in the previous step to the water (the mass ratio of D201 resin, ferric nitrate nonahydrate and water is 1:5:100), and use the magneton 80r / Stir at a speed of 1 min until the ferric nitrate nonahydrate is completely dissolved, continue to stir sufficiently to disperse the D201 resin evenly, seal it and stir at 25°C for 24 hours to obtain a crude product.

[0050] (3) The crude produc...

Embodiment 2

[0054] Embodiment 2: The nano-molybdate resin composite adsorbent prepared by this embodiment has the same basic structure as described in Example 1, but changes the parameters in the steps of the synthetic method to obtain a higher dispersion of nano-molybdenum-loaded Salt resin composite adsorbent, the specific method is as follows:

[0055] (1) Add ammonium molybdate into the aqueous solution (mass ratio of ammonium molybdate to water is 1:9), stir with magnet 80r / min for 30 minutes, after the ammonium molybdate is completely dissolved, add D201 resin (D201 resin and molybdenum The mass ratio of ammonium acid is 1:5), after sealing, under the condition of 25°C, stir for 8 hours at the speed of magneton 80r / min to obtain the product of the first step, filter to separate the resin from the solution, and use deionized water After repeated washing, the D201 resin with fixed molybdate ions was obtained.

[0056] (2) Add the D201 resin, ferric nitrate nonahydrate and sodium chlo...

Embodiment 3

[0061] Embodiment 3: Carry nanometer molybdate resin composite adsorbent, its basic structure is identical with that described in embodiment 2, but change resin base, obtain new composite adsorbent material, concrete method is as follows:

[0062] (1) Add ammonium molybdate into the aqueous solution (mass ratio of ammonium molybdate to water is 1:9), stir with magnet 80r / min for 30 minutes, after ammonium molybdate is completely dissolved, add D301 resin (D301 resin and molybdenum The mass ratio of ammonium acid is 1:5), after sealing, under the condition of 25°C, stir for 8 hours at the speed of magneton 80r / min to obtain the product of the first step, filter to separate the resin from the solution, and use deionized water After repeated washing, the D301 resin with immobilized molybdate ions was obtained.

[0063] (2) Add the D301 resin, ferric nitrate nonahydrate and sodium chloride obtained in the previous step to the water (the mass ratio of D301 resin, ferric nitrate non...

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Abstract

The invention discloses a nano-molybdate resin-loaded composite adsorbent, a preparation method and an application thereof. The composite adsorbent includes a carrier adsorption resin and molybdate nanoparticles; the carrier resin is a resin containing amino groups, and the The molybdate nanoparticles are combined with the adsorption resin through ionic bonds. The nano-molybdate resin-loaded composite adsorbent prepared by the method of the present invention has the advantages of high stability, good phosphorus removal effect at low concentration, not affected by interfering ions, and easy separation from water bodies, and can be effectively put into environmental applications , the advantages of no secondary pollution risk after use, broad application prospects.

Description

technical field [0001] The invention belongs to nano inorganic-organic composite materials, in particular to a composite adsorbent loaded with nano molybdate resin, its preparation method and application. Background technique [0002] Molybdate is an important component of inorganic functional materials. Its structure is tetrahedron, and its molybdenum ion is located at the symmetry center of the tetrahedron, which has relatively good stability. Due to the diversity and flexibility of its valence and structure, it has gradually become an important new type of functional material in recent years. It has been widely used in the fields of catalysis, adsorption, energy storage, ion exchange and photoelectric facilities. Expand to the field of water pollution treatment. Nano-molybdates of different types and structures can be constructed by selecting different metal ions and molybdate ions, and the size and shape of nano-molybdates can be adjusted by controlling the synthesis co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/10
CPCB01J20/0218B01J20/261C02F1/288C02F2101/105
Inventor 杨维本杨朕朱炜黄晓华张少鹏张毅
Owner NANJING NORMAL UNIVERSITY