Laboratory desalination experiments with some algal toxins

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DOIResolve DOI: http://doi.org/10.1016/j.desal.2012.02.014
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TypeArticle
Journal titleDesalination
Volume293
Pages16; # of pages: 6
SubjectHAB toxins; red tide; detoxification; saxitonxin; domoic acid; okadaic acid; brevetoxins
AbstractOver the last several decades, countries throughout the world have experienced an escalating and worrisome trend in the incidence of harmful algal blooms (HABs). A concern is that highly potent algal toxins might be retained in the treated water, posing a threat to human health. Seawater contaminated with saxitoxins, domoic acid, okadaic acid, and brevetoxins was desalinated using small (b100 mL capacity) reverse osmosis and distillation equipment. Analyses of desalinated water samples indicated efficient removal of the four toxins to greater than 99%, except brevetoxins for which some carry-over was observed during distillation. Hypochlorite concentrations of 4 ppm or higher were sufficient to react with all of the saxitoxins, domoic acid and okadaic acid in the samples that contained initial toxin concentrations up to 1250 ng mL⁻¹ Brevetoxins appeared to be unaffected in experiments in which the toxins were exposed to up to 30 ppm hypochlorite in seawater at 35 °C for 60 min. These results and their implications in terms of desalination plant design and operation are discussed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Marine Biosciences
Peer reviewedYes
NRC number51800
NPARC number21268166
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Record identifier2c0045b3-6d2e-4e26-abff-624264363223
Record created2013-05-15
Record modified2016-05-09
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