低密度聚乙烯薄膜微塑料在黄河口海岸带环境中的风化特征

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

	低密度聚乙烯薄膜微塑料在黄河口海岸带环境中的风化特征
	张晨捷 1,2,3; 涂晨 2; 周倩 2,3; 李连祯 2; 李远 2; 付传城 5; 潘响亮 1,4; 骆永明 2,3,5
刊名	土壤学报
	2021
卷号	58 期号:2 页码:456-463
关键词	黄河口海岸带 LDPE薄膜微塑料风化
ISSN号	0564-3929
其他题名	Weathering Characteristics of Microplastics of Low Density Polyethylene Film in the Coastal Environment of the Yellow River Estuary
文献子类	Article
英文摘要	【Objective】Microplastic pollution has become a global environmental issue that has caused widespread concern. Coastal zone is a region of land-ocean interaction under the dual impacts of global climate change and human activities. It is also an important sink for microplastics in the environment. However, by far little attention has been paid to long-term weathering characteristics of microplastics in coastal environments. In this study, microplastics of low density polyethylene(LDPE)film, which were commonly found in the coastal environments of the Yellow Sea and the Bohai Sea, were selected as the object for test in exploring long-term weathering characteristics of the microplastics in different coastal environments, including supratidal, intertidal and subtidal zones at the Yellow River Estuary. The aim of this study is to lay down a scientific basis for clarifying fates and effects of microplastics in the coastal environments. 【Method】Microplastics of LDPE film were left in the tidal zones for exposure to the coastal environment for 12 and 18 months. At the end of the each exposure period, they were retrieved for analysis of surface morphology, chemical functional groups(carbonyl index)and density with scanning electron microscopy, Fourier transform infrared spectrometry, and pycnometry. Weathering degree of the microplastics was characterized. 【Result】 Results show that after 18 months of exposure in the field, colonies of microorganisms were observed on the surface of the microplastics in all the zones and so were significant weathering characteristics. The microplastics in the supratidal zone exhibited the highest degree of cracking. Carbonyl groups were also observed on the surface of the microplastics regardless of where they were in, and in terms of carbonyl index of the microplastics, the three zones displayed an order of supratidal zone (0.28-0.81) > intertidal zone (0.18-0.22) > subtidal zone (0.16-0.20). The microplastics did not show much spatio-temporal variation in density. However, having been subjected to ultrasonic cleaning for removal of surface attachments, the microplastics exposed aboveground at the supratidal zone for 18 months were by (0.850.02 g·cm~(-3)) significantly lower than the untreated ones (0.930.03 g·cm~(-3)) in density.【Conclusion】The dynamic changes in morphological characteristics, chemical functional groups (carbonyl index) and density of the microplastics of LDPE film indicate that weathering degree of the microplastics varying with the tidal zone shows a declining order of supratidal zone > intertidal zone > subtidal zone, and the microplastics in the supratidal zone varied sharply with time in weathering characteristics. The microplastics in the coastal environment are subjected to physical, chemical and biological weathering, such as light, friction, chemical oxidation, and biodegradation. Among them, light-triggered photochemical oxidation may contribute the most to the weathering of microplastics. In the future, more attention should be paid to the research on potential environmental effects and fate of microplastics as affected by the complex environmental factors in the coastal environment.
语种	中文
CSCD记录号	CSCD:6961137
资助机构	国家重点研发计划项目 ; 中国科学院国际合作局对外合作重点项目 ; 中国科学院前沿科学重点研究项目
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/30282]
专题	烟台海岸带研究所_近岸生态与环境实验室
作者单位	1.新疆干旱区环境污染与生态修复重点实验室(中国科学院新疆生态与地理研究所),乌鲁木齐830011; 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),山东烟台264003; 3.中国科学院大学,北京100049; 4.浙江工业大学环境学院,杭州310014; 5.中国科学院土壤环境与污染修复重点实验室(南京土壤研究所),南京210008
推荐引用方式 GB/T 7714	张晨捷,涂晨,周倩,等. 低密度聚乙烯薄膜微塑料在黄河口海岸带环境中的风化特征[J]. 土壤学报,2021,58(2):456-463.
APA	张晨捷.,涂晨.,周倩.,李连祯.,李远.,...&骆永明.(2021).低密度聚乙烯薄膜微塑料在黄河口海岸带环境中的风化特征.土壤学报,58(2),456-463.
MLA	张晨捷,et al."低密度聚乙烯薄膜微塑料在黄河口海岸带环境中的风化特征".土壤学报 58.2(2021):456-463.