Multivariate evaluation and optimization of an activated-magnesium/co-solvent system for the reductive degradation of polycyclic aromatic hydrocarbons

    Authors

    M. R. Elie; C. A. Clausen;C. L. Yestrebsky

    Comments

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    Abbreviated Journal Title

    J. Hazard. Mater.

    Keywords

    Degradation; Magnesium; Co-solvent; Polycyclic aromatic hydrocarbons; Chemical reduction; ETHYL LACTATE; CATALYTIC-HYDROGENATION; DECHLORINATION; METAL; WATER; KINETICS; REMOVAL; ETHANOL; Engineering, Environmental; Engineering, Civil; Environmental Sciences

    Abstract

    The present study evaluates the capability of an activated-magnesium metal and protic co-solvents to promote the reductive degradation of three different polycyclic aromatic hydrocarbons, specifically pyrene, benzo[k]fluoranthene and benzo[g,h,i]perylene. Multivariate analyses demonstrated that the kinetics of degradation was affected by several experimental factors such as magnesium loading, acid addition and solubility of the compounds. It was determined that an acid activator is needed for the degradation reaction to proceed and it is also noted that the use of a 1:1 ethanol/ethyl lactate co-solvent is ideal for the complete dissolution of all three compounds with concentrations varying from 200 to 275 mg L-1. The experimental results also indicate that, at room temperature conditions, only 0.05-0.1 g of magnesium is required in order to achieve greater than 93% degradation efficiency after 24 h of reaction. This methodology is attractive and may allow for the development of an economic and environmentally friendly field application for the remediation of other polycyclic aromatic hydrocarbons. (C) 2013 Elsevier B.V. All rights reserved.

    Journal Title

    Journal of Hazardous Materials

    Volume

    248

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    150

    Last Page

    158

    WOS Identifier

    WOS:000317443800016

    ISSN

    0304-3894

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