Investigation of silica fouling in arsenic removal by iron based paked bed systems

Mohammad Badruzzaman, Paul Westerhoff

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ion-based adsorbents - Granular ferric hydroxide (GFH) and Sorb 33 (E33) are commercially available porous adsorbents. These adsorbents are currently being used or expected to be used in a large number of full-scale arsenic treatment systems throughout the US. This study investigated the impact of silica fouling in arsenic removal using ironbased GFH and E33. Batch experiments and column experiments have been conducted to understand the role of silica in arsenic adsorption. It has been observed that adsorption of silica reduces the operational lifetime of GFH and E33 significantly through changing the surface charge. However, several operational strategies such as - (a) series column operation with delayed connection of the second column and (b) regeneration with caustic solution at pH-12 can be used to increase operational lifetime of the adsorptive packed bed system.

Original languageEnglish (US)
Title of host publicationAmerican Water Works Association - AWWA Annual Conference and Exposition, ACE 2007
StatePublished - Dec 1 2007
EventAWWA Annual Conference and Exposition, ACE 2007 - Toronto, ON, Canada
Duration: Jun 24 2007Jun 28 2007

Publication series

NameAmerican Water Works Association - AWWA Annual Conference and Exposition, ACE 2007

Other

OtherAWWA Annual Conference and Exposition, ACE 2007
CountryCanada
CityToronto, ON
Period6/24/076/28/07

Keywords

  • E33
  • GFH
  • Regeneration
  • SEM

ASJC Scopus subject areas

  • Water Science and Technology
  • Geography, Planning and Development

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