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Wen D, Yu Y, Anderin Chuang CY, Jiang Y, Song H. Advancing sustainable seawater disinfection: Enhanced inactivation and mechanism of pulsed UV-LEDs irradiation on Tetraselmis sp. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 345:123425. [PMID: 38266700 DOI: 10.1016/j.envpol.2024.123425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 11/17/2023] [Accepted: 01/21/2024] [Indexed: 01/26/2024]
Abstract
Ultraviolet light-emitting diodes (UV-LEDs), as a novel ultraviolet light source with flexible pulse mode, has gained significant attention for applications in water disinfection and food sterilization. This study investigated the comparative inactivation efficiency of Tetraselmis sp. with continuous and pulsed UV-LEDs irradiation, exploring different wavelengths, duty rates and pulse frequencies. The results reveal a significant enhancement in inactivation efficiency (p < 0.05) under pulsed conditions even at the same UV dose, with inactivation efficiency increasing as duty rate or pulse frequency decreases. The optimal conditions for achieving peak inactivation efficacy are identified as a duty rate of 50% and a pulse frequency of 5 Hz. Within this parameter space, pulsed irradiation leads to a remarkable 1.7-fold increase in inactivation efficiency at UV265 nm and a 1.5-fold increase at UV285 nm compared to continuous irradiation, respectively. Additionally, the disruptive impacts on photosynthetic performance are more pronounced with pulsed irradiation, particularly at the 5 Hz pulse frequency. In shed of these findings, the application of pulsed UV-LEDs irradiation emerges as a promising alternative to the conventional continuous UV disinfection methods in the area of seawater disinfection, offering higher disinfection efficacy and energy consumption.
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Affiliation(s)
- Diya Wen
- State Key Laboratory of NBC Protection for Civilia, Beijing, China; International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | - Yifeng Yu
- International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | | | - Yuelu Jiang
- International Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
| | - Hua Song
- State Key Laboratory of NBC Protection for Civilia, Beijing, China
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Chen Y, Xue J, Feng W, Du J, Wu H. Bloom forming species transported by ballast water under the management of D-1 and D-2 standards-Implications for current ballast water regulations. MARINE POLLUTION BULLETIN 2023; 194:115391. [PMID: 37586266 DOI: 10.1016/j.marpolbul.2023.115391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/02/2023] [Accepted: 08/04/2023] [Indexed: 08/18/2023]
Abstract
Ballast water (BW) is a well-known transporter for introducing non-indigenous aquatic organisms. To reduce such risks associated with BW discharge, the International Maritime Organization (IMO) adopted the International Convention for the Control and Management of Ships' Ballast Water and Sediments (BWM Convention). We examined the abundance and diversity of bloom forming species in BW under the management of Regulation D-1 Ballast Water Exchange Standard and D-2 Ballast Water Performance Standard. The abundance and richness of bloom forming species were also examined in relation to ballast water age. Our findings indicate the abundance and diversity of bloom forming species were significantly lower in BW under the management of D-2 standard than that under D-1 standard. The abundance and richness represent no statistically significant correlation with BW age (p = 0.76 and p = 0.43, respectively). Some resistant species persist in ballast water. Thereby, we further provide some advice to overcome the existing challenges for the implementation of the Regulation D-2.
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Affiliation(s)
- Yating Chen
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on the Ecological Security of Ports and Shipping, Shanghai Ocean University, Shanghai 201306, China.
| | - Junzeng Xue
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on the Ecological Security of Ports and Shipping, Shanghai Ocean University, Shanghai 201306, China.
| | - Wei Feng
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on the Ecological Security of Ports and Shipping, Shanghai Ocean University, Shanghai 201306, China
| | - Jiansen Du
- Qingdao International Travel Healthcare Center, Qingdao Customs District P. R. China, Qingdao, China
| | - Huixian Wu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Centre for Research on the Ecological Security of Ports and Shipping, Shanghai Ocean University, Shanghai 201306, China.
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3
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Wen D, Jiang Y, Chen D. Evaluating disinfection performance of ultraviolet light-emitting diodes against the microalga Tetraselmis sp.: Assay methods, inactivation efficiencies, and action spectrum. CHEMOSPHERE 2022; 308:136113. [PMID: 36007732 DOI: 10.1016/j.chemosphere.2022.136113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 07/05/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Ultraviolet light-emitting diodes (UV-LEDs) are among the most compact devices and safest technologies in water disinfection systems. However, the validation of different assay methods to evaluate the disinfection performance of different wavelengths (265, 280, 285, and 300 nm) of UV-LEDs toward marine microalgae remains poorly characterized. In this study, several detection assays, namely the culture-based most probable number (MPN) assay, membrane integrity-based vital stain (VS) assay, chlorophyll fluorescence assay, and photochemical efficiency assay, were compared to assess the viability of the marine microalga Tetraselmis sp., with results indicating the MPN assay to be the most sensitive. In addition, this study compared the inactivation kinetics, inactivation efficiency, and energy efficiency of Tetraselmis sp. under different UV wavelengths, as assessed by the VS and MPN assays. The fluence-response curves of Tetraselmis sp. varied with assay and wavelength, with Geeraerd's model fitting all fluence-response microalgal inactivation curves. The results showed a non-significant difference in inactivation efficiency among different wavelengths of UV-LEDs (except for 300 nm) when using the VS assay. On the contrary, significant differences among all wavelengths were observed with respect to inactivation efficiency when using the MPN assay. The wavelength of 265 nm exhibited maximum inactivation efficiency, whereas 285 nm achieved optimal energy efficiency. The UV action spectrum of Tetraselmis sp. exhibited the peak at 265 nm, a finding which matched well with the absorbance spectrum of DNA. The observations from this study provide a theoretical basis and technical support for the application of the emerging UV-LED light sources in the algicidal treatment of marine water.
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Affiliation(s)
- Diya Wen
- School of Environment, Tsinghua University, Beijing, 100084, China; Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Yuelu Jiang
- School of Environment, Tsinghua University, Beijing, 100084, China; Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
| | - Daoyi Chen
- School of Environment, Tsinghua University, Beijing, 100084, China; Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.
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Rivas-Zaballos I, Romero-Martínez L, Ibáñez-López ME, García-Morales JL, Acevedo-Merino A, Nebot E. Semicontinuous and batch ozonation combined with peroxymonosulfate for inactivation of microalgae in ballast water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157559. [PMID: 35878852 DOI: 10.1016/j.scitotenv.2022.157559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/18/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
The Ballast Water Management Convention (BWMC) establishes limits regarding the permissible number of viable organisms in discharged ballast water. Ozone as a ballast water treatment is interesting because it can be generated in-situ and has strong oxidant power. Additionally, some oxidants can be formed in reaction with seawater, especially brominated compounds, that assist in inactivating microorganisms. The objective of this study is to assess the efficacy of semicontinuous and batch ozonation as well as their combination with peroxymonosulfate salt (PMS) as methods to be used to ensure compliance with regulation D2 of the BWMC using Tetraselmis suecica as a standard microorganism. Growth modeling method was employed to determine the inactivation achieved by the treatments. The results show that ozone is an effective treatment for accomplishing the D2 of the BWMC. Batch ozonation is more efficient than semicontinuous ozonation probably because of the brominated compounds formed during the ozone saturation of the water. The oxidants that are developed during the ozonation of seawater prolong the residual effect of the treatment throughout the days of storage with practically no presence of them in the ballast tanks at 72 h. The addition of the PMS increases the inactivation in the semicontinuous ozonation, but a threshold concentration of ozone is needed to observe the synergistic effect of both oxidants. No increase is associated with the combination of O3 and PMS in the case of batch ozonation.
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Affiliation(s)
- Ignacio Rivas-Zaballos
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain.
| | - Leonardo Romero-Martínez
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - M Eugenia Ibáñez-López
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, IVAGRO-Wine and Agrifood Research Institute, University of Cadiz, Spain
| | - José L García-Morales
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, IVAGRO-Wine and Agrifood Research Institute, University of Cadiz, Spain
| | - Asunción Acevedo-Merino
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - Enrique Nebot
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
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Casas-Monroy O, Kydd J, Rozon RM, Bailey SA. Assessing the performance of four indicative analysis devices for ballast water compliance monitoring, considering organisms in the size range ≥10 to <50 μm. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115300. [PMID: 35623126 DOI: 10.1016/j.jenvman.2022.115300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 04/23/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
To minimize the global transfer of harmful aquatic organisms and pathogens, the International Maritime Organization (IMO) has introduced the standard in Regulation D-2 to limit the number of viable organisms in ballast water discharged by ships. To meet the standard, many ships are installing ballast water management systems. Concurrently, regulators are looking for indicative analysis devices able to assess compliance with Regulation D-2, producing rapid, accurate and reliable results while being easy to operate. The purpose of this research is to compare four indicative analysis devices against detailed microscopy for measuring the size class of organisms ≥10 to <50 μm in minimum dimension (e.g., phytoplankton, including autotrophs, heterotrophs or mixotrophs), using field and laboratory tests. Comparisons were conducted on (treated) ballast water discharge samples collected across Canada during three consecutive years (2017-2019). During seven tests in 2019, paired ballast water uptake samples were also obtained, facilitating measurements before and after treatment was applied. Indicative analysis devices also were challenged with natural environmental samples containing different organism abundance levels, ranging from low (nominally <10 cells mL-1) to high (nominally >150 cells mL-1) during laboratory tests. While the indicative analysis devices examined during this research produced numeric estimates having weak correlations with the standard reference method, categorical outcomes (above/below the D-2 standard) had high agreement (89% or better) when assessing ballast water samples, but lower agreement (67% or poorer) during laboratory tests. There was a relatively high rate of false negative results measured by all devices during laboratory tests. Results provided by indicative analysis devices had higher uncertainty when organism abundances in ballast samples are below and close to the D-2 standards.
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Affiliation(s)
- Oscar Casas-Monroy
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON, L7S 1A1, Canada.
| | - Jocelyn Kydd
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON, L7S 1A1, Canada.
| | - Robin M Rozon
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON, L7S 1A1, Canada.
| | - Sarah A Bailey
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON, L7S 1A1, Canada.
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Sayinli B, Dong Y, Park Y, Bhatnagar A, Sillanpää M. Recent progress and challenges facing ballast water treatment - A review. CHEMOSPHERE 2022; 291:132776. [PMID: 34742764 DOI: 10.1016/j.chemosphere.2021.132776] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/30/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
The transoceanic movement of non-indigenous microorganisms and organic and inorganic contaminants through the transfer of ballast water of ocean-going vessels can be considered highly likely. The introduction of contaminants and non-indigenous microorganisms can cause changes in indigenous microorganisms, marine species, and biota, which can create problems for the ecology, economy, environment, and human health. This paper compiles and presents ballast water treatment system concepts, principles of inactivation mechanisms used, and the advantages and challenges of the treatment technologies. In addition, the paper aims to draw attention to the relationship between various organisms and the individual mechanism to be inactivated, including the effect of external factors (e.g., pH, salinity, turbidity) on inactivation efficiency. This review can assist in the choice of a suitable ballast water treatment system, taking into account the water conditions (e.g., pH, temperature, salinity) and indigenous species of the maritime areas where the ships intend to operate. This review also provides information describing the responses of the various organisms to different treatment techniques.
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Affiliation(s)
- Burcu Sayinli
- Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology LUT, Mikkeli, Finland; Department of Chemistry, University of Jyväskylä, Box 111, FI-40014, Jyväskylä, Finland
| | - Yujiao Dong
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University, Finland
| | - Yuri Park
- Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology LUT, Mikkeli, Finland; Institute of Environmental Technology, Department of Environmental Engineering, Seoul National University of Science and Technology, Seoul, 01811, South Korea.
| | - Amit Bhatnagar
- Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology LUT, Mikkeli, Finland
| | - Mika Sillanpää
- Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
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7
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Study on the antibacterial properties of BiOIO3/graphene oxide (GO) modified fluorocarbon resin coating (PEVE) under UV light. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-02065-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Rivas-Zaballos I, Romero-Martínez L, Moreno-Garrido I, Acevedo-Merino A, Nebot E. Evaluation of three photosynthetic species smaller than ten microns as possible standard test organisms of ultraviolet-based ballast water treatment. MARINE POLLUTION BULLETIN 2021; 170:112643. [PMID: 34175694 DOI: 10.1016/j.marpolbul.2021.112643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
The Ballast Water Management Convention (BWMC) establishes limits for viable organisms in discharged ballast water. However, organisms smaller than 10 μm are not considered in this regulation although they represent, in some regions, the majority of the phytoplankton organisms in marine water. The objective in this study is to assess three photosynthetic species smaller than 10 μm as potential standard test organism (STO) in experimentation focused on the inactivating efficacy of ultraviolet treatments (UV). A growth modelling method was employed to determine the reduction of the viable cell concentration under either light or dark post-treatment conditions to evaluate the importance of the photoreactivation. In spite of its moderate growth rate, the high UV resistance in combination with the abundance and worldwide distribution of Synechococcus sp. and the environmental importance of this species constitute important reasons for considering Synechococcus sp. as a valuable STO for ballast water treatment.
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Affiliation(s)
- Ignacio Rivas-Zaballos
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain..
| | - Leonardo Romero-Martínez
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - Ignacio Moreno-Garrido
- Institute of Marine Sciences of Andalusia (CSIC), Campus Río San Pedro, s/n, 11510 Puerto Real, Cádiz, Spain
| | - Asunción Acevedo-Merino
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
| | - Enrique Nebot
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea, University of Cadiz, Spain
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Romero-Martínez L, Rivas-Zaballos I, Moreno-Andrés J, Moreno-Garrido I, Acevedo-Merino A, Nebot E. Improving the microalgae inactivating efficacy of ultraviolet ballast water treatment in combination with hydrogen peroxide or peroxymonosulfate salt. MARINE POLLUTION BULLETIN 2021; 162:111886. [PMID: 33310544 DOI: 10.1016/j.marpolbul.2020.111886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/23/2020] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
Due to the increasing number of ecosystem invasions with the introduction of exogenous species via ballast water, the International Maritime Organization adopted the Ballast Water Convention (BWMC). The BWMC establishes standards for the concentration of viable organisms in a ballast water discharge. Ultraviolet (UV) irradiation is commonly used for treating ballast water; however, regrowth after UV irradiation and other drawbacks have been reported. In this study, improvement in UV treatment with the addition of hydrogen peroxide or peroxymonosulfate salt was investigated using the microalgae Tetraselmis suecica as the target organism. Results reported that each of these reagents added in a concentration of 10 ppm reduced the concentration of initial cells by more than 96%, increased the UV inactivation rate, and enabled reaching greater level of inactivation with the treatment. These improvements imply a reduction of the UV doses required for a consistent compliance with the BWMC standards.
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Affiliation(s)
- Leonardo Romero-Martínez
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences. INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea. University of Cadiz. Spain.
| | - Ignacio Rivas-Zaballos
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences. INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea. University of Cadiz. Spain
| | - Javier Moreno-Andrés
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences. INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea. University of Cadiz. Spain
| | - Ignacio Moreno-Garrido
- Institute of Marine Sciences of Andalusia (CSIC), Campus Río San Pedro, s/n 11510, Puerto Real, Cádiz, Spain
| | - Asunción Acevedo-Merino
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences. INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea. University of Cadiz. Spain
| | - Enrique Nebot
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences. INMAR - Marine Research Institute, CEIMAR - International Campus of Excellence of the Sea. University of Cadiz. Spain
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