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Preparation and application of novel wastewater treatment agent, ZnFe2O4/TiO2 compound

A wastewater treatment agent, znfe2o4 technology, applied in textile industry wastewater treatment, light water/sewage treatment, magnetic field/electric field water/sewage treatment, etc., can solve the problems of small adsorption capacity, high density, limitations, etc., and achieve simple process, The effect of continuous separation and recovery

Inactive Publication Date: 2014-07-30
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite has strong magnetism and is easy to separate and recycle, but its application in the environmental field is limited due to its disadvantages such as high density and small adsorption capacity.

Method used

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  • Preparation and application of novel wastewater treatment agent, ZnFe2O4/TiO2 compound
  • Preparation and application of novel wastewater treatment agent, ZnFe2O4/TiO2 compound
  • Preparation and application of novel wastewater treatment agent, ZnFe2O4/TiO2 compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: omega TiO2 9.09% ZnFe 2 o 4 / TiO 2 Compound (treatment agent)

[0029] A. Preparation of treatment agent

[0030] (1) Weigh a certain amount of glucose and dissolve it in an appropriate amount of distilled water to obtain carbon microspheres according to step (1).

[0031] (2) Accurately weigh 0.8077~2.4231gFe(NO 3 ) 3 9H 2 O and 0.2974~0.8922gZn(NO 3 ) 2 ·6H 2 O, dissolve with 25-75mL ethanol-water solution (volume ratio of ethanol and water is 2:1), add 0.3-1.0g urea and 0.1-0.4g carbon microspheres to it, and process according to step (2) to obtain hollow ZnFe 2 o 4 powder.

[0032] (3) Accurately weigh 1.4465g hollow ZnFe 2 o 4 Powder, join in the microemulsion system that is made up of 2.4gCTAB, 25mL cyclohexane, 3.0mL amyl alcohol, process by step (3) to obtain mixed solution A; Weigh and ω TiO2 =9.09% equivalent Ti(OBu) 4 Dissolve 0.6153g in 50mL alcohol aqueous solution (volume ratio of alcohol to water is 2:1) to obtain solution B; slow...

Embodiment 2

[0039] Example 2: ω TiO2 16.67% ZnFe 2 o 4 / TiO 2 Compound preparation (treatment agent)

[0040] A. Preparation of treatment agent

[0041] (1) Prepare carbon microspheres according to step (1).

[0042] (2) prepare hollow ZnFe according to step (2) 2 o 4 powder.

[0043] (3) Accurately weigh 1.4465g hollow ZnFe 2 o 4 Powder, join in the microemulsion system that is made up of 2.4gCTAB, 25mL cyclohexane, 3.0mL amyl alcohol, process by step (3) to obtain mixed solution A; Weigh and ω TiO2 =16.67% equivalent Ti(OBu) 4 1. Dissolve 1.0259g in 50mL alcohol aqueous solution (volume ratio of alcohol to water is 2:1) to obtain solution B; slowly add solution B to mixed solution A, and process according to step (3) to obtain ω TiO2 = 16.67% ZnFe 2 o 4 / TiO 2 Complex.

[0044] B. Application of treatment agent

[0045] (1) Add 50mgω TiO2 = 16.67% ZnFe 2 o 4 / TiO 2 Add the complex to 50mL methyl orange solution with a concentration of 50mg / L, control the pH to about ...

Embodiment 3

[0050] Example 3: ω TiO2 25% ZnFe 2 o 4 / TiO 2 Compound preparation (treatment agent)

[0051] A. Preparation of treatment agent

[0052] (1) Prepare carbon microspheres according to step (1).

[0053] (2) prepare hollow ZnFe according to step (2) 2 o 4 powder.

[0054] (3) Accurately weigh 1.4465g hollow ZnFe 2 o 4 Powder, join in the microemulsion system that is made up of 2.4gCTAB, 25mL cyclohexane, 3.0mL amyl alcohol, process by step (3) to obtain mixed solution A; Weigh and ω TiO2 = 25% equivalent Ti(OBu) 4 1.5387g was dissolved in 50mL alcohol aqueous solution (volume ratio of alcohol to water: 2:1) to obtain solution B; slowly add solution B to mixed solution A, and process according to step (3) to obtain ω TiO2 = 25% ZnFe 2 o 4 / TiO 2 Complex.

[0055] B. Application of treatment agent

[0056] (1) Add 50mgω TiO2 = 25% ZnFe 2 o 4 / TiO 2 Add the complex to 50mL methyl orange solution with a concentration of 50mg / L, control the pH to about 4.0, ultras...

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PUM

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Abstract

The invention belongs to the technical fields of magnetic materials and wastewater treatment, and particularly relates to a preparation method of a group of magnetically separable wastewater treatment agent, namely a zinc ferrite / titanium dioxide (ZnFe2O4 / TiO2) compound, and a process for processing wastewater by the compound. The method comprises the following steps: dispersing a template of carbon microspheres prepared from glucose into a mixed solution of a zinc salt and a ferric salt with certain concentration; refluxing, stirring, aging and drying at constant temperature to obtain a dark brown solid; carrying out high-temperature calcination to obtain hollow ZnFe2O4 powder; hydrolyzing Ti(OBu)4 under a certain condition to generate TiO2 coating the surface of hollow ZnFe2O4; sintering at high temperature to obtain the ZnFe2O4 / TiO2 compound with different TiO2 mass fractions (omega TiO2). The treatment agent is directly prepared by an ultrasonic-precipitation-hydrolysis-high temperature calcination technology. Compared with a traditional process for preparing a compound material by a calcination technology, the process provided by the invention is simpler, and has a better energy-saving effect; the prepared wastewater treatment agent can be conveniently recovered, activated, regenerated and recycled, and has the advantages of having a time-saving effect and being safe, efficient, cheap and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, photocatalytic materials and wastewater treatment, and specifically refers to a magnetically separable wastewater treatment agent—ZnFe 2 o 4 / TiO 2 Preparation and application of complexes. Background technique [0002] With the rapid development of social economy, the problem of environmental pollution has increasingly become the focus of social attention. Among them, the pollution of dye wastewater (mainly from dye production, printing and dyeing and printing industries) to the water environment is particularly prominent. The most effective way to solve this kind of pollution problem is to develop products that absorb and photocatalyze the degradation of organic matter (dye). However, it is a difficult and challenging task to develop photocatalysts with high efficiency, low energy consumption, good stability, simple operation, and easy recycling. [0003] Nanostructured semicondu...

Claims

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Application Information

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IPC IPC(8): B01J23/80C02F1/30C02F1/48C02F103/30
Inventor 李良超沈俊海肖秋实刘铮军陈海峰
Owner ZHEJIANG NORMAL UNIVERSITY
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