乌梁素海水体微塑料空间分布规律及影响因素

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Abstract In order to investigate the distribution of microplastics in the water body of Ulansuhai, different densities, sizes and shapes of microplastics at different locations of the lake were observed for abundance by test methods, and the effects of properties (density, shape and size) of the microplastics on the spatial distribution were analyzed at the same time. The results showed that the abundance ranges of microplastics at different sampling sites in the lake with density ranges less than 1.0g/cm³, 1.0 ~1.2g/cm³ and 1.2 ~1.5g/cm³ were (109.5±17.3) ~(642±160) n/L, (160.5±57.3) ~(588±104) n/L and (124.5±47.5) ~(502.5±80.2) n/L respectively. For the microplastics with density less than 1.0g /cm3, the abundance in the lake increased gradually from north to south, for the microplastics with density 1.0~1.2g/cm³, the abundance in the middle of the lake was higher than in the north and south of the lake, and for the microplastics with density 1.2~1.5g/cm³, the abundance showed a decreasing trend from north to south. the abundance ranges of microplastics of sizes 0.05~0.5mm, 0.5~2mm and 2~5mm in the lake were (70.5±8.8)~(805.5±154.7) n/L, (178.5±21.4) ~(742.5±112.3) n/L and 0~(217.5±22.8) n/L respectively. The abundance of microplastics of size 0.05~0.5mm showed an increasing trend from north to south, and of sizes 0.5~2mm and 2~5mm showed a decreasing trend from north to south. The abundance ranges of fibrous, fragmentary, membranous and massive shapes of microplastics were (499.5±92.3)~(1126.5±228) n/L, (30±4.8) ~(151.5±31.6) n/L, (4.5±0.8)~(229.5±61.6) n/L and (1.5±0.2)~(12±3.9) n/L respectively. The fibrous microplastics were dominant and evenly distributed at all sampling points, while the fragmentary, membranous and massive microplastics were of low abundance without obvious regularity. of all microplastics identified by Raman spectroscopy, polypropylene (43%) was the most common type, followed by polyvinyl chloride (18%), polyethylene terephthalate (18%), polyethylene (11.7%) and polystyrene (9.3%).

Key words： microplastics Ulansuhai spatial distribution influence factors Raman spectroscopy

Received: 16 December 2021

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X524

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	HAO Ruo-nan
	SHI Xiao-hong
	LIU Yu
	ZHANG Fan

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HAO Ruo-nan,SHI Xiao-hong,LIU Yu等. Spatial distribution and influencing factors of microplastics in water of Ulansuhai[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(7): 3316-3324.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I7/3316

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