滨海河口潮滩中微塑料的表面风化和成分变化

doi:10.1360/N972017-00911

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室 > 近岸生态与环境实验室

	滨海河口潮滩中微塑料的表面风化和成分变化
	周倩 ; 章海波 ; 周阳 ; 代振飞 ; 李远 ; 付传城 ; 涂晨 ; 王文海 ; 骆永明
刊名	科学通报
	2018-01-20
卷号	63 期号:02 页码:214-224
关键词	微塑料河口潮滩方法学表面风化成分变化
ISSN号	0023-074X
DOI	10.1360/N972017-00911
其他题名	Surface weathering and changes in components of microplastics from estuarine beaches
产权排序	(1)中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所) ; (2)中国科学院大学资源与环境学院 ; (3)浙江农林大学环境与资源学院浙江省土壤污染生物修复重点实验室
英文摘要	Microplastics are a type of emerging environmental pollutant that has been the subject of increasing concern worldwide. The surface morphology, composition and changes in the distribution of microplastics in the environment are poorly understood. The corresponding research methodology is also at the exploratory stage. Here, we examine typical estuarine sediments from Shandong Province, east China, that are influenced by intensive human activity. The microplastics are separated from the sediments using an apparatus of continuous flow and floating separation. The microplastics samples are processed to determine the types, morphology and changing composition of microplastics present using a range of advanced microscopic and microanalytical methods. The aim is to understand the weathering and subsequent surface changes in the microplastics under the environmental conditions of estuarine sediments. Optical microscope and scanning electron microscope-energy spectrum (SEM-EDS) analysis shows that foams and pellets, together with fragments, fibers and films, are present in the estuarine sediments. The five shape types of microplastics had different weathering surface morphologies compared to the corresponding large plastic debris from the same sampling sites and to the corresponding commercial plastic products. The surfaces of the commercial products are smooth. The surfaces of plastic debris appear to be slightly broken and aged while the surface of microplastics from the same sites show many more microholes, cracks or protuberances. This indicates that the surfaces of microplastics on the estuarine beaches have been strongly weathered. Scratches, creases, microholes, cracks, either concave or convex and of various shapes and sizes were found on the surfaces of microplastics from the coastal environment, possibly due to mechanical friction, chemical oxidation and/or biological attack. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR) was used to find oxygen-containing functional groups such as carboxylic acids, aldehydes and esters or ketones on the microplastic surfaces from the tidal flats on the basis of polymer component analysis. The two selected shape types, namely foams and fragments from soft plastic woven bags, had different infrared spectra than their corresponding large plastic debris from the same sampling sites and to the original commercial plastic products. The surfaces of these two microplastics had more complicated infrared spectra near the fingerprint area. This implies that the aging process of large plastic debris may be an important source of microplastics in the environment. A polymer blend of both polyethylene and polypropylene was identified in the fibers using pyrolysis gas chromatography-mass spectrometry (pyr-GC-MS). The pyr-GC-MS analysis also indicates that the pyrolysis products were much common on the aged surfaces of foams from the beach than on the inner part of foams after removal of the aged surfaces, including mainly compounds containing oxygen or nitrogen such as oleanitrile, trans-13-docosenamide, α-n-normethadol; 1,1-diphenyl-spiro[2,3] hexane-5-carboxylic acid, methyl ester, hexadecanoic acid, octadecyl ester and hexadecanoic acid, hexadecyl ester. The surficial morphology, composition and possible properties of microplastics from the estuarine beaches were clearly different from those of the original commercial plastic products.
资助项目	Key Research Project of Frontier Science of Chinese Academy of Sciences[QYZDJ-SSW-DQC015] ; National Key R D projects[2016YFC1402202] ; National Natural Science Foundation of China[41771351]
语种	中文
CSCD记录号	CSCD:6185560
资助机构	中国科学院前沿科学重点研究项目#QYZDJ-SSW-DQC015 ; 科技部重点科技专项#2016YFC1402202 ; 国家自然科学基金#41771351
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24339]
专题	烟台海岸带研究所_近岸生态与环境实验室烟台海岸带研究所_污染过程与控制实验室烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.中国科学院大学资源与环境学院; 2.中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所); 3.浙江农林大学环境与资源学院浙江省土壤污染生物修复重点实验室
推荐引用方式 GB/T 7714	周倩,章海波,周阳,等. 滨海河口潮滩中微塑料的表面风化和成分变化[J]. 科学通报,2018,63(02):214-224.
APA	周倩.,章海波.,周阳.,代振飞.,李远.,...&骆永明.(2018).滨海河口潮滩中微塑料的表面风化和成分变化.科学通报,63(02),214-224.
MLA	周倩,et al."滨海河口潮滩中微塑料的表面风化和成分变化".科学通报 63.02(2018):214-224.