CN106045152A

CN106045152A - Method for degrading rhodamine B through nanometer Fe3O4/Na2S2O8 jointly

Info

Publication number: CN106045152A
Application number: CN201610539957.2A
Authority: CN
Inventors: 潘新星; 王明新; 葛跃; 刘建国
Original assignee: Changzhou University
Current assignee: Changzhou University
Priority date: 2016-07-08
Filing date: 2016-07-08
Publication date: 2016-10-26

Abstract

The invention belongs to the field of advanced oxidation wastewater treatment engineering, and discloses a method for degrading rhodamine B through a nanometer Fe3O4/Na2S2O8 reaction system. The method includes the steps that under the certain pH condition, Na2S2O8 and nanometer Fe3O4 are added into rhodamine B wastewater, reaction is carried out at the normal temperature, and recycling is achieved through the magnetism of the nanometer Fe3O4. The decolorization ratio of the rhodamine B treated with the method reaches 85% to 90%. The method has the advantages that the technology condition is simple, the operation requirement is low, catalytic materials can be recycled, and the method can be widely applied to dye wastewater treatment.

Description

A kind of nanometer Fe3O4/Na2S2O8The method of combined degradation rhodamine B

Technical field

The invention belongs to advanced oxidation waste water treatment engineering field, be specifically related to one and utilize nano ferriferrous oxide (Fe₃O₄) and sodium peroxydisulfate (Na₂S₂O₈) method of combined degradation rhodamine B.

Background technology

In recent years, advanced oxidation technology based on persulfate is gradually applied to the process of waste water from dyestuff.With it Its oxidant is compared, and it has a lot of advantages: in solid state under room temperature, it is easy to stores and carries；High stability, Gao Shui Dissolubility, relative price is relatively low.But, under normal temperature condition, persulfate is more stable, needs to be penetrated by light, heat, electricity, microwave, γ The activation methods such as physical method or transition metal such as line decompose generation persulfate free radical and carry out degradable organic pollutant.Wang Zhongming Na is activated Deng by active carbon loading silver₂S₂O₈Degraded acid orange 7, under acid condition, degradation rate reaches more than 95%；Bai Xiaolong etc. pass through Thermal activation Na under acid condition₂S₂O₈Processing methylene blue waste water, degradation rate is up to more than 90%；Zuo Chuanmei uses bivalence ironwork Changing sodium peroxydisulfate and process reactive brilliant orange, degradation rate is up to 95.7%.

But, although the activation methods such as heat, ultraviolet light, microwave, gamma-rays can realize the activation of persulfate, but required Energy consumption is high；Noble metal then price is the most expensive；Ferrous iron is the efficient activator of activation persulfate, efficient, nontoxic, Non-energy-consumption, but The side reaction of ferrous iron and persulfuric acid silver will consume a large amount of persulfate, cause this system efficiency to reduce, and this reaction need to be < carrying out under the conditions of 3, this limits its range of application to pH the most to a certain extent.Therefore, high-performance activator activation over cure is selected Hydrochlorate, widens pH range of application, reduces the generation of generation persulfate side reaction, raising persulfate system oxidation efficiency and profit It is activation persulfate degradable organic pollutant key to be solved by rate.

The present invention, on the basis of applicant studies for many years, discloses one and utilizes nanometer Fe₃O₄Activation Na₂S₂O₈Degrade The method of rhodamine B, it is achieved that convenient, the efficient degradation of waste water from dyestuff.

Summary of the invention

The invention provides one and utilize nanometer Fe₃O₄/Na₂S₂O₈The method of system rhodamine B degradation, solves tradition work Long processing period, secondary pollution and be difficult to problems such as recycling in skill, have that process conditions are simple, operation require lowstand with And catalysis material such as can be recycled at the feature.Can be widely applied to printing, textile waste processes.

The present invention is that one utilizes nanometer Fe₃O₄/Na₂S₂O₈The method of system rhodamine B degradation, concrete technical scheme is such as Under: by controlling pH under certain condition, in rhodamine B, add Na₂S₂O₈And nanometer Fe₃O₄, shake in constant temperature under room temperature Swinging in device and vibrate, the rhodamine B percent of decolourization after process reaches more than 90%.Utilize nanometer Fe₃O₄Magnetic reclaimed circulation profit With.

In described waste water, the concentration of rhodamine B is 20～80mg/L.

Described pH is 3～4, the control hydrochloric acid of pH and sodium hydroxide regulation.

Described Na₂S₂O₈It is the Na of 30%₂S₂O₈, dosage is 600～800ml/L.

Described nanometer Fe₃O₄Particle diameter is 20～30nm, is shaped as spherical, and iron content is 99.5%, dosage be 600～ 800mg/L。

The temperature of described constant temperature oscillator is room temperature, and rotating speed is 180r/min.

Described degradation time is 3～4h.

In the present invention, Na₂S₂O₈Main Function be for oxidation reaction provide persulfate free radical.

In the present invention, nanometer Fe₃O₄Main Function be as Na₂S₂O₈Activator, due to its be nanoscale be catalyzed material Material, has the biggest specific surface area, its surface and Na₂S₂O₈After contact, catalysis produces a large amount of potentiometric titrations, thus improves Oxidation efficiency.

Beneficial effects of the present invention:

Na₂S₂O₈And nanometer Fe₃O₄The reaction system constituted, improves the degradation efficiency of waste water from dyestuff；Additionally, due to nanometer Na₂S₂O₈Itself has magnetic, can pass through Magnet recycle and reuse, significantly reduce processing cost；And relatively conventional work The ferrous iron activation Na of skill₂S₂O₈Reaction system, the present invention uses nanometer Fe₃O₄Activation Na₂S₂O₈Effectively reduce due to iron ion The secondary pollution existed and cause.

Detailed description of the invention

Below in conjunction with instantiation, the present invention is further illustrated, but embodiments of the present invention are not limited to this.

Embodiment 1 and example 2 utilize processing method of the present invention to process rhodamine B solution.Wherein, in waste water solution The rhodamine B of residual utilizes UV-VIS spectrophotometry quantitative analysis under 552nm wavelength.

Embodiment 1:

Configuration 100mL rhodamine B (20mg/L), with salt acid for adjusting pH to 3, adds 600mg/L nanometer in waste water Fe₃O₄And 600mg/LNa₂S₂O₈, vibrate under room temperature in the constant temperature oscillator of 180r/min 5h, and in waste water, rhodamine B is de- Color rate has reached 85.89%.After reaction terminates, Magnetic Isolation nanometer Fe₃O₄, in 400W ultrasonic cleaner after ultrasonic 10min With, recycle with desiccant dryness.

Embodiment 2:

Configuration 100mL rhodamine B (20mg/L), with salt acid for adjusting pH to 4, adds 600mg/L nanometer in waste water Fe₃O₄And 800mg/LNa₂S₂O₈, vibrate under room temperature in the constant temperature oscillator of 180r/min 5h, and in waste water, rhodamine B is de- Color rate has reached 90.15%.After reaction terminates, Magnetic Isolation nanometer Fe₃O₄, in 400W ultrasonic cleaner after ultrasonic 10min With, recycle with desiccant dryness.

Interpretation of result: test finds, under conditions of control pH is 4, individually adds 800mg/L Na₂S₂O₈, react 5h After, its percent of decolourization is only 76.18%；And individually add 600mg/L nanometer Fe₃O₄, after reaction 5h, its percent of decolourization is only 49.56%；Na₂S₂O₈With nanometer Fe₃O₄After compound reaction 5h, its percent of decolourization is up to 90.15%, and this shows Na₂S₂O₈With nanometer Fe₃O₄Between have significant synergism.

To sum up, this example is implemented to show, Na₂S₂O₈With nanometer Fe₃O₄For degradation of dye waste water, there is good collaborative work With, simultaneously because nanometer Fe₃O₄The magnetic being had, it is achieved that the recycling of catalysis material itself, it also avoid due to waste water The existence of middle iron ion and the secondary pollution that brings, it is achieved that convenient, low-cost environment-friendly processes technique.

Claims

1. a nanometer Fe₃O₄/Na₂S₂O₈The method of combined degradation rhodamine B, it is characterised in that comprise the following steps: first use Hydrochloric acid and sodium hydroxide control the pH of waste water under certain condition, add sodium peroxydisulfate and nanometer four oxygen in rhodamine B Change three-iron, in constant temperature oscillator, carry out decoloring reaction, utilize the magnetic of nano ferriferrous oxide itself that it is recycled.

Method the most according to claim 1, it is characterised in that in described waste water, the concentration of rhodamine B is 20～80mg/L.

Method the most according to claim 1, it is characterised in that described pH is 3～4.

Method the most according to claim 1, it is characterised in that described sodium peroxydisulfate dosage is 600～800mg/L.

Method the most according to claim 1, it is characterised in that described nano ferriferrous oxide particle diameter is 20～30nm, shape Shape is spherical, and ferroso-ferric oxide content is 99.5%, and dosage is 600～800mg/L.

Method the most according to claim 1, it is characterised in that the temperature of described constant temperature oscillator is room temperature, rotating speed is 180r/min。

Method the most according to claim 1, it is characterised in that the magnetic nano ferroferric oxide for catalysis can circulate Utilize, can be applicable to printing and dyeing, textile waste process.