title: Ferrous ion-activated persulphate process for landfill leachate treatment: removal of organic load, phenolic micropollutants and nitrogen.
abstract: The innovative [Formula: see text] treatment technology based on sulphate radicals induced oxidation was applied for the treatment of landfill leachate. The performance of chemical oxygen demand (COD) and dissolved organic carbon (DOC) removal in the Fe2+-activated persulphate system was moderate; however, the results of dissolved nitrogen (DN) and total phenols removal showed significant efficacy (≤39% and ≥87%, respectively). [Formula: see text] addition to the [Formula: see text] system enhanced the treatment efficacy and resulted in supplementary 15% of COD and 5% of DN removal. Hydroxyl radical-based H2O2/Fe2+treatment of the landfill leachate was performed as well; the results indicated higher removal efficacy of COD and DOC compared to the [Formula: see text] system. However, practical application of the H2O2/Fe2+system is considerably influenced by temperature rise and excessive foam formation. Generally, the ferrous ion-activated persulphate treatment could be a promising technology for ex situ as well as in situ landfill leachate treatment applications.
authors: a Department of Chemical Engineering , Tallinn University of Technology , Ehitajate tee 5, Tallinn , Estonia.
authors: Eneliis
authors: E
authors: Kattel
authors: a Department of Chemical Engineering , Tallinn University of Technology , Ehitajate tee 5, Tallinn , Estonia.
authors: Niina
authors: N
authors: Dulova
mesh_terms: D057919:Biological Oxygen Demand Analysis; D005296:Ferrous Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry; D017670:Sodium Compounds / Q000737:chemistry*; D013431:Sulfates / Q000737:chemistry*; D013885:Thiosulfates / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D005296:Ferrous Compounds; D010636:Phenols; D017670:Sodium Compounds; D013431:Sulfates; D013885:Thiosulfates; D014874:Water Pollutants, Chemical; C020748:ferrous sulfate; D006861:Hydrogen Peroxide; C017717:sodium thiosulfate; C024625:sodium persulfate; D009584:Nitrogen
keywords: Activated persulphate; Fenton process; landfill leachate; reducing agent; sulphate radical