Taming Toxic Algae Blooms

Pelley, Janet

doi:10.1021/acscentsci.6b00129

Cited by 15 publications

(10 citation statements)

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“…Over the last few years a number of high profile cyanobacterial bloom incidents, some of which contained toxin concentrations of concern to the general public, have occurred in the USA. In addition to the microcystin-containing bloom in Florida, a large cyanobacterial bloom caused closures in Utah Lake, Provo, Utah (Brooks et al, 2017) and the occurrence of a large bloom of Microcystis on Lake Erie shut down a water treatment plant and resulted in the provision of bottled water to the residents of Toledo, Ohio (Pelley, 2016). The government of Ohio had a HAB management document in place with threshold toxin values for microcystins, cylindrospermopsin, anatoxin-a, and saxitoxins specified within the document (Ohio EPA, 2016).…”

Section: Implications For Best Practices Elsewherementioning

confidence: 99%

Public health responses to toxic cyanobacterial blooms: perspectives from the 2016 Florida event

et al. 2018

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In June 2016, massive cyanobacterial blooms occurred in the St. Lucie River in Florida, caused by nutrient and cyanobacterial-laden water releases from Lake Okeechobee. We independently collected and analyzed bloom material for cyanotoxin diversity and concentrations. The concentrations of microcystins, potent hepatotoxins, present in the bloom material greatly exceeded World Health Organization Guideline Values for drinking and recreational water. We also detected the neurotoxins anatoxin-a(S) and β-N-methylamino-L-alanine (BMAA). The Florida State Governor declared a state of emergency, but many affected aquatic recreational areas in St. Lucie County remained open during the bloom event without adequate hazard notification to citizens. During the bloom event, issues with preparedness, communication, sampling, analysis, closures and contingencies were observed. We suggest better ways that cyanobacterial bloom events can be predicted, managed, and mitigated in the future throughout the world. As similar problems with cyanobacterial bloom frequency and occurrence present worldwide, understanding governmental responses to the 2016 Florida incident can help in the development of effective mitigation and management strategies for future bloom events.

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Section: Implications For Best Practices Elsewherementioning

confidence: 99%

Public health responses to toxic cyanobacterial blooms: perspectives from the 2016 Florida event

et al. 2018

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“…The resulting surplus of nutrients causes eutrophication of surface and coastal waters, boosts algal growth, and creates dead zones that have significant economic and health impacts . Many algal blooms are caused by toxic blue-green algae such as microcystis that produces microcystin, a toxin that is potentially lethal to both humans and animals . Such algal blooms are now seen annually in Lake Erie.…”

Section: Introductionmentioning

confidence: 99%

Gadolinium Complex for the Catch and Release of Phosphate from Water

Harris

Nguyen

Pailloux

et al. 2017

Environ. Sci. Technol.

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The ability of complexes of hard and labile metal ions with one or more open coordination sites to capture phosphates with high affinity and selectivity directly in water at neutral pH and release them under acidic conditions is evaluated with Gadolinium- 2,2',2''-(((nitrilotris(ethane-2,1-diyl))tris(azanediyl))tris(carbonyl))tris(4-oxo-4H-pyran-3-olate) (Gd-TREN-MAM). This model lanthanide complex has two open coordination sites that, at neutral pH, are filled with water molecules. In water at neutral pH, Gd-TREN-MAM binds phosphate with high affinity (K = 1.3 × 10) via the formation of a ternary complex in which one phosphate replaces both inner-sphere water molecules. The formation of this complex is highly pH-dependent; the phosphate is completely released from Gd-TREN-MAM below pH 2. Because the Gd ion remains complexed by its ligand, even under strong acidic conditions, Gd-TREN-MAM can be used at least 10 times in a pH-based recycling scheme that enables the catch and release of one phosphate per cycle. Gd-TREN-MAM is highly selective for phosphate over other anions of environmental concerns, including HCO, HCO, CHCO, SO, NO, NO, BrO, AsO, F, Cl, and Br and, to a lesser extent, ClO. The development of such receptors that bind phosphate reversibly in a pH-dependent manner opens the possibility to design catch-and-release systems for the purification of surface waters.

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“…While the Florida Everglades is a prime target for (Pi) monitoring efforts, the impacts of phosphorus pollution in water are far more widespread. Current estimates of impacts of (Pi) contamination on the U.S. economy describe it causing losses of $2 billion per year 12 . This substantial cost is driven by expensive water treatments, falling population of aquatic species, and devaluation of properties located close to contaminated areas.…”

Section: Introductionmentioning

confidence: 99%

Smart-phone, paper-based fluorescent sensor for ultra-low inorganic phosphate detection in environmental samples

et al. 2019

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A major goal of environmental agencies today is to conduct point-of-collection monitoring of excess inorganic phosphate (Pi) in environmental water samples for tracking aquatic “dead zones” caused by algae blooms. However, there are no existing commercial devices which have been miniaturized and are suitable for the point-of-need-testing (“PONT”) that is required to fully map a large region, such as the Florida Everglades. To solve this challenge, a reflection-mode fluorescence-sensing apparatus was developed, leveraging an environmentally sensitive fluorophore (MDCC) bound to a bacterial phosphate-binding protein to generate a fluorescent optical signal proportional to the concentration of (Pi) present. The combined end-to-end integrated sensor system had a response time of only 4 s, with minimal effects of common interfering agents and a linear range spanning from 1.1 to 64 ppb. To support ease-of-use during PONT, the platform incorporated disposable wax-printed paper strip sample pads and a smartphone camera detection system. Since the EPA threshold is currently 30 ppb to prevent eutrophication, this system serves as a rapid test of whether a region is compliant.

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Taming Toxic Algae Blooms

Cited by 15 publications

References 0 publications

Public health responses to toxic cyanobacterial blooms: perspectives from the 2016 Florida event

Public health responses to toxic cyanobacterial blooms: perspectives from the 2016 Florida event

Gadolinium Complex for the Catch and Release of Phosphate from Water

Smart-phone, paper-based fluorescent sensor for ultra-low inorganic phosphate detection in environmental samples

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