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

Sinha, Amit Kumar; Eggleton, Michael A.; Lochmann, Rebecca

doi:10.1016/j.scitotenv.2018.05.023

Cited by 50 publications

(40 citation statements)

References 57 publications

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“…Clearly the SCP concentrations used in our trials were too low for effective control of cyanobacterial populations. Sinha, Eggleton, and Lochmann () conducted a larger, longer study to evaluate the effects of higher SCP treatment rates on phytoplankton communities in fertilized fishponds in Arkansas. They initially conducted range‐finding tests in small (75‐L) limnocorrals treated with 5.6, 7.4, 9.3, 11.1, 13.0, 14.8, 18.5, and 29.6 mg/L SCP (1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0 and 8.0 mg/L H 2 O 2 , respectively).…”

Section: Treating Existing Cyanobacterial Off‐flavorsmentioning

confidence: 99%

Off‐flavors in pond‐grown ictalurid catfish: Causes and management options

Tucker

Schrader

2019

J World Aquaculture Soc

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Ictalurid catfish grown in ponds often acquire undesirable off-flavors prior to harvest. Off-flavors develop when odorous, lipophilic substances in food or water are absorbed across gut or gill epithelium and concentrated in edible tissues. The most common causes of catfish off-flavors are two nontoxic secondary metabolites of planktonic cyanobacteria: geosmin (causing an earthy off-flavor) and 2-methylisoborneol (causing a musty off-flavor). Offflavored fish are unacceptable for processing, and harvest must be postponed until the source of the odorous compound disappears and the compound purges from edible fish tissue. Harvest delays caused by episodes of off-flavor increase production time, interrupt cash flow, and increase the risk of fish loss. Catfish farmers consider off-flavor to be one of their most important production-related problems. This paper reviews the causes of off-flavor in catfish, pharmacokinetics of uptake and loss of odorous compounds in catfish, seasonality and prevalence of off-flavors, farm-and industry-level impacts, the ecology of cyanobacteria in catfish ponds, and various strategies for preventing or treating cyanobacterial (and other) off-flavors. A decision-making system based on knowledge gained from research is presented as a guide to effective use of the limited tools available to manage off-flavors. K E Y W O R D S 2-methylisoborneol, blue-green algae, catfish, cyanobacteria, geosmin, off-flavor

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Section: Treating Existing Cyanobacterial Off‐flavorsmentioning

confidence: 99%

Off‐flavors in pond‐grown ictalurid catfish: Causes and management options

Tucker

Schrader

2019

J World Aquaculture Soc

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“…Various methods have been explored for the removal of cyanobacteria, including sonication, ultraviolet radiation, electrocatalysis, flocculation, allelochemicals, and algaecides, among which the algaecides are practical management interventions due to their convenience and cost savings (Sinha et al. ). Hydrogen peroxide (H 2 O 2 ) is an efficient algaecide that inhibits cyanobacterial growth by inhibiting the synthesis of chlorophyll a and phycocyanin and reducing the photosynthetic activity (Chen et al.…”

mentioning

confidence: 99%

“…After application, H 2 O 2 is degraded into water and oxygen, causing no secondary pollution in aquatic environments (Sinha et al. , Yang et al. ).…”

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confidence: 99%

“…Key index words: algaecide; antioxidant responses; cyanobacteria; growth; microcystins; pigments Abbreviations: GST, Glutathione S-transferase; MCs, Microcystins; MDA, Malondialdehyde; PE, Percentage of the extracellular microcystins; ROS, Reactive oxygen species; SOD, Superoxide dismutase Cyanobacterial blooms cause hypoxia in aquatic environments and off-flavor in aquaculture conditions and release cyanotoxins that threaten aquatic organisms and human health, all of which have become significant ecological problems (Meng et al 2015). Various methods have been explored for the removal of cyanobacteria, including sonication, ultraviolet radiation, electrocatalysis, flocculation, allelochemicals, and algaecides, among which the algaecides are practical management interventions due to their convenience and cost savings (Sinha et al 2018). Hydrogen peroxide (H 2 O 2 ) is an efficient algaecide that inhibits cyanobacterial growth by inhibiting the synthesis of chlorophyll a and phycocyanin and reducing the photosynthetic activity (Chen et al 2016).…”

mentioning

confidence: 99%

“…Hydrogen peroxide (H 2 O 2 ) is an efficient algaecide that inhibits cyanobacterial growth by inhibiting the synthesis of chlorophyll a and phycocyanin and reducing the photosynthetic activity (Chen et al 2016). After application, H 2 O 2 is degraded into water and oxygen, causing no secondary pollution in aquatic environments (Sinha et al 2018, Yang et al 2018. The herbicide glyphosate is another commonly used algaecide with a low toxicity to aquatic organisms, which also restrains the photosynthetic rate in cyanobacteria and consequently results in growth inhibition (Vannini et al 2015).…”

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confidence: 99%

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Influence of mixed antibiotics on Microcystis aeruginosa during the application of glyphosate and hydrogen peroxide algaecides

Liu

Zhang

et al. 2019

Journal of Phycology

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Antibiotics regulate various physiological functions in cyanobacteria and may interfere with the control of cyanobacterial blooms during the application of algaecides. In this study, Microcystis aeruginosa was exposed to H2O2 and glyphosate for 7 d in the presence of coexisting mixed antibiotics (amoxicillin, spiramycin, tetracycline, ciprofloxacin, and sulfamethoxazole) at an environmentally relevant concentration of 100 ng · L−1. The mixed antibiotics significantly (P < 0.05) alleviated the growth inhibition effect of 15–45 μM H2O2 and 40–60 mg · L−1 glyphosate. According to the increased contents of chlorophyll a and protein, decreased content of malondialdehyde, and decreased activities of superoxide dismutase and glutathione S‐transferase, antibiotics may reduce the toxicity of the two algaecides through the stimulation of photosynthesis and the reduction in oxidative stress. The presence of coexisting antibiotics stimulated the production and release of microcystins in the M. aeruginosa exposed to low concentrations of algaecides and posed an increased threat to aquatic environments. To eliminate the secondary pollution caused by microcystins, high algaecide doses that are ≥45 μM for H2O2 and ≥60 mg · L−1 for glyphosate are recommended. This study provides insights into the ecological hazards of antibiotic contaminants and the best management practices for cyanobacterial removal under combined antibiotic pollution conditions.

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