The Occurrence of Potential Harmful Cyanobacteria and Cyanotoxins in the Obrzyca River (Poland), a Source of Drinking Water

Czyżewska, Wanda; Piontek, Marlena; Łuszczyńska, Katarzyna

doi:10.3390/toxins12050284

Cited by 18 publications

(19 citation statements)

References 48 publications

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“…CYN, a toxic metabolite from cyanobacteria, has come to light in recent years because of its global occurrence, bioaccumulation, and multi-organ toxicity. − CYN is extraordinarily soluble in water and is not only biologically refractory , but chemically stable under natural environmental conditions. , Accordingly, CYN as a serious contaminant prevails in waters from subtropical areas and inland waters, even in drinking water reservoirs and rivers. ,, Especially, the occurrence of CYN in drinking water sources makes its removal a great challenge for drinking water plants . Our previous study showed that BiOBr could oxidize CYN under visible-light irradiation but its h Br 4p + was not high enough to oxidize H 2 O, generating • OH radicals, and only 12.9% of CYN was adsorbed on the BiOBr surface at adsorption equilibrium .…”

Section: Introductionmentioning

confidence: 99%

Specific Adsorption and Efficient Degradation of Cylindrospermopsin on Oxygen-Vacancy Sites of BiOBr

Shi

Huang

et al. 2022

ACS Catal.

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The oxygen-vacancy (OV)-rich BiOBr exhibits higher photocatalytic activity than that of the OV-deficient one. The interaction of the target substrate with the surface OV sites should be essential for the high activity, but it is not well understood so far. Here, we used a cyanotoxin cylindrospermopsin (CYN) as a model substrate to investigate the specific adsorption of pollutants with highly hydrophilic groups on OV sites of BiOBr. We found that the adsorption of CYN on BiOBr with rich OVs is much stronger than the adsorption on BiOBr with poor OVs, and the BiOBr with rich OVs also exhibits a higher degradation rate of CYN. Various experiments indicated that the strong adsorption of CYN on OV-rich BiOBr originates from the strong interaction between the highly hydrophilic sulfate group of CYN and OV sites. Density functional theory calculations suggest that, on OV sites, Bronsted acid sites (OH B ) are formed through the dissociative adsorption of water molecules. The combining effect of the hydrogen bonding with these OH B and the coordination with the Lewis acid Bi sites make the adsorption of the sulfate group quite strong. Such a strong interaction can well explain the rapid degradation of CYN, which proceeds through direct oxidation by h + or by the OH B -derived • OH. Based on ultra-performance liquid chromatography−tandem mass spectrometry analysis, the CYN degradation begins via hydroxylation at the C5−C6 double bond in the uracil ring by • OH, which is further degraded by two pathways. This work provides a deeper understanding of the critical roles of OVs in the processes of adsorption and photocatalysis for organic pollutant removal.

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Section: Introductionmentioning

confidence: 99%

Specific Adsorption and Efficient Degradation of Cylindrospermopsin on Oxygen-Vacancy Sites of BiOBr

Shi

Huang

et al. 2022

ACS Catal.

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“…However, different geographical origins, species and environmental factors might influence which congeners are more abundant. Analysis of the most common congeners during monitoring is therefore still advisable [20,[53][54][55]71,76,77,85,86].…”

Section: Discussionmentioning

confidence: 99%

A Summer of Cyanobacterial Blooms in Belgian Waterbodies: Microcystin Quantification and Molecular Characterizations

Hassel

Andjelković

Durieu

et al. 2022

Toxins

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In the context of increasing occurrences of toxic cyanobacterial blooms worldwide, their monitoring in Belgium is currently performed by regional environmental agencies (in two of three regions) using different protocols and is restricted to some selected recreational ponds and lakes. Therefore, a global assessment based on the comparison of existing datasets is not possible. For this study, 79 water samples from a monitoring of five lakes in Wallonia and occasional blooms in Flanders and Brussels, including a canal, were analyzed. A Liquid Chromatography with tandem mass spectrometry (LC-MS/MS) method allowed to detect and quantify eight microcystin congeners. The mcyE gene was detected using PCR, while dominant cyanobacterial species were identified using 16S RNA amplification and direct sequencing. The cyanobacterial diversity for two water samples was characterized with amplicon sequencing. Microcystins were detected above limit of quantification (LOQ) in 68 water samples, and the World Health Organization (WHO) recommended guideline value for microcystins in recreational water (24 µg L−1) was surpassed in 18 samples. The microcystin concentrations ranged from 0.11 µg L−1 to 2798.81 µg L−1 total microcystin. For 45 samples, the dominance of the genera Microcystis sp., Dolichospermum sp., Aphanizomenon sp., Cyanobium/Synechococcus sp., Planktothrix sp., Romeria sp., Cyanodictyon sp., and Phormidium sp. was shown. Moreover, the mcyE gene was detected in 75.71% of all the water samples.

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“…Cyanobacteria, also known as blue-green algae, occur spontaneously in freshwater [2]. There have been several reports on the toxicity of cyanobacterial bloom in surface waters worldwide [3], [4], [5],[6], [7],[8], [9], [10]. These microbes use the energy of sunlight and x inert atmospheric nitrogen into usable nitrates that can be absorbed by plants [11].…”

Section: Introductionmentioning

confidence: 99%

Detection of Microcystins in South African surface waters by high performance liquid chromatography in the light of Quality by Design statical tool.

Mthembu

Govender

Hendricks

et al. 2023

Preprint

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Cyanobacteria, an algae bloom that is responsible for the creation of deadly toxins. These toxins have the potential to adversely impact human and animal health. Microcystins (MC’s), are harmful toxins that are produced by cyanobacteria species. These deadly toxins are the most investigated toxins worldwide. However, in South Africa their occurrence statistics are deficient due to inaccessibility of reliable, sensitive, and precise analytical methods to investigate them in water surfaces. Thus, a development of analytical methods for the detection and accurate quantification of algal toxins is crucial to consider the health risk of exposure to toxins in wastewater and surface waters. This study recommends an analytical method for the detection and quantification of algal toxins using solid phase extraction (SPE) and high-performance liquid chromatography (HPLC) coupled with photodiode detector (PDA). The developed method was validated based on linearity which ranged from 3–2500 µg L− 1, recoveries at 99.6–113.9%, the limit of detection (LOD) ranging from 0.2–480 µg L− 1, and limit of quantification (LOQ) at 0.7–160 µg L− 1 and the regression coefficients obtained were above 0.9880 in all analytes. The developed method was applied to Darvill Wastewater Treatment Plant, Umgeni water, Durban surface waters, University of KwaZulu-Natal (UKZN) sport centre tap water and UKZN Westville two ponds), South Africa. MC-RR was the most detected analyte at concentration ranging from 0.069–30.521 ng L− 1 compared to other targeted MCs. The developed method is simple and cheap, which can consent developing countries to monitor these deadly MC toxins in water surfaces.

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The Occurrence of Potential Harmful Cyanobacteria and Cyanotoxins in the Obrzyca River (Poland), a Source of Drinking Water

Cited by 18 publications

References 48 publications

Specific Adsorption and Efficient Degradation of Cylindrospermopsin on Oxygen-Vacancy Sites of BiOBr

Specific Adsorption and Efficient Degradation of Cylindrospermopsin on Oxygen-Vacancy Sites of BiOBr

A Summer of Cyanobacterial Blooms in Belgian Waterbodies: Microcystin Quantification and Molecular Characterizations

Detection of Microcystins in South African surface waters by high performance liquid chromatography in the light of Quality by Design statical tool.

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