Evaluating the adsorption of microcystin toxins using granular activated carbon (GAC)

Abstract

Research Article| August 01 2007 Evaluating the adsorption of microcystin toxins using granular activated carbon (GAC) Lionel Ho; Lionel Ho 1Cooperative Research Centre for Water Quality & Treatment, Australian Water Quality Centre, SA Water Corporation, PMB 3, Salisbury, SA 5108, Australia Tel.: +61-8-8259-0314 Fax: +61-8-8259-0228; E-mail: [email protected] Search for other works by this author on: This Site PubMed Google Scholar Gayle Newcombe Gayle Newcombe 1Cooperative Research Centre for Water Quality & Treatment, Australian Water Quality Centre, SA Water Corporation, PMB 3, Salisbury, SA 5108, Australia Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2007) 56 (5): 281–291. https://doi.org/10.2166/aqua.2007.080 Article history Received: October 09 2006 Accepted: May 16 2007 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Lionel Ho, Gayle Newcombe; Evaluating the adsorption of microcystin toxins using granular activated carbon (GAC). Journal of Water Supply: Research and Technology-Aqua 1 August 2007; 56 (5): 281–291. doi: https://doi.org/10.2166/aqua.2007.080 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Microcystins are potent cyanobacterial toxins which have been shown to be recalcitrant to conventional water treatment. Granular activated carbon (GAC) has been identified as a promising treatment option for the removal of these toxins. In this study, the adsorption of two microcystin analogues by GAC was described using experimentally-derived Freundlich and kinetic parameters. The Freundlich parameters (K and 1/n) were determined from bottle point isotherm tests, while kinetic parameters (Ds and kf) were determined using the short bed adsorber (SBA) test coupled with the homogenous surface diffusion model (HSDM). Once these parameters were derived, it was possible to predict the breakthrough of both microcystin analogues at a pilot-scale GAC filter. However, biological degradation, which was not modelled, appeared to be the predominant removal mechanism in the pilot-scale filter. Consequently, the HSDM overestimated microcystin breakthrough. A batch degradation experiment confirmed that bacteria within the biofilm of the pilot-scale GAC filter were capable of degrading the microcystins. adsorption, biological degradation, granular activated carbon (GAC), homogenous surface diffusion model (HSDM), microcystin, short bed adsorber (SBA) This content is only available as a PDF. © IWA Publishing 2007 You do not currently have access to this content.