NDLI: Using H$_{2}$O$_{2}$ treatments for the degradation of cyanobacteria and microcystins in a shallow hypertrophic reservoir

Content Provider	Springer Nature Link
Author	Papadimitriou, Theodoti Kormas, Konstantis Dionysiou, Dionysios D. Laspidou, Chrysi
Copyright Year	2016
Abstract	Toxins produced by cyanobacteria in freshwater ecosystems constitute a serious health risk worldwide for humans that may use the affected water bodies for recreation, drinking water, and/or irrigation. Cyanotoxins have also been deemed responsible for loss of animal life in many places around the world. This paper explores the effect of H$_{2}$O$_{2}$ treatments on cyanobacteria and microcystins in natural samples from a hypertrophic reservoir in microcosm experiments. According to the results, cyanobacteria were more easily affected by H$_{2}$O$_{2}$ than by other phytoplanktonic groups. This was shown by the increase in the fractions of chlorophyll-a (a proxy for phytoplankton) and chlorophyll-b (a proxy for green algae) over total phytoplankton pigments and the decrease in the fraction of phycocyanin (a proxy for cyanobacteria) over total phytoplankton pigments. Thus, while an overall increase in phytoplankton occurred, a preferential decrease in cyanobacteria was observed with H$_{2}$O$_{2}$ treatments over a few hours. Moreover, significant degradation of total microcystins was observed under H$_{2}$O$_{2}$ treatments, while more microcystins were degraded when UV radiation was used in combination with H$_{2}$O$_{2}$. The combination of H$_{2}$O$_{2}$ and ultraviolet (UV) treatment in natural samples resulted in total microcystin concentrations that were below the World Health Organization limit for safe consumption of drinking water of 1 μg/L. Although further investigation into the effects of H$_{2}$O$_{2}$ addition on ecosystem function must be performed, our results show that the application of H$_{2}$O$_{2}$ could be a promising method for the degradation of microcystins in reservoirs and the reduction of public health risks related to the occurrence of harmful algal blooms.
Starting Page	21523
Ending Page	21535
Page Count	13
File Format	PDF
ISSN	09441344
Journal	Environmental Science and Pollution Research
Volume Number	23
Issue Number	21
e-ISSN	16147499
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-08-11
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	H$_{2}$O$_{2}$ UV Microcystins Harmful algal blooms Reservoir Phycocyanin Phytoplankton pigments Environment Environmental Chemistry Ecotoxicology Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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