title: Decomposing phenol by the hidden talent of ferromagnetic nanoparticles.
abstract: Researches on modified Fenton reactions applied in phenol degradation have been focused on reducing secondary pollution and enhancing catalytic efficiency. Newly developed methods utilizing carriers, such as Resin and Nafion, to immobilize Fe(2+) could avoid iron ion leakage. However, the requirement of high temperature and the limited reaction efficiency still restrained them from broad application. Based on a recently discovered "hidden talent" of ferromagnetic nanoparticles (MNPs), we established a MNP-catalyzed phenol removal assay, which could overcome these limitations. Our results showed that the MNPs removed over 85% phenol from aqueous solution within 3h even at 16 °C. The catalytic condition was extensively optimized among a range of pH, temperature as well as initial concentration of phenol and H(2)O(2). TOC and GC/MS analysis revealed that about 30% phenol was mineralized while the rest became small molecular organic acids. Moreover the MNPs were thermo-stable and could be regenerated for at least five rounds. Thus, our findings open up a wide spectrum of environmental friendly applications of MNPs showing several attractive features, such as easy preparation, low cost, thermo-stability and reusability.
authors.affiliation: National Laboratory of Biomacromolecules and Chinese Academy of Sciences, University of Tokyo Joint Laboratory of Structural Virology and Immunology, Institute of Biophysics, Chinese Academy of Sciences, Mailbox 1, 15 Datun Road, Beijing 100101, China.
authors.forename: Jinbin
authors.initials: J
authors.lastname: Zhang
authors.forename: Jie
authors.initials: J
authors.lastname: Zhuang
authors.forename: Lizeng
authors.initials: L
authors.lastname: Gao
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ning
authors.initials: N
authors.lastname: Gu
authors.forename: Jing
authors.initials: J
authors.lastname: Feng
authors.forename: Dongling
authors.initials: D
authors.lastname: Yang
authors.forename: Jingdong
authors.initials: J
authors.lastname: Zhu
authors.forename: Xiyun
authors.initials: X
authors.lastname: Yan
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D010636:Phenols / Q000032:analysis / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D010636:Phenols; D014874:Water Pollutants, Chemical; C001215:ferrite; D006861:Hydrogen Peroxide