Preparation method and application of silane coupling agent modified magnetic halloysite material

A technology of silane coupling agent and halloysite, which is applied in the cross field of environment and materials, can solve the problems of difficult separation of halloysite and low removal rate of pollutants, and achieve convenient and fast separation, high removal rate and strong adsorption capacity Effect

Inactive Publication Date: 2016-11-16
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation and application of a silane coupling agent-modified magnetic halloysite material in order to solve the problems of difficult separation of halloysite and low removal rate of pollutants. The method uses halloysite as a template, By in situ synthesis, ferric oxide particles were attached to the surface of halloysite nanotubes; the silane coupling agent was combined with halloysite / Fe 3 o 4 Mixing, reaction to graft silane coupling agents onto halloysite surfaces

Method used

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  • Preparation method and application of silane coupling agent modified magnetic halloysite material
  • Preparation method and application of silane coupling agent modified magnetic halloysite material
  • Preparation method and application of silane coupling agent modified magnetic halloysite material

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Effect test

Embodiment 1

[0018] Preparation of magnetic halloysite modified by silane coupling agent:

[0019] a. Acidification of halloysite: take halloysite powder and put it into a beaker with a concentration of 0.1mol / L HCl solution, stir at room temperature for 10 hours, then rinse repeatedly with distilled water, and centrifuge until the supernatant is neutral. dry and ready for use;

[0020] b. Iron-saturated halloysite: add the halloysite, ferric chloride hexahydrate and deionized water acidified in step a into the beaker according to the mass ratio of 10:1:100, mechanically stir for 24 hours, and centrifuge and discard The supernatant was repeated 3 times in this way, and dried to obtain an iron-saturated halloysite suspension, which was set aside;

[0021] c. Preparation of magnetic halloysite: under the protection of nitrogen, quickly add ammonia water to the iron-saturated halloysite suspension in step b, and stir vigorously to adjust the pH to 9-10, then slowly add sulfuric acid heptahyd...

Embodiment 2

[0026] a. Acidification of halloysite: put halloysite powder into a beaker, add HCl solution with a concentration of 0.1mol / L, stir at room temperature for 10 hours, then rinse repeatedly with distilled water, and centrifuge until the supernatant is neutral. dry and ready for use;

[0027] b. Iron-saturated halloysite: add the acidified halloysite, ferric chloride hexahydrate and deionized water into the beaker at a mass ratio of 10:1:100, mechanically stir for 24 hours, centrifuge and discard the supernatant solution, so repeated 3 times, dried to obtain iron-saturated halloysite suspension, for subsequent use;

[0028] c. Preparation of magnetic halloysite: under the protection of nitrogen, quickly add ammonia water to the iron-saturated halloysite suspension in step b, and stir vigorously to adjust the pH to 9-10, then slowly add sulfuric acid heptahydrate Ferrous until the suspension turns black, condense and reflux at 70°C for 3 hours, separate under a strong magnet to o...

Embodiment 3

[0032]a. Acidification of halloysite: put halloysite powder into a beaker, add HCl solution with a concentration of 0.1mol / L, stir at room temperature for 10 hours, then rinse repeatedly with distilled water, and centrifuge until the supernatant is neutral. dry and ready for use;

[0033] b. Iron-saturated halloysite: add the acidified halloysite, ferric chloride hexahydrate and deionized water into the beaker at a mass ratio of 10:1:100, mechanically stir for 24 hours, centrifuge and discard the supernatant solution, so repeated 3 times, dried to obtain iron-saturated halloysite suspension, for subsequent use;

[0034] c. Preparation of magnetic halloysite: under the protection of nitrogen, quickly add ammonia water to the iron-saturated halloysite suspension in step b, and stir vigorously to adjust the pH to 9-10, then slowly add sulfuric acid heptahydrate Ferrous until the suspension turns black, condense and reflux at 70°C for 3 hours, separate under a strong magnet to ob...

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Abstract

The invention belongs to the field of water treatment material preparation and in particular relates to a preparation method and application of a silane coupling agent modified magnetic halloysite material. The method is characterized by taking halloysite as a template and adhering Fe3O4 particles to the surface of a halloysite nanotube by an in-situ synthesis method; mixing a silane coupling agent with halloysite/Fe3O4 and grafting the silane coupling agent onto the surface of halloysite through reaction. The method has the beneficial effects that the raw materials are cheap and accessible; a functional group on the surface of the silane coupling agent modified magnetic halloysite material obtained by the method is bonded with a matrix via chemical bonds, so the material has strong bonding force; the material has high thermal stability, is convenient and fast to separate and recover, can be recycled multiple times, can serve as an adsorbent for eliminating heavy metal pollution of printing and dyeing wastewater and enables that the treated printing and dyeing wastewater can reach the national wastewater discharge standards.

Description

technical field [0001] The invention belongs to the intersecting field of environment and materials, and in particular relates to a preparation method and application of a silane coupling agent-modified magnetic halloysite material. Background technique [0002] Textile printing and dyeing sewage is one of the largest sources of sewage in my country, especially in Jiangsu and Zhejiang. According to incomplete statistics, my country produces about 2 billion tons of textile printing and dyeing sewage every year. Textile printing and dyeing wastewater has complex components, high COD, deep color, etc., and the heavy metal ions contained in it are non-degradable and persistent pollutants. Chromium and antimony are the more common metal ions. The toxicity, carcinogenicity and mutagenicity of hexavalent chromium are a major hazard to human health, and antimony in water has attracted more and more attention from the society. Antimony has been identified as a priority pollutant in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22C02F103/30
CPCB01J20/22B01J20/28009C02F1/285C02F2101/20C02F2101/22C02F2103/30
Inventor 贾汉忠祝可成段燕燕王富王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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