Title

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

Authors

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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