Journal
WASTE MANAGEMENT
Volume 107, Issue -, Pages 211-218Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2020.04.009
Keywords
Food waste digestate; Peroxymonosulfate; Activation; Catalytic oxidation; Organic pollutant removal
Categories
Funding
- National Natural Science Foundation of China [51208393, 51908433]
- Special fund project to guide the development of local science and technology by the central government [109]
- Natural Science Foundation of Hubei province-China [2014CFC1137, 2019CFB236]
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The anaerobic digestion of food waste, can result in large amounts of solid waste digestate, often without methods of disposal. In this study, a biochar was prepared from food waste digestate (FWD) by pyrolysis, and its potential to activate peroxymonosulfate (PMS) for the removal of pollutants from a simulated textile wastewater was evaluated. The results showed that the addition of biochar (0.5 g/L) and PMS (1 mM) to wastewater could remove >99% of a representative azo dye pollutant (reactive brilliant red X-3B, 1 g/L) within 10 min. The efficiency of this removal process was attributed to the catalytic sites in the biochar (graphitic carbon and nitrogen, pyridinium nitrogen and C=O structures) which could activate PMS to produce reactive oxygen species (O-1(2), O-2(center dot), (OH)-O-center dot and SO4 center dot). The results obtained in this study confirmed the activation potential of the biochar derived from FWD on PMS, providing an alternative utilization strategy for anaerobic FWD. (C) 2020 Elsevier Ltd. All rights reserved.
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