·OH Treatment for Killing of Harmful Organisms in Ship’s Ballast Water with Medium Salinity Based on Strong Ionization Discharge

Zhang, Yubo; Bai, Mindong; Cao, Chen; Meng, Xiangying; Tian, Yiping; Zhang, Nahui; Yu, Zhe

doi:10.1007/s11090-013-9464-6

Cited by 24 publications

(7 citation statements)

References 15 publications

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“…The electrochemical technique is reagent free (whereby seawater serves as the electrolyte), thus minimizing the need for regular retrieval of the device. Furthermore, the production of oxidants on the electrode surface provides an intrinsic anti-fouling mechanism; indeed, electrochemical generation of hydroxyl radicals is a technique that has been successfully used to rapidly kill invasive phytoplankton species in ship's ballast water within seconds, not dissimilar to what we see in the experiments presented here (Zhitao et al 2005;Bai et al 2010Bai et al , 2012Zhang et al 2013). Given the relatively simple optics setup of our technique, compared to others, it is also likely the key components be scaled down from the current lab set-up (see Fig.…”

Section: Current Applicability Of the Methods And Recommendationsmentioning

confidence: 66%

A novel fluoro‐electrochemical technique for classifying diverse marine nanophytoplankton

Barton,

Yang,

Chen

et al. 2023

Limnology & Ocean Methods

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To broaden our understanding of pelagic ecosystem responses to environmental change, it is essential that we improve the spatiotemporal resolution of in situ monitoring of phytoplankton communities. A key challenge for existing methods is in classifying and quantifying cells within the nanophytoplankton size range (2–20 μm). This is particularly difficult when there are similarities in morphology, making visual differentiation difficult for both trained taxonomists and machine learning‐based approaches. Here we present a rapid fluoro‐electrochemical technique for classifying nanophytoplankton, and using a library of 52 diverse strains of nanophytoplankton we assess the accuracy of this technique based on two measurements at the individual level: charge required to reduce per cell chlorophyll a fluorescence by 50% and cell radius. We demonstrate a high degree of accuracy overall (92%) in categorizing cells belonging to widely recognized key functional groups; however, this is reduced when we consider the broader diversity of “nano‐phytoflagellates'.” Notably, we observe that some groups, for example, calcifying Isochrysidales, have much greater resilience to electrochemically driven oxidative conditions relative to others of a similar size, making them more easily categorized by the technique. The findings of this study present a promising step forward in advancing our toolkit for monitoring phytoplankton communities. We highlight that, for improved categorization accuracy, future iterations of the method can be enhanced by measuring additional predictor variables with minimal adjustments to the set‐up. In doing so, we foresee this technique being highly applicable, and potentially invaluable, for in situ classification and enumeration of the nanophytoplankton size fraction.

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Section: Current Applicability Of the Methods And Recommendationsmentioning

confidence: 66%

A novel fluoro‐electrochemical technique for classifying diverse marine nanophytoplankton

Barton,

Yang,

Chen

et al. 2023

Limnology & Ocean Methods

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“…With the special characteristics of small discharge gap (l g ) and high dielectric constant (ε d ), a high electric field intensity (10 7 ~ 10 8 V/m) producing strong ionization under atmospheric pressure could be obtained according to Eq. ( 1) 20,21 .…”

Section: Methodsmentioning

confidence: 99%

Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)

Asilevi

Boakye

Oduro–Kwarteng

et al. 2021

Sci Rep

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Non-thermal plasma (NTP) is a promising technology for the improvement of indoor air quality (IAQ) by removing volatile organic compounds (VOCs) through advanced oxidation process (AOP). In this paper, authors developed a laboratory scale dielectric barrier discharge (DBD) reactor which generates atmospheric NTP to study the removal of low-concentration formaldehyde (HCHO), a typical indoor air VOC in the built environment associated with cancer and leukemia, under different processing conditions. Strong ionization NTP was generated between the DBD electrodes by a pulse power zero-voltage switching flyback transformer (ZVS-FBT), which caused ionization of air molecules leading to active species formation to convert HCHO into carbon dioxide (CO2) and water vapor (H2O). The impact of key electrical and physical processing parameters i.e. discharge power (P), initial concentration (Cin), flow rate (F), and relative humidity (RH) which affect the formaldehyde removal efficiency (ɳ) were studied to determine optimum conditions. Results show that, the correlation coefficient (R2) of removal efficiency dependence on the processing parameters follow the order R2 (F) = 0.99 > R2 (RH) = 0.96, > R2 (Cin) = 0.94 > R2 (P) = 0.93. The removal efficiency reached 99% under the optimum conditions of P = 0.6 W, Cin = 0.1 ppm, F = 0.2 m3/h, and RH = 65% with no secondary pollution. The study provided a theoretical and experimental basis for the application of DBD plasma for air purification in the built environment.

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“…But these technologies have the disadvantages of long treatment time, easily causing cabin corrosion and high-energy consumption [83]. To meet the stricter ballast water emission standards [84], a whole new system based on the novel plasma gas injection has been used [8], [15], [16], [85]- [87].…”

Section: E Ballast Water Treatmentmentioning

confidence: 99%

“…•OH radical solution produced by •OH equipment mix with the filtered ballast water, and •OH radicals can inactive the invasive marine species during the ballast water transportation at only a few seconds [15], [16]. After that, to ensure that no organisms regenerate, the treated water must be stored for five days before being discharged [87]. During the treatment, TROs are defined as all kinds of oxidants which can kill harmful marine organisms and pathogens [8].…”

Section: E Ballast Water Treatmentmentioning

confidence: 99%

The Applications of Plasma Gas Injection for Pollutants Treatment

Qiu

Yang²,

2022

IEEE Trans. Plasma Sci.

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Plasma gas injection as one of the non-thermal plasma (NTP) technologies has a free-standing gas-phase plasma reactor outside the polluted target and can efficiently degrade contaminants by injecting plasma gas containing a large number of reactive species. This approach has been utilized in various fields of pollutants treatment, because of its structural advantage of indirect contact between pollutants and electrodes and its ability to produce strong oxidizing species. This article first expounds on the principle of the plasma gas injection and then progresses to a discussion of its application for pollutants degradation, mainly focusing on the treatment effect and degradation mechanisms. It is believed that plasma gas injection is considered to be a very practical, clean, efficient, and environmentally friendly method for pollution control.

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·OH Treatment for Killing of Harmful Organisms in Ship’s Ballast Water with Medium Salinity Based on Strong Ionization Discharge

Cited by 24 publications

References 15 publications

A novel fluoro‐electrochemical technique for classifying diverse marine nanophytoplankton

A novel fluoro‐electrochemical technique for classifying diverse marine nanophytoplankton

Indoor air quality improvement and purification by atmospheric pressure Non-Thermal Plasma (NTP)

The Applications of Plasma Gas Injection for Pollutants Treatment

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