Decomposing phenol by the hidden talent of ferromagnetic nanoparticles

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.
Chemosphere (Impact Factor: 3.34). 10/2008; 73(9):1524-8. DOI: 10.1016/j.chemosphere.2008.05.050
Source: PubMed


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.

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Available from: Xiaodong Yan, May 04, 2015
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    • "The use of magnetic nanoparticles as heterogeneous catalysts in water decontamination for efficient mineralization of persistent micropollutants has attracted increasing attention in the last years (Ren et al. 2013; Shahwan et al. 2011; Sun and Lemley 2011; Munoz et al. 2015; Nadejde et al. 2015; Hanif and Shahzad 2014; Song et al. 2013). Magnetite (Fe 3 O 4 ) nanoparticles represent promising candidates as catalysts during AOP due to their benign nature, low-cost, simple, and large-scale manufacturing (Munoz 2015; Nadejde et al. 2015; Wang et al. 2012; Zhang et al. 2008, 2009; Atacan and O ¨ zacar 2015); furthermore, their properties can be tailored according to their purpose; the nanostructures' surface can be functionalized with a wide variety of non-toxic materials containing (photo)active groups that act both as nanoparticle stabilizers and also as catalysts. Moreover, their activity and selectivity are strongly dependent on the catalyst physico-chemical properties . "
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    • "It is also proven to be feasible in treating industrial effluents (Ayoub et al., 2011). There are four major types of AOPs e photo catalytic oxidation (which requires a photo active catalyst and UV light), UV/H 2 O 2 , UV/ozone oxidation and Fenton oxidation (Zhang et al., 2008), all of which are covered in this Table 1 Typical characteristic of different types of recalcitrant wastewater "
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