10 results on '"Angel, Dror L."'
Search Results
2. Between source and sea: The role of wastewater treatment in reducing marine microplastics
- Author
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Freeman, Shirra, Booth, Andy M., Sabbah, Isam, Tiller, Rachel, Dierking, Jan, Klun, Katja, Rotter, Ana, Ben-David, Eric, Javidpour, Jamileh, Angel, Dror L., Freeman, Shirra, Booth, Andy M., Sabbah, Isam, Tiller, Rachel, Dierking, Jan, Klun, Katja, Rotter, Ana, Ben-David, Eric, Javidpour, Jamileh, and Angel, Dror L.
- Abstract
Wastewater treatment plants (WWTPs) are a focal point for the removal of microplastic (MP) particles before they are discharged into aquatic environments. WWTPs are capable of removing substantial quantities of larger MP particles but are inefficient in removing particles with any one dimension of less than 100 mu m, with influents and effluents tending to have similar quantities of these smaller particles. As a single WWTP may release >100 billion MP particles annually, collectively WWTPs are significant contributors to the problem of MP pollution of global surface waters. Currently, there are no policies or regulations requiring the removal of MPs during wastewater treatment, but as concern about MP pollution grows, the potential for wastewater technologies to capture particles before they reach surface waters has begun to attract attention. There are promising technologies in various stages of development that may improve the removal of MP particles from wastewater. Better incentivization could speed up the research, development and adoption of innovative practices. This paper describes the current state of knowledge regarding MPs, wastewater and relevant policies that could influence the development and deployment of new technologies within WWTPs. We review existing technologies for capturing very small MP particles and examine new developments that may have the potential to overcome the shortcomings of existing methods. The types of collaborations needed to encourage and incentivize innovation within the wastewater sector are also discussed, specifically strong partnerships among scientific and engineering researchers, industry stakeholders, and policy decision makers.
- Published
- 2020
- Full Text
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3. Patterns of invasive ctenophore Mnemiopsis leidyi distribution and variability in different recipient environments of the Eurasian seas: A review
- Author
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Ministry of Education and Science of the Russian Federation, Shiganova, Tamara A., Sommer, Ulrich, Javidpour, Jamileh, Molinero, Juan Carlos, Malej, Alenka, Kazmin, A.S., Isinibilir, M., Christou, E., Siokou-Frangou, Ioanna, Marambio, Macarena, Fuentes, Veronica, Mirsoyan, Z.A., Gülsahin, N., Lombard, Fabien, Lilley, Martin K. S., Angel, Dror L., Galil, Bella S., Bonnet, Delphine, Delpy. F., Ministry of Education and Science of the Russian Federation, Shiganova, Tamara A., Sommer, Ulrich, Javidpour, Jamileh, Molinero, Juan Carlos, Malej, Alenka, Kazmin, A.S., Isinibilir, M., Christou, E., Siokou-Frangou, Ioanna, Marambio, Macarena, Fuentes, Veronica, Mirsoyan, Z.A., Gülsahin, N., Lombard, Fabien, Lilley, Martin K. S., Angel, Dror L., Galil, Bella S., Bonnet, Delphine, and Delpy. F.
- Abstract
Harmful invader ctenophore Mnemiopsis leidyi's expansions in the Eurasian Seas, its spatio-temporal population dynamics depending on environmental conditions in recipient habitats have been synthesized. M. leidyi found suitable temperature, salinity and productivity conditions in the temperate and subtropical environments of the semi-enclosed seas, in the coastal areas of open basins and in closed water bodies, where it created autonomous populations. M. leidyi changes its phenology depending on seasonal temperature regime in different environments. We assessed ranges of sea surface temperature, sea surface salinity and sea surface chlorophyll values, sufficient for M. leidyi general occurrence and reproduction based on comprehensive long-term datasets, contributed by co-authors. This assessment revealed that there are at least two eco-types (Southern and Northern) in the recipient seas of Eurasia with features specific for their donor areas. The range of thresholds for M. leidyi establishment, occurrence and life cycle in both eco-types depends on variability of environmental parameters in their native habitats
- Published
- 2019
4. Monitoring jellyfish outbreaks along Israel's Mediterranean coast using digital footprints.
- Author
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Levy T, Ghermandi A, Lehahn Y, Edelist D, and Angel DL
- Subjects
- Animals, Humans, Israel, Retrospective Studies, Disease Outbreaks, Cnidaria, Scyphozoa
- Abstract
With mounting global concerns about jellyfish outbreaks, monitoring their occurrence remains challenging. Tapping into the wealth of digital data that internet users share online, which includes reports of jellyfish sightings, may provide an alternative or complement to more conventional expert-based or citizen science monitoring. Here, we explore digital footprints as a data source to monitor jellyfish outbreaks along the Israeli Mediterranean coast. We compiled jellyfish sighting data for the period 2011-2022 from multiple platforms, including leading social media platforms, searches in the Google search engine, and Wikipedia page views. Employing time series analysis, cross-correlation, and various evaluation metrics for presence/absence data, we compared weekly data from three sources: digital footprints, citizen science, and traditional expert-based field monitoring. Consistent seasonal patterns emerge across datasets, with notable correlations, particularly in jellyfish abundance. The cross-correlation between digital footprint and citizen science data exceeds >0.7, with Twitter and Instagram showing the highest correlation. Citizen science data often precedes digital footprints by up to one week. Correlation with traditional, expert-based field monitoring is limited as a result of limited data availability. Digital footprints demonstrate substantial agreement with the other data sources regarding jellyfish presence/absence and major outbreaks, especially for data from Wikipedia, Twitter, and Instagram. Overall, we highlight digital footprint data as a reliable, cost-effective tool for passive monitoring of jellyfish outbreaks, which can aid characterization in data-scarce coastal regions, including retrospective assessment. Transferring and scaling up the proposed approach should consider data accessibility as well as platform relative popularity and usage in the regions under investigation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
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5. Mechanism of nanoplastics capture by jellyfish mucin and its potential as a sustainable water treatment technology.
- Author
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Ben-David EA, Habibi M, Haddad E, Sammar M, Angel DL, Dror H, Lahovitski H, Booth AM, and Sabbah I
- Subjects
- Animals, Humans, Mucins metabolism, Microplastics, Adsorption, Scyphozoa, Water Purification methods, Nanoparticles chemistry
- Abstract
The accumulation of nanoplastics (NPs) in the environment has raised concerns about their impact on human health and the biosphere. The main aim of this study is to understand the mechanism that governs the capture of NPs by jellyfish mucus extracted from the jellyfish Aurelia sp. (A.a.) and compare the capture/removal efficiency to that of conventional coagulants and mucus from other organisms. The efficacy of A.a mucus to capture polystyrene and acrylic NPs (∼100 nm) from spiked wastewater treatment plant (WWTP) effluent was evaluated. The mucus effect on capture kinetics and destabilization of NPs of different polymer compositions, sizes and concentrations was quantified by means of fluorescent NPs, dynamic light scattering and zeta potential measurements and visualized by scanning electron microscopy. A dosing of A.a. mucus equivalent to protein concentrations of ∼2-4 mg L
-1 led to a rapid change in zeta potential from a baseline of -30 mV to values close to 0 mV, indicating a marked change from a stable to a non-stable dispersion leading to a rapid (<10 min) and significant removal of NPs (60 %-90 %) from a stable suspension. The A.a. mucus outperformed all other mucus types (0-37 %) and coagulants (0 %-32 % for ferric chloride; 23-40 % for poly aluminum chlorohydrate), highlighting the potential for jellyfish mucus to be used as bio-flocculant. The results indicate a mucus-particle interaction consisting of adsorption-bridging and "mesh" filtration. Further insight is provided by carbohydrate composition and protein disruption analysis. Total protein disruption resulted in a complete loss of the A.a. mucus capacity to capture NPs, while the breaking of disulfide bonds and protein unfolding resulted in improved capture capacity. The study demonstrates that natural jellyfish mucin can capture and remove NPs in water and wastewater treatment systems more efficiently than conventional coagulants, highlighting the potential for development of a new type of bio-flocculant., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
- Full Text
- View/download PDF
6. Monetizing environmental impact of integrated aquaponic farming compared to separate systems.
- Author
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Greenfeld A, Becker N, Bornman JF, Spatari S, and Angel DL
- Subjects
- Animals, Environment, Hydroponics, Lactuca, Agriculture, Aquaculture
- Abstract
Aquaponics is an emerging industry promoted as a sustainable agricultural practice. Economic sustainability of aquaponics is challenging, partly because some of the benefits are external to the grower, necessitating public intervention to support the industry. We used life cycle assessment to estimate the environmental impact of a proposed aquaponic system and applied a set of economic valuation methods to assess the costs of identified impact factors. We found that the system, planned to produce 60,000 ornamental fish and 108,000 lettuce heads per year would impact the environment with a cost of 10,700 EUR annually, about half the environmental cost of separate production of the same produce. Most of the external cost can be attributed to the industrial processes that prepare products used for aquaponic production. Although this method provides only a rough estimate of actual system impact, it can potentially be used to assess the cost-effectiveness of aquaponics from an environmental perspective., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
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7. Microplastic distributions in a domestic wastewater treatment plant: Removal efficiency, seasonal variation and influence of sampling technique.
- Author
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Ben-David EA, Habibi M, Haddad E, Hasanin M, Angel DL, Booth AM, and Sabbah I
- Abstract
Wastewater treatment plants (WWTPs) serve as an important route of microplastics (MPs) to the environment. Therefore, more effective MPs sampling and detection methodologies, as well as a better understanding of their influence on MPs occurrence and distributions in WWTP effluents, are needed for better removal and control. In this work, the efficiency of a municipal WWTP to remove MPs was assessed by collecting samples from raw to tertiary effluent during a 12-month sampling campaign (season-based) using different sampling methods (containers, 24-h composite and large grab samples). MPs retrieved from different treatment units within the WWTP were identified and quantified using plastic/non-plastic staining followed by optical microscopy, SEM and μ-Raman microscopy. Overall, the mean removal efficiency of MPs in the WWTP was 97%, with most MPs removed by the secondary stage and a mean effluent concentration of 1.97 MPs L
-1 after sand filtration. The relative abundance of particles was lower than fibers in treated effluent compared with the raw wastewater, with MP fibers constituting 74% of the total MPs in raw wastewater and 91% in treated effluent. Taking seasonal variations into account is important as total MPs concentration in the effluent was notably higher in winter compared with the other seasons. Increasing the sampled volume using large samples or 24-h composite samples significantly reduced the variability between replicates. However, MPs concentration post the tertiary stage was significantly lower using morning sampling (9 am) by large grab sampling method (1.2 MPs L-1 ) compared to 24-h composite sampling (3.2 MPs L-1 ) possibly due to intra-daily changes. Using a finer mesh size (0.45 μm) to capture MPs beyond the size range typically studied (≥20 μm) effectively doubled the number of MPs detected in the tertiary effluent and highlights the importance of standardizing sampling procedures., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
8. Uptake and incorporation of PCBs by eastern Mediterranean rabbitfish that consumed microplastics.
- Author
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van der Hal N, Yeruham E, Shukis D, Rilov G, Astrahan P, and Angel DL
- Subjects
- Animals, Humans, Mediterranean Sea, Microplastics, Environmental Monitoring, Fishes, Plastics analysis, Polychlorinated Biphenyls analysis, Water Pollutants, Chemical analysis
- Abstract
Two experiments were executed to assess the feasibility of Polychlorinated Biphenyls (PCBs) transfer to fish tissues via MPs as a vector. PCBs that occur in the marine environment were tested for their adsorption to four different MP types. PCB congeners showed the highest adsorption levels to Polypropylene homo-polymer. The uptake of PCBs through MP ingestion was tested in an outdoor mesocosm using the herbivorous rabbitfish, Siganus rivulatus in the eastern Mediterranean Sea. Polypropylene homo-polymer particles (0.3-5.0 mm) pre saturated with 11 PCB congeners, in two concentrations (500 ng/g and 5000 ng/g), were mixed with dough and offered to the fish. PCBs were identified after two weeks in fish muscle tissues, but not in the liver. These results suggest that ingestion of contaminated MP by rabbitfish might harm them in the long run, and perhaps even those who consume them on a regular basis, e.g. rabbitfish predators and humans., (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Published
- 2020
- Full Text
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9. Phytoplankton response to N-rich well amelioration brines: A mesocosm study from the southeastern Mediterranean Sea.
- Author
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Raveh O, Angel DL, Astrahan P, Belkin N, Bar-Zeev E, and Rahav E
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- Biodiversity, Biomass, Chlorophyll A metabolism, Cyanobacteria physiology, Ecosystem, Eukaryota physiology, Eutrophication, Mediterranean Sea, Phytoplankton genetics, RNA, Ribosomal, 18S, Seasons, Nitrogen metabolism, Phytoplankton physiology, Seawater chemistry
- Abstract
Human-induced eutrophication of coastal water may be a major threat to aquatic life. Here, we investigated the effects of N-rich well amelioration brines (WAB) on coastal phytoplankton population's habitat in the surface oligotrophic waters of the southeastern Mediterranean Sea (SEM). To this end, we added WAB (2 concentrations) to mesocosms (1-m
3 bags) to surface SEM water during summer and winter, where changes in phytoplankton biomass, activity and diversity was monitored daily for 8 days. Our results demonstrate that WAB addition triggered a phytoplankton bloom, resulting in elevated algal biomass (maximal +780%), increased primary production rates (maximal +675%) and a decrease in eukaryotic algal α-diversity (ca. -20%). Among the species that bloomed following WAB amendments, we found the potentially toxic dinoflagellate Karlodinium venificum. This study adds valuable perspective to the effect of nutrients discharged into nutrient limited SEM coastal waters, and in particular of N-derived WAB., (Copyright © 2019 Elsevier Ltd. All rights reserved.)- Published
- 2019
- Full Text
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10. Exceptionally high abundances of microplastics in the oligotrophic Israeli Mediterranean coastal waters.
- Author
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van der Hal N, Ariel A, and Angel DL
- Subjects
- Israel, Mediterranean Sea, Environmental Monitoring, Plastics, Water Pollutants, Chemical
- Abstract
Seasonal sea surface microplastic distribution was recorded at 17 sites along the Israeli Mediterranean coast. Microplastics (0.3-5mm) were found in all samples, with a mean abundance of 7.68±2.38particles/m
3 or 1,518,340particles/km2 . Some areas had higher abundances of microplastics than others, although differences were neither consistent nor statistically significant. In some cases microplastic particles were found floating in large patches. One of these patches contained an extraordinary number of plastic particles; 324particles/m3 or 64,812,600particles/km2 . Microplastic abundances in Israeli coastal waters are disturbingly high; mean values were 1-2 orders of magnitude higher than abundances reported in other parts of the world. Light-colored (white or transparent) fragments were by far more abundant than all other microplastic colors and types. The results of this study underline the need for action to reduce the flux of plastics to the marine environment., (Copyright © 2016 Elsevier Ltd. All rights reserved.)- Published
- 2017
- Full Text
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