Removal of Arsenic(V) Using an Iron-Impregnated Ion Exchange Bead

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Laura E. LeMire (Autor) Outra; Miguel A.Teixeira (Autor) FEUP; Brian E. Reeda (Autor) Outra

Revista

Título: Separation Science and Technology

Páginas: 2051-2063

ISSN: 0149-6395

Editora: Taylor & Francis

Indexação

ISI Web of Science

Scopus

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

DOI: 10.1080/01496395.2010.504433

Abstract (EN): The ability of an iron-impregnated ion exchange bead (PWX5) to remove As(V) from ground water was investigated. The effects of particle size, solution pH, As(V) concentration, competition, adsorbent concentration, temperature, iron content, and iron accessibility on removal kinetics and/or equilibrium were determined. PWX5’s performance was compared to other iron-based adsorbents, primarily Bayoxide1 E-33 (E-33), a granular ferric oxide, for arsenic removal performance. All of the factors cited impacted either the amount of As(V) adsorbed or the rate of adsorption. Stirred batch reactor data showed the rate of adsorption increased as particle size decreased and bottle point isotherm data showed As(V) adsorption maximum capacity increased with higher initial adsorbate concentration. The presence of phosphate and silicate reduced the amount of As(V) adsorbed as did a pH>7.0. PWX5 is durable, rather homogeneous in size and effective at removing As(V). It is a viable alternative to E-33 which has a wider size distribution and wears more easily.

Idioma: Inglês

Tipo (Avaliação Docente): Científica