Method for preparing material for adsorbing heavy metal ions and rare earth ions

A technology for adsorbing heavy metals and rare earth ions, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems such as the influence of the overall efficiency of monomer graft polymerization

Inactive Publication Date: 2013-09-25
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this surface-initiated graft polymerization system is used to adsorb heavy metal ions and rare earth ions, not only free radicals are generated on the surface of solid particles, but also initiator free radicals are generated inside the solution, resulting in a certain amount of Homopolymers, therefore, the overall efficiency of monomer graft polymerization is affected

Method used

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  • Method for preparing material for adsorbing heavy metal ions and rare earth ions
  • Method for preparing material for adsorbing heavy metal ions and rare earth ions
  • Method for preparing material for adsorbing heavy metal ions and rare earth ions

Examples

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Effect test

Embodiment 1

[0027] A method for preparing a material for adsorbing heavy metal ions and rare earth ions, comprising the following steps:

[0028] (1) Chemical modification of the surface of silica gel: add 10g of activated silica gel to 100ml of water solvent, and add 10ml of γ-aminopropyltrimethoxysilane AMPS, react at 50°C for 20h, and the product after suction filtration is repeated with ethanol Washed and dried in vacuum to prepare surface-modified silica particles AMPS-SiO 2 ;

[0029] (2) Graft polymerization initiated on the surface of monomeric sodium styrene sulfonate SSS: Add 1.2 g of silica gel particles to a four-necked flask equipped with an electric stirrer, reflux condenser, constant pressure dropping funnel, and nitrogen inlet tube AMPS-SiO 2 , then add 80 mL of distilled water and 16.54 g of monomeric sodium styrene sulfonate SSS, add 20 mL of an aqueous solution in which 0.42 g of ceric ammonium sulfate and 0.3 mL of concentrated sulfuric acid are dissolved in a consta...

Embodiment 2

[0033] A method for preparing a material for adsorbing heavy metal ions and rare earth ions, comprising the following steps:

[0034] (1) Chemical surface modification of silica gel: add 15g of activated silica gel to 150ml of water solvent, and add 15ml of γ-aminopropyltrimethoxysilane AMPS, react at 50°C for 24h, and the product after suction filtration is repeated with ethanol Washed and dried in vacuum to prepare surface-modified silica particles AMPS-SiO 2 ;

[0035] (2) Graft polymerization initiated on the surface of monomeric sodium styrene sulfonate SSS: add 1.4 g of silica gel particles to a four-necked flask equipped with an electric stirrer, reflux condenser, constant pressure dropping funnel, and nitrogen gas inlet AMPS-SiO 2 , then add 80 mL of distilled water and 17.67 g of monomeric sodium styrene sulfonate SSS, add 20 mL of an aqueous solution in which 0.44 g of ceric ammonium sulfate and 0.3 mL of concentrated sulfuric acid are dissolved in a constant press...

Embodiment 3

[0038] A method for preparing a material for adsorbing heavy metal ions and rare earth ions, comprising the following steps:

[0039] (1) Chemical modification of the surface of silica gel: add 12g of activated silica gel to 130ml of water solvent, and add 13ml of γ-aminopropyltrimethoxysilane AMPS, react at 50°C for 22h, and the product after suction filtration is repeated with ethanol Washed and dried in vacuum to prepare surface-modified silica particles AMPS-SiO 2 ;

[0040] (2) The surface of the monomer sodium styrene sulfonate SSS initiates graft polymerization: In a four-necked flask equipped with an electric stirrer, a reflux condenser, a constant pressure dropping funnel and a nitrogen inlet pipe, add 1.3g of silica gel particles AMPS-SiO 2 , then add 80 mL of distilled water and 17.00 g of monomeric sodium styrene sulfonate SSS, add 20 mL of an aqueous solution in which 0.43 g of ceric ammonium sulfate and 0.3 mL of concentrated sulfuric acid are dissolved in a co...

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Abstract

The invention discloses a method for preparing a material for adsorbing heavy metal ions and rare earth ions and relates to functional complex particles. The method comprises the following steps: performing chemical modification on the surface of silica gel, and preparing silica gel particles AMPS-SiO2 subjected to surface modification; mixing 1.2-1.4g of silica gel particles AMPS-SiO2, 80mL of distilled water and 16.54-17.67g of monomer sodium styrene sulfonate (SSS), adding 20mL of aqueous solution in which 0.42-0.44g of ammonium cerous sulfate and 0.3mL of concentrated sulfuric acid are dissolved into a constant-pressure dropping funnel, carrying out a mixed reaction, and separating product particles to obtain the grafted particle PSSS/SiO2. The grafted particle PSSS/SiO2 has the characteristics of anionic polyelectrolyte, has excellent mechanical property and high thermal and chemical stability of the silica gel particles and has high adsorption performance on the heavy metal ions and rare earth ions.

Description

technical field [0001] The invention relates to functional composite microparticles, in particular to a method for preparing materials for absorbing heavy metal ions and rare earth ions. Background technique [0002] Grafting functional macromolecules on the surface of inorganic particles is an important way to prepare functional composite particles. This functional composite particle combines the functionality of functional macromolecules with the excellent physical, chemical and mechanical properties of inorganic particles. fields have important applications. [0003] The chemical grafting method of grafting macromolecules on the surface of solid particles can be basically divided into two types: "grafting onto" (Grafting onto) method and "grafting from" (grafting from) method. The chemical reaction between the active groups on the surface of the particulate material and the coupling of the polymer to the surface of the particulate material is simple, but the grafting sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F212/14B01J20/26B01J20/30C02F1/28C02F101/22C02F101/20
Inventor 安富强杜瑞奎高保娇
Owner ZHONGBEI UNIV
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