CN106045151A

CN106045151A - Method for degrading rhodamine B through nanometer Fe3O4/H2O2 synergistically

Info

Publication number: CN106045151A
Application number: CN201610536523.7A
Authority: CN
Inventors: 潘新星; 王明新; 姚静波; 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 Fe3O4/H2O2 heterogeneous fenton reaction system. The method includes the steps that under the certain pH condition, H2O2 and nanometer Fe3O4 are added into rhodamine B wastewater, reaction is carried out at the normal temperature, and the recycling is achieved through the magnetism of the nanometer Fe3O4. The decolorization ratio of the rhodamine B treated with the method reaches 90% or above. 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 dyeing and textile wastewater treatment.

Description

A kind of nanometer Fe3O4/H2O2The method of Synergistic degradation rhodamine B

Technical field

The invention belongs to advanced oxidation waste water treatment engineering field, be specifically related to one and utilize nanometer Fe₃O₄Associating H₂O₂Association Method with rhodamine B degradation.

Background technology

Rhodamine B (Rhodamine B, RhB), also known as rose-red, is that one is widely used in weaving, printing and organic glass The dyestuff of the industries such as glass, under this waste water from dyestuff low concentration, its colourity is the highest, if without processing directly discharge, then can contaminant water Body environment, endangers mankind's drinking water safety.

At present conventional inside dye industry processing method specifically includes that ozone high grade oxidation, anaerobic treatment, anaerobism-good Oxygen process and biomembrance process etc., these method techniques are complex, the shortcoming such as long processing period and instability.Fenton's reaction It is hydrogen peroxide and known organic compound (carboxylic acid, alcohol and esters) is oxidized to inorganic states by the mixed solution of ferrous ion, Treatment of dyeing wastewater is commonly employed.But traditional homogeneous Fenton's reaction is after having processed waste water, due to ferrum from Son makes solution present certain color, causes secondary pollution；Additionally, the source of iron of catalytic reaction is difficult to recycle the most substantially, improve Processing cost.Based on problem above, many researchers propose employing nano zero valence iron and hydrogen peroxide composition in recent years Heterogeneous class Fenton's reaction system carry out degradation of dye waste water, the most effective, be one be worth research direction.

The present invention, on the basis of applicant studies for many years, discloses one and utilizes Fe₃O₄/H₂O₂Heterogeneous class Fenton is anti- The method answering system rhodamine B degradation, it is achieved that convenient, efficient degradation waste water from dyestuff.

Summary of the invention

The invention provides one and utilize Fe₃O₄/H₂O₂The method of heterogeneous class Fenton's reaction system rhodamine B degradation, solves Long processing period, secondary pollution and be difficult to problems such as recycling in traditional handicraft of having determined, have that process conditions are simple, operation Require the features such as lowstand and catalysis material can be recycled.Can be widely applied to printing, textile waste processes.

The present invention is that one utilizes Fe₃O₄/H₂O₂The method of heterogeneous class Fenton's reaction system rhodamine B degradation, concrete skill Art scheme is as follows: by controlling pH under certain condition, add hydrogen peroxide and nanometer four aoxidizes three in rhodamine B Ferrum, vibrates under room temperature in constant temperature oscillator, and the rhodamine B percent of decolourization after process reaches more than 90%.Utilize nanometer four oxidation The magnetic of three-iron is by its recycle and reuse.

In described waste water, the concentration of rhodamine B is 20～60mg/L.

Described pH is 2～3, the control hydrochloric acid of pH and sodium hydroxide regulation.

Described hydrogen peroxide is the hydrogen peroxide of 30%, and dosage is 300～400ml/L.

Described nano ferriferrous oxide particle diameter is 20～30nm, is shaped as spherical, and ferroso-ferric oxide content is 99.5%, Dosage is 300～400mg/L.

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

Described degradation time is 2～3h.

In the present invention, the Main Function of hydrogen peroxide is to provide superoxide radical and hydroxyl radical free radical for oxidation reaction.

In the present invention, the Main Function of nano ferriferrous oxide is the catalyst as heterogeneous class Fenton's reaction, due to It is Nanometer grade catalysis material, has the biggest specific surface area, and after its surface contacts with hydrogen peroxide, catalysis produces great amount of hydroxy group Free radical, thus improve oxidation efficiency.

Beneficial effects of the present invention:

The heterogeneous class Fenton's reaction that hydrogen peroxide and nano ferriferrous oxide are constituted, significantly improves the fall of waste water from dyestuff Solve efficiency；Additionally, due to nano ferriferrous oxide itself has magnetic, Magnet recycle and reuse can be passed through, greatly drop Low processing cost；And the homogeneous Fenton's reaction of relatively conventional technique, this heterogeneous Fenton's reaction of the present invention effectively subtracts Lack the secondary pollution caused owing to iron ion exists.

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, containing 350ml/L 30% hydrogen peroxide), with salt acid for adjusting pH to 3, Adding 400mg/L nano ferriferrous oxide in waste water, vibrate under room temperature in the constant temperature oscillator of 180r/min 2h, waste water The percent of decolourization of middle rhodamine B has reached 96.11%.After reaction terminates, Magnetic Isolation nano ferriferrous oxide, ultrasonic clearly in 400W Wash in device use after ultrasonic 10min, recycle with desiccant dryness.

Embodiment 2:

Configuration 100mL rhodamine B (20mg/L, containing 350ml/L 30% hydrogen peroxide), with salt acid for adjusting pH to 2, Adding 300mg/L nano ferriferrous oxide in waste water, vibrate under room temperature in the constant temperature oscillator of 180r/min 2h, waste water The percent of decolourization of middle rhodamine B has reached 91.18%.After reaction terminates, Magnetic Isolation nano ferriferrous oxide, ultrasonic clearly in 400W Wash in device use after ultrasonic 10min, recycle with desiccant dryness.

Interpretation of result: test finds, under conditions of control pH is 2, individually adds hydrogen peroxide, and after reaction 2h, it takes off Color rate is only 59.53%；And individually adding nano ferriferrous oxide, after reaction 2h, its percent of decolourization is only 51.22%；Peroxidating After hydrogen and nano ferriferrous oxide compound reaction 2h, its percent of decolourization is up to 91.18%, and this shows hydrogen peroxide and nanometer four oxidation Significant coupling is had between three-iron.

To sum up, this example is implemented to show, hydrogen peroxide and nano ferriferrous oxide have well for degradation of dye waste water Coupling, simultaneously because the magnetic that nano ferriferrous oxide itself is had, it is achieved that the recycling of catalysis material, also Avoid due to the existence of iron ion and the secondary pollution that brings in waste water, it is achieved that convenient, low-cost environment-friendly processes technique.

Claims

1. a nanometer Fe₃O₄/H₂O₂The method of Synergistic degradation rhodamine B, it is characterised in that comprise the following steps: first use hydrochloric acid Control the pH of waste water under certain condition with sodium hydroxide, in rhodamine B, add hydrogen peroxide and nanometer four aoxidizes three Ferrum, carries out decoloring reaction in constant temperature oscillator, utilizes the magnetic of nano ferriferrous oxide itself to recycle it.

Method the most according to claim 1, it is characterised in that in described waste water, the concentration of rhodamine B is 20～60mg/L.

Method the most according to claim 1, it is characterised in that described pH is 2～3.

Method the most according to claim 1, it is characterised in that described 30% hydrogen peroxide dosage is 300～400ml/ 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 300～400mg/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.