Efficient removal of microcystin-LR by UV-C/H2O2 in synthetic and natural water samples

He, Xuexiang; Pelaez, Miguel; Westrick, Judy A.; Ο'Shea, Kevin Ε.; Hiskia, Anastasia; Triantis, Theodoros M.; Kaloudis, Triantafyllos; Stefan, Mihaela I.; Cruz, Armah A. de la; Dionysiou, Dionysios D.

doi:10.1016/j.watres.2011.11.009

Cited by 216 publications

(82 citation statements)

References 59 publications

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“…By the way, the target organ of H 2 O 2 was not only protein (D1), but also the polypeptide (MC-LR). An addition of H 2 O 2 led to higher removal efficiency of MC (He et al, 2012) due to its strong photocatalytic oxidation of MC-LR and detoxification of the MC solutions (Cornish et al, 2000). Similar results also occurred in this study, which indicated H 2 O 2 could be used in bloom control and MC removal treatment.…”

Section: Discussionsupporting

confidence: 85%

The combined effects of UV-C radiation and H 2 O 2 on Microcystis aeruginosa , a bloom-forming cyanobacterium

Wang

et al. 2015

Chemosphere

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Section: Discussionsupporting

confidence: 85%

The combined effects of UV-C radiation and H 2 O 2 on Microcystis aeruginosa , a bloom-forming cyanobacterium

Wang

et al. 2015

Chemosphere

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“…A provisional guideline value of 1 lg l -1 has been adopted by the World Health Organization (WHO) for microcystin-LR in drinking water (Chorus and Bartram 1999). The potential toxin production of cyanobacteria makes cyanobacterial dominance in drinking water reservoirs undesirable, since it might require an extra purification process to degrade the cells and toxins, for instance by ozone or chlorination (see ''Biomass removal'' section), or peroxide and/or UV treatment (Cornish et al 2000;He et al 2012). Moreover, large cyanobacterial biomasses may cause anoxia near the sediment of stratified reservoirs, which could induce the internal loading of several toxic metals [e.g., manganese (Du 2004)], threatening drinking water quality.…”

Section: Ecological Targetsmentioning

confidence: 99%

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

Stroom

Kardinaal

2016

Aquat Ecol

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Water managers worldwide are facing the serious problem of dense blooms of cyanobacteria in surface waters. In the quest for the optimal method to combat cyanobacterial dominance, many questions and many possible solutions arise. This paper presents a three-phase strategy to fight harmful cyanobacterial proliferation. Water managers who apply this strategy can generate a tailor-made set of measures. The three phases consist of (1) defining the ecological water quality targets of the waterbody in question, (2) assessing its current ecological state, and (3) selecting which measures will yield optimal results. The paper provides assistance in the quantitative diagnosis of the state of both shallow and deep temperate freshwater lakes by means of a lake system analysis, and presents a survey of measures. Measures are divided into two sets. Preventive measures are based on switching to a clear state (shallow lake) or reducing the overall cyanobacterial biomass (deep lake). They are subdivided into nutrient reduction, hydromorphological adjustments, and food web management. Concerning nutrient reduction, in many situations phosphorus management alone should suffice. Nitrogen management can be important to increase the species diversity of macrophytes, or to relieve downstream (marine) consequences. Control measures (including mitigation) have a direct impact on cyanobacterial blooms by biomass removal, flushing, or mixing; however, the number of proven technologies is limited.

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“…The incident photon flux of UV light through the reaction solution was measured with the iodide/iodate actinometry (He et al, 2012;Rahn, 1997). The iodideiodate chemical actinometer exposed to UV light below 290 nm forms triiodide (I 3 -), which was determined spectrophotometrically and used to calculate the UV intensity.…”

Section: Photochemical Proceduresmentioning

confidence: 99%

Factors Influencing the Ferric Ion-mediated Photochemical Decomposition of Perfluorooctane Sulfonate (PFOS) in Water

Jin

Zhang

Shao

2015

Journal of Advanced Oxidation Technologies

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Abstract:Perfluorooctane sulfonate (PFOS) has received increasing attention due to its persistence in the environment, accumulation and global occurrence. The enhancement of the photochemical oxidative degradation of perfluorooctane sulfonate upon addition of ferric ions under 254-nm UV and 185-nm vacuum UV (VUV) light was observed for the first time. In the presence of ferric ions (100μM) and at pH 3.0, 85.3% of the initial PFOS (20 μM) was decomposed, with the rate constant of 1.92 d -1, and the defluorination ratio reached 47.5% within 24 h under 254-nm UV irradiation. The influences of the ferric ion concentration, the solution pH and the UV wavelength on the PFOS photodecomposition were investigated. In addition, the photochemical decomposition of PFOS in the secondary effluent from a municipal wastewater plant was investigated. The coexisting organic matter in the secondary effluent greatly reduced the PFOS decomposition rate to less than 1/3 of that in pure water under 254-nm UV irradiation. However, under 185-nm VUV light the coexisting organic matter could be quickly degraded, and accordingly their adverse impacts could be largely eliminated. Moreover, the influences of initial PFOS concentration in the secondary effluent was examined under UV 254 or UV 254+185 light in the presence of ferric ions (100μM), PFOS at a lower concentration (2 μM) decomposed much faster than that at a higher concentration (20 μM), and its decomposition intermediates, i.e., C2-C7 perfluorinated carboxylic acids, could also be decomposed and mineralized.

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Efficient removal of microcystin-LR by UV-C/H2O2 in synthetic and natural water samples

Cited by 216 publications

References 59 publications

The combined effects of UV-C radiation and H 2 O 2 on Microcystis aeruginosa , a bloom-forming cyanobacterium

The combined effects of UV-C radiation and H 2 O 2 on Microcystis aeruginosa , a bloom-forming cyanobacterium

How to combat cyanobacterial blooms: strategy toward preventive lake restoration and reactive control measures

Factors Influencing the Ferric Ion-mediated Photochemical Decomposition of Perfluorooctane Sulfonate (PFOS) in Water

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