We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Generation of microplastics from the opening and closing of disposable plastic water bottles
Summary
Researchers found that the physical act of opening and closing disposable plastic water bottle caps releases microplastic particles into the bottle contents, with particle counts increasing with repeated use and mechanical wear.
There has recently been a significant increase in interest regarding the prevalence of microplastics in bottled water. Previous studies have shown that the composition of many of the microplastics in bottled water is consistent with the materials of the bottle and bottle cap. The focus of this study is to quantify microplastic particle generation from the cap and bottle interaction during open and close cycles. Nile Red dye was used for the detection of microplastics >4.7 μm in size. Microplastic contamination levels in the water were found to increase as the bottle cap is opened and closed repeatedly. The rate of generation of particles with bottle opening and closing cycles (553 ± 202 microplastics/L/cycle) is adequate to account for the total particle density in the water. This clearly demonstrates that the abrasion between the bottle cap and bottleneck is the dominant mechanism for the generation of microplastic contamination detected in bottled water. A large spread between the maximum and minimum levels of microplastic contamination for bottles from the same lot, regardless of the number of times the cap is opened and closed, suggests that mechanical tolerances in the manufacturing of bottles and caps might play an important role in microplastic generation.
Sign in to start a discussion.
More Papers Like This
Does mechanical stress cause microplastic release from plastic water bottles?
Researchers tested whether squeezing and repeated opening of PET water bottles releases microplastics into the contained water, finding that while the inner bottle wall was not a significant source under mechanical stress, repeated opening and closing substantially increased particle shedding from the bottleneck-cap interface.
Detection and formation mechanisms of secondary nanoplastic released from drinking water bottles
Researchers measured nanoplastic release from drinking water bottle caps during simulated opening and closing cycles and detected particles ranging from hundreds of nanometers to about one micrometer. The study found that mechanical stress during normal bottle use degrades the polyethylene sealing material, releasing nanoplastics into the water and altering their properties in ways that complicate detection.
A Preliminary Study of Microplastic Abrasion from the Screw Cap System of Reusable Plastic Bottles by Raman Microspectroscopy
A Raman microspectroscopy pilot study found that the screw cap system of reusable plastic water bottles releases microplastic particles during repeated opening and closing, identifying bottle caps as a previously overlooked source of microplastic contamination in drinking water.
The Effect of Different Storage Conditions for Refilled Plastic Drink Bottles on the Concentration of Microplastic Release in Water
Researchers investigated microplastic release from reused plastic water bottles under different storage conditions and timeframes, finding that bottle reuse and prolonged storage increase the concentration of microplastics released into the contained water.
First evidence of microplastics and their characterization in bottled drinking water from a developing country
Scientists in a developing country analyzed 10 brands of bottled drinking water and found microplastics in all samples, with concentrations varying by brand. The most common particles were polyethylene and polypropylene fragments and fibers, likely originating from the plastic bottle caps and packaging. This study adds to evidence that bottled water is a significant source of daily microplastic intake for people worldwide.