气候变化领域集成服务门户(CCPortal): Degradation of bio-based and biodegradable plastics in a salt marsh habitat: Another potential source of microplastics in coastal waters

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DOI	10.1016/j.marpolbul.2020.111518
	Degradation of bio-based and biodegradable plastics in a salt marsh habitat: Another potential source of microplastics in coastal waters
	Weinstein J.E.; Dekle J.L.; Leads R.R.; Hunter R.A.
发表日期	2020
ISSN	0025326X
卷号	160
英文摘要	Degradation of bio-based (polylactic acid [PLA] cups, Mater-Bi® [MB] bags) and biodegradable plastics (biodegradable extruded polystyrene [bioPS] plates, biodegradable high density polyethylene [bioHDPE] bags) were compared to conventional plastics (recycled polyethylene terephthalate [rPET] cups, HDPE bags, extruded PS plates) in a salt marsh over a 32-week period. Following 4 weeks, biofilm developed on all plastics, resulting in an increased weight and concomitant decrease in UV transmission for most plastics. All plastics produced microplastic particles beginning at 4 weeks, with single-use bags producing the most microplastics over the 32-week period. At 32 weeks, SEM revealed microcracks and delamination for all plastics except PLA and MB, the latter of which degraded through embrittlement. IR spectral analysis indicated degradation for all plastics except PLA. Results suggest that degradation rates of bio-based and biodegradable plastics vary widely, with MB bags and bioPS plates demonstrating the greatest degradation, while PLA cups demonstrated the least degradation. © 2020 Elsevier Ltd
英文关键词	High density polyethylene; Microplastics; Polyethylene terephthalate; Polylactic acid; Polystyrene
语种	英语
scopus关键词	Aliphatic compounds; Degradation; Elastomers; High density polyethylenes; Microcracks; Microplastic; Plastic bottles; Plastic products; Spectrum analysis; Uranium metallography; Vanadium metallography; Wetlands; Biodegradable plastics; Concomitant decrease; Degradation rate; Extruded polystyrenes; Microplastic particles; Poly lactic acid; Potential sources; Recycled polyethylene terephthalates; Biodegradable polymers; microplastic; polyethylene; polyethylene terephthalate; polylactic acid; polystyrene; biodegradable plastic; plastic; polyethylene; polystyrene derivative; biodegradation; coastal water; concentration (composition); habitat structure; marine pollution; plastic; saltmarsh; source apportionment; Article; biodegradability; biofilm; coastal waters; controlled study; degradation; habitat; infrared spectroscopy; salt marsh; scanning electron microscopy; sea pollution; ultraviolet radiation; weight; ecosystem; environmental monitoring; water pollutant; wetland; Biodegradable Plastics; Ecosystem; Environmental Monitoring; Microplastics; Plastics; Polyethylene; Polystyrenes; Water Pollutants, Chemical; Wetlands
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148630
作者单位	Department of Biology, The Citadel, Military College of South Carolina, Charleston, SC 29409, United States; Grice Marine Laboratory, College of Charleston, Charleston, SC 29412, United States; Chemistry Department, The College of New Jersey, Ewing, NJ 08628, United States
推荐引用方式 GB/T 7714	Weinstein J.E.,Dekle J.L.,Leads R.R.,et al. Degradation of bio-based and biodegradable plastics in a salt marsh habitat: Another potential source of microplastics in coastal waters[J],2020,160.
APA	Weinstein J.E.,Dekle J.L.,Leads R.R.,&Hunter R.A..(2020).Degradation of bio-based and biodegradable plastics in a salt marsh habitat: Another potential source of microplastics in coastal waters.Marine Pollution Bulletin,160.
MLA	Weinstein J.E.,et al."Degradation of bio-based and biodegradable plastics in a salt marsh habitat: Another potential source of microplastics in coastal waters".Marine Pollution Bulletin 160(2020).