An environmentally friendly approach for mitigating cyanobacterial bloom and their toxins in hypereutrophic ponds: Potentiality of a newly developed granular hydrogen peroxide-based compound

The Science of the Total Environment
Amit Kumar SinhaRebecca T Lochmann

Abstract

Cyanobacterial blooms and their associated toxins are growing issues for many aquatic resources, and pose a major threat to human health and ecological welfare. To control cyanobacterial blooms and their toxins, the efficacy of a newly developed granular compound (sodium carbonate peroxyhydrate 'SCP', trade name 'PAK® 27' algaecide) containing hydrogen peroxide (H2O2) as the active ingredient was investigated. First, the dose efficacy of the SCP that corresponded to 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0 and 8.0 mg/L H2O2 was tested for 10 days in small-scale tanks installed in 0.1-acre experimental hypereutrophic ponds dominated by blooms of the toxic cyanobacterium Planktothrix sp. SCP ranging from 2.5-4.0 mg/L H2O2 selectively killed Planktothrix sp. without major impacts on either eukaryotic phytoplankton (e.g., diatom Synedra sp., green algae Spirogyra sp. and Cladophora sp.) or zooplankton (e.g., rotifers Brachionus sp. and cladocerans Daphnia sp.). Based on these results, SCP at 2.5 mg/L and 4.0 mg/L H2O2 were homogeneously introduced into entire water volume of the experimental ponds in parallel with untreated control ponds. The dynamics of cyanobacterium Planktothrix sp., microcystins (commonly occurring cyanotoxins), eukar...Continue Reading

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Citations

Jul 24, 2020·Environmental Science and Pollution Research International·Jing YeChao Xu
Dec 16, 2020·The Science of the Total Environment·Sivakumar Subpiramaniyam
Feb 14, 2021·Environmental Science and Pollution Research International·Riley P BuleyAlan E Wilson

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