Adsorption of paraquat herbicide on deposits from drinking water networks

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Mónica S. F. Santos (Autor) FEUP; Gabriela Schaule (Autor) Outra; A. Alves (Autor) FEUP; Luís M. Madeira (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 229

Páginas: 324-333

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 47 Citações

ISI Web of Science

Scopus - 45 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

SECUREAU - Security and decontamination of drinking water distribution systems following a deliberate contamination

ACQUASAFE - Segurança química em sistemas de abastecimento de água

Outras Informações

ID Authenticus: P-006-8B3

DOI: 10.1016/j.cej.2013.06.008

Abstract (EN): Although forbidden in Europe, paraquat is still largely used worldwide as herbicide. Therefore, the hypothesis of an accidental or deliberate contamination of drinking water distribution systems (DWDSs) may be posed. The interactions between paraquat and three typical deposits (S2, S3 and S4 deposits) from DWDS were investigated in order to understand the fate of this chemical in such systems in case of contamination. Additionally, these materials can be valorized as adsorbents in wastewater treatment applications. The effect of stirring speed, adsorbent dose, initial paraquat concentration and temperature on the adsorption kinetics was evaluated. Good adherence was observed between experimental data and both kinetic (pseudo-second order) and equilibrium (Langmuir) models. The interaction between paraquat and the deposits is extremely weak when compared to those established in the paraquat-clay system, where irreversible sorption was observed. It was found that S2 and S3 may represent potential adsorbents regarding the treatment of paraquat-contaminated waters.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10