Graphene-magnetite conductive skeleton electrode and preparation method and application thereof, and method for treating petrochemical wastewater

A graphene and magnetite technology, which is applied in the treatment of petrochemical wastewater, graphene-magnetite conductive framework electrodes and their preparation fields, can solve problems such as low electron transfer efficiency restricting practical applications, and achieves favorable electron transfer, The effect of improving the transmission capacity and the transmission distance of electrons

Active Publication Date: 2021-10-08
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low bacterial load on the electrodes and the low electron transfer efficiency betw

Method used

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  • Graphene-magnetite conductive skeleton electrode and preparation method and application thereof, and method for treating petrochemical wastewater
  • Graphene-magnetite conductive skeleton electrode and preparation method and application thereof, and method for treating petrochemical wastewater
  • Graphene-magnetite conductive skeleton electrode and preparation method and application thereof, and method for treating petrochemical wastewater

Examples

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Example Embodiment

[0030] The invention provides a kind of preparation method of graphene-magnetite conductive framework electrode, comprises the following steps:

[0031] Mix the soluble iron salt solution with a pH value of 6.5 to 7.5, the culture medium and graphene, and after blowing nitrogen, add Geobacter sulfurreducens bacteria, carry out the reduction reaction of soluble iron salt, and centrifuge to obtain graphene-magnetite-Geobacter sulfurreducens bacteria;

[0032] After the graphene-magnetite-Geobacter sulfurreducens thallus and Nafion solution are mixed, the obtained suspension is coated on the surface of a graphite rod electrode to obtain the graphene-magnetite conductive skeleton electrode.

[0033] In the present invention, unless otherwise specified, all preparation materials are commercially available products well known to those skilled in the art.

[0034] The present invention mixes a soluble iron salt solution with a pH value of 6.5 to 7.5, a culture medium and graphene, a...

Example Embodiment

[0077] Example 1

[0078] Mix 100mL of deionized water, 1.3mL of concentrated sulfuric acid with a mass concentration of 98%, and 1.0mL of a KOH solution with a mass concentration of 30% to obtain an electrolyte;

[0079] In an electrochemical reactor with a diameter of 5 cm and a height of 5 cm, the graphite sheet is used as the working electrode, and the platinum sheet is used as the counter electrode to perform electrolysis in the electrolyte. V voltage for 3min, +10V voltage for 10min, -10V voltage for 5min, +10V voltage for 15min, centrifugation at 10,000rpm for 15min, deionized water for centrifugal washing of the centrifuged sediment 5 times, and drying to obtain Graphene;

[0080] Adopting NaOH to adjust 1L concentration is the pH value of the ferric chloride solution of 50mmol / L to 7.0, obtains the ferric chloride solution that the pH value is 6.0;

[0081] 5mL vitamin solution (including 0.2g / L biotin, 1g / L vitamin B6, 0.5g / L vitamin B1, 0.5g / L pantothenic acid, 0....

Example

[0088] Embodiment 2~6

[0089] Preparation process with reference to Example 1, the difference is only in the condition parameters shown in Table 2:

[0090] The processing parameter of table 2 embodiment 2~6

[0091] condition parameter Example 2 Example 3 Example 4 Example 5 Example 6 Mass concentration of concentrated sulfuric acid 1.0% 1.1% 1.2% 1.4% 1.5% KOH solution 0.5mL 0.7mL 0.9mL 1.1mL 1.3mL Nafion solution mass concentration 0.3% 0.4% 0.6% 0.8% 1.0% +2.5V application time 1min 2min 3min 3min 3min +10V application time (first time) 5min 6min 7min 8min 9min -10V application time 3min 4min 4min 3min 4min +10V application time (second time) 12min 13min 14min 13min 14min Washing times 3 4 4 3 4

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Abstract

The invention relates to the technical field of microbial electrochemistry, in particular to a graphene-magnetite conductive skeleton electrode and a preparation method and application thereof, and a method for treating petrochemical wastewater. According to the invention, the surface of a graphite rod electrode is modified with a conductive framework, so the roughness of the surface of the graphite rod electrode can be increased, enrichment of microorganisms is facilitated, the quantity of electroactive microorganisms can be increased along with increase of the loading capacity of the microorganisms, and then electron transmission capacity can be further improved; since a modification layer is made of a conductive material, so electron transfer is facilitated; and meanwhile, the conductive framework is modified on the surface of the graphite rod electrode, and the transmission distance of electrons can be further increased due to the constructed framework.

Description

technical field [0001] The invention relates to the technical field of microbial electrochemistry, in particular to a graphene-magnetite conductive framework electrode, a preparation method and application thereof, and a method for treating petrochemical wastewater. Background technique [0002] Petroleum is called "the blood of industry", and petrochemical products have been widely used in various aspects of economic construction. However, due to the limitations of the petrochemical industry's process level and treatment technology, a large amount of petrochemical industry wastewater will inevitably be discharged into the ecological water environment. The petrochemical wastewater is characterized by high organic content, complex composition, strong odor, and difficult treatment, and the aromatic components in the wastewater are highly toxic and have "three causes". Untreated petrochemical wastewater discharged up to the standard will not only have a serious impact on the e...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F1/461
CPCC02F3/005C02F1/46109C02F2001/46133C09D127/18C08K3/042C08K2003/0856C08F214/262C09C1/0081C01P2006/40C02F2103/365C02F2001/46138C02F3/348C02F3/346C02F2101/32C02F2201/46135C02F3/344C01B32/19C08K3/01C08F216/1475C09D7/62C09D5/24C09D127/22
Inventor 周启星李瑞祥李田张晓林
Owner NANKAI UNIV
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