Nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof

A technology of hydrated zirconia and composite hydrogel, which is applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Removal effect and other problems, to achieve the effect of long service life and enhanced mechanical strength

Active Publication Date: 2016-02-03
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has three main characteristics: (1) Strong toxicity, the toxic concentration of heavy metals is very low
(2) Sustainability, no treatment method can degrade and eliminate heavy metals in wastewater
[0008] Artificially synthesized polymer hydrogels have certain effects in the adsorption and removal of heavy metal ions because they have one or several functional groups. However,

Method used

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  • Nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof
  • Nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof
  • Nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035](1) Prepare mixed solution: take a certain amount of trans-aconitic acid monomer and dissolve it in deionized water as component A, then add a certain amount of 2-hydroxyethyl acrylate monomer as component B to the above solution, Distilled water is used as component C, mixed according to (A+B):C: 1:3 (v / v), where A:B is 1:1 (mol / mol); put the mixture in an ultrasonic cleaner for 17 minutes Mix the mixture evenly, and pass nitrogen into the uniformly mixed reactant solution to make it in an oxygen-free state.

[0036] (2) Radiation polymerization process: at a temperature of -78°C, 60 Irradiation polymerization under Co-γ rays for 24h, the radiation dose is 2×10 4 Gy: Cut the prepared polymer hydrogel into 1cm×1cm×1cm cubes, wash with distilled water for several times until the residue is washed, and dry at 50°C for later use.

[0037] (3) In-situ loaded nano zirconia: Weigh 2g xerogel into a 200ml Erlenmeyer flask, add 100ml 0.5mol / L ZrOCl 2 Solution, under the condi...

Embodiment 2

[0041] (1) Prepare mixed solution: take a certain amount of trans-aconitic acid monomer and dissolve it in deionized water as component A, then add a certain amount of 2-hydroxyethyl acrylate monomer as component B to the above solution, Distilled water is used as component C, mixed according to (A+B):C is 1:2 (v / v), wherein A:B is 1:2 (mol / mol); the mixture is placed in an ultrasonic cleaner for 23min Mix the mixture evenly, and pass nitrogen into the uniformly mixed reactant solution to make it in an oxygen-free state.

[0042] (2) Radiation polymerization process: at a temperature of -78°C, 60 Irradiation polymerization under Co-γ rays for 24h, the radiation dose is 1×10 5 Gy: Cut the prepared polymer hydrogel into 1cm×1cm×1cm cubes, wash with distilled water for several times until the residue is washed, and dry at 50°C for later use.

[0043] (3) In situ loaded nano zirconia: Weigh 2g xerogel into a 200ml Erlenmeyer flask, add 100ml 0.6mol / L ZrOCl 2 Solution, under the...

Embodiment 3

[0048] (1) Prepare mixed solution: take a certain amount of trans-aconitic acid monomer and dissolve it in deionized water as component A, then add a certain amount of 2-hydroxyethyl acrylate monomer as component B to the above solution, Distilled water is used as component C, mixed according to (A+B):C is 3:7 (v / v), wherein A:B is 1:5 (mol / mol); the mixture is placed in an ultrasonic cleaner for 18 minutes Mix the mixture evenly, and pass nitrogen into the uniformly mixed reactant solution to make it in an oxygen-free state.

[0049] (2) Radiation polymerization process: at -63°C, 137 Irradiation polymerization under Cs-γ rays for 24h, the radiation dose is 1.5×10 6 Gy: Cut the prepared polymer hydrogel into 1cm×1cm×1cm cubes, wash with distilled water for several times until the residue is washed, and dry at 50°C for later use.

[0050] (3) In-situ loaded nano zirconia: Weigh 2g xerogel into a 200ml Erlenmeyer flask, add 100ml 0.4mol / L ZrOCl 2 Solution, under the conditio...

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Abstract

The present invention provides a nanometer-hydrous zirconium oxide-loading composite hydrogel having carboxyl and hydroxyl, preparation and applications thereof. According to the present invention, two monomers such as 2-hydroxyethyl acrylate and trans-aconitic acid are mixed with distilled water, then radiation polymerization is performed to prepare a polymer hydrogel, the polymer hydrogel is adopted as a template to perform in-situ nanometer hydrous zirconium oxide loading, the in-situ nanometer hydrous zirconium oxide loading method is an in-situ chemical precipitation and heat treatment combination method, the concentration of a ZrOCl2 solution for the in-situ chemical precipitation reaction is 0.2-0.6 mol/L, the concentration of a NaOH solution is 0.6-1 mol/L, and the reaction temperature is controlled at 25 DEG C; and the nanometer hydrous zirconium oxide is subjected to in-situ loading, the method is simple, the operation is easy, heavy metals can be effectively removed by using the prepared composite hydrogel in adsorption of heavy metal ions in wastewater, and the service life of the composite hydrogel is long.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and in particular relates to a composite hydrogel with carboxyl and hydroxyl groups and loaded with nanometer hydrated zirconia, its preparation and application. Background technique [0002] Heavy metals are non-degradable pollutants that persist in the environment and can accumulate in organisms and humans through biomagnification and food chain transmission. Common heavy metal pollutants in water bodies include copper, zinc, nickel with certain toxicity and lead, cadmium, chromium, mercury with significant biological toxicity. It has three main characteristics: (1) Strong toxicity, and the toxic concentration of heavy metals is very low. (2) Persistence, the heavy metals in the wastewater cannot be degraded and eliminated by any treatment method. (3) Enrichment, heavy metals can be enriched in large quantities by organisms, and the enriched heavy metals can enter the human bo...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30B01J20/28C02F1/28C02F1/62
Inventor 李正魁张一品王浩杨建华朱倩韩华杨
Owner NANJING UNIV
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