A modified graphite electrode and a method for electrochemically treating dye wastewater as an anode
A technology for graphite electrodes and dye wastewater, applied in chemical instruments and methods, water/sewage treatment, textile industry wastewater treatment, etc. Application range, the effect of improving the removal rate
Inactive Publication Date: 2019-03-01
HOHAI UNIV
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Problems solved by technology
[0004] However, there are still some problems in the widespread application of electrochemical catalytic oxidation technology in practice. For example, many reaction pathways in electrochemical catalytic oxidation water treatment technology are still in the hypothetical and speculative stage, and many problems in degradation mechanism still need more in-depth research. Research and exploration, the most important factor is the selection of anode materials
[0005] In practical application, the acid-base environment of dye wastewater is not specific, and electrochemical anode electrode materials that can improve the acid-base environment of waste acid and further improve the removal rate of dye in wastewater need to be studied
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[0027] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
[0028] A kind of preparation method of modified graphite electrode is characterized in that, comprises the following steps:
[0029] A1. Take a 2cm×2cm graphite electrode, grind the surface with sandpaper until it is smooth, put it into 2mol / L NaOH solution for 60min, then put it into 1mol / L hydrochloric acid solution for 20min, wash it with distilled water and dry it to prepare the preparation Graphite electrode;
[0030] A2. Mix 2.5g of MCM-41 and 2.5g of 3-aminopropyltrimethoxysilane into 50mL of n-hexane, condense at room temperature for 6h, filter, rinse with n-hexane and dry in an oven at 105°C for 24h to obtain NH 2 - MCM-41 powder;
[0031] A3, add 1g NH 2 -MCM-41 powder and 1g The powder is mixed and dissolved in 80ml of distilled water, sealed into the inner core of the reactor, placed in an oven, baked at 105°C for 10 hour...
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Abstract
The invention discloses a modified graphite electrode and a method for using the same as an anode for electrochemical treatment of dye wastewater. According to the method, the graphite electrode is pretreated, then a mixture of CO2O3 and MCM-41(NH2-MCM-41) modified with 3-aminopropyl trimethoxy silane is mixed with the electrode, and then drying and washing are conducted for determining that a mixture of CO2O3 and NH2-MCM-41 is bonded to the graphite electrode. The prepared modified graphite electrode CO2O3-NH2-MCM-41 / C is used as the anode for electrochemical treatment, the production cost is lowered, and the efficiency and productivity of dye wastewater treatment through an electrochemical method are improved while the anode adapts to dye wastewater in environments with different pH values, particularly an alkaline environment.
Description
technical field [0001] The invention relates to a modified graphite electrode, in particular to a modified graphite electrode and a method for electrochemically treating dye wastewater as an anode. Background technique [0002] With the rapid development of industrial production and human society, the problem of environmental pollution is becoming more and more serious, especially the amount and types of toxic and harmful substances in industrial wastewater are increasing rapidly, which seriously restricts the sustainable development of human society. Dye wastewater accounts for a large proportion of industrial wastewater. It has the characteristics of high concentration of pollutants, large chroma, strong toxicity, complex composition, poor biodegradability and extremely difficult treatment. Traditional biological treatment technology is difficult to effectively treat Industrial dye wastewater. [0003] Due to the characteristics of high COD and high salt in dye wastewater...
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IPC IPC(8): C02F1/461C02F103/30
CPCC02F1/46109C02F2001/46133C02F2103/30
Inventor 沙海涛吴云海姹丽根明珠
Owner HOHAI UNIV