In Situ Regeneration of Phenol-Saturated Activated Carbon Fiber by an Electro-peroxymonosulfate Process

• DOI: 10.1021/acs.est.0c03766
• Publication Date: 2020-08-05T19:52:36Z
• Authors: Haojie Ding; Ying Zhu; Yulun Wu; Jian Zhang; Huiping Deng; Huaili Zheng; Zhen Liu; Chun Zhao
• Keywords: Phenol; Phenols; Carbon Fiber; Charcoal; Oxidation-Reduction; 01 natural sciences; 7. Clean energy; Water Pollutants, Chemical; 6. Clean water; Peroxides; 0105 earth and related environmental sciences

Regeneration is required to restore the adsorption performance of activated carbon used as an adsorbent in water purification. Conventional thermal and electrochemical regenerations have high energy consumption poor mineralization pollutants, respectively. In this study, phenol-saturated fiber was regenerated situ using electro-peroxymonosulfate (E-PMS) process, which mineralized desorbed contaminants with relatively low consumption. The initial adsorbed phenol (81.90%) mineralized, only 4.07% concentration remained solution after 6 h E-PMS regeneration. degradation dominated by hydroxyl radical oxidation. Adding PMS three doses at 2 intervals improves regeneration from 75% more than 82%. retained 60% its effectiveness even 10th cycle 4.40% remaining solution. These results confirm process effective, sustainable, environmentally friendly for regenerating carbon.