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A kind of nano-ce0 doped fe0 composite material and its preparation and application method

A composite material and nanotechnology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., to achieve the effect of simple process, low equipment requirements and low cost

Active Publication Date: 2018-05-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, with zero-valent cerium (Ce 0 ) doped with nanometer zero-valent iron (Fe 0 ) is used for the catalyst of class Fenton reaction and has not been reported

Method used

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  • A kind of nano-ce0 doped fe0 composite material and its preparation and application method

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Experimental program
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Effect test

Embodiment 1

[0038] Synthesis of Nano-Ce by Co-precipitation Method 0 Doped with Fe 0 Particle catalyst, the steps are as follows: add FeSO with a concentration of 0.02M in a four-neck round bottom flask 4 ·7H 2 O and 0.001M Ce(NO 3 ) 3 ·6H 2 O solution 50mL, stirred and passed through argon to make it in an oxygen-free state, to obtain a mixed solution of iron and cerium ions.

[0039] KBH at a concentration of 0.08M 4 250mL of the solution was dropped into a four-necked round-bottomed flask through a regulating valve, so that the above-mentioned mixed solution of iron and cerium ions reacted to form nano-iron particles and nano-cerium particles; during the reaction, argon gas was blown in to keep the reaction in an oxygen-free state, and aeration produced The micro-bubbles in the solution act as the attachment nucleus of the nano-iron particles and nano-cerium particles, and prevent the agglomeration of the nanoparticles, and keep stirring to keep the solution in a uniformly mixed ...

Embodiment 2

[0044] Nano-Ce 0 Doped with Fe 0 The preparation method of the composite material is the same as in Example 1.

[0045] Nano-Ce doped Fe 0 The composite material is a catalyst for the treatment of sulfamethazine wastewater. The initial concentration of the wastewater is 20 mg / L, pH=7, and 0.5g / L nano Ce 0 Doped with Fe 0 For the composite material, the reactor was placed in a water bath shaker with a rotation speed of 150 rpm and a temperature of 40°C.

[0046] Detection method: with embodiment 1.

[0047] Nano-Ce doped Fe 0 After treating the sulfamethazine wastewater, after 30 minutes of reaction, the conversion rate of sulfamethazine and the TOC removal rate were 84.23% and 20%, respectively.

Embodiment 3

[0049] Nano-Ce 0 Doped with Fe 0 The preparation method of the composite material is the same as in Example 1.

[0050] Nano-Ce doped Fe 0 The composite material is a catalyst for the treatment of sulfamethazine wastewater. The initial concentration of the wastewater is 20mg / L, the pH is adjusted to 5, and 0.5g / L nanometer Ce is added to dope Fe 0 Compound, the reactor was placed in a water bath shaker with a rotation speed of 150 rpm and a temperature of 30°C.

[0051] Detection method: with embodiment 1.

[0052] Nano-Ce 0 Doped with Fe 0 The composite material can quickly and effectively remove sulfamethazine in wastewater. After 3 minutes of reaction, the conversion rate of sulfamethazine is as high as 78.4%, and the conversion rate of 5 minutes is 100%. The final TOC removal rate is 31%. Control group zero valent iron Fe 0 The conversion rates of sulfamethazine in 3min and 5min were 50.9% and 70% respectively.

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Abstract

The invention belongs to the field of material preparation and environmental technology, and specifically relates to a nano-Ce0 doped Fe0 composite material and a preparation and application method. The preparation method is as follows: using the co-precipitation method of iron salt and cerium salt to synthesize nano-Ce0 doped Fe0 composite material. The application method is: using nano-Ce0 doped Fe0 composite material as a catalyst, react with toxic and harmful pollutants that are difficult to biodegrade in wastewater in the presence of H2O2, and remove the pollutants. The preparation method of the present invention has simple process, low equipment requirements and low cost; when treating toxic and harmful pollutants that are difficult to biodegrade in wastewater, it is efficient, fast, economically feasible, and has no secondary pollution, and has broad application prospects in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the field of material preparation and environmental technology, in particular to a nano Ce 0 Doped with Fe 0 Composite materials and methods of preparation and application. Background technique [0002] With the improvement of the global scientific and technological level and the rapid development of animal husbandry and aquaculture, more than a dozen micro-polluting organic compounds have been detected in water bodies, such as pharmaceuticals and personal care products (PPCPs), endocrine disruptors (EDCs), etc. Organoids are low in concentration, have strong biological activity and slow biodegradation, and can produce "three-cause" effects, namely carcinogenic, teratogenic, and mutagenic types, which pose potential dangers to human health. Although some trace organic pollutants can be removed by traditional treatment methods, such as adsorption, flocculation, precipitation, biological methods, some toxic substances will be f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/72
CPCC02F1/722C02F1/725B01J23/83B01J35/392B01J35/23
Inventor 王建龙万众
Owner TSINGHUA UNIV
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