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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2024

Autores

Perdigao-Lima, T (Autor) Outra; De Tuesta, JLD (Autor) Outra; Feliciano, M (Autor) Outra; Furst, LC (Autor) Outra; Roman, FF (Autor) Outra; Silva, AS (Autor) Outra; Wilken, AAP (Autor) Outra; Silva, Adrian (Autor) FEUP; Gomes, HT (Autor) Outra

Revista

Título: Global Nest Journal

Vol. 26

ISSN: 1790-7632

Editora: Global Nest

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-010-Z7H

DOI: 10.30955/gnj.004862

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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8