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Fragmentation and biodegradation rates of weathered plastics in the marine environment - The new challenges

Syranidou Evdokia, Kalogerakis Ioannis, Karkanorachaki Aikaterini, Gotsis Alexandros, Partsinevelos Panagiotis, Kalogerakis Nikos

Απλή Εγγραφή

URIhttp://purl.tuc.gr/dl/dias/2D9187A9-9500-4AFD-B5C7-AAE3B178C16E-
Αναγνωριστικόhttps://www.researchgate.net/publication/322538466_Fragmentation_and_biodegradation_rates_of_weathered_plastics_in_the_marine_environment_-_The_new_challenges-
Γλώσσαen-
Μέγεθος17 pagesen
ΤίτλοςFragmentation and biodegradation rates of weathered plastics in the marine environment - The new challengesen
ΔημιουργόςSyranidou Evdokiaen
ΔημιουργόςΣυρανιδου Ευδοκιαel
ΔημιουργόςKalogerakis Ioannisen
ΔημιουργόςΚαλογερακης Ιωαννηςel
ΔημιουργόςKarkanorachaki Aikaterinien
ΔημιουργόςΚαρκανοραχακη Αικατερινηel
ΔημιουργόςGotsis Alexandrosen
ΔημιουργόςΓκοτσης Αλεξανδροςel
ΔημιουργόςPartsinevelos Panagiotisen
ΔημιουργόςΠαρτσινεβελος Παναγιωτηςel
ΔημιουργόςKalogerakis Nikosen
ΔημιουργόςΚαλογερακης Νικοςel
ΕκδότηςEnvironment Canadaen
ΠερίληψηPlastic debris represents a significant problem among the various problems facing the marine environment. In this work we focus on the determination of fragmentation rates, which represent the rate of microplastics generation in the marine environment (plastics weathered on beach sand as well as plastics weathered while floating in seawater) and we shall also present biodegradation data for weathered plastic films. The HOBO Pendant Temperature & Light Data Logger was used to measure temperature in the range -20 to 70 oC and light radiation (illuminance) in the range 0 to 320,000 lux. Integration over time of the latter gives the cumulative luminance exposure of the monitored area. A novel technique to determine experimentally the onset of fragmentation was employed which was linked to the degree of weathering by exposure to natural sunlight. On the other hand, the indigenous pelagic microbiome was incubated with polyethelene (PE) weathered films and showed promising results. In particular, the acclimated consortia reduced more efficiently the weight of PE films in comparison to non-Acclimated bacteria. The SEM images revealed a dense and compact biofilm layer while the rheological results suggest that the polymer had wider molecular mass distribution and a marginally smaller average molar mass after microbial treatment. Concerning the microbial communities attached on the plastic pieces as biofilm, a shift in the PE-Associated microbial assemblages was observed towards efficient degrading microbial network. Taking into account the above results, we can suggest that the tailored indigenous marine community represents an efficient consortium for degrading weathered PE plastics prior to their fragmentation to microplastics.en
ΤύποςΠλήρης Δημοσίευση σε Συνέδριοel
ΤύποςConference Full Paperen
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2018-05-31-
Ημερομηνία Δημοσίευσης2017-
Θεματική ΚατηγορίαMicroplastics en
Βιβλιογραφική ΑναφοράE. Syranidou, G.C. Kalogerakis, K. Karkanorachaki, A.D. Gotsis, P. Partsinevelos and N. Kalogerakis, "Fragmentation and biodegradation rates of weathered plastics in the marine environment - The new challenges," in 40th Arctic and Marine Oilspill Program - Technical Seminar on Environmental Contamination and Response, 2017, pp. 364-380.en

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