degradation of plastics in term of loss mechanical...
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Degradation of plastics in term of loss mechanical properties a coastal zone, port of Manzanillo, Colima
Alvarez-Zeferino Juan Carlos
Vázquez-Morillas Alethia
Beltrán-Villavicencio Margarita
Ojeda-Benitez Sara
Sylva-Iñiguez Lidia
San Diego, California, USA • March 12-16, 2018
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Content
• Introduction
• Methodology
• Analysis and discussion
• Conclusions
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Introduction-Solid urban waste
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Introduction-Plastics
Compound Percentage
Terephthalic acid 13.21
Adipic acid 15.29
1-4 butanediol 27.50
Lactic acid 45.00
Images: http://www.packwebasia.com/images/stories/EcoProducts/basf_ecovio_bagwwaste_a.jpg; http://imprexa.com.mx/imagenes/D2W.jpeg
Metallic saltsMn, Fe, Co,
among others
Oxo-degradables
Biodegradables (compostable)
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Aim
Evaluate the degradation of plastic films in three marine environments
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Methodology
Cut in strips 1 x 10 cm
Additive OXO
Additive OXO
ECOVIO® LDPE HDPEOXO-HDPE
OXO-HDPE-W
Tensile testInitial and final test
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MethodologyMesh cage
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Buoy
Boulders beach
Sand beach
30 days 60 days
Methodology
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Buoy
Boulders beach
Sand beach
30 days 60 days
30 samples of each plastic
Methodology
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Methodology
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Sand beachBoulders
beach
Buoy Methodology
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Analysis and discussion
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Analysis and discussion
x=57.2±15.4x=63.4±17.2
x=55.5±45.4
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Analysis and discussion
x=75.7±3.5 x=95.4±6.3
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Introduction-Plastics
Images: http://www.packwebasia.com/images/stories/EcoProducts/basf_ecovio_bagwwaste_a.jpg; http://imprexa.com.mx/imagenes/D2W.jpeg
Oxo-degradables
Photodegradation
Biodegradables Hydrolysis
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Analysis and discussion
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Analysis and discussion
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Analysis and discussion
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Analysis and discussion
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Analysis and discussion
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Analysis and discussion
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Analysis and discussion
Factors:• Mechanical wear• Radiation solar
Destination:• Bury• Drag by currents
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Analysis and discussion
Factors:• Radiation solar• Biofilm
formation• Salinity
Destination:• Drift• Run aground on beaches• Ingestion marine species
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Conclusions
• The majority of plastics presented affectations in their elastic properties, with the exception of LDPE
• Plastics exposed to beach conditions showed greater degradation, attributed to mechanical wear
• Formation of biofilm is one of the principal factors in the degradation of plastics in environment aquatic
• The plastics evaluated are susceptible to fragmentation and therefore become microplastics
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References
Alvarez-Zeferino, J.C., Beltrán-Villavicencio, M. & Vázquez-Morillas, A., 2015.
Degradation of Plastics in Seawater in Laboratory. Open Journal of Polymer
Chemistry, 5(4), pp.55–62. Avaliable at:
http://www.ncbi.nlm.nih.gov/pubmed/1533494%5Cnhttp://www.ncbi.nlm.nih.
gov/pubmed/9799186%5Cnhttp://www.pubmedcentral.nih.gov/articlerender.f
cgi?artid=PMC1533494%5Cnhttp://www.scirp.org/journal/PaperDownload.asp
x?DOI=10.4236/ojpchem.2015.54007.
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Thanks for coming!
ContactJuan Carlos Alvarez Zeferino
Universidad Autónoma de Baja CaliforniaE-mail: [email protected]