Application of titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater
The present disclosure provides an application of a titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater, and belongs to the technical field of wastewater treatment. The present disclosure provides the application of the titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater. Titanium carbide (TiC) is a typical transition metal carbide and has good conductivity and excellent chemical stability; compared with a titanium dioxide/carbon nanomaterial, the titanium carbide/porous carbon composite has a rich pore structure that provides a large number of activated adsorption sites for adsorption of metal ions during electro-adsorption, so that the electro-adsorption efficiency can be substantially improved, and a better electro-adsorption effect is obtained.
1. A process for using a titanium carbide/porous carbon composite in electrochemical treatment of uranium-containing wastewater, comprising the following steps:
applying the titanium carbide/porous carbon composite in the form of a titanium carbide/porous carbon composite electrode,
wherein the titanium carbide/porous carbon composite electrode is fabricated by drop casting of the titanium carbide/porous carbon composite on carbon paper, and
the titanium carbide/porous carbon composite is fabricated by a method comprising the following steps:
mixing polystyrene microspheres, isopropanol, a titanium source and terephthalic acid to obtain a gel;
conducting a first calcination on the gel under argon atmosphere to obtain a precursor material; and
mixing the precursor material with a carbon source, and conducting a second calcination under argon atmosphere to obtain the titanium carbide/porous carbon composite.
2. The process according to claim 1 , wherein uranium in the uranium-containing wastewater exists in the form of uranium(VI).
3. The process according to claim 1 , wherein a concentration of uranium in the uranium-containing wastewater is 20-50 mg/L.
4. The process according to claim 2 , wherein a concentration of the uranium(VI) in the uranium-containing wastewater is 20-50 mg/L.
5. The process according to claim 1 , wherein the electrochemical treatment is conducted at a working voltage of 0-1.4 V, the working voltage is not 0, and an inlet flow rate is 15-35 mL/min.
6. The process according to claim 2 , wherein the electrochemical treatment is conducted at a working voltage of 0-1.4 V, the working voltage is not 0, and an inlet flow rate is 15-35 mL/min.
7. The process according to claim 1 , wherein the first calcination is conducted at a temperature of 600-800° C. for 2-4 h.
8. The process according to claim 1 , wherein the second calcination is conducted by calcining at 600-800° C. for 2 h, then heating to 1,250-1,300° C., and holding for 2 h.
9. The process according to claim 1 , wherein the polystyrene microspheres, the titanium source and the terephthalic acid have a weight ratio of 10:(4-7):1.
10. The process according to claim 1 , wherein the polystyrene microspheres are 450 nm±16 nm in particle size.