Experimental parameterization of microplastic fragmentation and degradation to develop a mechanistic model of micro- and nanoplastic fragmentation in the environment
Zenodo (CERN European Organization for Nuclear Research)2022
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Charlotte Catrouillet,
Katherine Santizo,
S. Harrison,
Patrizia Pfohl,
Patrizia Pfohl,
Patrizia Pfohl,
Patrizia Pfohl,
Patrizia Pfohl,
Wendel Wohlleben,
Patrizia Pfohl,
Patrizia Pfohl,
Patrizia Pfohl,
Wendel Wohlleben,
Patrizia Pfohl,
Wendel Wohlleben,
Patrizia Pfohl,
S. Harrison,
Patrizia Pfohl,
Antonia Praetorius,
Wendel Wohlleben,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Gbotemi A. Adediran
Antonia Praetorius,
Gbotemi A. Adediran
Gbotemi A. Adediran
Katherine Santizo,
Katherine Santizo,
Patrizia Pfohl,
Charlotte Catrouillet,
Antonia Praetorius,
Mark R. Wiesner,
Patrizia Pfohl,
Claus Svendsen,
Wendel Wohlleben,
Patrizia Pfohl,
Patrizia Pfohl,
S. Harrison,
Claus Svendsen,
Katherine Santizo,
Katherine Santizo,
Mark R. Wiesner,
Mark R. Wiesner,
Charlotte Catrouillet,
Charlotte Catrouillet,
Wendel Wohlleben,
Katherine Santizo,
Katherine Santizo,
Katherine Santizo,
Katherine Santizo,
Katherine Santizo,
Wendel Wohlleben,
Wendel Wohlleben,
Wendel Wohlleben,
Mark R. Wiesner,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Wendel Wohlleben,
Antonia Praetorius,
Claus Svendsen,
Joana Sipe,
Antonia Praetorius,
Wendel Wohlleben,
Claus Svendsen,
Wendel Wohlleben,
Joana Sipe,
Claus Svendsen,
Wendel Wohlleben,
Patrizia Pfohl,
Claus Svendsen,
Wendel Wohlleben,
Patrizia Pfohl,
Antonia Praetorius,
Antonia Praetorius,
Charlotte Catrouillet,
Antonia Praetorius,
Charlotte Catrouillet,
S. Harrison,
Patrizia Pfohl,
Katherine Santizo,
Patrizia Pfohl,
Mark R. Wiesner,
Wendel Wohlleben,
Mark R. Wiesner,
Mark R. Wiesner,
Katherine Santizo,
Mark R. Wiesner,
Antonia Praetorius,
S. Harrison,
Claus Svendsen,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Joana Sipe,
Antonia Praetorius,
Mark R. Wiesner,
Antonia Praetorius,
Joana Sipe,
Gbotemi A. Adediran
Wendel Wohlleben,
Claus Svendsen,
Charlotte Catrouillet,
Claus Svendsen,
S. Harrison,
S. Harrison,
Claus Svendsen,
Mark R. Wiesner,
Richard Cross,
Brandon Lopez,
S. Harrison,
Claus Svendsen,
Claus Svendsen,
S. Harrison,
Patrizia Pfohl,
Claus Svendsen,
Wendel Wohlleben,
Antonia Praetorius,
Mark R. Wiesner,
Mark R. Wiesner,
Joana Sipe,
Brandon Lopez,
Mark R. Wiesner,
Mark R. Wiesner,
Joana Sipe,
Wendel Wohlleben,
Wendel Wohlleben,
Patrizia Pfohl,
Mark R. Wiesner,
Mark R. Wiesner,
Antonia Praetorius,
Mark R. Wiesner,
Mark R. Wiesner,
Claus Svendsen,
Claus Svendsen,
Patrizia Pfohl,
Wendel Wohlleben,
Wendel Wohlleben,
Charlotte Catrouillet,
S. Harrison,
Claus Svendsen,
Mark R. Wiesner,
Wendel Wohlleben,
Mark R. Wiesner,
Wendel Wohlleben,
Charlotte Catrouillet,
Antonia Praetorius,
S. Harrison,
Wendel Wohlleben,
Gbotemi A. Adediran
Gbotemi A. Adediran
Charlotte Catrouillet,
Charlotte Catrouillet,
Charlotte Catrouillet,
Charlotte Catrouillet,
Patrizia Pfohl,
Wendel Wohlleben,
Wendel Wohlleben,
Brandon Lopez,
Charlotte Catrouillet,
Wendel Wohlleben,
Wendel Wohlleben,
Wendel Wohlleben,
Claus Svendsen,
Wendel Wohlleben,
Brandon Lopez,
Wendel Wohlleben,
Wendel Wohlleben,
Charlotte Catrouillet,
Charlotte Catrouillet,
Charlotte Catrouillet,
Charlotte Catrouillet,
Wendel Wohlleben,
Wendel Wohlleben,
Charlotte Catrouillet,
Joana Sipe,
Claus Svendsen,
Wendel Wohlleben,
Claus Svendsen,
Claus Svendsen,
Wendel Wohlleben,
Claus Svendsen,
Wendel Wohlleben,
Antonia Praetorius,
Antonia Praetorius,
Antonia Praetorius,
Claus Svendsen,
Wendel Wohlleben,
Wendel Wohlleben,
Wendel Wohlleben,
Gbotemi A. Adediran
Summary
Researchers subjected seven plastic types (LDPE, PP, HIPS, PU, PET, PLA, and PA) to controlled UV irradiation and hydrolysis under varying temperature, humidity, salinity, and pH conditions, using multiple analytical methods including the NanoRelease/ISO22293 protocol, ATR-FTIR, TOC, GPC, and particle counting to quantify fragmentation rates from micro- to nanoscale. Preliminary results showed HIPS and LDPE fragmented most under UV stress, generating the largest counts of particles in the 1-2 µm size class, providing parameterization data for mechanistic models of environmental microplastic fragmentation.
Microplastic abundance in the environment has been concerning thus there is a need to understand their pathways and rates for fragmentation and degradation in the environment. However, studies that provide data on rates in a systematic approach differentiating the rates related to specific degradation stressors is limited, and often confound multiple stressors. In this study we aim to address fragmentation and degradation of microplastics by stressing plastics with varying resiliency under different environmental conditions (LDPE, PP, HIPS, PU, PET, PLA, and PA). Using ISO4892, we subject microplastic powder at homogeneous UV intensity to varying exposure time, temperatures and relative humidity conditions. An adaptation of the OECD Hydrolysis Guideline (OECD Test No. 111) is also used to observe fragmentation and degradation of the microplastic powder over time under different pH, salinity, and temperature. To assess the pathways and quantify the rates, multiple analytics are utilized. The NanoRelease protocol, ISO22293:2020, was adapted to quantify the smallest fragments, 10nm to 1µm, thus allowing to show micro- to nano-plastic fragmentation. Chemical degradation is assessed via ATR-FTIR, TOC, and GPC analysis. In addition, microplastic fragments between 1-100 µm are analyzed with a particle counter. Preliminary results following two UV stresses show that HIPS and LDPE had the largest fragmentation with large particle counts in the size class of 1 and 2 µm while PP was most resilient with little to no fragmentation at these size classes. PP also had small changes in its Carbonyl Index whereas TPU and HIPS had the largest changes over UV exposure time. These information on fragmentation and chemical degradation per exposure allows rates to be developed for each polymer which can be implemented into models to understand and predict microplastic fragmentation in different environmental compartments. This is the ultimate goal of our collaborative project "cefic LRI ECO59, FRAGMENT-MNP". Also see: https://micro2022.sciencesconf.org/427037/document