Elemental concentrations and bioaccessibilities in beached plastic foam litter, with particular reference to lead in polyurethane

MARINE POLLUTION BULLETIN

卷:112

Article

Turner, Andrew¹  Lau, Kwan S.¹ 

[1] Univ Plymouth, Sch Geog Earth & Environm Sci, Plymouth PL4 8AA, Devon, England

关键词: Plastics;    Polyurethane;    Foams;    Seabirds;    Lead;    Flame retardants;   

DOI  :  10.1016/j.marpolbul.2016.08.005

来源: Elsevier

【 摘 要 】

Seventy samples of foamed plastic collected from a high-energy, sandy beach in SW England have been characterised by FTIR and XRF. Most samples were polyurethane (PU; n = 39) or polystyrene (PS; n = 27) that were associated with variable concentrations of Br-Cl, Fe and Zn, indicative of the presence of halogenated flame retardants, iron oxides and Zn-based additives, respectively. Many samples of rigid PU contained Pb, historically used as a catalyst, at concentrations of up to 16,000 mu g g(-1). A physiological extraction test that simulates the conditions in the gizzard of plastic-ingesting seabirds was applied to selected samples and results revealed that while Br and Zn were not measurably bioaccessible, Pb mobilisation progressed logarithmically over a period of time with maximum accessibilities after 220 h of similar to 10% of total metal. Foamed PU is a source of bioaccessible Pb in the marine environment that has not previously been documented. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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