农田土壤地膜源微塑料分离检测方法优化

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Abstract An ultrasonic treatment was proposed to replace digestion to separate microplastics from mulch filmed soil samples in this study, and then, the microplastic indexes of the samples were quantified. The results showed that the surface impurities of microplastics derived from mulch film could be effectively removed to meet the quantitative requirements by using ultrasonic treatment at 40kHz and 30min. The original surface morphology and chemical properties of the microplastics could be retained to a greater extent using ultrasonic treatment which avoided complicated pipetting and standing operations. This method had no secondary breakage risk for microplastics and led to a final recovery rate of 92.9%. By optimizing the separation and detection method, the total reagent cost of single separation was reduced by more than 80%, and the separation time was shortened by more than 12hours. Obviously, the optimized separation approach proposed in this study would provide a solution to rapidly and accurately evaluating the abundance of microplastics from mulch filmed soils.

Key words： mulch film microplastics soil separation and detection ultrasonic processing

Received: 11 October 2022

PACS:	X53
	S19

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	Articles by authors
	BAI Run-hao
	CUI Ji-xiao
	FAN Rui-qi
	LI Zhen
	YANG Yang
	LIU Hong-jin
	HE Wen-qing

Cite this article:

BAI Run-hao,CUI Ji-xiao,FAN Rui-qi等. Optimization of the separation and detection method for microplastics from mulch film in agricultural soils[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(5): 2404-2412.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I5/2404

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