文献类型：期刊文献

英文题名：Aging of biodegradable microplastics and their effect on soil properties: Control from soil water

作者：Gong, Kailin[1];Peng, Cheng[1,2,3];Hu, Shuangqing[2];Xie, Wenwen[1];Chen, Anqi[1];Liu, Tianzi[1];Zhang, Wei[1]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Shanghai Acad Environm Sci, State Environm Protect Key Lab Environm Hlth Impac, Shanghai 200233, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2024

卷号：480

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20244217191014);WOS:【SCI-EXPANDED(收录号:WOS:001334970700001)】；

基金：This work was supported by the National Key Research and Development Program of China (2023YFC3711600) , the National Natural Science Foundation of China (42177395) , and the Special Fund of State Environmental Protection Key Laboratory of Environmental HealthImpact Assessment of Emerging Contaminants (SEPKL-EHIAEC-202207) . We thank the staff members at BL01B beamline of the National Facility for Protein Science in Shanghai (NFPS) , Shanghai Advanced Research Institute, Chinese Academy of Sciences, for providing technical support and assistance in data collection and analysis. The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help on the analysis and test. The au-thors express their gratitude to Mr. Runyu Zhang from the School of Chemical Engineering at East China University of Science and Tech-nology for providing invaluable assistance with the GPC analysis. The authors extend their gratitude to Ms. Mengjing Li from Shiyanjia Lab ( www.shiyanjia.com ) for providing invaluable assistance with the XPS analysis.

语种：英文

外文关键词：Biodegradable microplastics; Soil water content; Dissolved organic matter characteristics; Microbial community; Metagenomics

摘要：The ecological risks of biodegradable microplastics (BMPs) to soil ecosystems have received increasing attention. This study investigates the impacts of polylactic acid microplastics (PLA-MPs) and polybutylene adipate terephthalate microplastics (PBAT-MPs) on soil properties of black soil (BS) and fluvo-aquic soil (FS) under three water conditions including dry (Dry), flooded (FL), and alternate wetting and drying (AWD). The results show that BMPs exhibited more evident aging under Dry and AWD conditions compared to FL condition. However, BMPs aging under FL condition induced more substantial changes in soil properties, especially dissolved organic carbon (DOC) concentrations, than under Dry and AWD conditions. BMPs also increased the humification degree of soil dissolved organic matter (DOM), particularly in BS. Metagenomic analysis of PBAT-MPs treatments showed different changes in microbial community structure depending on soil moisture. Under Dry conditions, PBAT-MPs enhance the ammonium-producing process of soil microbial communities. Genes related to N nitrification and benzene degradation were enriched under AWD conditions. In contrast, PBAT-MPs do not change the abundance of genes related to the N cycle under FL conditions but significantly reduce genes related to benzene degradation. This reduction in benzene degradation genes under FL condition might potentially slow down the degradation of PBAT-MPs, and could lead to temporary accumulation of benzene-related intermediates. These findings highlight the complex interactions between BMPs, soil properties, and microbial communities, emphasizing the need for comprehensive evaluations of BMPs' environmental impacts under varying soil water conditions.