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
Transcript of Degradation of plastics in term of loss mechanical...
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
Content
• Introduction
• Methodology
• Analysis and discussion
• Conclusions
Introduction-Solid urban waste
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)
Aim
Evaluate the degradation of plastic films in three marine environments
Methodology
Cut in strips 1 x 10 cm
Additive OXO
Additive OXO
ECOVIO® LDPE HDPEOXO-HDPE
OXO-HDPE-W
Tensile testInitial and final test
MethodologyMesh cage
Buoy
Boulders beach
Sand beach
30 days 60 days
Methodology
Buoy
Boulders beach
Sand beach
30 days 60 days
30 samples of each plastic
Methodology
Methodology
Sand beachBoulders
beach
Buoy Methodology
Analysis and discussion
Analysis and discussion
x=57.2±15.4x=63.4±17.2
x=55.5±45.4
Analysis and discussion
x=75.7±3.5 x=95.4±6.3
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
Analysis and discussion
Analysis and discussion
Analysis and discussion
Analysis and discussion
Analysis and discussion
Analysis and discussion
Analysis and discussion
Factors:• Mechanical wear• Radiation solar
Destination:• Bury• Drag by currents
Analysis and discussion
Factors:• Radiation solar• Biofilm
formation• Salinity
Destination:• Drift• Run aground on beaches• Ingestion marine species
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
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.
Thanks for coming!
ContactJuan Carlos Alvarez Zeferino
Universidad Autónoma de Baja CaliforniaE-mail: [email protected]
