Your browser doesn't support javascript.
loading
Insights into effects of conventional and biodegradable microplastics on organic carbon decomposition in different soil aggregates.
Wang, Jiaxin; Song, Minghua; Lu, Mengnan; Wang, Chunmei; Zhu, Chenying; Dou, Xiaomin.
Afiliación
  • Wang J; College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
  • Song M; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, A11, Datun Road, Chaoyang District, Beijing, 100101, China.
  • Lu M; Beijing Langxinming Environmental Technology Co. Ltd., 16 W 4th Ring Middle Road, Haidian District, Beijing, 100080, China.
  • Wang C; College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China. Electronic address: wangcm@bjfu.edu.cn.
  • Zhu C; College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
  • Dou X; College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
Environ Pollut ; 359: 124751, 2024 Oct 15.
Article en En | MEDLINE | ID: mdl-39151783
ABSTRACT
The impacts of microplastics on soil ecological functions such as carbon recycling and soil structure maintenance have been extensively focused. However, the mechanisms underlying the impacts of microplastics on soil carbon transformation and soil microbial community at soil aggregate scale have not been clarified yet. In this work, the effects and action mechanisms of traditional microplastic polypropylene (PP) and degradable microplastic polylactic acid (PLA) on carbon transformation in three sizes of soil aggregates were investigated. The results showed that both PP and PLA promoted CO2 emission, and the effect depended on the type and content of microplastics, and the size of soil aggregates. Changes in soil carbon stocks were mainly driven by changes in organic carbon associated with macroaggregates. For macroaggregates, PP microplastics decreased soil organic carbon (SOC) as well as dissolved organic carbon (DOC). These changes were reversed in microaggregates and silt and clay. Interestingly, PLA increased the SOC, DOC and CO2 emissions in bulk soil and all three aggregates with a dose-effect response. These changes were associated with soil microbes, functional genes and enzymes associated with the degradation of labile and recalcitrant carbon fractions. Furthermore, PP and PLA reduced bacterial community diversities and shifted bacterial community structures in both the three aggregates and in bulk soil. Alterations of functional genes induced by microplastics were the key driving factors of their impacts on carbon transformation in soil aggregates. This research opened up a new insight into the mechanisms underlying the impacts of microplastics on soil carbon transformation, and helped us make rational assessments of the risks and the disturbances of microplastics on soil carbon cycling.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Contaminantes del Suelo / Carbono / Microplásticos Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Microbiología del Suelo / Contaminantes del Suelo / Carbono / Microplásticos Idioma: En Revista: Environ Pollut Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido