分析化学2026，Vol.54Issue(5)：901-909,9.DOI:10.19756/j.issn.0253-3820.261035
重金属胁迫驱动微塑料表面菌群演替及其吸附特性变化分析
Heavy Metal Stress-Driven Succession of Microplastic Surface Microbial Communities and Their Adsorption Property Changes
摘要
Abstract
Both microplastics and heavy metal co-pollution are widely recognized as critical environmental concerns in marine ecosystems.Polyethylene terephthalate(PET),a typical microplastic in marine environments,was used as the study substrate.In-laboratory simulated heavy metal exposure experiments were conducted,combined with high-throughput sequencing and adsorption capacity analysis,to reveal the regulatory role of heavy metal stress on the structural composition of microplastic surface microbial communities,and to further investigate the impact of biofilms on heavy metal loading by microplastics.The results showed that heavy metal stress induced a low-abundance,high-uniformity profile in microplastic surface microbial communities.Differences in heavy metal stress mechanisms shaped unique microbial taxa on microplastic surfaces,driving adaptive succession in community structure,and led to increased abundance of heavy metal-tolerant groups such as the phylum Actinobacteriota.Across different treatment groups,5-9 unique microbial marker taxa were identified,with most dominant taxa belonging to the phyla Proteobacteria and Bacteroidetes,which maintained community stability through synergistic or competitive interactions.Biofilms enhanced heavy metal adsorption on microplastic surfaces by 1.21-fold to 3.47-fold by altering the physicochemical properties of the microplastic surface,while heavy metal type emerged as a key environmental factor influencing microbial community differentiation on microplastics.These findings elucidated the coupled interaction mechanism of microplastic-biofilm-heavy metal composite pollution and provided a critical theoretical basis for microbial-mediated remediation technologies targeting composite pollution.关键词
微塑料/生物膜/重金属胁迫/吸附特性/群落结构Key words
Microplastics/Biofilm/Heavy metal stress/Adsorption characteristics/Community structure引用本文复制引用
殷家璇,范伟,汪明烨,孙承君,丁金凤,李景喜..重金属胁迫驱动微塑料表面菌群演替及其吸附特性变化分析[J].分析化学,2026,54(5):901-909,9.基金项目
南亚防灾减灾能力建设合作项目(No.WJ1525011)和中国-东盟国家蓝色伙伴关系建设项目(No.WJ1325011)资助. Supported by the Cooperations on Capacity Building for Marine Disaster Prevention and Mitigation in South Asia(No.WJ1525011)and the China-ASEAN Blue Partnership Construction Project(No.WJ1325011). （No.WJ1525011）
