TY - JOUR
T1 - Centennial Records of Microplastics in Lake Cores in Huguangyan Maar Lake, China
AU - Ji, Qingsong
AU - Zhang, Yanxia
AU - Xia, Yubao
AU - Wang, Xinkai
AU - He, Maoyong
AU - Yang, Yi
AU - Sabel, Clive E.
AU - Huang, Bin
AU - Zhu, Fengxiao
AU - Shao, Min
AU - Xie, Enze
AU - Yan, Guojing
AU - Li, Guonai
AU - Zhou, Aoyu
AU - He, Huan
AU - Zhang, Limin
AU - Jin, Zhangdong
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/6/25
Y1 - 2024/6/25
N2 - Microplastic records from lake cores can reconstruct the plastic pollution history. However, the associations between anthropogenic activities and microplastic accumulation are not well understood. Huguangyan Maar Lake (HML) is a deep-enclosed lake without inlets and outlets, where the sedimentary environment is ideal for preserving a stable and historical microplastic record. Microplastic (size: 10-500 μm) characteristics in the HML core were identified using the Laser Direct Infrared Imaging system. The earliest detectable microplastics appeared unit in 1955 (1.1 items g-1). The microplastic abundance ranged from n.d. to 615.2 items g-1 in 1955-2019 with an average of 134.9 items g-1. The abundance declined slightly during the 1970s and then increased rapidly after China’s Reform and Opening Up in 1978. Sixteen polymer types were detectable, with polyethylene and polypropylene dominating, accounting for 23.5 and 23.3% of the total abundance, and the size at 10-100 μm accounted for 80%. Socioeconomic factors dominated the microplastic accumulation based on the random forest modeling, and the contributions of GDP per capita, plastic-related industry yield, and total crop yield were, respectively, 13.9, 35.1, and 9.3% between 1955-2019. The total crop yield contribution further increased by 1.7% after 1978. Coarse sediment particles increased with soil erosion exacerbated microplastics discharging into the sediment.
AB - Microplastic records from lake cores can reconstruct the plastic pollution history. However, the associations between anthropogenic activities and microplastic accumulation are not well understood. Huguangyan Maar Lake (HML) is a deep-enclosed lake without inlets and outlets, where the sedimentary environment is ideal for preserving a stable and historical microplastic record. Microplastic (size: 10-500 μm) characteristics in the HML core were identified using the Laser Direct Infrared Imaging system. The earliest detectable microplastics appeared unit in 1955 (1.1 items g-1). The microplastic abundance ranged from n.d. to 615.2 items g-1 in 1955-2019 with an average of 134.9 items g-1. The abundance declined slightly during the 1970s and then increased rapidly after China’s Reform and Opening Up in 1978. Sixteen polymer types were detectable, with polyethylene and polypropylene dominating, accounting for 23.5 and 23.3% of the total abundance, and the size at 10-100 μm accounted for 80%. Socioeconomic factors dominated the microplastic accumulation based on the random forest modeling, and the contributions of GDP per capita, plastic-related industry yield, and total crop yield were, respectively, 13.9, 35.1, and 9.3% between 1955-2019. The total crop yield contribution further increased by 1.7% after 1978. Coarse sediment particles increased with soil erosion exacerbated microplastics discharging into the sediment.
KW - anthropogenic activities
KW - lake sediment cores
KW - microplastic records
KW - random forest models
KW - stratigraphic markers
UR - http://www.scopus.com/inward/record.url?scp=85196040104&partnerID=8YFLogxK
U2 - 10.1021/acs.est.4c01970
DO - 10.1021/acs.est.4c01970
M3 - Article
AN - SCOPUS:85196040104
SN - 0013-936X
VL - 58
SP - 11140
EP - 11151
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 25
ER -