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Application of cathode material supporting ternary metal oxide in degradation of HPAM

A ternary metal and oxide technology, applied in water pollutants, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low degradation efficiency, low catalytic activity, poor stability, etc. Degradation, the effect of large specific surface area

Pending Publication Date: 2020-03-10
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the deficiencies in the prior art, the object of the present invention is to provide a kind of ternary metal oxide Ce w Zr y Fe z o 11-x Modified carbon felt composite material, the carbon felt composite material as a cathode, realizes the heterogeneous electrocatalytic degradation of polymer polyacrylamide, overcomes the traditional Fenton reaction with low catalytic activity, poor stability, low degradation efficiency and energy Disadvantages such as high consumption

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  • Application of cathode material supporting ternary metal oxide in degradation of HPAM
  • Application of cathode material supporting ternary metal oxide in degradation of HPAM
  • Application of cathode material supporting ternary metal oxide in degradation of HPAM

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Embodiment 1～5

[0047] A ternary metal oxide Ce w Zr y Fe z o 11-x The preparation method of the carbon felt composite material of modification, comprises the following steps:

[0048] 1) Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O and FeCl 3 ·H 2 O was placed in 20 mL of distilled water and mixed uniformly to obtain a mixed solution, and the pH of the mixed solution was adjusted to 10 by adding ammonia water dropwise to obtain solution A in which a yellow-brown precipitate appeared, wherein the concentration of ammonia water was 0.5 mol L -1 .

[0049] 2) Immerse the carbon felt in solution A, after ultrasonic treatment for 30 minutes, take out the carbon felt from solution A and dry it at 70°C for 12 hours, under the protection of nitrogen, put the carbon felt into the muffle The furnace was kept at 500°C for 5 hours.

[0050] Operate 5 times according to the above steps, during each operation, Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O and FeCl 3 ·H 2 The ratio (w:y:z) of t...

Embodiment 6～11

[0057] A ternary metal oxide Ce w Zr y Fe z o 11-x (Ce 3 ZrFe 2 o 11-x ) The preparation method of the modified carbon felt composite material, comprising the following steps:

[0058] 1) The mass sum is X mg of Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O and FeCl 3 ·H 2 O was placed in 20 mL of distilled water and mixed uniformly to obtain a mixed solution, and the pH of the mixed solution was adjusted to 10 by adding ammonia water dropwise to obtain solution A in which a yellow-brown precipitate appeared, wherein the concentration of ammonia water was 0.5 mol L -1 , according to the amount of substance, Ce(NO 3 ) 3 ·6H 2 O, Zr(NO 3 ) 4 ·5H 2 O and FeCl 3 ·H 2 The ratio of O is 3:1:2;

[0059] 2) Immerse the carbon felt in solution A, after ultrasonic treatment for 30 minutes, take out the carbon felt from solution A and dry it at 70°C for 12 hours, under the protection of nitrogen, put the carbon felt into the muffle The furnace was kept at 500°C for 5 ho...

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Abstract

The invention discloses an application of a carbon felt composite material modified by a ternary metal oxide CewZryFezO11-x in degradation of HPAM, wherein the pH value of electrolyte during the degradation of HPAM is 3-6, and after the degradation for 60 min, degradation efficiency on the HPAM is 65-85%. The carbon felt composite material is prepared through steps of: uniformly mixing cerium salt, zirconium salt, and iron salt in distilled water to prepare a mixed solution; regulating the pH of the mixed solution to 8-10 to obtain a solution A, wherein the ratio of the cerium salt, zirconiumsalt and iron salt is (2-7):1:(1-10) by amount of substance; immersing the carbon felt into the solution A and performing ultrasonic treatment for 20-40 min, taking out the carbon felt from the solution A, and drying the carbon felt; under protection of inert gas or nitrogen, performing thermal insulation treatment at 300-700 DEG C for 3-7 h. At room temperature, the HPAM is subjected to electrochemical degradation by means of an external power supply, thereby degrading the HPAM in the water solution. The method can solve the problems of low catalytic activity, poor stability, low degradationefficiency and high energy consumption in an Electro-Fenton catalytic degradation process.

Description

technical field [0001] The invention belongs to the technical field of electrochemically treating high molecular polymer solutions, and in particular relates to the application of a cathode material loaded with ternary metal oxides in degrading HPAM. Background technique [0002] In recent years, polyacrylamide (HPAM) has become a widely used and indispensable water-soluble organic preparation in various industries. It is generally believed that HPAM is a water-soluble and non-toxic polymer molecule, but if there is a small amount of HPAM remaining in the solution, the main chain cracking speed will be slow when heated or ultraviolet radiation, resulting in natural degradation to acrylamide monomer. Acrylamide can damage the peripheral nervous system of animals and humans, leading to chronic poisoning or gene mutation. Today, with the rapid development of production and industrialization, HPAM left in sewage or soil for a long time will seriously threaten ecological health....

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/461C02F101/38
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/38
Inventor 赵鹏李轶谢良波孟祥海韩玉贵白晓宇刘晓慧肖丽华张晓冉张志熊宋鑫苑玉静
Owner CHINA NAT OFFSHORE OIL CORP
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