Recycled electronic plastic and marine litter.

Area of Science:

• Environmental Science
• Materials Science
• Toxicology

Background:

• Black consumer plastics pose recycling challenges due to sorting limitations.
• Waste electrical and electronic equipment (WEEE) is a significant source of black plastic.
• WEEE-derived plastics can contain hazardous chemicals, leading to environmental contamination.

Purpose of the Study:

• To analyze hazardous chemical content in black plastic litter from southwest England.
• To investigate the link between WEEE and hazardous chemicals in marine plastic debris.
• To assess the bioaccessibility of detected hazardous elements in plastic samples.

Main Methods:

• Categorization of 524 beached plastic litter samples by origin, appearance, and color.
• X-ray fluorescence (XRF) spectrometry to detect elements characteristic of EEE.
• Avian physiologically-based extraction test to determine elemental bioaccessibility.

Main Results:

• Bromine (Br), Cadmium (Cd), Chromium (Cr), and Lead (Pb) were common in black plastics.
• 35 samples potentially exceeded limits set by the Restriction of Hazardous Substances Directive.
• Lead (Pb) in black PVC showed a bioaccessibility of approximately 2.4%.

Conclusions:

• Recycling WEEE into black plastics is a key pathway for introducing hazardous chemicals into the environment.
• This process contributes to wildlife exposure to toxic substances.
• Further research is needed to mitigate the environmental impact of WEEE-derived black plastics.