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https://hdl.handle.net/2440/57622
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Type: | Journal article |
Title: | Bacterial degradation of microcystin toxins within a biologically active sand filter |
Author: | Ho, L. Meyn, T. Keegan, A. Hoefel, D. Brookes, J. Saint, C. Newcombe, G. |
Citation: | Water Research, 2006; 40(4):768-774 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2006 |
ISSN: | 0043-1354 1879-2448 |
Statement of Responsibility: | Lionel Ho, Thomas Meyn, Alexandra Keegan, Daniel Hoefel, Justin Brookes, Christopher P. Saint and Gayle Newcombe |
Abstract: | Microcystin toxins are a problem for water authorities as they are recalcitrant to conventional water treatment. In this study, biological sand filtration was assessed in laboratory column experiments for its ability to remove two microcystin analogues, microcystin-LR and microcystin-LA. A lag period of 3 days was evident prior to the commencement of degradation. Contact times were varied during the experiment; however, no microcystin was detected in the effluent after 4 days, even under conditions similar to those of a rapid sand filter. Removals of microcystin through the sand filters were shown to be primarily through biological degradation processes. Using polymerase chain reaction (PCR), biofilm, extracted from one of the sand filters that had effectively removed the microcystins, was shown to contain bacteria with the mlrA gene. Detection of this gene provided additional evidence that biological degradation of microcystin was the primary removal mechanism. |
Keywords: | Biological sand filtration Degradation Microcystin MlrA gene Polymerase chain reaction |
Description: | Copyright © 2006 Elsevier Ltd All rights reserved. |
DOI: | 10.1016/j.watres.2005.12.009 |
Published version: | http://dx.doi.org/10.1016/j.watres.2005.12.009 |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications Environment Institute Leaders publications |
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