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Accelerating the Fenton Reaction with a Magnetic Microswarm for Enhanced Water Remediation
Author(s) -
Wang Qinglong,
Ji Fengtong,
Wang Shijie,
Zhang Li
Publication year - 2021
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.202100108
Subject(s) - degradation (telecommunications) , environmental remediation , rhodamine b , pollutant , nanoparticle , magnetic nanoparticles , human decontamination , ion , chemical engineering , materials science , chemistry , nanotechnology , environmental chemistry , catalysis , contamination , waste management , organic chemistry , computer science , photocatalysis , telecommunications , ecology , engineering , biology
The Fenton reaction, among one of the advanced oxidation processes, has been widely employed for water remediation. Here, we report using magnetic Fe 3 O 4 nanoparticles to accelerate the degradation of the simulative organic pollutant (i. e., Rhodamine B) in a collective manner, featuring an enhanced Fenton reaction. Fe 2+ ions released from Fe 3 O 4 nanoparticles function as a reducing agent to trigger the Fenton reaction in an acidic environment. A large number of Fe 3 O 4 nanoparticles form the microswarm by applying a rotating magnetic field, which would further improve the intermixing and reaction diffusion as a result of the hydrodynamic vortex created by magnetic chains. Moreover, the microswarm possesses the ability of targeted degradation achieved by the collective locomotion, and such a collective manner would ultimately avoid the loss of Fe 3 O 4 nanoparticles during the whole process. Besides, Fe 3 O 4 nanoparticles can be magnetically collected and rinsed for recycling use, with a retained dye degradation rate of 73.5% after 3 degradation cycles. As a result, the magnetic microswarm holds advantages in terms of low cost, enhanced degradation, recyclability, and targeted decontamination, which is promising for the removal of organic pollutants.