Evaluation of the biodegradability and toxicity of landfill leachates after pretreatment using advanced oxidative processes

Waste Management
Fabio Moraes da CostaJuacyara C Campos

Abstract

Leachate from urban solid waste landfills is a complex mixture of organic and inorganic substances that cause damage to the environment, due to the high concentration of recalcitrant organic matter and toxicity. The objective of this study was to apply advanced oxidation processes (AOP), namely the dark Fenton and solar photo-Fenton processes, to young and old landfill leachates prior to biological treatment. The leachates were obtained from the Seropedica and Gramacho landfill sites, respectively, located in Rio de Janeiro State, Brazil. For the two Fenton processes, different conditions of pH (1.5, 3.0 and 5.0) and Fe2+: H2O2 ratio (1:2, 1:5 and 1:10) were evaluated. Biodegradability was evaluated using the Zahn-Wellens methodology and Aliivibrio fischeri acute toxicity tests were conducted in order to predict the toxicity in the activated sludge. The best conditions for both Fenton processes were pH of 3.0 and Fe2+: H2O2 and CODRAW:H2O2 mass ratios of 1:5 and 1:1, respectively. The solar photo-Fenton process was more effective at improving the quality for both leachates, reaching COD, TOC and abs 254 nm reductions of 82%, 85% and 96.3%, respectively, for the Seropedica landfill leachate. In the case of the Gramacho landfill ...Continue Reading

Citations

Apr 27, 2019·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Alyne Moraes CostaJuacyara Carbonelli Campos
Jun 22, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ronei de AlmeidaJuacyara Carbonelli Campos
Sep 23, 2020·PloS One·Ardak MakhatovaStavros G Poulopoulos
Dec 18, 2019·Environmental Science and Pollution Research International·Fan ZengHuangang Shi
Sep 11, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Lina M RouidiOuafia Balamane
Jul 2, 2018·Environmental Science and Pollution Research International·Annabel FernandesAna Lopes
Jun 7, 2019·Environmental Health Insights·Priyal GuptaPradyumna Kumar Mishra
Jun 29, 2021·Journal of Hazardous Materials·Luana de Morais E SilvaMarcus Tullius Scotti
Jul 31, 2021·Waste Management·Yara L BrasilMíriam C S Amaral
Aug 6, 2021·Environmental Science and Pollution Research International·Alyne Moraes CostaJuacyara Carbonelli Campos
Sep 28, 2021·Journal of the Air & Waste Management Association·Salvador VillamizarJoseph Soto

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