气候变化领域集成服务门户(CCPortal): Mobilization and bioaccessibility of cadmium in coastal sediment contaminated by microplastics

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DOI	10.1016/j.marpolbul.2019.07.046
	Mobilization and bioaccessibility of cadmium in coastal sediment contaminated by microplastics
	Martin K.; Turner A.
发表日期	2019
ISSN	0025326X
起始页码	940
结束页码	944
卷号	146
英文摘要	Cadmium has had a number of historical applications in plastics but is now highly regulated. In this study, plastics containing pigmented or recycled Cd at concentrations up to 16,300 μg g−1 were processed into microplastic-sized fragments and added to clean estuarine sediment. Plastic-sediment mixtures (mass ratio = 1:100) were subsequently exposed to fluids simulating the digestive conditions encountered in marine deposit-feeding invertebrates prepared from a protein and a bile acid surfactant in seawater and the mobilization of Cd measured as a function of time. Kinetic profiles over a six-hour period were complex, with some fitted using a diffusion model and others exhibiting evidence of Cd interactions between the plastic and sediment surface. The maximum concentration of Cd released from plastic-sediment mixtures was about 0.8 μg g−1 and orders of magnitude greater than Cd mobilization from sediment alone. It is predicted that large communities of deposit-feeders could mobilize significant quantities of Cd from historical microplastics. © 2019 Elsevier Ltd
英文关键词	Bioaccessibility; Cadmium; Deposit-feeders; Microplastics; Mobilization kinetics
语种	英语
scopus关键词	Deposits; Elastomers; Feeding; Microplastic; Mixtures; Plastics applications; Sediments; Bioaccessibility; Coastal sediments; Deposit feeder; Estuarine sediments; Maximum concentrations; Microplastics; Orders of magnitude; Sediment mixtures; Cadmium; bile acid; cadmium; plastic; sea water; surfactant; cadmium; plastic; cadmium; coastal sediment; deposit feeder; estuarine sediment; mobilization; plastic waste; reaction kinetics; seawater; sediment pollution; animal experiment; Article; bioaccumulation; chemical accident; chemical interaction; chemical reaction; coastal waters; concentration (parameter); controlled study; deposit feeder; diffusion; environmental exposure; estuary; flow kinetics; nonhuman; sediment; water contamination; aquatic species; chemistry; kinetics; metabolism; sediment; water pollutant; Invertebrata; Aquatic Organisms; Cadmium; Geologic Sediments; Kinetics; Plastics; Seawater; Water Pollutants, Chemical
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/149668
作者单位	School of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, United Kingdom
推荐引用方式 GB/T 7714	Martin K.,Turner A.. Mobilization and bioaccessibility of cadmium in coastal sediment contaminated by microplastics[J],2019,146.
APA	Martin K.,&Turner A..(2019).Mobilization and bioaccessibility of cadmium in coastal sediment contaminated by microplastics.Marine Pollution Bulletin,146.
MLA	Martin K.,et al."Mobilization and bioaccessibility of cadmium in coastal sediment contaminated by microplastics".Marine Pollution Bulletin 146(2019).