Selective denitrification of simulated oily wastewater by oxidation using Janus-structured carbon nanotubes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Roman, FF (Autor) Outra; de Tuesta, JLD (Autor) Outra; Sanches, FKK (Autor) Outra; Silva, AS (Autor) Outra; Marin, P (Autor) Outra; B.F. Machado (Autor) FEUP; Serp, P (Autor) Outra; Pedrosa, M (Autor) FEUP; Silva, Adrian (Autor) FEUP; Joaquim Luís Faria (Autor) FEUP; Gomes, HT (Autor) Outra

Revista

Título: Catalysis Today

Vol. 420

ISSN: 0920-5861

Editora: Elsevier

Indexação

ISI Web of Knowledge - 0 Citações

Scopus

Projetos Associados

Healthy Waters - Healthy Waters - Identification, Elimination, Social Awareness and Education of Water Chemical and Biological Micropollutants with Health and Environmental Implications

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Outras Informações

ID Authenticus: P-00X-SWQ

DOI: 10.1016/j.cattod.2023.01.008

Abstract (EN): The intense industrial development has resulted in several consequences for human and environmental health, including the increased discharge of oily products in water bodies. Oily products are widely used in industry, often bearing an associated high cost. Finding alternatives to treat oily wastewater aiming at recovering oily and water phases is an approach allowing recovery of products of economic interest. In this work, Janus-like carbon nanotubes (CNTs) were synthesized by varying the feed time of acetonitrile and ethylene, respectively, as ni-trogen/carbon and carbon precursors in a chemical vapor deposition (CVD) approach. The CVD approach allowed the synthesis of completely undoped, completely doped and partially doped CNTs with a Janus structure. The CNTs were then tested as catalysts for the selective oxidation of 4-nitrophenol (4-NP) contained in a simulated oily wastewater (2,2,4-trimethylpentane/water (O/W) = 1:9, volume basis) by catalytic wet peroxide oxidation (CWPO). The CWPO experiments were conducted for 24 h, 80 degrees C, 2.5 g L-1 of catalyst, and the stoichiometric concentration of H2O2 (3.6 g L-1) for the degradation of 4-NP (1 g L-1). The same conditions were kept for experiments conducted under a biphasic system. The catalysts bearing a Janus-like structure were demonstrated to be more effective in CWPO experiments in aqueous-only and biphasic systems for the abatement of 4-NP.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13