Jump to main content
Jump to site search

Issue 2, 2012
Previous Article Next Article

Monitoring of potentially toxic cyanobacteria using an online multi-probe in drinking water sources

Author affiliations

Abstract

Toxic cyanobacteria threaten the water quality of drinking water sources across the globe. Two such water bodies in Canada (a reservoir on the Yamaska River and a bay of Lake Champlain in Québec) were monitored using a YSI 6600 V2-4 (YSI, Yellow Springs, Ohio, USA) submersible multi-probe measuring in vivophycocyanin (PC) and chlorophyll-a (Chl-a) fluorescence, pH, dissolved oxygen, conductivity, temperature, and turbidity in parallel. The linearity of the in vivo fluorescence PC and Chl-a probe measurements were validated in the laboratory with Microcystis aeruginosa (r2 = 0.96 and r2 = 0.82 respectively). Under environmental conditions, in vivo PC fluorescence was strongly correlated with extracted PC (r = 0.79) while in vivoChl-a fluorescence had a weaker relationship with extracted Chl-a (r = 0.23). Multiple regression analysis revealed significant correlations between extracted Chl-a, extracted PC and cyanobacterial biovolume and in vivo fluorescence parameters measured by the sensors (i.e. turbidity and pH). This information will help water authorities select the in vivo parameters that are the most useful indicators for monitoring cyanobacteria. Despite highly toxic cyanobacterial bloom development 10 m from the drinking water treatment plant's (DWTP) intake on several sampling dates, low in vivo PC fluorescence, cyanobacterial biovolume, and microcystin concentrations were detected in the plant's untreated water. The reservoir's hydrodynamics appear to have prevented the transport of toxins and cells into the DWTP which would have deteriorated the water quality. The multi-probe readings and toxin analyses provided critical evidence that the DWTP's untreated water was unaffected by the toxic cyanobacterial blooms present in its source water.

Graphical abstract: Monitoring of potentially toxic cyanobacteria using an online multi-probe in drinking water sources

Back to tab navigation

Publication details

The article was received on 10 Oct 2011, accepted on 10 Nov 2011 and first published on 12 Dec 2011


Article type: Paper
DOI: 10.1039/C1EM10819K
Citation: J. Environ. Monit., 2012,14, 579-588
  •   Request permissions

    Monitoring of potentially toxic cyanobacteria using an online multi-probe in drinking water sources

    A. Zamyadi, N. McQuaid, M. Prévost and S. Dorner, J. Environ. Monit., 2012, 14, 579
    DOI: 10.1039/C1EM10819K

Search articles by author

Spotlight

Advertisements