Comparison of microplastic isolation and extraction procedures from marine sediments

MARINE POLLUTION BULLETIN

卷:159

Article

Cashman, Michaela A.^1,2  Ho, Kay T.¹  Boving, Thomas B.^2,3  Russo, Stephen⁴  Robinson, Sandra¹  Burgess, Robert M.¹ 

[1] US EPA, ORD CEMM Atlantic Coastal Environm Sci Div, 27 Tarzwell Dr, Narragansett, RI 02882 USA

[2] Univ Rhode Isl, Dept Geosci, 9 E Alumni Ave, Kingston, RI 02881 USA

[3] Univ Rhode Isl, Dept Civil Engn, 9 E Alumni Ave, Kingston, RI 02881 USA

[4] US EPA, ORD CEMM Atlantic Coastal Environm Sci Div, ORAU, Narragansett, RI 02882 USA

关键词: Microplastics;    Sediment;    Method comparison;    Plastics;    Extraction;   

DOI  :  10.1016/j.marpolbul.2020.111507

来源: Elsevier

【 摘 要 】

Microplastics (MPs) are small (< 5 mm) plastic particles which pose a threat to marine ecosystems. Identifying MPs is crucial for understanding their fate and effects. Many MP extraction methods exist, but procedural differences prevent meaningful comparisons across datasets. This method comparison examines the efficiency of five methods for extracting MPs (40-710 mu m) from marine sediments. Known quantities of MPs were spiked into sediments. The MPs were extracted and enumerated to demonstrate percent recovery. Findings determined that sediment matrix, MP properties, and extraction method affect the percent recovery of MPs from sediments. Average recoveries of spiked microplastics were between 0 and 87.4% and varied greatly by sediment type, microplastic, and method of extraction. In general, larger particle and lower density MPs were more effectively recovered. Marine sediments low in organic matter and with larger grain size also had higher percent recoveries of MPs. These findings support the need for method optimization and unified procedures.

【 授权许可】

Free