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Indexed by:Journal Papers

Date of Publication:2015-12-17

Journal:SEPARATION AND PURIFICATION TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:156

Page Number:766-771

ISSN No.:1383-5866

Key Words:Pulsed corona discharge plasma; gamma-Al2O3-supported catalysts; Phe removal; Soil remediation

Abstract:Removal of polycyclic aromatic hydrocarbon (PAH) in soil by pulsed corona discharge plasma with gamma-Al2O3-supported catalysts was studied at normal temperature and atmospheric pressure. Phenanthrene (Phe) was used as the model pollutant. Spontaneous CuO/gamma-Al2O3, MnO2/gamma-Al2O3, Fe2O3/gamma-Al2P3 or TiO2/gamma-Al2O3 was added into plasma system. Phe removal, energy efficiency and catalytic property were investigated. The results showed that prepared gamma-Al2O3-supported catalysts all exhibited catalytic effects on Phe removal from soil. Removal efficiencies of Phe were improved by 14.1%, 21.4%, 16.5% and 9.1% in 40 min at 5 wt% amount of CuO/gamma-Al2O3, MnO2/gamma-Al2O3, Fe2O3/gamma-Al2O3 and TiO2/gamma-Al2O3, respectively. The energy efficiency increased when pulsed corona discharge plasma was combined with catalysts. As each catalyst dosage was increased from 5 wt% to 23 wt%, the energy efficiency of the reactor with discharge alone was further increased by approximately 20%-40%. Furthermore, the catalysts kept stable activity in Phe removal after five times reuse cycle. Effect of pulsed corona discharge plasma on physicochemical properties of catalysts were evaluated through XRD and BET characterization. This study implied a promising combined-application of gamma-Al2O3-supported catalysts and pulsed corona discharge plasma for the removal of PAM in soil. (C) 2015 Elsevier B.V. All rights reserved.