Performance of carbon aerogels particle electrodes for the aqueous phase electro-catalytic oxidation of simulated phenol wastewaters

• Published in: Journal of hazardous materials Vol. 165; no. 1; pp. 961 - 966
• Main Authors: Lv, Guifen, Wu, Dingcai, Fu, Ruowen
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.06.2009; Elsevier
• Subjects: Applied sciences; Carbon; Carbon aerogels; Catalysis; Catalytic reactions; Chemical engineering; Chemistry; Electrochemical oxidation; Electrochemical Techniques - instrumentation; Electrochemical Techniques - methods; Electrodes; Exact sciences and technology; General and physical chemistry; General purification processes; Industrial Waste; Models, Chemical; Oxidation-Reduction; Particle electrode; Phenol; Phenol - isolation & purification; Pollution; Reactors; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Three-dimensional electrode; Wastewaters; Water Pollutants, Chemical - isolation & purification; Water Purification - methods; Water treatment and pollution; Three-dimensional electrode; Phenol; Carbon aerogels; Particle electrode; Electrochemical oxidation; Electrochemical treatment; Waste water; Electrodes; Electrocatalysis; Chemical oxygen demand; Water quality; Phenols; pH; Oxidation; Reactor; Electrochemical reaction
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2008.10.090

In this paper, the feasibility of using carbon aerogels (CAs) as bed electrodes in a three-dimensional electrode reactor for the electrochemical treatment was studied. It was found that the removal efficiency depended on the airflow, the feed phenol concentration, pH, the ratio of aerogels mass to solution volume, and repeated times. Compared with commercial carbon particle electrodes, the CAs prepared exhibited stronger and longer-term activity to remove phenol simulated wastewater. For 250 mg L −1 of phenol solution, 98% of the initial phenol chemical oxygen demand (COD) can be removed after treatment for 20 min. Moreover, high removal efficiency can be kept basically after being reused many times (e.g. 93% and 82% after 20 times and 50 times, respectively).