Liquid sodium ferrate and Fenton's reagent for treatment of mature landfill leachate

    Authors

    E. S. Batarseh; D. R. Reinhart;L. Daly

    Comments

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    Abbreviated Journal Title

    J. Environ. Eng.-ASCE

    Keywords

    POTASSIUM FERRATE(VI); HUMIC SUBSTANCES; ORGANIC-MATTER; OXIDATION; COAGULATION; REMOVAL; PRETREATMENT; INTEGRATION; REDUCTION; CARBON; Engineering, Environmental; Engineering, Civil; Environmental Sciences

    Abstract

    As landfills mature, biodegradable matter in leachate is consumed and remaining compounds are increasingly recalcitrant. In this work, ferrate was compared to Fenton's reagent for the purpose of removing nonbiodegradable organic compounds from mature leachate. Oxidation conditions (time, pH, and dose) were optimized to yield maximum organic removal using two leachate samples from 20- and 12-year-old solid waste cells. Results from this study demonstrated that Ferrate and Fenton's reagent had similar optimum pH ranges (3-5), but different organic removal capacities, ranging from 54 to 79% of initial leachate organic contents. An advantage of ferrate was that it was effective over a wide pH range. Advantages associated with Fenton's reagent include that it had higher organic removal capacity, produced more oxidized organic compounds (measured as chemical oxygen demand/dissolved organic carbon), and produced more biodegradable byproducts (measured as chemical oxygen demand/5-day biochemical oxygen demand). Finally, both treatments were found to attack larger molecules ( > 1,000 Dalton), as indicated by an increase in smaller molecule contribution to organic carbon.

    Journal Title

    Journal of Environmental Engineering-Asce

    Volume

    133

    Issue/Number

    11

    Publication Date

    1-1-2007

    Document Type

    Article

    Language

    English

    First Page

    1042

    Last Page

    1050

    WOS Identifier

    WOS:000250318000005

    ISSN

    0733-9372

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