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Journal of Material Cycles and Waste Management

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28-12-2022 | NOTE

Non-catalytic and catalytic wet oxidation of landfill leachate over CuO and MoO₃

Authors: Bryan Li, Elizabeth Timings, Saeid Baroutian

Published in: Journal of Material Cycles and Waste Management | Issue 2/2023

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Abstract

Leachate, a toxic and complex liquid, is a growing problem for municipal solid waste landfills. This study investigated non-catalytic and homogeneous catalytic (1 g/L MoO₃ and CuO) wet oxidation (WO) for leachate treatment and examined the performance and reusability of the economical catalysts. Leachate was subjected to a 60-min WO at 180–240 °C. Catalysts’ performance was evaluated through a reduction in chemical oxygen demand (COD) and total nitrogen content (TN), production and degradation of volatile fatty acids (VFAs), colour change, and surface characterisation. The breakdown of organic matter, such as humic and fulvic substances, benefited from increased reaction time, temperature and the presence of the catalysts. The catalysts’ contribution to degradation was found to be greater with increasing temperature. A maximum reduction in COD and TN of approximately 50% was obtained at 240 °C with CuO. However, the catalysts experienced fouling, decreasing the performance by up to 50%, limiting its reusability.

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Title: Non-catalytic and catalytic wet oxidation of landfill leachate over CuO and MoO3
Authors: Bryan Li
Elizabeth Timings
Saeid Baroutian
Publication date: 28-12-2022
Publisher: Springer Japan
Published in: Journal of Material Cycles and Waste Management / Issue 2/2023
Print ISSN: 1438-4957
Electronic ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-022-01585-5

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