Investigations into the biodegradation of microcystin-LR in wastewaters

Ho, Lionel; Hoefel, Daniel; Palazot, Sebastien; Sawade, Emma; Newcombe, Gayle; Saint, Christopher P.; Brookes, Justin D.

doi:10.1016/j.jhazmat.2010.04.081

Cited by 61 publications

(36 citation statements)

References 35 publications

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“…Cyanobacteria are a common occurrence in waste stabilisation ponds (WSPs), a suspended growth biological treatment technology used in outdoor municipal wastewater treatment plants (WWTPs) (Furtado et al, 2009;Ho et al, 2010;Martins et al, 2011;Vasconcelos and Pereira, 2001). Several genera produce toxins, including microcystins, which pose a significant health risk to humans and animals.…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen peroxide promotes cell lysis, and if cyanotoxins are not degraded by the chemical itself, their degradation by natural mechanisms is of significance. It has been demonstrated that the bacteria found in activated sludge effluent (produced during wastewater treatment) are able to degrade cyanotoxins, particularly microcystin species (Ho et al, 2010;Lam et al, 1995). In particular, Ho et al (2010) compared the degradation rates of dissolved microcystins in both fresh activated sludge treated effluent and axenic tertiary-activated sludge treated effluent within the laboratory.…”

Section: Introductionmentioning

confidence: 99%

“…It has been demonstrated that the bacteria found in activated sludge effluent (produced during wastewater treatment) are able to degrade cyanotoxins, particularly microcystin species (Ho et al, 2010;Lam et al, 1995). In particular, Ho et al (2010) compared the degradation rates of dissolved microcystins in both fresh activated sludge treated effluent and axenic tertiary-activated sludge treated effluent within the laboratory. Ho et al (2010) determined that indigenous bacteria in WSPs are capable of degrading microcystins within days.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Ho et al (2010) compared the degradation rates of dissolved microcystins in both fresh activated sludge treated effluent and axenic tertiary-activated sludge treated effluent within the laboratory. Ho et al (2010) determined that indigenous bacteria in WSPs are capable of degrading microcystins within days. This study also found that there was little reduction of microcystins in sterilised water, indicating that under laboratory conditions, biodegradation processes are more likely to remove microcystins than physical processes (Ho et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Ho et al (2010) determined that indigenous bacteria in WSPs are capable of degrading microcystins within days. This study also found that there was little reduction of microcystins in sterilised water, indicating that under laboratory conditions, biodegradation processes are more likely to remove microcystins than physical processes (Ho et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Barrington

Ghadouani

Ivey

2013

Hydrol. Earth Syst. Sci.

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Abstract. Cyanobacteria and cyanotoxins are a risk to human and ecological health, and a hindrance to biological wastewater treatment. This study investigated the use of hydrogen peroxide (H 2 O 2 ) for the removal of cyanobacteria and cyanotoxins from within waste stabilization ponds (WSPs). The daily dynamics of cyanobacteria and microcystins (commonly occurring cyanotoxins) were examined following the addition of H 2 O 2 to wastewater within both the laboratory and at the full scale within a maturation WSP, the final pond in a wastewater treatment plant. Hydrogen peroxide treatment at concentrations ≥ 0.1 mg H 2 O 2 µg −1 total phytoplankton chlorophyll a led to the lysis of cyanobacteria, in turn releasing intracellular microcystins to the dissolved state. In the full-scale trial, dissolved microcystins were then degraded to negligible concentrations by H 2 O 2 and environmental processes within five days. A shift in the phytoplankton assemblage towards beneficial Chlorophyta species was also observed within days of H 2 O 2 addition. However, within weeks, the Chlorophyta population was significantly reduced by the re-establishment of toxic cyanobacterial species. This re-establishment was likely due to the inflow of cyanobacteria from ponds earlier in the treatment train, suggesting that whilst H 2 O 2 may be a suitable short-term management technique, it must be coupled with control over inflows if it is to improve WSP performance in the longer term.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Barrington

Ghadouani

Ivey

2013

Hydrol. Earth Syst. Sci.

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Biological Treatment for the Destruction of Cyanotoxins

Dziga

Nybom

Gągała

et al. 2020

Water Treatment for Purification From Cyanobacteria and Cyanotoxins

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Direct Electrochemical Nano‐immunosensor for Microcystin‐LR in Seawater

et al. 2018

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Microcystins are potent hepatotoxins produced by cyanobacteria, which proliferate in wastewaters with high nutrient content. Due to their high toxicity and potential risk to human health, even at low concentrations, the development of a sensitive and rapid method for the monitoring of microcystin‐LR (MC‐LR) in water samples is of great importance. In this context, a new direct electrochemical nano‐immunosensor for MC‐LR detection using the liquid crystal (E)‐1‐decyl‐4‐[(4‐decyloxyphenyl)diazenyl]pyridinium bromide (Br‐Py) as a redox probe and gold nanoparticles stabilized in bovine serum albumin (AuNP‐BSA) is described herein. The microcystin‐LR antibody (anti‐MC‐LR) was covalently immobilized using N‐(3‐dimethylaminopropyl)‐N‐ethylcarbodiimide hydrochloride (EDC) and N‐hydroxysuccinimide (NHS) on an AuNP‐BSA/BrPy film. The proposed sensor response is based on the inhibition of the Br‐Py electrochemical signal after the specific interaction of MC‐LR with immobilized anti‐MC‐LR on the electrode surface. The electrochemical behavior of the immunosensor was studied by square‐wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS). Under optimized conditions, using SWV and an incubation time of 15 min, the immunosensor exhibits a linear response to MC‐LR concentrations of 0.05 to 500.0 ng mL−1 with a detection limit of 0.05 ng mL−1. The anti‐MC‐LR/AuNP‐BSA/Br‐Py/GCE was successfully applied in the determination of MC‐LR in spiked seawater samples.

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Investigations into the biodegradation of microcystin-LR in wastewaters

Cited by 61 publications

References 35 publications

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Cyanobacterial and microcystins dynamics following the application of hydrogen peroxide to waste stabilisation ponds

Biological Treatment for the Destruction of Cyanotoxins

Direct Electrochemical Nano‐immunosensor for Microcystin‐LR in Seawater

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