Who: Kazi Albab Hussain
When: September 27, 2024, 2:00pm
Where: SEC C107
Zoom:
https://unl.zoom.us/j/96644470218?pwd=duHjMxGJVd9I9LA0E56BbZZaO5q1wc.1
Title: Assessment of Nano and Microplastic Release from Plastic Packaging: Influencing Factors and Implications
Abstract: Nanoplastics (1 nm–1000 nm) and microplastics (1 µm–5
mm) released from plastic packaging into food present human
health risks due to the widespread use of plastics in food storage,
preparation, and handling. This dissertation investigates the
release of these particles from plastic containers and pouches
under various conditions. Microwave heating leads to the highest
release, with up to 4.22 million microplastics and 2.11 billion
nanoplastics per square centimeter in three minutes. Refrigeration
and room temperature storage also contribute to particle release.
In vitro studies demonstrate cytotoxicity to human embryonic
kidney (HEK293T) cells. A systematic review and meta-analysis
confirm that methods detecting smaller particles report higher
concentrations regardless of packaging material, release
conditions, or geographical study location. Elevated temperatures
and extended contact times increase the release of these
particles, while repeated use generally reduces it due to a shift in
the release mechanism from particle detachment to material
degradation. Studies of single-use PET bottles show increased
particle concentration in real-life scenarios, such as car storage at hot or cold temperatures.