Method for treating dye wastewater by catalyzing biological electro-fenton through iron ore

A technology for dye wastewater and iron ore, applied in biological water/sewage treatment, chemical instruments and methods, textile industry wastewater treatment, etc. Responsive and easy to make

Inactive Publication Date: 2013-10-23
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The ordinary Fenton method can destroy organic matter under dark conditions, but there are two main disadvantages: one is that the mineralization of organic matter is not sufficient, and the initial organic matter is partially converted into some intermediate products, which are combined with Fe 3+ Form complexes, or compete with the generati...

Method used

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  • Method for treating dye wastewater by catalyzing biological electro-fenton through iron ore
  • Method for treating dye wastewater by catalyzing biological electro-fenton through iron ore
  • Method for treating dye wastewater by catalyzing biological electro-fenton through iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0031] (1) System construction.

[0032] In this experiment, a double-chamber plexiglass reactor was used, such as figure 1 shown. Anode chamber 1 (5.5cm×5.5cm×5cm) and cathode chamber 2 (2.5cm×5.5cm×5cm) are separated by proton exchange membrane 3 . The anode chamber is provided with a water inlet and outlet 6 which can be opened and closed for adding and removing sewage; the upper end of the cathode chamber is open. The anode 4 is made of carbon felt (6 pieces, each 5.5cm×5cm×0.3cm, fastened with titanium wire and graphite rod to form a whole with good conductivity), and the cathode 5 is also made of carbon felt (5.5cm×5cm×0.4 cm, without any modification, made by boiling with 1M sulfuric acid for one hour to remove surface impurities), using titanium wire (diameter 0.5mm) to tightly bond and fix the two electrodes and lead out the two electrode chambers respectively, and connect them through the variable resistor 7. Both ends of the variable resistor 7 are connected with...

Embodiment example 2

[0042] (1) and (2) are the same as implementation case 1.

[0043] (3) Using magnetite fine powder as the cathodic electro-Fenton catalyst, a bioelectric-Fenton system was constructed to treat simulated dye wastewater.

[0044] Add magnetite concentrate powder (purchased from China Tiger Trading Group Co., Ltd., particle size is 100 mesh) to the catholyte of a bioelectrochemical reactor with stable operation, so that the total amount of iron added is 1g / L . Connect the circuit with an external load of 1000Ω, introduce the cathode simulated dye wastewater and adjust the pH to 2.0±0.1, sample the catholyte every 30 minutes, and detect the absorbance at 484nm. The reaction results are as follows Figure 5 . Depend on Figure 5 It can be seen that it takes 3.5 hours for the bioelectric Fenton constructed with magnetite fine powder to achieve more than 98% of Orange II decolorization.

Embodiment example 3

[0046] (1) and (2) are the same as implementation case 1.

[0047] (3) Using hematite fine powder as the cathodic electro-Fenton catalyst, a bioelectric-Fenton system was constructed to treat simulated dye wastewater.

[0048] Add hematite concentrate powder (purchased from China Tiger Trading Group Co., Ltd., particle size is 100 mesh) in the catholyte of a bioelectrochemical reactor with stable operation, so that the total iron amount added is 1g / L . Connect the circuit with an external load of 1000Ω, introduce the cathode simulated dye wastewater and adjust the pH to 2.0±0.1, sample the catholyte every 30 minutes, and detect the absorbance at 484nm. The reaction results are as follows Figure 6 . Depend on Figure 6 It can be seen that it takes 5 hours for the bioelectric Fenton constructed with magnetite fine powder to achieve more than 98% of Orange II decolorization.

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Abstract

The invention provides a method for treating dye wastewater by catalyzing biological electro-fenton through iron ore, and belongs to the field of water treatment processes. The method is characterized in that natural iron ore fine powder is adopted as a reaction catalytic substance, and hydrogen peroxide and reduced iron ions generated in cathode through a bioelectrochemistry system are adopted as ferrous ions to realize a fenton reaction as well as realize the oxidation treatment on dye wastewater. According to the method, the electro-fenton in the cathode of the bioelectrochemistry system does not needs hydrogen peroxide; and the natural iron ore fine powder is a natural raw material which is low in price and easy to obtain. The method shows a great effect on treating the dye wastewater, and realizes the treatment to the high-concentration degradable organic wastewater in an anode chamber and the treatment to nonbiodegradable wastewater in a cathode chamber at the same time.

Description

technical field [0001] The invention relates to the field of water treatment technology, in particular to the application of a bioelectrochemical system and the improvement of a Fenton-like system. Background technique [0002] In 1894, French scientist H.J.H.Fenton discovered that under acidic conditions, hydrogen peroxide can 2+ Under the action of ion catalysis, tartaric acid can be strongly and effectively oxidized. This reaction was later called the Fenton reaction. In 1964, Canadian scholar H.R. Eisenhaner first used Fenton reagent to treat phenol and alkylbenzene wastewater successfully. Fenton method began to be applied in the removal of refractory organic pollutants in water because of its simple operation process, fast reaction speed, and environmental friendliness. It has always been favored by people because of its advantages. [0003] It is generally believed that the Fenton reaction can produce a strong oxidation ability because the H 2 o 2 By Fe 2+ Cataly...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F103/30
Inventor 陶虎春丁辉
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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