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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (5): 054013.doi: 10.1088/2058-6272/aaa7e9

• THE 8TH INTERNATIONAL CONFERENCE ON APPLIED ELECTROSTATICS • Previous Articles     Next Articles

Degradation of phenol using a combination of granular activated carbon adsorption and bipolar pulse dielectric barrier discharge plasma regeneration

Shoufeng TANG (唐首锋)1,3 ,Na LI (李娜)1, Jinbang QI (綦金榜)1 , Deling YUAN (袁德玲)1,3 and Jie LI (李杰)2   

  

  1. 1 Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, People’s Republic of China 2 Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024, People’s Republic of China
  • Received:2017-10-18 Published:2018-01-14
  • Supported by:

    This work was financially supported by National Natural Science Foundation of China (Project No. 51608468), the Natural Science Foundation of Hebei Province (Project Nos. B2015203303 and B2015203300), the China Postdoctoral Science Foundation (Project Nos. 2015M580216 and 2016M601285), the Youth Teacher Independent Research Program of Yanshan University (Project No. 15LGA013), and the Hebei Province Preferred Postdoctoral Science Foundation (B2016003019). In addition, the study was supported by the Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering (MOE).

Abstract:

A combined method of granular activated carbon (GAC) adsorption and bipolar pulse dielectric barrier discharge (DBD) plasma regeneration was employed to degrade phenol in water. After being saturated with phenol, the GAC was filled into the DBD reactor driven by bipolar pulse power for regeneration under various operating parameters. The results showed that different peak voltages, air flow rates, and GAC content can affect phenol decomposition and its major degradation intermediates, such as catechol, hydroquinone, and benzoquinone. The higher voltage and air support were conducive to the removal of phenol, and the proper water moisture of the GAC was 20%. The amount of H2O2 on the GAC was quantitatively determined, and its laws of production were similar to phenol elimination. Under the optimized conditions, the elimination of phenol on the GAC was confirmed by Fourier transform infrared spectroscopy, and the total removal of organic carbons achieved 50.4%. Also, a possible degradation mechanism was proposed based on the HPLC analysis. Meanwhile, the regeneration efficiency of the GAC was improved with the discharge treatment time, which attained 88.5% after 100 min of DBD processing.

Key words: granular activated carbon regeneration, dielectric barrier discharge plasma, phenol degradation, bipolar pulse power