期刊
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
卷 4, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.hazadv.2021.100024
关键词
Soil-biodegradable plastic mulch; Micro-and nanoplastics (MNP); Environmental hazard; Degradation
资金
- Bioenergy, Natural Resources, and Environment from the USDA National Institute of Food and Agriculture [2020-67019-31149/1022234]
- China Scholarship Council [201806400008]
- USDA/NIFA
- USDA/NIFA [1014527, 1017286, W4188]
Micro-and nanoplastics are inevitably generated from biodegradable plastics during weathering and degradation, with the environmental risk depending on size, concentration, exposure time, and polymer characteristics. Proper disposal of soil-biodegradable plastic mulches can limit environmental harm, while inappropriate disposal may lead to environmental impacts.
Micro-and nanoplastics are inevitably generated from biodegradable plastics during weathering and degradation. In this perspective article, we discuss whether micro-and nanoplastics generated from biodegradable plastics, especially soil-biodegradable plastic mulches, are of environmental concern. The environmental risk of micro-and nanoplastics generated from soil-biodegradable plastic mulches depends on size, concentration, time of exposure, and polymer characteristics (e.g., surface charge and hydrophobicity), similar to that of micro-and nanoplastics from conventional plastics. We argue that micro-and nanoplastics generated from soil-biodegradable plastic mulches will likely not cause environmental harm if soil-biodegradable plastic mulches are disposed of appropriately into soil or compost, because soil-biodegradable plastic mulches can degrade in a relatively short time, limiting the accumulation and exposure of generated micro-and nanoplastics in the terrestrial environment. However, micro-and nanoplastics from soil-biodegradable plastic mulches can be of concern when inappropriate disposal or off-site transport to atmospheric and aquatic environments happens. In such cases, the micro-and nanoplastics can no longer degrade readily and may have environmental impacts.
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