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A step forward towards synthesizing a stable and regeneratable nanocomposite for remediation of trichloroethene
East China University of Science and Technology, Shanghai, China.
University of Engineering and Technology Lahore, Faisalabad Campus, Pakistan.
East China University of Science and Technology, Shanghai, China.
Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.ORCID-id: 0000-0002-4359-2232
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2018 (Engelska)Ingår i: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 347, s. 660-668Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Synthesizing supported heterogeneous catalysts is always considered as a persistent approach for degradation of contaminants. However, the stability of these nanocomposites and improvement of process conditions influencing target pollutants degradation are still limited. Herein, on the basis of self-adhesive nature of polydopamine (PDA) and its strong electrostatic interaction with metallic ions, we synthesized a facile, stable, magnetically separable, and environmentally benign PDA decorated, reduced graphene oxide (rGO) supported Fe nanocatalyst (PDA@Fe/rGO). The effects of process variables (pH, PDA@Fe/rGO, and persulphate (PS) dose) on the degradation performance of trichloroethene (TCE), a model chlorinated organic pollutant selected in this study, were investigated. PDA not only encapsulated the host Fe/rGO magnetic particles but also exhibited high magnetization. PDA wrapping tremendously enhanced the thermal stability of nanocatalyst with just 24.1% weight loss at elevated temperature compared to solo Fe/rGO (40.2%). Moreover, TCE degradation mechanism was interpreted by ESR and radical scavenger tests, validating OH[rad], SO4 [rad]− and O2 [rad]− radicals being responsible for TCE degradation. Considering its eminent catalytic activity, simple synthesis approach and excellent kinetics, this recyclable and improved PDA assisted Fe/rGO nanocatalyst further opens a door for practical implementation in the field of contaminated groundwater remediation. 

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2018. Vol. 347, s. 660-668
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URN: urn:nbn:se:mdh:diva-39190DOI: 10.1016/j.cej.2018.04.120ISI: 000432884900065Scopus ID: 2-s2.0-85046093729OAI: oai:DiVA.org:mdh-39190DiVA, id: diva2:1205205
Tillgänglig från: 2018-05-11 Skapad: 2018-05-11 Senast uppdaterad: 2018-07-25Bibliografiskt granskad

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