Method for applying ferrite MFe2O4 magnetic nano-particles to removal of tellurium-containing wastewater and application of ferrite MFe2O4 magnetic nano-particles

A magnetic nanoparticle, ferrite technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the difficulty of recovering tellurium, large area, large investment cost and operating cost, power consumption, etc. It can achieve the effect of large adsorption capacity, high removal efficiency and broad application prospects.

Active Publication Date: 2016-03-30
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has problems such as high investment cost and operating cost (large power consumption), large footprint, and difficulty in recovering the removed tellurium.

Method used

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  • Method for applying ferrite MFe2O4 magnetic nano-particles to removal of tellurium-containing wastewater and application of ferrite MFe2O4 magnetic nano-particles
  • Method for applying ferrite MFe2O4 magnetic nano-particles to removal of tellurium-containing wastewater and application of ferrite MFe2O4 magnetic nano-particles
  • Method for applying ferrite MFe2O4 magnetic nano-particles to removal of tellurium-containing wastewater and application of ferrite MFe2O4 magnetic nano-particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) The adsorbent ferromanganese oxide magnetic nanoparticles prepared above, with a dosage of 0.2g / L, is added to a reaction vessel with a concentration of tellurium-containing wastewater of 40mg / L, and the concentration of the wastewater is adjusted with sodium hydroxide or nitric acid. The pH value is 7±0.2;

[0033] 2) Under the condition of 25°C, vibrate the reaction vessel at a speed of 180rpm / min to fully mix the adsorbent and tellurium-containing wastewater, and the reaction time is 12h;

[0034] 3) After adsorption equilibrium, use a magnet to separate the ferromanganese oxides to obtain a clear liquid to be tested.

Embodiment 2

[0036]The method of Example 1 is used, except that the iron cuprite magnetic nanoparticles are used instead of the iron manganese oxide magnetic nanoparticles.

Embodiment 3

[0038] The method of Example 1 is used, except that the iron-cobalt oxide magnetic nanoparticles are used instead of the iron-manganese oxide magnetic nanoparticles.

[0039] In order to determine the effect of iron-cobalt oxide, iron-cuprite, and iron-manganese oxide on treating tellurium-containing wastewater, a series of experiments of simulating wastewater were carried out first. Since tellurate and tellurite are the main forms of tellurium in water, sodium tellurate and sodium tellurite are used to prepare tellurium-containing wastewater. The adsorbent was mixed with the simulated wastewater, put into the Erlenmeyer flask, oscillated in a constant temperature shaking incubator, and the mixed reaction was repeated. After the reaction, the mixed solution was separated by magnetic force, and the concentration of tellurium in the supernatant was determined by ICP-OES. The formula for calculating the adsorption capacity is as follows:

[0040] q e =(C 0 -C e )V / W

[0041]...

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Abstract

The invention relates to a method for applying ferrite MFe2O4 magnetic nano-particles to removal of tellurium-containing wastewater and an application of the ferrite MFe2O4 magnetic nano-particles. The method for applying the ferrite magnetic nano-particles to removal of the tellurium-containing wastewater is described in details in the description. Three types of the ferrite magnetic nano-particles of iron cobalt ferrite, iron copper ferrite and iron manganese ferrite are provided. The method provided by the invention has the advantages that: the ferrite magnetic nano-particles are large in specific area, high in adsorption capacity to tellurium and high in removal rate; the technology, when used for removing the tellurium-containing wastewater, is little influenced by coexisting anions of Cl, SO4<2>, CO3<2> and NO3 in the tellurium-containing wastewater; materials used in the technology are strong in magnetism, and can be easily separated from a water body in a short time for recycling by virtue of an external magnetic field after absorbing pollutants; and the desorbed tellurium can be recycled easily. According to the method, the treatment of the wastewater is finished, and the recycling of tellurium is realized at the same time, therefore, the ferrite magnetic nano-particles have a broad application prospect in removal of metal anions. The ferrite magnetic nano-particles provided by the invention are mainly applied to the removal of tellurium, including tellurate radical and tellurite radical ions in the tellurium-containing wastewater.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment in environmental engineering, in particular, relates to ferrite MFe 2 o 4 A method and use of magnetic nanoparticles for removing tellurium-containing wastewater. Background technique [0002] Tellurium is one of the semiconductor materials in the high-tech industry, known as "the vitamin of modern industry, national defense and cutting-edge technology". Because of its low abundance in the earth's crust, tellurium, selenium, rhenium, etc. are generally called "rare elements" or "scattered metals". Tellurium is mainly used in chemical industry, metallurgy, medicine, glass ceramics, national defense, energy and other fields; and with the increasing demand for new materials in various fields, tellurium as a scattered metal has become a supporting material for new materials required; in addition, tellurium is Non-essential and potentially toxic trace elements for the human body. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F1/28B01J20/06B01J20/30
CPCB01J20/06B01J2220/42B01J2220/4806C02F1/281C02F1/66C02F2101/10C02F2305/02C02F2305/04C02F2305/08
Inventor 孙卫玲潘伟一
Owner PEKING UNIV
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