Abstract
Abstract Landfill leachates can contain organic pollutants that may have an adverse impact on water bodies receiving the leachates unless some form of treatment reduces the pollutants to acceptable levels (often measured as biochemical oxygen demand and chemical oxygen demand [COD]). Age of the landfill can dictate treatment methods with younger landfill leachates that are often being treated using cheaper biotreatment processes and older landfills often requiring chemical and/or physical treatment due to the biorecalcitrance of the organics in these older landfill leachates. Fenton's reagent oxidation is a process with potential to significantly reduce COD from landfill leachates. Fenton's reagent oxidation reactions were carried out at room temperature (20 ± 5°C) and atmospheric pressure. Experiments were conducted by adding the necessary amount of FeSO4•7H2O and 30% (w/w) H2O2 to the leachate. Samples of reaction mixture were collected at specified times for COD analysis; 6 N sodium hydroxide solution ...
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