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Updated: May 31, 2026
10:12
Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
Published on: July 1, 2017
Small plastic debris changes water movement and heat transfer through beach sediments
Henry S Carson1, Steven L Colbert, Matthew J Kaylor
1Marine Science Department, University of Hawai'i at Hilo, 200 W. Kawili St., Hilo, HI 96720, United States. hcarson@hawaii.edu
Marine Pollution Bulletin
|June 25, 2011
Summary
Plastic fragments on Kamilo Beach significantly altered sediment properties, increasing permeability and affecting thermal conductivity. These physical changes in beach sand may impact coastal organisms, including sea turtle nesting sites.
Area of Science:
- Environmental Science
- Geology
- Marine Biology
Background:
- Beaches worldwide are increasingly contaminated with plastic debris.
- Plastic fragments can alter the physical characteristics of beach sediments.
Purpose of the Study:
- To investigate the impact of plastic fragments on the physical properties of beach sediments.
- To compare plastic-contaminated sediments with those from a pristine beach.
- To assess the effects of plastic on sediment thermal properties.
Main Methods:
- Collected and analyzed sediment cores from Kamilo Beach, Hawai'i, and a nearby control beach.
- Quantified plastic content, grain size, and permeability of sediments.
- Created artificial sediment cores with varying plastic concentrations to test permeability and thermal properties.
Main Results:
- Kamilo Beach sediments contained up to 30.2% plastic by weight, primarily polyethylene.
- Plastic-contaminated sediments were coarser-grained and significantly more permeable.
- Adding plastic decreased thermal diffusivity and increased heat capacity of sediments.
- Plastic accumulation was concentrated in the top 15 cm of sediment cores.
Conclusions:
- Plastic pollution significantly alters beach sediment physical properties, including permeability and thermal dynamics.
- These alterations can affect the thermal environment of beach ecosystems.
- Impacts may be particularly relevant for temperature-sensitive organisms, such as sea turtles.
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