Black plastics: Linear and circular economies, hazardous additives and marine pollution.
Level 5 - mechanism / opinion, no new human data
Level 5 by design analogy; narrative review synthesizing policy frameworks and environmental chemical measurements.
PubMed 29778831 · doi:10.1016/j.envint.2018.04.036
What was done
Reviewed the life cycles of single-use black food packaging and black plastic from waste electronic and electrical equipment (WEEE) within international regulatory frameworks and recycling practices. The review synthesized published and unpublished measurements of restricted substances (heavy metals including Cd, Cr, Hg, and Pb; Sb; and Br as a proxy for brominated flame retardants) in food packaging, electronics, general consumer goods, and black plastic litter collected from beaches in southwest England.
What was found
The abstract reports no exact quantitative concentrations or sample sizes. Single-use black packaging follows a linear waste stream because near-infrared sorting systems fail to detect black pigments. Conversely, recycled WEEE plastics enter a quasi-circular economy that introduces brominated flame retardants, antimony, and heavy metals into non-electronic black consumer items, including food-contact items (thermos cups, cutlery), toys, tool handles, spectacle frames, and jewellery. Marine beach litter from southwest England showed chemical signatures matching contaminated consumer products and blended WEEE recyclate.
Why it matters
Demonstrates that poorly segregated electronic waste recycling contaminates everyday consumer products and marine ecosystems with regulated toxic chemicals.
Limits
The abstract provides no numerical concentration values, sample sizes, or exposure limits. The work is a narrative review rather than a systematic review, and detailed methodology for dataset selection is not provided in the record.
Cited by
- supports Black plastic used in food containers is often sourced from recycled electronics containing toxic flame retardants that leach into food.