文献类型： 外文期刊
第一作者： Liu, Mengting
作者： Liu, Mengting;Lu, Shibo;Song, Yang;Lei, Lili;Hu, Jiani;Cao, Chengjin;He, Defu;Lv, Weiwei;Zhou, Wenzong;Shi, Huahong;Yang, Xiaofeng;He, Defu
作者机构：
关键词： Microplastics; Mesoplastics; Soils; Farmland; Terrestrial ecosystem
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
ISSN： 0269-7491
年卷期： 2018 年 242 卷
页码：
收录情况： SCI
摘要： Microplastics are emerging pollutants which have been extensively detected in water environments. However, little is known about microplastic pollution in soil environments. In this study, we investigated microplastics and mesoplastics in farmland soils from twenty vegetable fields around the suburbs of Shanghai. In each site, three duplicate soil samples were collected from shallow (0-3 cm) and deep soils (3-6 cm), respectively. Microplastics (sizes of 20 mu m - 5 mm) and mesoplastics (5 mm - 2 cm) were detected using methods of density extraction, 30% H2O2 digestion and micro-fourier transform infrared spectroscopy. The abundance of microplastics was 78.00 +/- 12.91 and 62.50 +/- 12.97 items kg(-1) in shallow and deep soils, respectively. While, mesoplastics were found with abundance of 6.75 +/- 1.51 and 3.25 +/- 1.04 items kg(-1) in shallow and deep soils. Among these micro(meso)plastics, 48.79% and 59.81% were in size of <1 mm in shallow and deep soils. The main morphotypes of microplastics included fiber, fragment and film, mostly in color of black or transparent. Moreover, we found that topsoil contained higher concentrations and larger sizes of micro(meso)plastics than deep soil. In addition, the vast majority of micro(meso)plastics were polypropylene (50.51%) and polyethylene (43.43%). This study reveals occurrence and characteristics of microplastic pollution in typical farmland soils. It provides important data for subsequent research on microplatics in the terrestrial ecosystem. (C) 2018 Elsevier Ltd. All rights reserved.
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