Open AccessMetal Foam-Based Fenton-Like Process by Aeration
Author(s) -
Wubo Wan,
Yan Zhang,
Ran Ji,
Binbin Wang,
Feng He
Publication year - 2017
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.7b00977
Subject(s) - aeration , wastewater , degradation (telecommunications) , metal , nickel , chemical engineering , radical , chemistry , process (computing) , materials science , environmental engineering , environmental science , organic chemistry , computer science , telecommunications , engineering , operating system
A novel metal foam-based Fenton-like process for wastewater treatment is illustrated in this study. In the system, H 2 O 2 was generated in situ by taking advantage of O 2 in air, as metal could activate dissolved O 2 to produce • O 2 - and then generate H 2 O 2 . Furthermore, metal foam can enhance the Fe 3+ /Fe 2+ cycling, which eventually improved the efficiency of the Fenton process. The performance of the novel Fenton-like process was assessed by methyl blue (MB), and 94% MB removal could be achieved within 5 min in nickel (Ni) foam system. The degradation of MB in this study was based on both • OH and • O 2 - radicals, where • O 2 - radical served as the precursor to generate • OH for MB degradation through a Fenton process. The pH value of 3 with the initial Fe 2+ concentration of 0.25 mM was found to be the optimum condition for the Fenton-like process. This study provides a general and new strategy for efficient wastewater treatment just using aeration and metal foams (such as Ni, Al, and Cu foams), which also offers a good alternative for rational design and application of traditional Fenton process.