滨海城市大气环境中发现多种微塑料及其沉降通量差异

doi:doi:10.1360/N972017-00956

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

	滨海城市大气环境中发现多种微塑料及其沉降通量差异
	周倩 ; 田崇国 ; 骆永明
刊名	科学通报
	2017-11-30
卷号	62 期号:33 页码:3902-3909
关键词	microplastics coastal city atmospheric environment shape types deposition flux seasonal variation 微塑料滨海城市大气环境形貌类型沉降通量季节性变化
ISSN号	0023-074X
DOI	doi:10.1360/N972017-00956
其他题名	Various forms and deposition fluxes of microplastics identified in the coastal urban atmosphere
产权排序	(1) 中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室 ; (2) 中国科学院大学资源与环境学院
文献子类	Article
英文摘要	Pollution by microplastics has become a major global issue affecting the marine environment. However,there has been little research on microplastics in the atmosphere. Here,we study microplastics in precipitation samples collected in Yantai,a coastal city in Shandong Province,East China. This paper is the first report on the different shapes,deposition fluxes and seasonal variation in microplastics in the coastal urban atmospheric environment. The samples collected were pre-filtered using a set of stainless steel sieves with mesh sizes of 5 and 1 mm. Residues,such as insects and plant debris retained on a stainless steel sieve of mesh size 5 mm were discarded or archived. Residues retained on a stainless steel sieve of mesh size 1 mm were air-dried and placed under a stereomicroscope to select and count putative microplastics with different morphologies and different size fractions of 1-2,2-3 and 3-5 mm. Samples that had passed through a mesh size of 1 mm were filtered again using a 5-mum pore size nitrocellulose filter for further microscopic observation and the selection and enumeration of smaller microplastics. Some of these samples containing organisms were digested with hydrogen peroxide (30%) to avoid interference during the observation and selection of the microplastics. Putative microplastics were identified using Fourier transform infrared spectroscopy. Four shape types of microplastics,namely fibers,fragments,films and foams were found in the atmospheric samples. The majority were fibers of different colors (white,black,red and transparent) that accounted for about 95% of the microplastics. Fragments accounted for about 4% and films and foams accounted for fewer than 1%. The main polymers were polyethylene terephthalate in the case of most of the fibers,polyvinyl chloride in the case of some fibers and films,polyethylene for the fragments,and polystyrene for the foams. Microplastics with sizes below 0.5 mm accounted for more than 50% throughout the year,followed by the size ranges 0.5-1 mm,1-2 mm and then 2-3 mm. Microplastics with size range of 3-5 mm appeared only in the spring samples at low abundance. In general,the amount of microplastics decreased dramatically with increasing particle size. The 100-300 mum size fraction formed the highest proportion of microplastics below 0.5 mm in size,accounting for about 62%,and those below 50 mum showed the lowest abundance. The annual site deposition flux of atmospheric microplastics attained a maximum of 1.4610~5 n/(m~2 a),that of the fibers up to 1.3810~5 n/(m~2 a),and those of the fragments,films and foams up to 6.2910~3,7.6510~2 and 2.4510~2 n/(m~2 a),respectively. Deposition fluxes of different shape types ranged from 0.0 to 6.0210~2 n/(m~2 d),and the fibers were also the commonest of the four shape types. The deposition flux of microplastics showed some seasonal variation,being higher in the spring,summer and winter and lowest in the autumn. Based on the observation site (1.6 km from the coastline),the length of Yantai urban coastline (100 km) and the annual deposition flux in this study,it was estimated that the total number of microplastics deposited in the urban area was about 2.33*10~(13) particles,equivalent to about 0.9 to 1.4 tonnes. We suggest that atmospheric microplastics,through precipitation to land and sea,be a key source of microplastics in the coastal and oceanic environments. Moreover,a systematic study is urgently required in the future for a better understanding of pollution and precipitation of atmospheric microplastics and their environmental impact.
WOS关键词	Environmental Sciences & Ecology
WOS研究方向	Environmental Sciences & Ecology ; 环境科学与生态学
语种	中文
CSCD记录号	CSCD:6145725
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/24247]
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_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.中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室; 2.中国科学院大学资源与环境学院
推荐引用方式 GB/T 7714	周倩,田崇国,骆永明. 滨海城市大气环境中发现多种微塑料及其沉降通量差异[J]. 科学通报,2017,62(33):3902-3909.
APA	周倩,田崇国,&骆永明.(2017).滨海城市大气环境中发现多种微塑料及其沉降通量差异.科学通报,62(33),3902-3909.
MLA	周倩,et al."滨海城市大气环境中发现多种微塑料及其沉降通量差异".科学通报 62.33(2017):3902-3909.