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Manometer magnetofluid and application thereof to purification of pollutants

A nano-magnetic fluid, nano-magnetic material technology, applied in magnetic liquid, oxidized water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve problems affecting catalytic reaction and adsorption reaction application, and achieve high stability, The effect of strong adsorption capacity and high catalytic activity

Active Publication Date: 2015-01-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrofluid has been used in the field of pollutant purification, but it does not use the characteristic of ferrofluid to produce weight-like aggravation and weight loss under the action of a magnetic field to affect the surface tension of the liquid during the reaction process and the components in the liquid. Partial pressure, the solubility of pollutants and oxygen in the liquid, and the mass transfer process in the reaction system ultimately affect the application of catalytic reactions and adsorption reactions. At the same time, as a reaction medium, magnetic fluid can also realize the separation of reaction products and catalysts.

Method used

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  • Manometer magnetofluid and application thereof to purification of pollutants
  • Manometer magnetofluid and application thereof to purification of pollutants
  • Manometer magnetofluid and application thereof to purification of pollutants

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Example 1: Ben Fe 3 o 4 / TiO 2 The composition and mass percentage of the magnetic fluid is a nano-magnetic material Fe with a core-shell structure 3 o 4 / TiO 2 15%, surfactant sodium oleate 3%, base carrier liquid water 82%.

[0044] The above Fe 3 o 4 / TiO 2 The preparation and application process of ferrofluid is as follows:

[0045] (1) Weigh 1kg of FeCl respectively 2 4H 2 0 and 2 kg FeCl 3 ·6H 2 0, and then add NaOH solution to the mixture of the two, adjust the pH of the mixed solution to 11, stir at a high speed at 50°C for precipitation reaction, and obtain Fe 3 o 4 Particles: Measure OP-10, n-hexanol, cyclohexane and concentrated ammonia water according to the ratio of 1.2:1:1:2.4, mix them to form a microemulsion system, add dilute hydrochloric acid to pickle the treated Fe in sequence under nitrogen protection 3 o 4 Colloidal solution (adjust the pH of the solution to neutral) and butyl titanate, after stirring vigorously for 3 hours, b...

Embodiment 2

[0050] Example 2: This Ni / SiO 2 The composition and mass percentage of the magnetic fluid is a nano-magnetic material Ni / SiO with a core-shell structure 2 20%, surfactant polyethylene glycol (4000) 10%, base carrier liquid water 70%.

[0051] Above Ni / SiO 2 The preparation and application process of ferrofluid is as follows:

[0052] (1) Dissolve 1 kg of nickel chloride in ethylene glycol, prepare a 0.1mol / l nickel chloride solution, and stir magnetically at a constant temperature of 20°C for 10 minutes to obtain solution A; mix NaOH and hydrazine hydrate (n(NaOH):n (NiC1 2 )=1:10, n(N 2 h 4 ):n(NiC1 2 ) = 3:1) dissolved in ethylene glycol to obtain solution B; slowly add solution A to solution B, then add polyvinylpyrrolidone PVP (K-30), stir and put it into a microwave oven, under the action of electric stirring, medium Heat on fire, cool the product, and centrifuge to obtain nano-nickel powder; add Ni powder to ethanol / water mixed solution (volume ratio 1:2), s...

Embodiment 3

[0057] Example 3: The composition and mass percentage of the Fe / Au magnetic fluid are 30% of the core-shell structure nano-magnetic material Fe / Au, 12% of the surfactant sodium oleate, and 58% of the carrier liquid water.

[0058] The preparation and application process of the above-mentioned Fe / Au magnetic fluid are as follows:

[0059] (1) In a reverse micellar system composed of cetyltrimethylammonium bromide (CTAB), n-butanol, n-octane and water, NaBH 4 As a reducing agent, ferrous sulfate and chloroauric acid were successively reduced to generate Fe nuclei in the reverse micellar system, HAuCl 4 The addition of aqueous solution increases the size of the reverse micelles, due to the excess NaBH 4 The presence of Au in the outer layer of Fe is reduced to generate Fe / Au nano-magnetic particles with a core-shell structure. The prepared Fe / Au magnetic nanoparticles are added to the aqueous solution of sodium oleate, stirred for 10 minutes while ultrasonically dispersed,...

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Abstract

The invention discloses a nanometer magnetofluid which is a stable colloidal liquid formed by mixing a nanometer magnetic material with a core-shell structure, a surfactant and a base carrier liquid. The nanometer magnetofluid disclosed by the invention is applied to purification of wastewater and waste gas, and is placed in a controllable magnetic field to treat the wastewater and the waste gas, and is capable of further completing purification of the wastewater and the waste gas and the product separation under the catalysis action or adsorption action of the nanometer magnetofluid by controlling the size and the direction of the magnetic field. By adopting the nanometer magnetofluid, the defect that a common liquid phase catalyst is difficultly separated and recovered can be changed, the adsorption efficiency is improved, the desorption and the regeneration of an adsorbent become relatively easy, the purpose of recycling is achieved while the pollutants are effectively removed; by adopting the nanometer magnetofluid, the control of the pollutants of the waste gas and the wastewater can be realized, and thus an energy-saving, environment-friendly and economical method is obtained.

Description

technical field [0001] The invention relates to a nano-magnetic fluid and the application of the nano-magnetic fluid in purifying pollutants, and belongs to the technical field of pollution control for treating waste gas and wastewater. Background technique [0002] Yellow phosphorus is a very important chemical raw material. It can be used as a raw material to produce hundreds of products such as phosphoric acid, pesticides, washing liquid, and phosphate fertilizer. However, its production process is high energy consumption and high pollution. The composition of yellow phosphorus tail gas is complex. In addition to mainly containing CO, it also contains highly corrosive impurities such as phosphorus, sulfur, arsenic, and fluorine, and a small amount of water. Phosphorus is mainly in the form of pH 3 and P 4 Exist in the form; sulfur is mainly in the form of H 2 S, COS, CS 2 exist in other forms. [0003] The commonly used methods for purifying yellow phosphorus tail ga...

Claims

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Application Information

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IPC IPC(8): H01F1/44B01D53/86B01D53/81C02F1/48C02F1/72C02F1/28
Inventor 瞿广飞胡博彩李军燕宁平裘伟霞
Owner KUNMING UNIV OF SCI & TECH
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