Analysis on the occurrence characteristics and influencing factors of microplastics in Harbin agricultural soils
YU Qing-xin1, LIU Shuo1, MA Li-na2,3, MEN Zhi-yuan1, LI Tao-tao1, CAI Lu-yao1, SUN Meng1
1. College of Geographical Science, Harbin Normal University, 150025, Harbin, China; 2. School of Environment, Harbin Institute of Technology, 150090, Harbin, China; 3. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 150090, Harbin, China
Abstract：To investigate the characteristics and influencing factors of microplastics (MPs) in agricultural soils, the abundance, appearance characteristics and types of MPs in Harbin agricultural soils were analyzed qualitatively and quantitatively by body microscopy, Fourier transform infrared spectrometer and Scanning Electron Microscopy(SEM). The characteristics of MPs in agricultural soils were analyzed by comparison with the presence or absence of agricultural films as a classification. The results showed that the abundance of MPs in agricultural soils in the study area ranged from 198.32 to 1002.61n/kg, with a mean value of about 485.80n/kg, and the abundance of MPs in soils with agricultural film cover was 1.69 times higher than that without agricultural film cover. In the vertical spatial distribution, the abundance of MPs decreased with increasing depth. The average abundance of MPs was about (567.70±210.53) n/kg in the plow layer soil, and the abundance of MPs decreased to (403.80±141.66)n/kg in the plow bottom layer, with a decrease of 40.59%. The highest percentage of MPs type was PE (46.61%) in the soil with agricultural film cover and PP (38.76%) in the soil without agricultural film cover. The particle composition of the soil had a great influence on the distribution of MPs in the soil, with clay particles being the main factor affecting the abundance of MPs (r=-0.6, P<0.05). The findings of this paper can provide reference data for the standardization of MPs contamination assessment in agricultural soils and provide a basis for the migration of MPs in soils.
于庆鑫, 刘硕, 马丽娜, 门志远, 李陶陶, 蔡露瑶, 孙萌. 哈尔滨农田土壤中微塑料的赋存特征及影响因素分析[J]. 中国环境科学, 2023, 43(2): 793-799.
YU Qing-xin, LIU Shuo, MA Li-na, MEN Zhi-yuan, LI Tao-tao, CAI Lu-yao, SUN Meng. Analysis on the occurrence characteristics and influencing factors of microplastics in Harbin agricultural soils. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(2): 793-799.
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