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Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes

Title
Removal of gaseous ammonia released from leachate by adsorption on carbon-based adsorbents prepared from agro-industrial wastes
Type
Article in International Scientific Journal
Year
2024
Authors
Perdigao-Lima, T
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De Tuesta, JLD
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Feliciano, M
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Furst, LC
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Roman, FF
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Silva, AS
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Wilken, AAP
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Gomes, HT
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Journal
Title: Global Nest JournalImported from Authenticus Search for Journal Publications
Vol. 26
ISSN: 1790-7632
Publisher: Global Nest
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Publicação em ISI Web of Knowledge ISI Web of Knowledge - 0 Citations
Publicação em Scopus Scopus - 0 Citations
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Authenticus ID: P-010-Z7H
Abstract (EN): Landfill facilities and organic waste treatment plants typically are known sources of odour pollution, such as gaseous NH 3 , among others. In this work, the removal of gaseous NH 3 released from a composting line of a mechanical and biological treatment plant of undifferentiated municipal solid waste was assessed in a fixed -bed column loaded with carbon -based adsorbents (CBAs) prepared from olive stone and malt bagasse as carbon precursors. CBAs were prepared by hydrothermal carbonization (HTC) assisted by H 2 SO 4 and pyrolysis, resulting in materials with different physical and chemical properties. The hydrochar derived from olive stone by H 2 SO 4 -assisted HTC was found as the best adsorbent for NH 3 removal (10.4 mg g -1 ). This result was ascribed to the high acid character of the adsorbent (2.34 mmol g -1 ), since it was found that acidity contributed significantly more than the specific surface of the adsorbents for the removal of NH 3 (BET surface of 4 m 2 g -1 was obtained for the CBA with the highest uptake capacity, whereas other adsorbents reach values of 172 m 2 g -1 and NH 3 uptake capacities of 0.07 mg g -1 ). The NH 3 -saturated hydrochar was regenerated by washing with water and subsequently reused in the adsorption of NH 3 , with a performance more than 70% compared to its first use.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 8
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