Effects of hydrogen peroxide on cyanobacteria and microcystins in irrigation water.

A new paper by Spoof et al. in Environmental Science and Pollution Research reports a series of experiments where lysis of cyanobacteria in abstracted lake water was induced by the use of hydrogen peroxide.

From the abstract:

This paper reports a series of experiments where lysis of cyanobacteria in abstracted lake water was induced by the use of hydrogen peroxide and the fate of released MCs was followed. The hydrogen peroxide–treated water was then used for spray irrigation of cultivated spinach and possible toxin accumulation in the plants was monitored. The water abstracted from Lake Köyliönjärvi, SW Finland, contained fairly low concentrations of intracellular MC prior to the hydrogen peroxide treatment (0.04 μgL −1 in July to 2.4 μgL −1 in September 2014). Hydrogen peroxide at sufficient doses was able to lyse cyanobacteria efficiently but released MCs were still present even after the application of the highest hydrogen peroxide dose of 20 mg L−1. No traces of MC were detected in the spinach leaves. The viability of moving phytoplankton and zooplankton was also monitored after the application of hydrogen peroxide. Hydrogen peroxide at 10 mg L−1 or higher had a detrimental effect on the moving phytoplankton and zooplankton.

The paper acknowledges CYANOCOST.

Reference:

Spoof, L., Jaakkola, S., Važić, T. Važić, T., Häggqvist, K., Kirkkala, T., Ventelä, A-M., Kirkkala, T., Svirčev, Z., Meriluoto, J. Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment. Environ Sci Pollut Res (2020). https://doi.org/10.1007/s11356-019-07476-x

“Mitigation of cyanobacteria in lakes by dilute hydrogen peroxide”- Dr Petra Visser at NCSR Demokritos

Dr Petra Visser is giving a lecture on “Mitigation of cyanobacteria in lakes by dilute hydrogen peroxide” in the Library Hall of NCSR Demokritos, on 21st March 2019 at 13:00.

Dr Petra Visser is Associate Professor in the Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam. Her research interests include physiology and ecology of cyanobacteria and algae, toxic cyanobacteria, eutrophication, water management, macroalgae, benthic cyanobacterial mats, coral reefs. She has carried out pioneering work on the use of hydrogen peroxide for selective suppression of harmful cyanobacteria in entire lakes. Among others, she has been Leader of the Working Group “Prevention and Control of Toxic Cyanobacteria and Cyanotoxins” of the CYANOCOST network and Editor of a recent Special Issue on “Cyanobacterial blooms – Ecology, prevention, mitigation and control” in Aquatic Ecology.

Description of the event