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

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Laura E. LeMire (Author) Other; Miguel A.Teixeira (Author) FEUP; Brian E. Reeda (Author) Other

Journal

Title: Separation Science and Technology

Pages: 2051-2063

ISSN: 0149-6395

Publisher: Taylor & Francis

Indexing

ISI Web of Science

Scopus

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

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.

Language: English

Type (Professor's evaluation): Scientific