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Method for degrading antibiotic pharmaceutical wastewater

A technology for pharmaceutical wastewater and antibiotics, applied in natural water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex preparation process of boron-doped diamond electrodes, high price of platinum electrodes, low current efficiency, etc. Effects of high oxygen evolution potential and electrochemical stability, reduced crystal size, and improved catalytic activity

Inactive Publication Date: 2016-06-01
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Platinum electrodes are expensive, and the oxygen evolution potential is low, and most of the current is consumed in the process of generating oxygen, resulting in low current efficiency; graphite electrodes are cheap, but also have low oxygen evolution potential; ruthenium dioxide and iridium dioxide electrodes have low oxygen evolution potential The oxidation performance is weak; the tin dioxide electrode has an obvious defect: the electrode life is too short; the preparation process of the boron-doped diamond electrode is complicated and the cost is high, especially for large-scale production
[0004] Studies on lead dioxide electrodes have shown that although these improved lead dioxide electrodes have strong stability and electrocatalysis, the catalytic activity and current efficiency of the electrodes still need to be further improved.

Method used

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  • Method for degrading antibiotic pharmaceutical wastewater
  • Method for degrading antibiotic pharmaceutical wastewater
  • Method for degrading antibiotic pharmaceutical wastewater

Examples

Experimental program
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Embodiment 1

[0041] A method for preparing an aluminum-doped lead dioxide electrode. The aluminum-doped lead dioxide electrode uses titanium as a matrix, and the titanium matrix is ​​a titanium sheet. The titanium sheet is pretreated by grinding, alkali cleaning, degreasing, pickling and etching. The pretreated titanium substrate is prepared by brushing and pyrolysis to prepare the bottom layer of tin antimony oxide, and then the electrodeposition method is used in the prepared electroplating solution. α-PbO 2 Intermediate layer and fluorine-containing β-PbO doped with a certain amount of Al 2 active layer.

[0042] The concrete steps of described method are as follows:

[0043] (1) Titanium substrate pretreatment: the thickness is 0.1mm, the size is 14cm 2 (7cm×2cm) pure titanium sheet was polished with 120-mesh, 600-mesh and 1200-mesh sandpaper in turn until the titanium substrate showed a silvery-white metallic luster, and was rinsed with deionized water; the polished and cleaned tit...

Embodiment 2

[0053] The prepared Al-doped lead dioxide electrode was used to electrocatalyze the oxidation degradation of chloramphenicol.

[0054] The prepared Al-doped lead dioxide electrode or undoped lead dioxide electrode is used as the anode, and the titanium sheet is used as the cathode, and the electrode area is 14cm 2 , electrochemical degradation using constant current electrolysis. The constant current density is 50mAcm -2 , The electrode spacing is 4cm. to contain 0.1molL -1 Electrolyte Na 2 SO 4 500mgL -1 Chloramphenicol is a simulated wastewater with a reaction volume of 250mL. Under the action of magnetic stirring, the wastewater is treated, and samples are taken for analysis at different times during the degradation reaction. The changing situation of the concentration of chloramphenicol at different times is measured by HPLC, and the changing situation of total organic carbon content (TOC) is measured by a TOC measuring instrument. The experimental results are shown ...

Embodiment 3

[0057] The prepared Al-doped lead dioxide electrode was used to electrocatalyze the oxidation degradation of levofloxacin.

[0058] The prepared Al-doped lead dioxide electrode or undoped lead dioxide electrode is used as the anode, and the titanium sheet is used as the cathode, and the electrode area is 14cm 2 , electrochemical degradation using constant current electrolysis. The constant current density is 50mAcm -2 , The electrode spacing is 4cm. to contain 0.1molL -1 Electrolyte Na 2 SO 4 500mgL -1 The levofloxacin is a simulated wastewater with a reaction volume of 250mL. Under the action of magnetic stirring, the wastewater is treated, and samples are taken for analysis at different times during the degradation reaction. The change of the concentration of levofloxacin at different times is measured by HPLC, and the change of total organic carbon content (TOC) is measured by a TOC analyzer. The experimental results are shown in Figure 6 . Figure 6 Al doped PbO ...

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Abstract

The invention discloses a method for degrading antibiotic pharmaceutical wastewater. According to the method, an aluminum-doped titanium-based lead dioxide electrode serves as an anode, a titanium plate serves as a cathode, and the antibiotic pharmaceutical wastewater is degraded by adopting a constant-current electrolysis method. The aluminum-doped titanium-based lead dioxide electrode for degrading the antibiotic pharmaceutical wastewater takes titanium as a matrix, and the titanium matrix is coated with an antimony-tin oxide bottom layer, an alpha-PbO2 intermediate layer and an Al-doped fluorinated beta-PbO2 active layer sequentially from inside to outside. According to the method, the prepared Al-doped lead dioxide electrode has the characteristics of high oxygen evolution potential, high catalytic activity, good recyclability and safety performance, and the like. During the treatment of high-concentration poorly-biodegradable antibiotic pharmaceutical wastewater, the rapid removal and efficient mineralization of pollutants can be realized. The electrode is simple in preparation process and low in preparation cost and has extensive economic and social benefits.

Description

(1) Technical field [0001] The invention relates to a technical method for electrochemical degradation of antibiotic pharmaceutical wastewater, belonging to the technical fields of electrochemical technology and environmental protection wastewater treatment. (2) Background technology [0002] With the rapid development of society, the number and types of refractory organic compounds in industrial wastewater are increasing day by day. These toxic and harmful high-concentration refractory organic wastewater pose great challenges to traditional biological treatment methods. Among them, antibiotic pharmaceutical wastewater is more typical. This type of wastewater has complex components and is difficult to degrade. It is a difficulty and hot spot in water treatment at home and abroad. Therefore, in order to meet increasingly stringent wastewater discharge standards, it is urgent to develop new sewage purification treatment technologies with good reliability, high effect and low c...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F103/34C02F101/30
CPCC02F1/46109C02F2001/46142C02F2101/305C02F2103/343C02F2201/46105
Inventor 陈建孟戴启洲夏伊静
Owner ZHEJIANG UNIV OF TECH
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