Two types of Fe(0)-biochar composites, Fe(0)-included biochar and biochar-coated Fe(0) were synthesized in a laboratory with different methods, and their catalytic role was investigated in the oxidative degradation of phenol by persulfate via a series of batch experiments. Compared with individual biochar-Fe(0)-persulfate systems, phenol was degraded more effectively by persulfate with less amount of the Fe(0)-biochar composites or persulfate. More than 95% of phenol was degraded in the Fe(0)-biochar composites-persulfate systems with 2.08 mM of persulfate and 2400 mg of Fe(0)-included biochar or 5.20 mM of persulfate and 1200 mg of biochar-coated Fe(0). Electron paramagnetic resonance analysis showed that sulfate and hydroxyl radicals were involved in phenol degradation. A graphitic structure and oxygen-containing functional groups on biochar were responsible for enhancement of phenol degradation. Our study suggests that the addition of Fe(0)-biochar composites to persulfate systems may be a simple and effective remediation option to enhance the removal of phenol from natural and engineered aquatic systems.

Degradation of phenol by persulfate activated with zero-valent iron-biochar composites

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.